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Comment on the “dynamic simulation of sorption enhanced reaction processes for biodiesel production” / Pedro Sa Gomes in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11854–11855 Titre : Comment on the “dynamic simulation of sorption enhanced reaction processes for biodiesel production” Type de document : texte imprimé Auteurs : Pedro Sa Gomes, Auteur ; Viviana M. T. M. Silva, Auteur ; Alirio E. Rodrigues, Auteur Année de publication : 2011 Article en page(s) : pp. 11854–11855 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Sorption  Dynamic DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100488j [article] Comment on the “dynamic simulation of sorption enhanced reaction processes for biodiesel production” [texte imprimé] / Pedro Sa Gomes, Auteur ; Viviana M. T. M. Silva, Auteur ; Alirio E. Rodrigues, Auteur . - 2011 . - pp. 11854–11855. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11854–11855 Mots-clés : Sorption  Dynamic DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100488j

Comments on “demonstration of a process for the conversion of kraft lignin into vanillin and Methyl vanillate by acidic oxidation in aqueous methanol” / Alirio E. Rodrigues in Industrial & engineering chemistry research, Vol. 49 N° 7 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3500–3500 Titre : Comments on “demonstration of a process for the conversion of kraft lignin into vanillin and Methyl vanillate by acidic oxidation in aqueous methanol” Type de document : texte imprimé Auteurs : Alirio E. Rodrigues, Auteur Année de publication : 2010 Article en page(s) : pp. 3500–3500 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Demonstration  Kraft  Lignin  Vanillin  and  Methyl  Vanillate  Acidic  Oxidation  in  Aqueous  Methanol ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100120x [article] Comments on “demonstration of a process for the conversion of kraft lignin into vanillin and Methyl vanillate by acidic oxidation in aqueous methanol” [texte imprimé] / Alirio E. Rodrigues, Auteur . - 2010 . - pp. 3500–3500. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3500–3500 Mots-clés : Demonstration  Kraft  Lignin  Vanillin  and  Methyl  Vanillate  Acidic  Oxidation  in  Aqueous  Methanol ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100120x

Experimental and theoretical study of chemical equilibria in the reactive systems of acetals synthesis / Viviana M. T. M. Silva in Industrial & engineering chemistry research, Vol. 51 N° 39 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 39 (Octobre 2012) . - pp. 12723-12729 Titre : Experimental and theoretical study of chemical equilibria in the reactive systems of acetals synthesis Type de document : texte imprimé Auteurs : Viviana M. T. M. Silva, Auteur ; Carla S. M. Pereira, Auteur ; Alirio E. Rodrigues, Auteur Année de publication : 2012 Article en page(s) : pp. 12723-12729 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Chemical  equilibrium Résumé : The chemical equilibria of acetals of acetaldehyde reactive systems (with methanol, ethanol, and n-butanol to form 1,1-dimethoxyethane, 1,1-diethoxyethane, and 1,1-dibuthoxyethane, respectively) were studied in the temperature range (293-333 K) in the liquid phase. The three reactive systems exhibit a strong nonideal behavior in the liquid phase. The knowledge of the activity coefficients is required to obtain the thermodynamic equilibrium constants Ka. The activity coefficients were estimated by the modified UNIFAC method, which already includes the parameters for the acetal group. The reaction enthalpies for the three acetalizations in the liquid phase were obtained from the temperature dependences of the corresponding thermodynamic equilibrium constants. These values were compared to those obtained by high-level ab initio calculations of the reaction participants using the Gaussian 03 program package. Absolute electronic energy values of the molecules have been obtained using G3(MP2) level. Using these results, calculated equilibrium constants and enthalpies of reaction of the acetals synthesis in the liquid phase based on the principles of statistical thermodynamics are found to be in acceptable agreement with the data obtained from the thermochemical measurements. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26419227 [article] Experimental and theoretical study of chemical equilibria in the reactive systems of acetals synthesis [texte imprimé] / Viviana M. T. M. Silva, Auteur ; Carla S. M. Pereira, Auteur ; Alirio E. Rodrigues, Auteur . - 2012 . - pp. 12723-12729. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 39 (Octobre 2012) . - pp. 12723-12729 Mots-clés : Chemical  equilibrium Résumé : The chemical equilibria of acetals of acetaldehyde reactive systems (with methanol, ethanol, and n-butanol to form 1,1-dimethoxyethane, 1,1-diethoxyethane, and 1,1-dibuthoxyethane, respectively) were studied in the temperature range (293-333 K) in the liquid phase. The three reactive systems exhibit a strong nonideal behavior in the liquid phase. The knowledge of the activity coefficients is required to obtain the thermodynamic equilibrium constants Ka. The activity coefficients were estimated by the modified UNIFAC method, which already includes the parameters for the acetal group. The reaction enthalpies for the three acetalizations in the liquid phase were obtained from the temperature dependences of the corresponding thermodynamic equilibrium constants. These values were compared to those obtained by high-level ab initio calculations of the reaction participants using the Gaussian 03 program package. Absolute electronic energy values of the molecules have been obtained using G3(MP2) level. Using these results, calculated equilibrium constants and enthalpies of reaction of the acetals synthesis in the liquid phase based on the principles of statistical thermodynamics are found to be in acceptable agreement with the data obtained from the thermochemical measurements. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26419227

Green fuel production using the permSMBR technology / Carla S. M. Pereira in Industrial & engineering chemistry research, Vol. 51 N° 26 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 8928–8938 Titre : Green fuel production using the permSMBR technology Type de document : texte imprimé Auteurs : Carla S. M. Pereira, Auteur ; Viviana M. T. M. Silva, Auteur ; Alirio E. Rodrigues, Auteur Année de publication : 2012 Article en page(s) : pp. 8928–8938 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Green  fuel Résumé : The production of the green fuel acetaldehyde dibutylacetal (1,1-dibutoxyethane, DBE) was implemented by means of a new hybrid technology, the Simulated Moving Bed Membrane Reactor (PermSMBR), which consists in a Simulated Moving Bed Reactor (SMBR) integrated with membranes. The PermSMBR and SMBR processes performances were numerically evaluated and compared. The new hybrid technology proved to be a very efficient process for DBE production, leading to a productivity of 70.77 kgDBE·Lresin-1·day-1 with a desorbent consumption of 0.33 Ln-Butanol/kgDBE, which corresponds to a productivity enhancement of 31% and a desorbent consumption reduction of 88% when compared with the SMBR technology. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201951d [article] Green fuel production using the permSMBR technology [texte imprimé] / Carla S. M. Pereira, Auteur ; Viviana M. T. M. Silva, Auteur ; Alirio E. Rodrigues, Auteur . - 2012 . - pp. 8928–8938. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 8928–8938 Mots-clés : Green  fuel Résumé : The production of the green fuel acetaldehyde dibutylacetal (1,1-dibutoxyethane, DBE) was implemented by means of a new hybrid technology, the Simulated Moving Bed Membrane Reactor (PermSMBR), which consists in a Simulated Moving Bed Reactor (SMBR) integrated with membranes. The PermSMBR and SMBR processes performances were numerically evaluated and compared. The new hybrid technology proved to be a very efficient process for DBE production, leading to a productivity of 70.77 kgDBE·Lresin-1·day-1 with a desorbent consumption of 0.33 Ln-Butanol/kgDBE, which corresponds to a productivity enhancement of 31% and a desorbent consumption reduction of 88% when compared with the SMBR technology. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201951d

Hydrogen production via sorption enhanced steam methane reforming process using Ni / CaO multifunctional catalyst / Naruewan Chanburanasiri in Industrial & engineering chemistry research, Vol. 50 N° 24 (Décembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13662-13671 Titre : Hydrogen production via sorption enhanced steam methane reforming process using Ni / CaO multifunctional catalyst Type de document : texte imprimé Auteurs : Naruewan Chanburanasiri, Auteur ; Ana M. Ribeiro, Auteur ; Alirio E. Rodrigues, Auteur Année de publication : 2012 Article en page(s) : pp. 13662-13671 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalyst  Reforming  Water  vapor  Sorption  Hydrogen  production Résumé : Sorption enhanced steam methane reforming (SESMR) is a promising concept for hydrogen production. The in situ removal of CO2 shifts the reaction equilibrium toward increased H2 production as well as H2 concentration. Generally, most of the previous studies operated the SESMR system using separate materials of a CO2 adsorbent and a reforming catalyst. In this study, a combined catalyst-adsorbent material (considered as multifunctional catalyst), whose functions are not only to catalyze the reaction but also to adsorb CO2 simultaneously, was developed and utilized for the SESMR process. CaO and hydrotalcite (MK30-K), well-known adsorbents for CO2 capture, were selected as supports to replace a conventional Al2O3 support for Ni catalyst. The material was prepared in the form of powder by incipient wetness technique, and the tests were carried out in the fixed bed reactor system. Experimental results indicated that the activity of Ni/CaO was less than Ni/Al2O3 but high hydrogen concentration in the product stream can be achieved. The effect of Ni loading was investigated, and it was found that at atmospheric pressure, steam to methane ratio of 3 and T = 873 K, 12.5 wt % Ni/CaO was the appropriate ratio, offering high hydrogen concentration (80%). The study also suggested that the use of the multifunctional catalyst eliminates the use of Al2O3 and thus requires a reactor with a smaller size. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299828 [article] Hydrogen production via sorption enhanced steam methane reforming process using Ni / CaO multifunctional catalyst [texte imprimé] / Naruewan Chanburanasiri, Auteur ; Ana M. Ribeiro, Auteur ; Alirio E. Rodrigues, Auteur . - 2012 . - pp. 13662-13671. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13662-13671 Mots-clés : Catalyst  Reforming  Water  vapor  Sorption  Hydrogen  production Résumé : Sorption enhanced steam methane reforming (SESMR) is a promising concept for hydrogen production. The in situ removal of CO2 shifts the reaction equilibrium toward increased H2 production as well as H2 concentration. Generally, most of the previous studies operated the SESMR system using separate materials of a CO2 adsorbent and a reforming catalyst. In this study, a combined catalyst-adsorbent material (considered as multifunctional catalyst), whose functions are not only to catalyze the reaction but also to adsorb CO2 simultaneously, was developed and utilized for the SESMR process. CaO and hydrotalcite (MK30-K), well-known adsorbents for CO2 capture, were selected as supports to replace a conventional Al2O3 support for Ni catalyst. The material was prepared in the form of powder by incipient wetness technique, and the tests were carried out in the fixed bed reactor system. Experimental results indicated that the activity of Ni/CaO was less than Ni/Al2O3 but high hydrogen concentration in the product stream can be achieved. The effect of Ni loading was investigated, and it was found that at atmospheric pressure, steam to methane ratio of 3 and T = 873 K, 12.5 wt % Ni/CaO was the appropriate ratio, offering high hydrogen concentration (80%). The study also suggested that the use of the multifunctional catalyst eliminates the use of Al2O3 and thus requires a reactor with a smaller size. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299828

Perfumery Radar: / Miguel A. Teixeira in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010) 

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Potential desorbents for propane/propylene separation by gas phase simulated moving bed / Miguel A. Granato in Industrial & engineering chemistry research, Vol. 49 N° 12 (Juin 2010) 

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