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Vol. 51 N° 35 - Septembre 2012 [texte imprimé] . - 2012 . - p. 11301-11592 : ill. ; 28 cm. Chemical engineering Langues : Anglais (eng)
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Ajouter le résultat dans votre panierThe Combination of itaconic acid and sodium hypophosphite as a new cross - linking system for cotton / Huitao Peng in Industrial & engineering chemistry research, Vol. 51 N° 35 (Septembre 2012)
Titre : The Combination of itaconic acid and sodium hypophosphite as a new cross - linking system for cotton Type de document : texte imprimé Auteurs : Huitao Peng, Auteur ; Charles Q. Yang, Auteur ; Xilie Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 11301-11311 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Itaconic acid Résumé : In this research, we studied cross-linking of cotton fabrics using the combination of itaconic acid (ITA) and sodium hypophosphite (NaH2PO2). ITA, a bifunctional carboxylic acid, was able to esterify cotton cellulose to form a single ester linkage, but it was not able to form cross-linking between two cellulose molecules. In the presence of NaH2PO2, the amount of ester formed on cotton fabric was increased substantially and the esterification temperature of ITA was reduced. Therefore, NaH2PO2 functioned as a catalyst for esterification of cotton by ITA. Moreover, we found that wrinkle resistance of the cotton fabric was significantly improved when cotton fabrics were treated with the combination of ITA and NaH2PO2.We also found that phosphorus was bound to the treated cotton fabric and that the increase in the wrinkle recovery angle of the treated fabric was correlated to the increase in the amount of phosphorus bound to cotton. All the data indicated that H–P–H of sodium hypophosphite probably reacts with the >C═C ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3005644
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11301-11311[article] The Combination of itaconic acid and sodium hypophosphite as a new cross - linking system for cotton [texte imprimé] / Huitao Peng, Auteur ; Charles Q. Yang, Auteur ; Xilie Wang, Auteur . - 2012 . - pp. 11301-11311.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11301-11311
Mots-clés : Itaconic acid Résumé : In this research, we studied cross-linking of cotton fabrics using the combination of itaconic acid (ITA) and sodium hypophosphite (NaH2PO2). ITA, a bifunctional carboxylic acid, was able to esterify cotton cellulose to form a single ester linkage, but it was not able to form cross-linking between two cellulose molecules. In the presence of NaH2PO2, the amount of ester formed on cotton fabric was increased substantially and the esterification temperature of ITA was reduced. Therefore, NaH2PO2 functioned as a catalyst for esterification of cotton by ITA. Moreover, we found that wrinkle resistance of the cotton fabric was significantly improved when cotton fabrics were treated with the combination of ITA and NaH2PO2.We also found that phosphorus was bound to the treated cotton fabric and that the increase in the wrinkle recovery angle of the treated fabric was correlated to the increase in the amount of phosphorus bound to cotton. All the data indicated that H–P–H of sodium hypophosphite probably reacts with the >C═C ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3005644 Exemplaires
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Titre : A Meticulous study on the adsorption of mercury as tetrachloromercurate(II) anion with trioctylamine modified sodium montmorillonite and its application to a coal fly ash sample Type de document : texte imprimé Auteurs : A. Santhana Krishna Kumar, Auteur ; S. Kalidhasan, Auteur ; Vidya Rajesh, Auteur Année de publication : 2012 Article en page(s) : pp. 11312-11327 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Fly ash Coal Montmorillonite Adsorption Résumé : Clay materials have hogged the limelight for their effectiveness in environmental remediation. In this paper, we report an effective solid phase extraction method for mercury based on the adsorption of tetrachloromercurate(II) anion with trioctylamine intercalated onto sodium montmorillonite. The adsorption is facile in acidic medium, and the adsorbent was well characterized by diverse physicochemical and spectroscopic techniques. Various isotherm models were employed to correlate the experimental adsorption data. The electrostatic interaction between HgCl42― and the protonated amine is well supported by a Langmuir isotherm model with a maximum adsorption capacity of 140.84 mg g―1. The ordered transition state that arises due to the proximity of the HgCl42― and the positively charged amine is accompanied by a decrease in the translational entropy of the system. The N2 adsorption-desorption isotherm study revealed the mesoporous nature of the adsorbent, and the thermodynamically favorable adsorption process resonates well with the ensuing negative free energy and enthalpy changes in accordance with the sorption mechanism. Packed bed column study demonstrated the scale up to 800 mL sample volume at 10 mg L―1 Hg(II) concentration, and the adsorbent could be regenerated and reused for 10 cycles with thiourea as the eluent. The removal of mercury from a coal fly ash sample validated the method. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324779
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11312-11327[article] A Meticulous study on the adsorption of mercury as tetrachloromercurate(II) anion with trioctylamine modified sodium montmorillonite and its application to a coal fly ash sample [texte imprimé] / A. Santhana Krishna Kumar, Auteur ; S. Kalidhasan, Auteur ; Vidya Rajesh, Auteur . - 2012 . - pp. 11312-11327.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11312-11327
Mots-clés : Fly ash Coal Montmorillonite Adsorption Résumé : Clay materials have hogged the limelight for their effectiveness in environmental remediation. In this paper, we report an effective solid phase extraction method for mercury based on the adsorption of tetrachloromercurate(II) anion with trioctylamine intercalated onto sodium montmorillonite. The adsorption is facile in acidic medium, and the adsorbent was well characterized by diverse physicochemical and spectroscopic techniques. Various isotherm models were employed to correlate the experimental adsorption data. The electrostatic interaction between HgCl42― and the protonated amine is well supported by a Langmuir isotherm model with a maximum adsorption capacity of 140.84 mg g―1. The ordered transition state that arises due to the proximity of the HgCl42― and the positively charged amine is accompanied by a decrease in the translational entropy of the system. The N2 adsorption-desorption isotherm study revealed the mesoporous nature of the adsorbent, and the thermodynamically favorable adsorption process resonates well with the ensuing negative free energy and enthalpy changes in accordance with the sorption mechanism. Packed bed column study demonstrated the scale up to 800 mL sample volume at 10 mg L―1 Hg(II) concentration, and the adsorbent could be regenerated and reused for 10 cycles with thiourea as the eluent. The removal of mercury from a coal fly ash sample validated the method. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324779 Exemplaires
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Titre : Conductometric performance of two - pole and five - ring conductivity cell probes for lanthanide determination using EDTA and DCTA as potential sequestering agents Type de document : texte imprimé Auteurs : Komal Matharu, Auteur ; Susheel K Mittal, Auteur ; S. K. Ashok Kumar, Auteur Année de publication : 2012 Article en page(s) : pp. 11328-11334 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Conductometric Lanthanide Résumé : An improved conductometric titration method has been developed for the easy detection of lanthanides in the presence of interfering ions using a five-ring conductivity probe. These measurements were compared with those from a two-pole conductivity cell. Conductometric titrations of lanthanides with ethylenediaminetetraacetic acid (EDTA) and trans-1,2-diaminocyclohexanetetraacetic acid (DCTA) as complexing agents were successfully carried out in the presence of alkaline earth metal ions, transition metal ions, and other metal ions, such as Al3+ and Th4+, as interfering ions. The performance of the titrations of binary mixtures of Al(III) and lanthanides further improved and distinct end points corresponding to the stoichiometric ratio could be observed in mixed solvent media containing 1,4-dioxane (10―20%) which otherwise showed interference in aqueous media. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301141g
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11328-11334[article] Conductometric performance of two - pole and five - ring conductivity cell probes for lanthanide determination using EDTA and DCTA as potential sequestering agents [texte imprimé] / Komal Matharu, Auteur ; Susheel K Mittal, Auteur ; S. K. Ashok Kumar, Auteur . - 2012 . - pp. 11328-11334.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11328-11334
Mots-clés : Conductometric Lanthanide Résumé : An improved conductometric titration method has been developed for the easy detection of lanthanides in the presence of interfering ions using a five-ring conductivity probe. These measurements were compared with those from a two-pole conductivity cell. Conductometric titrations of lanthanides with ethylenediaminetetraacetic acid (EDTA) and trans-1,2-diaminocyclohexanetetraacetic acid (DCTA) as complexing agents were successfully carried out in the presence of alkaline earth metal ions, transition metal ions, and other metal ions, such as Al3+ and Th4+, as interfering ions. The performance of the titrations of binary mixtures of Al(III) and lanthanides further improved and distinct end points corresponding to the stoichiometric ratio could be observed in mixed solvent media containing 1,4-dioxane (10―20%) which otherwise showed interference in aqueous media. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301141g Exemplaires
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Titre : Synthesis of methyl N - phenyl carbamate catalyzed by ionic liquid - promoted zinc acetate Type de document : texte imprimé Auteurs : Xinqiang Zhao, Auteur ; Lijuan Kang, Auteur ; Na Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 11335-11340 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ionic liquid Catalytic reaction Résumé : A series of ionic liquid-promoted zinc acetate catalysts (Zn(OAc)2-ILs) were prepared by separately mixing anhydrous zinc acetate with one of some ionic liquids, and their catalytic performance for the synthesis of methyl N-phenyl carbamate (MPC) from aniline and dimethyl carbonate (DMC) was evaluated. Among the catalysts, Zn(OAc)2-[bmim]PF6 showed the best catalytic performance. Under the suitable reaction conditions, aniline conversion and MPC selectivity were 99.8% and 99.1%, respectively. Moreover, Zn(OAc)2-[bmim]PF6 could be used five times without a significant loss in its catalytic performance. The mechanism for the promotion of ionic liquid [bmim]PF6 on the catalytic performance of zinc acetate was investigated by means of FT-IR analysis. The results show that a hydrogen bond is formed between the carbonyl oxygen of zinc acetate and the C2-H on an imidazoiume ring of [bmim]PF6. As a result, the zinc acetate changes from a bidentate to a unidentate coordination structure. Simultaneously, this change promotes the coordination of the carbonyl oxygen in a DMC molecule with the zinc atom in the zinc acetate molecule, faciliting the attack of the nitrogen atom in an aniline molecule on the carbonyl carbon in the coordinated DMC molecule and then the formation of MPC. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324781
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11335-11340[article] Synthesis of methyl N - phenyl carbamate catalyzed by ionic liquid - promoted zinc acetate [texte imprimé] / Xinqiang Zhao, Auteur ; Lijuan Kang, Auteur ; Na Wang, Auteur . - 2012 . - pp. 11335-11340.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11335-11340
Mots-clés : Ionic liquid Catalytic reaction Résumé : A series of ionic liquid-promoted zinc acetate catalysts (Zn(OAc)2-ILs) were prepared by separately mixing anhydrous zinc acetate with one of some ionic liquids, and their catalytic performance for the synthesis of methyl N-phenyl carbamate (MPC) from aniline and dimethyl carbonate (DMC) was evaluated. Among the catalysts, Zn(OAc)2-[bmim]PF6 showed the best catalytic performance. Under the suitable reaction conditions, aniline conversion and MPC selectivity were 99.8% and 99.1%, respectively. Moreover, Zn(OAc)2-[bmim]PF6 could be used five times without a significant loss in its catalytic performance. The mechanism for the promotion of ionic liquid [bmim]PF6 on the catalytic performance of zinc acetate was investigated by means of FT-IR analysis. The results show that a hydrogen bond is formed between the carbonyl oxygen of zinc acetate and the C2-H on an imidazoiume ring of [bmim]PF6. As a result, the zinc acetate changes from a bidentate to a unidentate coordination structure. Simultaneously, this change promotes the coordination of the carbonyl oxygen in a DMC molecule with the zinc atom in the zinc acetate molecule, faciliting the attack of the nitrogen atom in an aniline molecule on the carbonyl carbon in the coordinated DMC molecule and then the formation of MPC. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324781 Exemplaires
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Titre : Effect of reaction temperature and catalyst type on the formation of boron nitride nanotubes by chemical vapor deposition and measurement of their hydrogen storage capacity Type de document : texte imprimé Auteurs : Burcu Saner Okan, Auteur ; Zuleyha Ozlem Kocabas, Auteur ; Asli Nalbant Ergun, Auteur Année de publication : 2012 Article en page(s) : pp. 11341–11347 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalyst Nanotubes Résumé : Boron nitride nanotubes (BNNT) were synthesized over both Fe3+ impregnated MCM-41 (mobil composition of matter no. 41) and Fe2O3/MCM-41 complex catalyst systems at relatively low temperatures for 1 h by the chemical vapor deposition technique in large quantities. The formation of BNNT was tailored at different reaction temperatures by changing catalyst type. The use of Fe3+-MCM-41 and Fe2O3 as a complex catalyst system led to thin and thick tube formations. The diameters of BNNTs were in the range of 2.5–4.0 nm for thin tubes and 20–60 nm for thick tubes. The thin tube formation originated from the growth of BNNT over Fe3+-MCM-41 due to its average pore size of 4 nm. Higher reaction temperatures caused both BNNT and iron-based side product formations. The hydrogen uptake capacity measurements by the Intelligent Gravimetric Analyzer at room temperature showed that BNNTs could adsorb 0.85 wt % hydrogen which was two times larger than that for commercial carbon nanotubes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301605z
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11341–11347[article] Effect of reaction temperature and catalyst type on the formation of boron nitride nanotubes by chemical vapor deposition and measurement of their hydrogen storage capacity [texte imprimé] / Burcu Saner Okan, Auteur ; Zuleyha Ozlem Kocabas, Auteur ; Asli Nalbant Ergun, Auteur . - 2012 . - pp. 11341–11347.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11341–11347
Mots-clés : Catalyst Nanotubes Résumé : Boron nitride nanotubes (BNNT) were synthesized over both Fe3+ impregnated MCM-41 (mobil composition of matter no. 41) and Fe2O3/MCM-41 complex catalyst systems at relatively low temperatures for 1 h by the chemical vapor deposition technique in large quantities. The formation of BNNT was tailored at different reaction temperatures by changing catalyst type. The use of Fe3+-MCM-41 and Fe2O3 as a complex catalyst system led to thin and thick tube formations. The diameters of BNNTs were in the range of 2.5–4.0 nm for thin tubes and 20–60 nm for thick tubes. The thin tube formation originated from the growth of BNNT over Fe3+-MCM-41 due to its average pore size of 4 nm. Higher reaction temperatures caused both BNNT and iron-based side product formations. The hydrogen uptake capacity measurements by the Intelligent Gravimetric Analyzer at room temperature showed that BNNTs could adsorb 0.85 wt % hydrogen which was two times larger than that for commercial carbon nanotubes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301605z Exemplaires
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Titre : Preparation and characterization of high - performance perfluorosulfonic acid / SiO2 nanofibers with catalytic property via electrospinning Type de document : texte imprimé Auteurs : Pei-Pei Lu, Auteur ; Zhen-Liang Xu, Auteur ; Hu Yang, Auteur Année de publication : 2012 Article en page(s) : pp. 11348-11354 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalytic reaction Preparation Résumé : Polymer nanofiber-supported perfluorosulfonic acid (PFSA)/SiO2 catalysts are successfully fabricated by electrospinning method from polymer/nanoparticle suspensions. This kind of catalyst has a large number of active acid sites and high specific surface area up to 85.6 m2/g. Scanning electron microscope images reveal that the catalysts present high porosity and inner-connected porous structure which varies much with SiO2 loading. Nitrogen adsorption-desorption measurements demonstrate a wide distribution of pore sizes inside the composites. Catalysts of different compositions are evaluated in esterification in a batch reactor under various conditions, and the results indicate that those of 20 wt % PFSA loading have the best activity of unit PFSA. Supporting PFSA by a nanofibrous matrix enhances liquid holdups inside the catalysts and offers accessibility of the acid sites, and therefore improves the activity of the catalysts. Moreover, these catalysts allow recovery at high percentages and regeneration with high activity. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324783
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11348-11354[article] Preparation and characterization of high - performance perfluorosulfonic acid / SiO2 nanofibers with catalytic property via electrospinning [texte imprimé] / Pei-Pei Lu, Auteur ; Zhen-Liang Xu, Auteur ; Hu Yang, Auteur . - 2012 . - pp. 11348-11354.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11348-11354
Mots-clés : Catalytic reaction Preparation Résumé : Polymer nanofiber-supported perfluorosulfonic acid (PFSA)/SiO2 catalysts are successfully fabricated by electrospinning method from polymer/nanoparticle suspensions. This kind of catalyst has a large number of active acid sites and high specific surface area up to 85.6 m2/g. Scanning electron microscope images reveal that the catalysts present high porosity and inner-connected porous structure which varies much with SiO2 loading. Nitrogen adsorption-desorption measurements demonstrate a wide distribution of pore sizes inside the composites. Catalysts of different compositions are evaluated in esterification in a batch reactor under various conditions, and the results indicate that those of 20 wt % PFSA loading have the best activity of unit PFSA. Supporting PFSA by a nanofibrous matrix enhances liquid holdups inside the catalysts and offers accessibility of the acid sites, and therefore improves the activity of the catalysts. Moreover, these catalysts allow recovery at high percentages and regeneration with high activity. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324783 Exemplaires
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Titre : Inlet cone effect on diesel particulate filter regeneration upon a rapid shift to idle Type de document : texte imprimé Auteurs : Mengting Yu, Auteur ; Dan Luss, Auteur Année de publication : 2012 Article en page(s) : pp. 11355–11366 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Diesel engine Résumé : The particulate matter (PM) emitted by a diesel engine is collected and then burned in a diesel particulate filter (DPF). A major technological challenge in the operation of the ceramic, often cordierite, filter is that a rapid shift to idle may create a local hot region with a temperature much higher than under stationary feed conditions. This excessive transient temperature rise may cause local melting or cracking of the ceramic filter. Almost all previous studies of temperature excursions during the DPF regeneration (combustion of the deposited PM) were of cases in which equal exhaust flow rate was fed to all the parallel inlet channels. The diesel engine exhaust pipe is sometimes connected to the DPF by a wide-angled cone (diffuser). This leads to a mal-distribution of the flow rate to the inlet channels and of the deposited PM. Simulations revealed that following a rapid shift to idle the highest regeneration temperature in a DPF fed by a cone exceeded that in one not fed by a cone and it may exceed the cordierite DPF melting temperature (1200 °C). Moreover, it may generate transient radial and axial temperature gradients several times higher than under stationary regeneration that may crack the cordierite DPF. The increase in the temperature gradient is especially large in the axial direction. One of the surprising findings is that the highest temperature attained following a step change to idle is not a monotonic function of the initial PM loading. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300948c
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11355–11366[article] Inlet cone effect on diesel particulate filter regeneration upon a rapid shift to idle [texte imprimé] / Mengting Yu, Auteur ; Dan Luss, Auteur . - 2012 . - pp. 11355–11366.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11355–11366
Mots-clés : Diesel engine Résumé : The particulate matter (PM) emitted by a diesel engine is collected and then burned in a diesel particulate filter (DPF). A major technological challenge in the operation of the ceramic, often cordierite, filter is that a rapid shift to idle may create a local hot region with a temperature much higher than under stationary feed conditions. This excessive transient temperature rise may cause local melting or cracking of the ceramic filter. Almost all previous studies of temperature excursions during the DPF regeneration (combustion of the deposited PM) were of cases in which equal exhaust flow rate was fed to all the parallel inlet channels. The diesel engine exhaust pipe is sometimes connected to the DPF by a wide-angled cone (diffuser). This leads to a mal-distribution of the flow rate to the inlet channels and of the deposited PM. Simulations revealed that following a rapid shift to idle the highest regeneration temperature in a DPF fed by a cone exceeded that in one not fed by a cone and it may exceed the cordierite DPF melting temperature (1200 °C). Moreover, it may generate transient radial and axial temperature gradients several times higher than under stationary regeneration that may crack the cordierite DPF. The increase in the temperature gradient is especially large in the axial direction. One of the surprising findings is that the highest temperature attained following a step change to idle is not a monotonic function of the initial PM loading. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300948c Exemplaires
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Titre : Intermediary products in the catalytic wet air oxidation of crystal violet with Ni / MgAlO as catalyst Type de document : texte imprimé Auteurs : Gabriel Ovejero, Auteur ; Araceli Rodríguez, Auteur ; Ana Vallet, Auteur Année de publication : 2012 Article en page(s) : pp. 11367-11372 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalyst Oxidation Wet air Catalytic reaction Résumé : In this study, the performance of Ni supported on MgAlO catalyst to promote Oxidation of crystal violet was investigated. Oxidation experiments were carried out at T = 140―200 °C and total pressures up to 50 bar. The catalyst was prepared by incipient wetness impregnation to obtain catalyst with metal loading of 7 wt %. A detailed reaction network for the wet air oxidation and catalytic wet air oxidation of crystal ciolet on Ni/MgAlO catalyst is proposed in this study. The reaction network proposed takes into account all the detected intermediate products during the dye oxidation. This work represents the first determination of the reaction network of this compound in wet air and catalytic wet air oxidation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324785
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11367-11372[article] Intermediary products in the catalytic wet air oxidation of crystal violet with Ni / MgAlO as catalyst [texte imprimé] / Gabriel Ovejero, Auteur ; Araceli Rodríguez, Auteur ; Ana Vallet, Auteur . - 2012 . - pp. 11367-11372.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11367-11372
Mots-clés : Catalyst Oxidation Wet air Catalytic reaction Résumé : In this study, the performance of Ni supported on MgAlO catalyst to promote Oxidation of crystal violet was investigated. Oxidation experiments were carried out at T = 140―200 °C and total pressures up to 50 bar. The catalyst was prepared by incipient wetness impregnation to obtain catalyst with metal loading of 7 wt %. A detailed reaction network for the wet air oxidation and catalytic wet air oxidation of crystal ciolet on Ni/MgAlO catalyst is proposed in this study. The reaction network proposed takes into account all the detected intermediate products during the dye oxidation. This work represents the first determination of the reaction network of this compound in wet air and catalytic wet air oxidation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324785 Exemplaires
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Titre : Formulation of poorly water - soluble compound loaded solid lipid nanoparticles in a microchannel system fabricated by mechanical microcutting method : Puerarin as a model drug Type de document : texte imprimé Auteurs : Linhong Xu, Auteur ; Xu Tan, Auteur ; Junxian Yun, Auteur Année de publication : 2012 Article en page(s) : pp. 11373–11380 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Nanoparticles Microchannel Microcutting method Résumé : Delivery of poorly water-soluble compounds by use of nanosized lipid carriers has attracted much attention in pharmaceutical and therapeutic areas in recent years. However, it is difficult to formulate poorly water-soluble compound loaded lipid nanoparticles with narrow size distributions and proper drug load properties. In the present work, we introduce a precise mechanical manufacture method, the microcutting approach, to fabricate a microchannel system on a stainless steel slab, which was then assembled and employed to prepare poorly water-soluble drug loaded solid lipid nanoparticles (SLNs) by liquid flow-focusing and gas displacing techniques. A poorly water-soluble drug, puerarin, was used as the model drug, and the production of puerarin-loaded SLNs was achieved under various conditions. Particle size distribution of the obtained drug-loaded SLNs was measured by dynamic light scattering (DLS), and the particle morphology was observed by transmission electron microscopy (TEM). The state of the drug-loaded SLNs was analyzed by differential scanning calorimetry (DSC), and the drug load was determined by high-performance liquid chromatography (HPLC). The results showed that microchannels fabricated by the present mechanical microcutting method were excellent in surface quality and precise in channel sizes and shapes, which are easily scaled-up. The puerarin-loaded SLNs prepared by the present microchannel system have a narrow size distribution and the mean particle size varied with the velocities of fluids and the lipid concentration. The drug load capacity of puerarin was influenced by preparation parameters, like the flow velocities of liquids and the concentrations of lipid and puerarin. Therefore, by employing suitable preparation parameters, one can produce poorly water-soluble drug loaded SLNs with expected sizes and drug load capacities by use of microchannels fabricated by the microcutting method, which could be an effective and alternative approach for scale-up production of those new nanosized delivery systems containing poorly water-soluble drugs for potential pharmaceutical and therapeutic applications. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300592u
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11373–11380[article] Formulation of poorly water - soluble compound loaded solid lipid nanoparticles in a microchannel system fabricated by mechanical microcutting method : Puerarin as a model drug [texte imprimé] / Linhong Xu, Auteur ; Xu Tan, Auteur ; Junxian Yun, Auteur . - 2012 . - pp. 11373–11380.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11373–11380
Mots-clés : Nanoparticles Microchannel Microcutting method Résumé : Delivery of poorly water-soluble compounds by use of nanosized lipid carriers has attracted much attention in pharmaceutical and therapeutic areas in recent years. However, it is difficult to formulate poorly water-soluble compound loaded lipid nanoparticles with narrow size distributions and proper drug load properties. In the present work, we introduce a precise mechanical manufacture method, the microcutting approach, to fabricate a microchannel system on a stainless steel slab, which was then assembled and employed to prepare poorly water-soluble drug loaded solid lipid nanoparticles (SLNs) by liquid flow-focusing and gas displacing techniques. A poorly water-soluble drug, puerarin, was used as the model drug, and the production of puerarin-loaded SLNs was achieved under various conditions. Particle size distribution of the obtained drug-loaded SLNs was measured by dynamic light scattering (DLS), and the particle morphology was observed by transmission electron microscopy (TEM). The state of the drug-loaded SLNs was analyzed by differential scanning calorimetry (DSC), and the drug load was determined by high-performance liquid chromatography (HPLC). The results showed that microchannels fabricated by the present mechanical microcutting method were excellent in surface quality and precise in channel sizes and shapes, which are easily scaled-up. The puerarin-loaded SLNs prepared by the present microchannel system have a narrow size distribution and the mean particle size varied with the velocities of fluids and the lipid concentration. The drug load capacity of puerarin was influenced by preparation parameters, like the flow velocities of liquids and the concentrations of lipid and puerarin. Therefore, by employing suitable preparation parameters, one can produce poorly water-soluble drug loaded SLNs with expected sizes and drug load capacities by use of microchannels fabricated by the microcutting method, which could be an effective and alternative approach for scale-up production of those new nanosized delivery systems containing poorly water-soluble drugs for potential pharmaceutical and therapeutic applications. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300592u Exemplaires
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Titre : Dynamic modeling of the reactive twin - screw corotating extrusion process : Experimental validation by using inlet glass fibers injection response and application to polymers degassing Type de document : texte imprimé Auteurs : T. Goma-Bilongo, Auteur ; F. Couenne, Auteur ; C. Jallut, Auteur Année de publication : 2012 Article en page(s) : pp. 11381-11388 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Degassing Glass fiber Extrusion Modeling Dynamic model Résumé : In this Article is described an original dynamic model of a reactive corotating twin-screw extrusion (TSE) process operated by the Rhodia Co. for the Nylon-66 degassing finishing step. To validate the model, dynamic experiments have been performed on a small-scale pilot plant. These experiments consist of a temporary injection of glass fibers at the inlet of the extruder after it has reached a given operating point. The outlet glass fibers mass fraction time variation is then measured. This experiment does not lead to the RTD measurement. As a matter of fact, due to the high quantity of glass fibers that is introduced, the behavior of the flow through the extruder is perturbed so that the glass fibers cannot be considered as an inert tracer. The dynamic model that we have published elsewhere (Choulak et al. Ind. Eng. Chem. Res. 2004, 43, 7373-7382) is adapted to take into account this nonlinear behavior of the extruder with respect to the glass fibers injection and is favorably compared to experimental results. The description of the degassing operation is also included in the model. The model allows simulations of the complete dynamic behavior of the process. When the steady state is reached, the good position of the degassing vent with respect to the partially and fully filled zones positions can also be checked, thus illustrating the way the model can be used for design purposes. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324787
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11381-11388[article] Dynamic modeling of the reactive twin - screw corotating extrusion process : Experimental validation by using inlet glass fibers injection response and application to polymers degassing [texte imprimé] / T. Goma-Bilongo, Auteur ; F. Couenne, Auteur ; C. Jallut, Auteur . - 2012 . - pp. 11381-11388.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11381-11388
Mots-clés : Degassing Glass fiber Extrusion Modeling Dynamic model Résumé : In this Article is described an original dynamic model of a reactive corotating twin-screw extrusion (TSE) process operated by the Rhodia Co. for the Nylon-66 degassing finishing step. To validate the model, dynamic experiments have been performed on a small-scale pilot plant. These experiments consist of a temporary injection of glass fibers at the inlet of the extruder after it has reached a given operating point. The outlet glass fibers mass fraction time variation is then measured. This experiment does not lead to the RTD measurement. As a matter of fact, due to the high quantity of glass fibers that is introduced, the behavior of the flow through the extruder is perturbed so that the glass fibers cannot be considered as an inert tracer. The dynamic model that we have published elsewhere (Choulak et al. Ind. Eng. Chem. Res. 2004, 43, 7373-7382) is adapted to take into account this nonlinear behavior of the extruder with respect to the glass fibers injection and is favorably compared to experimental results. The description of the degassing operation is also included in the model. The model allows simulations of the complete dynamic behavior of the process. When the steady state is reached, the good position of the degassing vent with respect to the partially and fully filled zones positions can also be checked, thus illustrating the way the model can be used for design purposes. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324787 Exemplaires
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Titre : Cellulase adsorption and reactivity on a cellulose surface from flow ellipsometry Type de document : texte imprimé Auteurs : S. A. Maurer, Auteur ; C. N. Bedbrook, Auteur ; C. J. Radke, Auteur Année de publication : 2012 Article en page(s) : pp. 11389–11400 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Adsorption Ellipsometry Résumé : Enzymatic deconstruction of cellulose occurs at the aqueous/cellulose interface. Most assays to explore cellulase activity, however, are performed in bulk solution and, hence, fail to elucidate surface-reaction kinetics. We use flow ellipsometry to quantify the adsorption and surface reactivity of aqueous cellulase on a model cellulose film substrate. The rate of cellulose digestion at the aqueous/solid interface increases with increasing bulk concentration of enzyme, but only up to a plateau corresponding to the maximum adsorption density of cellulase. Kinetic data are analyzed according to a modified Langmuir–Michaelis–Menten framework including both reversible adsorption of cellulase to the cellulose surface and complexation of surface cellulose chains with adsorbed cellulase. At ambient temperature, the molar turnover number is 0.57 ± 0.08 s–1, commensurate with literature values, and the Langmuir adsorption equilibrium constant, characterizing the binding strength of the cellulase, is 0.086 ± 0.026 ppm–1. The rate-determining step in the surface-reaction sequence is complexation of adsorbed cellulase with the solid-cellulose surface. Simultaneous knowledge of sorption and digestion kinetics is necessary to quantify cellulose deconstruction. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3008538
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11389–11400[article] Cellulase adsorption and reactivity on a cellulose surface from flow ellipsometry [texte imprimé] / S. A. Maurer, Auteur ; C. N. Bedbrook, Auteur ; C. J. Radke, Auteur . - 2012 . - pp. 11389–11400.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11389–11400
Mots-clés : Adsorption Ellipsometry Résumé : Enzymatic deconstruction of cellulose occurs at the aqueous/cellulose interface. Most assays to explore cellulase activity, however, are performed in bulk solution and, hence, fail to elucidate surface-reaction kinetics. We use flow ellipsometry to quantify the adsorption and surface reactivity of aqueous cellulase on a model cellulose film substrate. The rate of cellulose digestion at the aqueous/solid interface increases with increasing bulk concentration of enzyme, but only up to a plateau corresponding to the maximum adsorption density of cellulase. Kinetic data are analyzed according to a modified Langmuir–Michaelis–Menten framework including both reversible adsorption of cellulase to the cellulose surface and complexation of surface cellulose chains with adsorbed cellulase. At ambient temperature, the molar turnover number is 0.57 ± 0.08 s–1, commensurate with literature values, and the Langmuir adsorption equilibrium constant, characterizing the binding strength of the cellulase, is 0.086 ± 0.026 ppm–1. The rate-determining step in the surface-reaction sequence is complexation of adsorbed cellulase with the solid-cellulose surface. Simultaneous knowledge of sorption and digestion kinetics is necessary to quantify cellulose deconstruction. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3008538 Exemplaires
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Titre : Synthesis of cross - linked, partially neutralized poly (Acrylic Acid) by suspension polymerization in supercritical carbon dioxide Type de document : texte imprimé Auteurs : Yazan A. Hussain, Auteur ; Tao Liu, Auteur ; George W. Roberts, Auteur Année de publication : 2012 Article en page(s) : pp. 11401-11408 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Supercritical state Carbon dioxide Suspension polymerization Résumé : A novel process for producing superabsorbent polymer of cross-linked, partially neutralized poly(acrylic acid) via suspension polymerization in supercritical carbon dioxide was developed. The process utilized siloxane-based surfactants as suspension stabilizers to produce particles with acceptable size range for commercial applications. The behavior of the suspension mixture and its relation to the final product morphology is discussed. The product performance in terms of water absorbency is presented. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324789
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11401-11408[article] Synthesis of cross - linked, partially neutralized poly (Acrylic Acid) by suspension polymerization in supercritical carbon dioxide [texte imprimé] / Yazan A. Hussain, Auteur ; Tao Liu, Auteur ; George W. Roberts, Auteur . - 2012 . - pp. 11401-11408.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11401-11408
Mots-clés : Supercritical state Carbon dioxide Suspension polymerization Résumé : A novel process for producing superabsorbent polymer of cross-linked, partially neutralized poly(acrylic acid) via suspension polymerization in supercritical carbon dioxide was developed. The process utilized siloxane-based surfactants as suspension stabilizers to produce particles with acceptable size range for commercial applications. The behavior of the suspension mixture and its relation to the final product morphology is discussed. The product performance in terms of water absorbency is presented. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324789 Exemplaires
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Titre : Statistical prediction of product quality in batch processes with limited batch - cycle data Type de document : texte imprimé Auteurs : Zhiqiang Ge, Auteur ; Zhihuan Song, Auteur ; Furong Gao, Auteur Année de publication : 2012 Article en page(s) : pp. 11409-11416 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Batchwise Prediction Résumé : This paper develops a modeling approach to address the end-of-batch product quality prediction problem for batch processes with limited batch-cycle data. Generally, those batch processes that have multiple phases are the focus of the present paper. Different from the traditional multiway/phase-based partial least-squares (PLS) method, which unfolds the three-way data set through the batch direction, the proposed method unfolds the data set through the variable direction, in order to generate more training data samples. Reproducing the product quality data with the noise injection method allows a statistical model to be developed in each phase of the batch process. This, however, does not remove the nonlinearity of the batch process data, as practically addressed by the typical batch normalization. Therefore, a nonlinear regression model is subsequently introduced to handle this problem for product quality prediction modeling. To compare the performance of linear and nonlinear statistical models, phase-based PLS and relevance vector machine models have both been developed for prediction of product quality in an industrial injection molding process. En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324790
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11409-11416[article] Statistical prediction of product quality in batch processes with limited batch - cycle data [texte imprimé] / Zhiqiang Ge, Auteur ; Zhihuan Song, Auteur ; Furong Gao, Auteur . - 2012 . - pp. 11409-11416.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11409-11416
Mots-clés : Batchwise Prediction Résumé : This paper develops a modeling approach to address the end-of-batch product quality prediction problem for batch processes with limited batch-cycle data. Generally, those batch processes that have multiple phases are the focus of the present paper. Different from the traditional multiway/phase-based partial least-squares (PLS) method, which unfolds the three-way data set through the batch direction, the proposed method unfolds the data set through the variable direction, in order to generate more training data samples. Reproducing the product quality data with the noise injection method allows a statistical model to be developed in each phase of the batch process. This, however, does not remove the nonlinearity of the batch process data, as practically addressed by the typical batch normalization. Therefore, a nonlinear regression model is subsequently introduced to handle this problem for product quality prediction modeling. To compare the performance of linear and nonlinear statistical models, phase-based PLS and relevance vector machine models have both been developed for prediction of product quality in an industrial injection molding process. En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324790 Exemplaires
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Titre : Mixed integer linear programming formulation for aiding planning activities in a complex pipeline network Type de document : texte imprimé Auteurs : Sergio L. Stebel, Auteur ; Suelen N. B. Magatao, Auteur ; Lucia V. R. Arruda, Auteur Année de publication : 2012 Article en page(s) : pp. 11417-11433 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Mathematical programming Pipeline network Planning Mixed integer Linear Résumé : This paper presents an optimization model to reduce the gap between planning and scheduling activities in pipeline networks for supply of petroleum derivatives, so as to effectively operate the plans developed at higher decision levels. Most of the information taken in the petroleum supply chain is unidirectional, from the strategic level passing through the tactical level and finally reaching the operational level. However, unviable schedules are often obtained from an operational standpoint, since operational criteria are not considered when decisions are made at the strategic and tactical levels. In particular, in the supply chain of refined petroleum products, the production campaigns of the refineries are defined for different regions based on the consumer market and no operational conditions related to distribution are accounted at this stage. This fact that may lead to operational infeasibilities. To overcome this type of problem the present paper proposes a Mixed Integer Linear Programming (MILP) approach to validate the refineries' production plans where operational conditions are accounted for, and as a consequence, a decrease in the existent gap between the scheduled and executed operations is obtained. The proposed methodology is applied to a real world case study of a Brazilian Oil company. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324791
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11417-11433[article] Mixed integer linear programming formulation for aiding planning activities in a complex pipeline network [texte imprimé] / Sergio L. Stebel, Auteur ; Suelen N. B. Magatao, Auteur ; Lucia V. R. Arruda, Auteur . - 2012 . - pp. 11417-11433.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11417-11433
Mots-clés : Mathematical programming Pipeline network Planning Mixed integer Linear Résumé : This paper presents an optimization model to reduce the gap between planning and scheduling activities in pipeline networks for supply of petroleum derivatives, so as to effectively operate the plans developed at higher decision levels. Most of the information taken in the petroleum supply chain is unidirectional, from the strategic level passing through the tactical level and finally reaching the operational level. However, unviable schedules are often obtained from an operational standpoint, since operational criteria are not considered when decisions are made at the strategic and tactical levels. In particular, in the supply chain of refined petroleum products, the production campaigns of the refineries are defined for different regions based on the consumer market and no operational conditions related to distribution are accounted at this stage. This fact that may lead to operational infeasibilities. To overcome this type of problem the present paper proposes a Mixed Integer Linear Programming (MILP) approach to validate the refineries' production plans where operational conditions are accounted for, and as a consequence, a decrease in the existent gap between the scheduled and executed operations is obtained. The proposed methodology is applied to a real world case study of a Brazilian Oil company. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324791 Exemplaires
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Titre : Technology Integration for Sustainable Manufacturing : An Applied Study on Integrated Profitable Pollution Prevention in Surface Finishing Systems Type de document : texte imprimé Auteurs : Jie Xiao, Auteur ; Yinlun Huang, Auteur Année de publication : 2012 Article en page(s) : pp. 11434-11444 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Pollution prevention Manufacturing Résumé : Technology improvement and innovation are of utmost importance in achieving greenness while ensuring economic incentives in manufacturing. Aiming at Profitable Pollution Prevention (P3), design and operation technologies can be developed to enhance manufacturing sustainability through energy and material efficiency increment, source waste reduction, production efficiency improvement, safety assurance, etc. This paper explores opportunities for an effective integration of P3-oriented technologies in a systematic way. It will be shown that the integrated P3 (IP3) technology can be identified through a technology implementation approach based on process fundamentals and engineering practicability needed for process design modification and operational strategy development. A successful application of an IP3 technology in an electroplating process, a main type of surface finishing system, demonstrates the methodological efficacy. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324792
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11434-11444[article] Technology Integration for Sustainable Manufacturing : An Applied Study on Integrated Profitable Pollution Prevention in Surface Finishing Systems [texte imprimé] / Jie Xiao, Auteur ; Yinlun Huang, Auteur . - 2012 . - pp. 11434-11444.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11434-11444
Mots-clés : Pollution prevention Manufacturing Résumé : Technology improvement and innovation are of utmost importance in achieving greenness while ensuring economic incentives in manufacturing. Aiming at Profitable Pollution Prevention (P3), design and operation technologies can be developed to enhance manufacturing sustainability through energy and material efficiency increment, source waste reduction, production efficiency improvement, safety assurance, etc. This paper explores opportunities for an effective integration of P3-oriented technologies in a systematic way. It will be shown that the integrated P3 (IP3) technology can be identified through a technology implementation approach based on process fundamentals and engineering practicability needed for process design modification and operational strategy development. A successful application of an IP3 technology in an electroplating process, a main type of surface finishing system, demonstrates the methodological efficacy. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324792 Exemplaires
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Titre : Multiperiod stochastic optimization model for carbon capture and storage infrastructure under uncertainty in CO2 emissions, product prices, and operating costs Type de document : texte imprimé Auteurs : Jee-Hoon Han, Auteur ; In-Beum Lee, Auteur Année de publication : 2012 Article en page(s) : pp. 11445-11457 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Carbon dioxide Uncertainty Storage Modeling Optimization Résumé : A multiperiod stochastic programming model is developed for planning a carbon capture and storage (CCS) infrastructure including CO2 utilization and disposal in an uncertain environment and with a time-varying investment environment. An inexact two-stage stochastic programming approach is used to analyze the effect of possible uncertainties in product prices, operating costs, and CO2 emissions. The proposed model determines where and how much CO2 to capture, store, transport, utilize, or sequester for the purpose of maximizing the total profit of handling the uncertainty while meeting the CO2 mitigation target during each time period of a given planning interval. The capability of the proposed model to provide correct decisions despite a changing uncertain environment is tested by applying it to designing and operating the future CCS infrastructure on the eastern coast of Korea over a 20-year planning interval (2011―2030). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324793
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11445-11457[article] Multiperiod stochastic optimization model for carbon capture and storage infrastructure under uncertainty in CO2 emissions, product prices, and operating costs [texte imprimé] / Jee-Hoon Han, Auteur ; In-Beum Lee, Auteur . - 2012 . - pp. 11445-11457.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11445-11457
Mots-clés : Carbon dioxide Uncertainty Storage Modeling Optimization Résumé : A multiperiod stochastic programming model is developed for planning a carbon capture and storage (CCS) infrastructure including CO2 utilization and disposal in an uncertain environment and with a time-varying investment environment. An inexact two-stage stochastic programming approach is used to analyze the effect of possible uncertainties in product prices, operating costs, and CO2 emissions. The proposed model determines where and how much CO2 to capture, store, transport, utilize, or sequester for the purpose of maximizing the total profit of handling the uncertainty while meeting the CO2 mitigation target during each time period of a given planning interval. The capability of the proposed model to provide correct decisions despite a changing uncertain environment is tested by applying it to designing and operating the future CCS infrastructure on the eastern coast of Korea over a 20-year planning interval (2011―2030). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324793 Exemplaires
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Titre : New fraction jetting model for distillation sieve tray efficiency prediction Type de document : texte imprimé Auteurs : Anand N. Vennavelli, Auteur ; James R. Whiteley, Auteur ; Michael R. Resetarits, Auteur Année de publication : 2012 Article en page(s) : pp. 11458-11462 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Prediction Plate column efficiency Perforated tray Distillation Modeling Résumé : The two phases on distillation trays can function in several different regimes depending on the physical properties of the system and the liquid-to-vapor ratio. Predicting the fraction of the vapor transported as jets, or fraction jetting, on a tray operating in the mixed-froth regime can bridge froth and spray regime models, explain the gradual changes in tray efficiency during the froth-spray transition, and eliminate the need to predict the froth-spray transition point when separate froth and spray regime models are used. Fraction jetting models will also facilitate multiregime models, such as the Syeda et al. (Chem. Eng. Res. Dev. 2007, 85, 269-277) sieve tray efficiency model, that are valid for both froth and spray regimes. Current fraction jetting models are empirical and developed from limited data. In this paper, the concept of fraction jetting on a sieve tray is discussed and a new semiempirical model is presented. The fraction jetting model was developed using the existing data of Raper et al. (Chem. Eng. Sci. 1982, 37, 501―506) and no new data were generated. Furthermore, the applicability of the fraction jetting model to tray efficiency models that incorporate jetting is demonstrated using the Syeda et al. sieve tray efficiency model. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324794
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11458-11462[article] New fraction jetting model for distillation sieve tray efficiency prediction [texte imprimé] / Anand N. Vennavelli, Auteur ; James R. Whiteley, Auteur ; Michael R. Resetarits, Auteur . - 2012 . - pp. 11458-11462.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11458-11462
Mots-clés : Prediction Plate column efficiency Perforated tray Distillation Modeling Résumé : The two phases on distillation trays can function in several different regimes depending on the physical properties of the system and the liquid-to-vapor ratio. Predicting the fraction of the vapor transported as jets, or fraction jetting, on a tray operating in the mixed-froth regime can bridge froth and spray regime models, explain the gradual changes in tray efficiency during the froth-spray transition, and eliminate the need to predict the froth-spray transition point when separate froth and spray regime models are used. Fraction jetting models will also facilitate multiregime models, such as the Syeda et al. (Chem. Eng. Res. Dev. 2007, 85, 269-277) sieve tray efficiency model, that are valid for both froth and spray regimes. Current fraction jetting models are empirical and developed from limited data. In this paper, the concept of fraction jetting on a sieve tray is discussed and a new semiempirical model is presented. The fraction jetting model was developed using the existing data of Raper et al. (Chem. Eng. Sci. 1982, 37, 501―506) and no new data were generated. Furthermore, the applicability of the fraction jetting model to tray efficiency models that incorporate jetting is demonstrated using the Syeda et al. sieve tray efficiency model. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324794 Exemplaires
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Titre : Investigation of shell side heat transfer in cross - flow designed vacuum membrane distillation module Type de document : texte imprimé Auteurs : Bingwei Qi, Auteur ; Baoan Li, Auteur ; Shichang Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 11463-11472 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Membrane separation distillation Design Crossflow Heat transfer Résumé : This paper focuses on the investigation of heat transfer in a cross-flow designed vacuum membrane distillation (VMD) module. The employment of cross-flow membrane module could ensure significant reduction of temperature polarization effect at a relatively low range of Reynolds numbers. According to most literature on VMD, the heat transfer coefficients are usually estimated by the commonly used correlations for nonporous and rigid heat exchangers. However, due to the complex flow regime in module channel, the applicability of these formulas is questioned. In this work, the heat transfer in the shell side of VMD module was studied numerically and experimentally in the Reynolds range from 7.12 to 52.18. The experimental Nusselt numbers obtained in this work are relatively higher than those predicted in the literature for given conditions. The possible reasons leading to the considerable enhancement of heat transfer are analyzed and discussed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324795
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11463-11472[article] Investigation of shell side heat transfer in cross - flow designed vacuum membrane distillation module [texte imprimé] / Bingwei Qi, Auteur ; Baoan Li, Auteur ; Shichang Wang, Auteur . - 2012 . - pp. 11463-11472.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11463-11472
Mots-clés : Membrane separation distillation Design Crossflow Heat transfer Résumé : This paper focuses on the investigation of heat transfer in a cross-flow designed vacuum membrane distillation (VMD) module. The employment of cross-flow membrane module could ensure significant reduction of temperature polarization effect at a relatively low range of Reynolds numbers. According to most literature on VMD, the heat transfer coefficients are usually estimated by the commonly used correlations for nonporous and rigid heat exchangers. However, due to the complex flow regime in module channel, the applicability of these formulas is questioned. In this work, the heat transfer in the shell side of VMD module was studied numerically and experimentally in the Reynolds range from 7.12 to 52.18. The experimental Nusselt numbers obtained in this work are relatively higher than those predicted in the literature for given conditions. The possible reasons leading to the considerable enhancement of heat transfer are analyzed and discussed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324795 Exemplaires
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Titre : Removal and recovery of organic solvents from aqueous waste mixtures by extractive and pressure swing distillation Type de document : texte imprimé Auteurs : G. Modla, Auteur ; P. Lang, Auteur Année de publication : 2012 Article en page(s) : pp. 11473-11481 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Distillation Waste water Organic solvent Résumé : Different scenarios for handling wastewaters of different concentrations containing acetone and methanol (in equimolar quantities) in order to remove and/or recover organic components are investigated by rigorous simulation. The extractive and pressure swing distillation processes are optimized by genetic algorithm (GA). The different alternatives including incineration of the whole amount of waste are compared on the basis of the capital, operation, and total annual costs. The influence of the water content of the waste mixture is also investigated. The best results are obtained with the separation of the whole quantity of the waste mixture into specified purity products by extractive distillation. The results obtained for pressure swing distillation with heat integration remained only slightly under those of the extractive distillation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324796
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11473-11481[article] Removal and recovery of organic solvents from aqueous waste mixtures by extractive and pressure swing distillation [texte imprimé] / G. Modla, Auteur ; P. Lang, Auteur . - 2012 . - pp. 11473-11481.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11473-11481
Mots-clés : Distillation Waste water Organic solvent Résumé : Different scenarios for handling wastewaters of different concentrations containing acetone and methanol (in equimolar quantities) in order to remove and/or recover organic components are investigated by rigorous simulation. The extractive and pressure swing distillation processes are optimized by genetic algorithm (GA). The different alternatives including incineration of the whole amount of waste are compared on the basis of the capital, operation, and total annual costs. The influence of the water content of the waste mixture is also investigated. The best results are obtained with the separation of the whole quantity of the waste mixture into specified purity products by extractive distillation. The results obtained for pressure swing distillation with heat integration remained only slightly under those of the extractive distillation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324796 Exemplaires
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Titre : Integration of enzymatic catalysts in a reactive distillation column with structured packings Type de document : texte imprimé Auteurs : Rene Heils, Auteur ; Annika Sont, Auteur ; Paul Bubenheim, Auteur Année de publication : 2012 Article en page(s) : pp. 11482-11489 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ordered packing Distillation column with reactionEnzymatic catalysis Résumé : The integrated process setup of reaction and separation in reactive distillation can be favorable for enzyme-catalyzed reactions that are often equilibrium-limited and/or inhibited by the product of the reaction. However, until now, no appropriate way has described the implementation of the enzymes into distillation columns. In this work, a special type of biocatalytic coating for commercially available structured packings was developed to enable enzymatic reactions in reactive distillation columns. Lipase CALB was immobilized within the silica-gel based coating and showed high long-term stability, i.e., the coatings can be stored for at least 50 days at room temperature without any significant loss of enzyme activity. In addition, the silica-gel coatings were stable in organic media and at increased temperatures. Reactive distillation experiments were carried out in a batch reactive distillation setup comprising of structured A3-500 packings from Montz (Hilden, Germany) coated with the catalytic silica gel. Stepwise removal of the low boiling point product from the distillate shifted the equilibrium to the product side and increased the conversion of the reactants from 60% to 98%, in comparison with the corresponding setup in a standard batch reactor. The stability of the silica-gel coating and loss of the enzyme was investigated during the distillation runs. Overall, the integration of an enzymatic reaction into a reactive distillation column offers new possibilities for the application of biocatalysts in organic synthesis. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324797
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11482-11489[article] Integration of enzymatic catalysts in a reactive distillation column with structured packings [texte imprimé] / Rene Heils, Auteur ; Annika Sont, Auteur ; Paul Bubenheim, Auteur . - 2012 . - pp. 11482-11489.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11482-11489
Mots-clés : Ordered packing Distillation column with reactionEnzymatic catalysis Résumé : The integrated process setup of reaction and separation in reactive distillation can be favorable for enzyme-catalyzed reactions that are often equilibrium-limited and/or inhibited by the product of the reaction. However, until now, no appropriate way has described the implementation of the enzymes into distillation columns. In this work, a special type of biocatalytic coating for commercially available structured packings was developed to enable enzymatic reactions in reactive distillation columns. Lipase CALB was immobilized within the silica-gel based coating and showed high long-term stability, i.e., the coatings can be stored for at least 50 days at room temperature without any significant loss of enzyme activity. In addition, the silica-gel coatings were stable in organic media and at increased temperatures. Reactive distillation experiments were carried out in a batch reactive distillation setup comprising of structured A3-500 packings from Montz (Hilden, Germany) coated with the catalytic silica gel. Stepwise removal of the low boiling point product from the distillate shifted the equilibrium to the product side and increased the conversion of the reactants from 60% to 98%, in comparison with the corresponding setup in a standard batch reactor. The stability of the silica-gel coating and loss of the enzyme was investigated during the distillation runs. Overall, the integration of an enzymatic reaction into a reactive distillation column offers new possibilities for the application of biocatalysts in organic synthesis. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324797 Exemplaires
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Titre : Synthesis of li – al layered double hydroxides (LDHs) for efficient fluoride removal Type de document : texte imprimé Auteurs : Tao, Zhang, Auteur ; Qiurong Li, Auteur ; Haiyan Xiao, Auteur Année de publication : 2012 Article en page(s) : pp. 11490-11498 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydroxides Résumé : A novel adsorbent of Li–Al layered double hydroxides (LDHs) was prepared through the precipitation of metal nitrates and further applied to remove excessive fluoride ions from water. The physical and chemical properties of synthesized materials were examined by powder transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, N2 adsorption/desorption analysis, and thermogravimetric analysis (TGA). The TEM results indicated that the materials synthesized via coprecipitation present a preferential orientation of the nanoscale LDH platelets. The XRD analysis confirmed that the synthesized products have a highly crystalline nature and a well-ordered layer structure. The high specific surface areas (37.24–51.27 m2/g) of calcined products were demonstrated to be beneficial for the adsorption of fluoride. For the adsorption experiment, the effects of the adsorption conditions including pH, coanions and adsorbent dose were investigated at initial fluoride concentration of 20 mg/L. The kinetics and isotherms of fluoride adsorption by calcined Li–Al LDHs were studied. The results indicated that the Li–Al LDHs can be effectively used to remove fluoride from water, where the maximum percentage removal (97.36%) could be reached and the adsorption equilibrium could be attained within 1 h. The kinetic data were well-fitted to the pseudo-second-order model, while the Freündlich isotherm model provided the better correlation of the equilibrium data. Based on FT-IR and kinetic analysis, the “memory effect” may play an important role in the early adsorption stage, while the ion-exchange process may control the adsorption rate at the second adsorption stage. Since the Li–Al LDHs show excellent fluoride removal efficiency, they are expected to separate fluoride from water in pollution control. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300863x
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11490-11498[article] Synthesis of li – al layered double hydroxides (LDHs) for efficient fluoride removal [texte imprimé] / Tao, Zhang, Auteur ; Qiurong Li, Auteur ; Haiyan Xiao, Auteur . - 2012 . - pp. 11490-11498.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11490-11498
Mots-clés : Hydroxides Résumé : A novel adsorbent of Li–Al layered double hydroxides (LDHs) was prepared through the precipitation of metal nitrates and further applied to remove excessive fluoride ions from water. The physical and chemical properties of synthesized materials were examined by powder transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, N2 adsorption/desorption analysis, and thermogravimetric analysis (TGA). The TEM results indicated that the materials synthesized via coprecipitation present a preferential orientation of the nanoscale LDH platelets. The XRD analysis confirmed that the synthesized products have a highly crystalline nature and a well-ordered layer structure. The high specific surface areas (37.24–51.27 m2/g) of calcined products were demonstrated to be beneficial for the adsorption of fluoride. For the adsorption experiment, the effects of the adsorption conditions including pH, coanions and adsorbent dose were investigated at initial fluoride concentration of 20 mg/L. The kinetics and isotherms of fluoride adsorption by calcined Li–Al LDHs were studied. The results indicated that the Li–Al LDHs can be effectively used to remove fluoride from water, where the maximum percentage removal (97.36%) could be reached and the adsorption equilibrium could be attained within 1 h. The kinetic data were well-fitted to the pseudo-second-order model, while the Freündlich isotherm model provided the better correlation of the equilibrium data. Based on FT-IR and kinetic analysis, the “memory effect” may play an important role in the early adsorption stage, while the ion-exchange process may control the adsorption rate at the second adsorption stage. Since the Li–Al LDHs show excellent fluoride removal efficiency, they are expected to separate fluoride from water in pollution control. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300863x Exemplaires
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Titre : Synthesis of a silicalite zeolite membrane in ultradilute solution and its highly selective separation of organic / water mixtures Type de document : texte imprimé Auteurs : Xiao-Liang Zhang, Auteur ; Mei-Hua Zhu, Auteur ; Rong-Fei Zhou, Auteur Année de publication : 2012 Article en page(s) : pp. 11499-11508 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Zeolite Inorganic membrane Résumé : A continuous intergrown silicalite zeolite membrane with high pervaporation (PV) performance was successfully prepared on seeded tubular mullite supports in ultradilute solution with a H2O/SiO2 ratio of 800 and an inexpensive template of tetrapropylammonium bromide (TPABr) instead of tetrapropylammonium hydroxide (TPAOH). Several parameters were systematically investigated to evaluate their influence on crystallization and PV performance of the membranes, including the H2O/SiO2 ratio, template type, alkalinity, synthesis temperature, crystallization time, and silica source. The X-ray diffraction (XRD), scanning electron microscopy (SEM), and PV tests were used to characterize the as-synthesized membranes. The crystal growth and separation quality of the silicalite membranes were very sensitive to the H2O/SiO2 ratio and alkalinity in the precursor solution and synthesis temperature. Under the optimized synthesis conditions, the outer surface of support was fully covered with well-intergrown silicalite zeolite layer to form the zeolite membrane. For silicalite membrane prepared with the typical molar composition of synthesis solutions of ISiO2/0.1TPABr/0.2TPAOH/800H2O at 180 °C for 16 h, the flux and separation factor are achieved to 1.91 kg·m―2·h―1 and 66 for a 5 wt % ethanol/water mixture at 60 °C, respectively. Moreover, the membrane prepared with pure TPABr template instead of TPAOH in ultradilute solution also showed the high PV performance with the flux of 1.77 kg·m―2·h―1 and separation factor of 63 under the same tests conditions. Due to the utilization of ultradilute precursor and cheap organic template to prepare the silicalite membrane on cheap mullite supports with high PV performance, the present developed technique could reduce the chemical consumption and decrease the costs of membrane toward an organic/water mixture separation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324799
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11499-11508[article] Synthesis of a silicalite zeolite membrane in ultradilute solution and its highly selective separation of organic / water mixtures [texte imprimé] / Xiao-Liang Zhang, Auteur ; Mei-Hua Zhu, Auteur ; Rong-Fei Zhou, Auteur . - 2012 . - pp. 11499-11508.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11499-11508
Mots-clés : Zeolite Inorganic membrane Résumé : A continuous intergrown silicalite zeolite membrane with high pervaporation (PV) performance was successfully prepared on seeded tubular mullite supports in ultradilute solution with a H2O/SiO2 ratio of 800 and an inexpensive template of tetrapropylammonium bromide (TPABr) instead of tetrapropylammonium hydroxide (TPAOH). Several parameters were systematically investigated to evaluate their influence on crystallization and PV performance of the membranes, including the H2O/SiO2 ratio, template type, alkalinity, synthesis temperature, crystallization time, and silica source. The X-ray diffraction (XRD), scanning electron microscopy (SEM), and PV tests were used to characterize the as-synthesized membranes. The crystal growth and separation quality of the silicalite membranes were very sensitive to the H2O/SiO2 ratio and alkalinity in the precursor solution and synthesis temperature. Under the optimized synthesis conditions, the outer surface of support was fully covered with well-intergrown silicalite zeolite layer to form the zeolite membrane. For silicalite membrane prepared with the typical molar composition of synthesis solutions of ISiO2/0.1TPABr/0.2TPAOH/800H2O at 180 °C for 16 h, the flux and separation factor are achieved to 1.91 kg·m―2·h―1 and 66 for a 5 wt % ethanol/water mixture at 60 °C, respectively. Moreover, the membrane prepared with pure TPABr template instead of TPAOH in ultradilute solution also showed the high PV performance with the flux of 1.77 kg·m―2·h―1 and separation factor of 63 under the same tests conditions. Due to the utilization of ultradilute precursor and cheap organic template to prepare the silicalite membrane on cheap mullite supports with high PV performance, the present developed technique could reduce the chemical consumption and decrease the costs of membrane toward an organic/water mixture separation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324799 Exemplaires
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Titre : Measurement of ass transfer rates in adsorbents : New combined - technique frequency response apparatus and application to CO2 in 13X zeolite Type de document : texte imprimé Auteurs : Timothy J. Giesy, Auteur ; Yu Wang, Auteur ; M. Douglas LeVan, Auteur Année de publication : 2012 Article en page(s) : pp. 11509–11517 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Mass transfer Adsorbents Résumé : A new combined-technique frequency response apparatus has been developed for studying mass transfer in porous adsorbents. This new apparatus can perform pressure-swing, volume-swing, and concentration-swing frequency response experiments, enabling it to investigate mass transfer of pure components and binary gas mixtures in adsorbents over a wide frequency range. To demonstrate the capabilities of the apparatus, pressure-swing and volume-swing frequency response experiments were performed in tandem to study transport of pure CO2 in 13X zeolite beads over the frequency range from 10–4 Hz to 10 Hz at pressures from 0.125 to 1 bar. Frequency response spectra show that transport in this system is governed by a nonisothermal macropore diffusion resistance with diffusion occurring by a Knudsen-type mechanism. Macropore diffusion control is confirmed by the existence of particle size dependence of the system’s dynamic response. In smaller zeolite particles, the macropore diffusion resistance is lower, and macropore diffusion becomes less important to the system response. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3014204
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11509–11517[article] Measurement of ass transfer rates in adsorbents : New combined - technique frequency response apparatus and application to CO2 in 13X zeolite [texte imprimé] / Timothy J. Giesy, Auteur ; Yu Wang, Auteur ; M. Douglas LeVan, Auteur . - 2012 . - pp. 11509–11517.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11509–11517
Mots-clés : Mass transfer Adsorbents Résumé : A new combined-technique frequency response apparatus has been developed for studying mass transfer in porous adsorbents. This new apparatus can perform pressure-swing, volume-swing, and concentration-swing frequency response experiments, enabling it to investigate mass transfer of pure components and binary gas mixtures in adsorbents over a wide frequency range. To demonstrate the capabilities of the apparatus, pressure-swing and volume-swing frequency response experiments were performed in tandem to study transport of pure CO2 in 13X zeolite beads over the frequency range from 10–4 Hz to 10 Hz at pressures from 0.125 to 1 bar. Frequency response spectra show that transport in this system is governed by a nonisothermal macropore diffusion resistance with diffusion occurring by a Knudsen-type mechanism. Macropore diffusion control is confirmed by the existence of particle size dependence of the system’s dynamic response. In smaller zeolite particles, the macropore diffusion resistance is lower, and macropore diffusion becomes less important to the system response. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3014204 Exemplaires
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Titre : COSMO - RS - based ionic - liquid selection for extractive distillation processes Type de document : texte imprimé Auteurs : Juan Pablo Gutiérrez, Auteur ; Geert Wytze Meindersm, Auteur ; Andre B. de Haan, Auteur Année de publication : 2012 Article en page(s) : pp. 11518–11529 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ionic liquid Distillation processes Résumé : A solvent selection methodology for extractive distillation processes is applied to identify promising ionic liquid (IL) solvents for the following separation cases: methylcyclohexane/toluene, 1-hexene/n-hexane, and ethanol/water. Thermodynamic and phase stability analyses are done in order to understand the strong interactions between the solutes and ILs (solvents) and vice versa. The solvent preselection is done with COSMOtherm software (version C2.1, release 01.11a). Selectivities and activity coefficients at infinite dilution are predicted. Variations in the IL structure (in the cations and anions) and their effect on the solubility and selectivity are theoretically studied and experimentally confirmed. Suitable ILs are selected by experimentation at finite dilution (real solutions). A suitable IL for the separation of 1-hexene from n-hexane yielding a better performance than the conventional solvent N-methyl-2-pyrrolidone (NMP) was not found. Tetracyanoborate-based ILs seem to be promising solvents for the extractive distillation of toluene from methylcyclohexane as a replacement of the conventional solvent NMP. For the separation of ethanol from water, the ILs 1-ethyl-3-methyl-imidazolium acetate and 1-ethyl-3-methyl-imidazolium dicyanamide (due to its thermal stability) seem to be suitable candidates and possible replacements of ethylene glycol, which is used as a conventional solvent for the separation of this mixture. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301506n
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11518–11529[article] COSMO - RS - based ionic - liquid selection for extractive distillation processes [texte imprimé] / Juan Pablo Gutiérrez, Auteur ; Geert Wytze Meindersm, Auteur ; Andre B. de Haan, Auteur . - 2012 . - pp. 11518–11529.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11518–11529
Mots-clés : Ionic liquid Distillation processes Résumé : A solvent selection methodology for extractive distillation processes is applied to identify promising ionic liquid (IL) solvents for the following separation cases: methylcyclohexane/toluene, 1-hexene/n-hexane, and ethanol/water. Thermodynamic and phase stability analyses are done in order to understand the strong interactions between the solutes and ILs (solvents) and vice versa. The solvent preselection is done with COSMOtherm software (version C2.1, release 01.11a). Selectivities and activity coefficients at infinite dilution are predicted. Variations in the IL structure (in the cations and anions) and their effect on the solubility and selectivity are theoretically studied and experimentally confirmed. Suitable ILs are selected by experimentation at finite dilution (real solutions). A suitable IL for the separation of 1-hexene from n-hexane yielding a better performance than the conventional solvent N-methyl-2-pyrrolidone (NMP) was not found. Tetracyanoborate-based ILs seem to be promising solvents for the extractive distillation of toluene from methylcyclohexane as a replacement of the conventional solvent NMP. For the separation of ethanol from water, the ILs 1-ethyl-3-methyl-imidazolium acetate and 1-ethyl-3-methyl-imidazolium dicyanamide (due to its thermal stability) seem to be suitable candidates and possible replacements of ethylene glycol, which is used as a conventional solvent for the separation of this mixture. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301506n Exemplaires
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Titre : Synthesis and characterization of thiazolium - based room temperature ionic liquids for gas separations Type de document : texte imprimé Auteurs : Patrick C. Hillesheim, Auteur ; Shannon M. Mahurin, Auteur ; Pasquale F. Fulvio, Auteur Année de publication : 2012 Article en page(s) : pp. 11530-11537 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ionic liquid Résumé : A series of novel thiazolium-bis(triflamide) based ionic liquids has been synthesized and characterized. Physicochemical properties of the ionic liquids such as thermal stability, phase transitions, and infrared spectra were analyzed and compared to the imidazolium-based congeners. Several unique classes of ancillary substitutions are eramined with respect to impacts on overall structure, in addition to their carbon dioxide absorption properties in supported ionic-liquid membranes for gas separation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324802
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11530-11537[article] Synthesis and characterization of thiazolium - based room temperature ionic liquids for gas separations [texte imprimé] / Patrick C. Hillesheim, Auteur ; Shannon M. Mahurin, Auteur ; Pasquale F. Fulvio, Auteur . - 2012 . - pp. 11530-11537.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11530-11537
Mots-clés : Ionic liquid Résumé : A series of novel thiazolium-bis(triflamide) based ionic liquids has been synthesized and characterized. Physicochemical properties of the ionic liquids such as thermal stability, phase transitions, and infrared spectra were analyzed and compared to the imidazolium-based congeners. Several unique classes of ancillary substitutions are eramined with respect to impacts on overall structure, in addition to their carbon dioxide absorption properties in supported ionic-liquid membranes for gas separation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324802 Exemplaires
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Titre : Selective flotation of chalcopyrite and marmatite by MBT and electrochemical analysis Type de document : texte imprimé Auteurs : Wenqing Qin, Auteur ; Fen Jiao, Auteur ; Wei Sun, Auteur Année de publication : 2012 Article en page(s) : pp. 11538-11546 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Flotation Résumé : Various collectors were compared in the selective flotation of copper-zinc ore by using isopropyl ethylthionocarbamate (Z-200), buthl xanthate, ammonium dibutyl dithiophosphate, and mercapto benzothiazole (MBT). The latter showed effective selectivity in the flotation of chalcopyrite and marmatite and was selected for a detailed study by using cyclic voltammetry and Tafel. The results of microflotation pointed out that the flotation of marmatite was significantly affected by CuSO4 activation. At weakly alkaline pH, marmatite activated by Cu2+ is dependent on Cu2+ concentration shown in electrochemical tests, and the activation products were Cu2S and CuS. The increasing addition of Cu2+ may remove the hydroxide and S0, resulting in considerable activation. The corrosion of marmatite is accelerated with the addition of CuSO4. Mechanisms are suggested for the selectivity of chalcopyrite/marmatite by MBT: the hydrophilic hydroxides (Zn(OH)2 and Fe(OH)3) are formed on the marmatite surface, which renders the marmatite surface hydrophilic and hampers the reaction between MBT and marmatite-activated products, while the hydrophobic compounds (MBT)2 and Cu(MBT)2 formed on the chalcopyrite surface improve the flotability of chalcopyrite. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324803
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11538-11546[article] Selective flotation of chalcopyrite and marmatite by MBT and electrochemical analysis [texte imprimé] / Wenqing Qin, Auteur ; Fen Jiao, Auteur ; Wei Sun, Auteur . - 2012 . - pp. 11538-11546.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11538-11546
Mots-clés : Flotation Résumé : Various collectors were compared in the selective flotation of copper-zinc ore by using isopropyl ethylthionocarbamate (Z-200), buthl xanthate, ammonium dibutyl dithiophosphate, and mercapto benzothiazole (MBT). The latter showed effective selectivity in the flotation of chalcopyrite and marmatite and was selected for a detailed study by using cyclic voltammetry and Tafel. The results of microflotation pointed out that the flotation of marmatite was significantly affected by CuSO4 activation. At weakly alkaline pH, marmatite activated by Cu2+ is dependent on Cu2+ concentration shown in electrochemical tests, and the activation products were Cu2S and CuS. The increasing addition of Cu2+ may remove the hydroxide and S0, resulting in considerable activation. The corrosion of marmatite is accelerated with the addition of CuSO4. Mechanisms are suggested for the selectivity of chalcopyrite/marmatite by MBT: the hydrophilic hydroxides (Zn(OH)2 and Fe(OH)3) are formed on the marmatite surface, which renders the marmatite surface hydrophilic and hampers the reaction between MBT and marmatite-activated products, while the hydrophobic compounds (MBT)2 and Cu(MBT)2 formed on the chalcopyrite surface improve the flotability of chalcopyrite. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324803 Exemplaires
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Titre : Effect of weak preformed particle gel on unswept oil zones / areas during conformance control treatments Type de document : texte imprimé Auteurs : Mahmoud O. Elsharafi, Auteur ; Baojun Bai, Auteur Année de publication : 2012 Article en page(s) : pp. 11547-11554 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Oil zones Control treatments Résumé : Preformed particle gel (PPG) has been developed to reduce fluid channels through super-high-permeability streaks/fractures. This was done to decrease water production and improve sweep efficiency for mature oilfields. The success of a PPG treatment depends primarily on whether or not PPG can selectively penetrate into highly permeable channels or fractures while minimizing penetration into lower permeable, unswept zones/areas. The purpose of this work was to determine what factors influence the damage of PPG on low-permeable, unswept zones. A filtration apparatus was designed to determine the possible penetration of PPG into low-permeable sandstone rocks. Filtration curves (the relationship between injection times and filtration volume) were obtained, and the permeability of sandstone cores, both before and after PPG treatment, was measured to determine whether or not PPGs reduce the permeability of low-permeable rocks. A commercial superabsorbent polymer, LiquiBlock 40K gel, was used as a PPG sample for our filtration experiments. LiquiBlock 40K is a weak gel particle with an elastic module of 400 Pa at 0.05% of NaCl (wt %). The particle sizes of the gel ranged from 30 to 120 meshes. Filtration test results showed that 30–120 meshes of LiquiBlock 40K gel did not propagate in the cores with a permeability of ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3007227
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11547-11554[article] Effect of weak preformed particle gel on unswept oil zones / areas during conformance control treatments [texte imprimé] / Mahmoud O. Elsharafi, Auteur ; Baojun Bai, Auteur . - 2012 . - pp. 11547-11554.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11547-11554
Mots-clés : Oil zones Control treatments Résumé : Preformed particle gel (PPG) has been developed to reduce fluid channels through super-high-permeability streaks/fractures. This was done to decrease water production and improve sweep efficiency for mature oilfields. The success of a PPG treatment depends primarily on whether or not PPG can selectively penetrate into highly permeable channels or fractures while minimizing penetration into lower permeable, unswept zones/areas. The purpose of this work was to determine what factors influence the damage of PPG on low-permeable, unswept zones. A filtration apparatus was designed to determine the possible penetration of PPG into low-permeable sandstone rocks. Filtration curves (the relationship between injection times and filtration volume) were obtained, and the permeability of sandstone cores, both before and after PPG treatment, was measured to determine whether or not PPGs reduce the permeability of low-permeable rocks. A commercial superabsorbent polymer, LiquiBlock 40K gel, was used as a PPG sample for our filtration experiments. LiquiBlock 40K is a weak gel particle with an elastic module of 400 Pa at 0.05% of NaCl (wt %). The particle sizes of the gel ranged from 30 to 120 meshes. Filtration test results showed that 30–120 meshes of LiquiBlock 40K gel did not propagate in the cores with a permeability of ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3007227 Exemplaires
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Titre : Comparative rapid toxicity screening of commercial and potential “Green” plasticizers using bioluminescent bacteria Type de document : texte imprimé Auteurs : Pedro A. Segura, Auteur ; Pearl Kaplan, Auteur ; Hanno C. Erythropel, Auteur Année de publication : 2012 Article en page(s) : pp. 11555-11560 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Bacteria Plasticizer Toxicity Résumé : The Vibrio fischeri bioluminescence inhibition assay (Microtox) was slightly modified to use an in-house diluent containing 2% DMSO and was successfully applied to perform a rapid toxicity screening of 24 compounds including commercial plasticizers and chemicals currently studied as potential "green" plasticizers. Comparison of the EC50 values obtained indicated that 1,3-propanediol dibenzoate (PrDDB), 1,4-butanediol dibenzoate (BDDB), and dihexyl maleate (DHM) might not be good candidates as "green" plasticizers because of their higher toxicity (EC50 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324805
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11555-11560[article] Comparative rapid toxicity screening of commercial and potential “Green” plasticizers using bioluminescent bacteria [texte imprimé] / Pedro A. Segura, Auteur ; Pearl Kaplan, Auteur ; Hanno C. Erythropel, Auteur . - 2012 . - pp. 11555-11560.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11555-11560
Mots-clés : Bacteria Plasticizer Toxicity Résumé : The Vibrio fischeri bioluminescence inhibition assay (Microtox) was slightly modified to use an in-house diluent containing 2% DMSO and was successfully applied to perform a rapid toxicity screening of 24 compounds including commercial plasticizers and chemicals currently studied as potential "green" plasticizers. Comparison of the EC50 values obtained indicated that 1,3-propanediol dibenzoate (PrDDB), 1,4-butanediol dibenzoate (BDDB), and dihexyl maleate (DHM) might not be good candidates as "green" plasticizers because of their higher toxicity (EC50 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324805 Exemplaires
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Titre : Vapor – liquid – liquid equilibrium measurements and modeling of the Methanethiol + Methane + Water ternary system at 304, 334, and 364 K Type de document : texte imprimé Auteurs : Javeed A. Awan, Auteur ; Ioannis Tsivintzelis, Auteur ; Alain Valtz, Auteur Année de publication : 2012 Article en page(s) : pp. 11561–11564 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Equilibrium measurements Vapor liquid Résumé : New vapor–liquid–liquid equilibrium (VLLE) data for methanethiol (CH3SH) + methane (CH4) + water (H2O) have been obtained at three temperatures (304, 334, and 364 K) and pressures up to 9 MPa. A “static-analytical” method was used to perform all of the measurements. The objective was to provide experimental VLLE data for CH3SH with other natural gas contents at its crude form for which limited or no data are available in the open literature. Such kinds of data are required for the industrial modeling of sulfur emissions. It is observed from the experimental data that the solubility of CH4 in the aqueous and organic phases increases with an increase of the total system pressure and decreases with an increase of the temperature. However, the solubility of CH3SH in the aqueous and organic phases decreases slightly with an increase of the total system pressure and increases significantly with an increase of the temperature. The new VLLE data of this ternary system were compared with predictions of the cubic-plus-association equation of state. The model tends to underpredict the concentration of CH3SH in all phases, particularly the vapor phase. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300888d
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11561–11564[article] Vapor – liquid – liquid equilibrium measurements and modeling of the Methanethiol + Methane + Water ternary system at 304, 334, and 364 K [texte imprimé] / Javeed A. Awan, Auteur ; Ioannis Tsivintzelis, Auteur ; Alain Valtz, Auteur . - 2012 . - pp. 11561–11564.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11561–11564
Mots-clés : Equilibrium measurements Vapor liquid Résumé : New vapor–liquid–liquid equilibrium (VLLE) data for methanethiol (CH3SH) + methane (CH4) + water (H2O) have been obtained at three temperatures (304, 334, and 364 K) and pressures up to 9 MPa. A “static-analytical” method was used to perform all of the measurements. The objective was to provide experimental VLLE data for CH3SH with other natural gas contents at its crude form for which limited or no data are available in the open literature. Such kinds of data are required for the industrial modeling of sulfur emissions. It is observed from the experimental data that the solubility of CH4 in the aqueous and organic phases increases with an increase of the total system pressure and decreases with an increase of the temperature. However, the solubility of CH3SH in the aqueous and organic phases decreases slightly with an increase of the total system pressure and increases significantly with an increase of the temperature. The new VLLE data of this ternary system were compared with predictions of the cubic-plus-association equation of state. The model tends to underpredict the concentration of CH3SH in all phases, particularly the vapor phase. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300888d Exemplaires
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Titre : Release studies of thymol and p - cymene from polylactide microcapsules Type de document : texte imprimé Auteurs : Isabel M. Martins, Auteur ; Sofia N. Rodrigues, Auteur ; Maria F. Barreiro, Auteur Année de publication : 2012 Article en page(s) : pp. 11565-11571 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Microcapsule Résumé : The objective of this work is to access the release behavior of thymol and p-cymene used as model core materials with PLA microcapsules. The microcapsules were obtained by a coacervation process developed in a previous work and present a spherical shape with mean particle size of 25 and 37 μm for thymol and p-cymene, respectively. The results have shown that the release of thymol and p-cymene is faster in the first hour keeping almost constant in the subsequent days. The diffusion coefficient in the first hour of release was 1.99 × 10―16 m2/s for thymol and 4.34 × 10―16 m2/s for p-cymene. However, the diffusion was slower if considering a period of 5 days being the diffusion coefficients of 3.34 × 10―19 m2/s for thymol and 3.45 X 10―18 m2/s for cymene. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324807
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11565-11571[article] Release studies of thymol and p - cymene from polylactide microcapsules [texte imprimé] / Isabel M. Martins, Auteur ; Sofia N. Rodrigues, Auteur ; Maria F. Barreiro, Auteur . - 2012 . - pp. 11565-11571.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11565-11571
Mots-clés : Microcapsule Résumé : The objective of this work is to access the release behavior of thymol and p-cymene used as model core materials with PLA microcapsules. The microcapsules were obtained by a coacervation process developed in a previous work and present a spherical shape with mean particle size of 25 and 37 μm for thymol and p-cymene, respectively. The results have shown that the release of thymol and p-cymene is faster in the first hour keeping almost constant in the subsequent days. The diffusion coefficient in the first hour of release was 1.99 × 10―16 m2/s for thymol and 4.34 × 10―16 m2/s for p-cymene. However, the diffusion was slower if considering a period of 5 days being the diffusion coefficients of 3.34 × 10―19 m2/s for thymol and 3.45 X 10―18 m2/s for cymene. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324807 Exemplaires
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Titre : Computational study of the effects of material properties on heat transfer in gas fluidization Type de document : texte imprimé Auteurs : Qin-Fu Hou, Auteur ; Zong-Yan Zhou, Auteur ; Ai-Bing Yu, Auteur Année de publication : 2012 Article en page(s) : pp. 11572-11586 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Fluidization Heat transfer Properties of materials Résumé : Heat transfer characteristics of different powders in gas fluidization are investigated by means of a combined approach of discrete element method and computational fluid dynamics. First, the heat transfer characteristics in three flow regimes of group A powders are examined. Then, the effects of the Hamaker constant and particle size, both related to the van der Waals force, are investigated in detail. The results confirm that the convective heat transfer is dominant, and radiative heat transfer becomes important when the bed temperature is high. However, conductive heat transfer also plays a role depending on the flow regimes and material properties. Significant effects of the Hamaker constant and particle size are observed under certain conditions. Finally, an effort is made to quantify the effects of the Hamaker constant, particle size, and inlet gas velocity. The findings should be useful for better understanding and prediction of the heat transfer in gas fluidization. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324808
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11572-11586[article] Computational study of the effects of material properties on heat transfer in gas fluidization [texte imprimé] / Qin-Fu Hou, Auteur ; Zong-Yan Zhou, Auteur ; Ai-Bing Yu, Auteur . - 2012 . - pp. 11572-11586.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11572-11586
Mots-clés : Fluidization Heat transfer Properties of materials Résumé : Heat transfer characteristics of different powders in gas fluidization are investigated by means of a combined approach of discrete element method and computational fluid dynamics. First, the heat transfer characteristics in three flow regimes of group A powders are examined. Then, the effects of the Hamaker constant and particle size, both related to the van der Waals force, are investigated in detail. The results confirm that the convective heat transfer is dominant, and radiative heat transfer becomes important when the bed temperature is high. However, conductive heat transfer also plays a role depending on the flow regimes and material properties. Significant effects of the Hamaker constant and particle size are observed under certain conditions. Finally, an effort is made to quantify the effects of the Hamaker constant, particle size, and inlet gas velocity. The findings should be useful for better understanding and prediction of the heat transfer in gas fluidization. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324808 Exemplaires
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Titre : Comments on “mechanism and kinetics of sulfite oxidation in the presence of ethanol” : Corrected rate law for sulfite oxidation mechanism with ethanol inhibition Type de document : texte imprimé Auteurs : David A. Rockstraw, Auteur Année de publication : 2012 Article en page(s) : p. 11587 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Comments Mechanism Kinetics ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3014583
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - p. 11587[article] Comments on “mechanism and kinetics of sulfite oxidation in the presence of ethanol” : Corrected rate law for sulfite oxidation mechanism with ethanol inhibition [texte imprimé] / David A. Rockstraw, Auteur . - 2012 . - p. 11587.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - p. 11587
Mots-clés : Comments Mechanism Kinetics ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3014583 Exemplaires
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Titre : Discussion on the kinetics of sulfite oxidation inhibited by ethanol : A reply to “comments on ‘mechanism and kinetics of sulfite oxidation in the presence of ethanol’” Type de document : texte imprimé Auteurs : Li-Dong Wang, Auteur ; Yong-Liang Ma, Auteur ; Ji-Ming Hao, Auteur Année de publication : 2012 Article en page(s) : pp. 11588-11589 Note générale : Induistrial chemistry Langues : Anglais (eng) Mots-clés : Discussion Kinetics Oxidation ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301619e
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11588-11589[article] Discussion on the kinetics of sulfite oxidation inhibited by ethanol : A reply to “comments on ‘mechanism and kinetics of sulfite oxidation in the presence of ethanol’” [texte imprimé] / Li-Dong Wang, Auteur ; Yong-Liang Ma, Auteur ; Ji-Ming Hao, Auteur . - 2012 . - pp. 11588-11589.
Induistrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11588-11589
Mots-clés : Discussion Kinetics Oxidation ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301619e Exemplaires
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Titre : Correction to “analysis of membrane and adsorbent processes for warm syngas cleanup in integrated gasification combined - cycle power with CO2 capture and sequestration” Type de document : texte imprimé Auteurs : David J. Couling, Auteur ; Kshitij Prakash, Auteur ; William H. Green, Auteur Année de publication : 2012 Article en page(s) : pp. 11592–11592 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Correction Analysis membrane ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302162y
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11592–11592[article] Correction to “analysis of membrane and adsorbent processes for warm syngas cleanup in integrated gasification combined - cycle power with CO2 capture and sequestration” [texte imprimé] / David J. Couling, Auteur ; Kshitij Prakash, Auteur ; William H. Green, Auteur . - 2012 . - pp. 11592–11592.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11592–11592
Mots-clés : Correction Analysis membrane ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302162y Exemplaires
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