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Characterization of Ti-ZSM-5 prepared by isomorphous substitution of B-ZSM-5 with TiCl4 and its performance in the hydroxylation of phenol / Jian Gao in Industrial & engineering chemistry research, Vol. 49 N° 5 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2194–2199 Titre : Characterization of Ti-ZSM-5 prepared by isomorphous substitution of B-ZSM-5 with TiCl4 and its performance in the hydroxylation of phenol Type de document : texte imprimé Auteurs : Jian Gao, Auteur ; Liu, Min, Auteur ; Xiangsheng Wang, Auteur Année de publication : 2010 Article en page(s) : pp. 2194–2199 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Ti-ZSM-5;  B-ZSM-5;  Isomorphous  substitution Résumé : Ti-ZSM-5 has attracted much attention for its unique catalytic properties in selective oxidation. Isomorphous substitution is an alternative synthesis method to obtain Ti-ZSM-5 with low contents of extraframework Ti. However, the nature of the precursor also has a great influence on the catalytic performance of Ti-ZSM-5. In this work, two Ti-ZSM-5 samples were prepared by isomorphous substitution of precursor B-ZSM-5 zeolites with gaseous TiCl4. The effect of the nature of the B-ZSM-5 precursor obtained by different hydrothermal synthesis procedures on the catalytic performance was investigated through characterization by XRD; FT-IR, UV−vis, and UV−Raman spectroscopies; SEM; N2 adsorption; and phenol hydroxylation. The characterization results show that the two Ti-ZSM-5 samples synthesized by gas−solid isomorphous substitution of the B-ZSM-5 precursor contain very little anatase and have similar amounts of active sites. They consist of cuboidlike crystals with different sizes that are agglomerated into different sizes of spherelike particles. Phenol hydroxylation with dilute H2O2 showed that, because of the smaller crystal size of its cuboid particles, Ti-ZSM-5 synthesized with B-ZSM-5 as the precursor at lower crystallization temperature had better catalytic performance and better recyclability. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901360y [article] Characterization of Ti-ZSM-5 prepared by isomorphous substitution of B-ZSM-5 with TiCl4 and its performance in the hydroxylation of phenol [texte imprimé] / Jian Gao, Auteur ; Liu, Min, Auteur ; Xiangsheng Wang, Auteur . - 2010 . - pp. 2194–2199. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2194–2199 Mots-clés : Ti-ZSM-5;  B-ZSM-5;  Isomorphous  substitution Résumé : Ti-ZSM-5 has attracted much attention for its unique catalytic properties in selective oxidation. Isomorphous substitution is an alternative synthesis method to obtain Ti-ZSM-5 with low contents of extraframework Ti. However, the nature of the precursor also has a great influence on the catalytic performance of Ti-ZSM-5. In this work, two Ti-ZSM-5 samples were prepared by isomorphous substitution of precursor B-ZSM-5 zeolites with gaseous TiCl4. The effect of the nature of the B-ZSM-5 precursor obtained by different hydrothermal synthesis procedures on the catalytic performance was investigated through characterization by XRD; FT-IR, UV−vis, and UV−Raman spectroscopies; SEM; N2 adsorption; and phenol hydroxylation. The characterization results show that the two Ti-ZSM-5 samples synthesized by gas−solid isomorphous substitution of the B-ZSM-5 precursor contain very little anatase and have similar amounts of active sites. They consist of cuboidlike crystals with different sizes that are agglomerated into different sizes of spherelike particles. Phenol hydroxylation with dilute H2O2 showed that, because of the smaller crystal size of its cuboid particles, Ti-ZSM-5 synthesized with B-ZSM-5 as the precursor at lower crystallization temperature had better catalytic performance and better recyclability. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901360y

Integral identification of continuous-time delay systems in the presence of unknown initial conditions and disturbances from step tests / Qing-Guo Wang in Industrial & engineering chemistry research, Vol. 47 n°14 (Juillet 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4929–4936 Titre : Integral identification of continuous-time delay systems in the presence of unknown initial conditions and disturbances from step tests Type de document : texte imprimé Auteurs : Qing-Guo Wang, Auteur ; Liu, Min, Auteur ; Chang Chieh Hang, Auteur Année de publication : 2008 Article en page(s) : p. 4929–4936 Langues : Anglais (eng) Mots-clés : Continuous-time  delay  systems  --  integral  identification  method;  Static  disturbance Résumé : In this paper, an integral identification method is proposed for continuous-time delay systems in presence of both unknown initial conditions and static disturbances from a step test. The integration limits are specifically chosen to make the resulting integral equation independent of the unknown initial conditions. This enables identification of the process model from a step test by one-stage least-squares algorithm without any iteration. The proposed identification method is demonstrated through numerical simulation and real time testing. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071532s [article] Integral identification of continuous-time delay systems in the presence of unknown initial conditions and disturbances from step tests [texte imprimé] / Qing-Guo Wang, Auteur ; Liu, Min, Auteur ; Chang Chieh Hang, Auteur . - 2008 . - p. 4929–4936. Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4929–4936 Mots-clés : Continuous-time  delay  systems  --  integral  identification  method;  Static  disturbance Résumé : In this paper, an integral identification method is proposed for continuous-time delay systems in presence of both unknown initial conditions and static disturbances from a step test. The integration limits are specifically chosen to make the resulting integral equation independent of the unknown initial conditions. This enables identification of the process model from a step test by one-stage least-squares algorithm without any iteration. The proposed identification method is demonstrated through numerical simulation and real time testing. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071532s

Numerical investigations on internal temperature distribution and refrigeration performance of reciprocating active magnetic regenerator of room temperature magnetic refrigeration / Liu, Min in International journal of refrigeration, Vol. 34 N° 3 (Mai 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 617-627 Titre : Numerical investigations on internal temperature distribution and refrigeration performance of reciprocating active magnetic regenerator of room temperature magnetic refrigeration Titre original : Etudes numériques sur la distribution de la température interne et la performance du régénérateur actif magnétique alternatif dans le froid magnétique à température ambiante Type de document : texte imprimé Auteurs : Liu, Min, Auteur ; Bingfeng Yu, Auteur Année de publication : 2011 Article en page(s) : pp. 617-627 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Magnetic  refrigerator  Refrigeration  Porous  medium  Temperature  Simulation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A two-dimension porous medium model for a reciprocating active magnetic regenerator (AMR) of room temperature magnetic refrigeration has been developed. The thermal diffusion effect, heat flux boundary effect and variable fluid physical properties are considered in the model. In the paper, we compare the numerical results of the porous medium model with the experimental data and the calculation results of one-dimension Schumann model to validate our model. Our model can simulate the operation of the reciprocating AMR effectively. With the present model, the internal heat exchange between the two phases is numerically investigated. The two dimensional temperature distributions of the magnetic refrigerant and the refrigeration performance of AMR are obtained, and the influence of the heat flux boundary effect and the variable fluid properties on them is discussed. AMR can achieve a maximum refrigeration capacity of 293.7 W with a corresponding coefficient of performance (COP) of 5.4. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071000277X [article] Numerical investigations on internal temperature distribution and refrigeration performance of reciprocating active magnetic regenerator of room temperature magnetic refrigeration = Etudes numériques sur la distribution de la température interne et la performance du régénérateur actif magnétique alternatif dans le froid magnétique à température ambiante [texte imprimé] / Liu, Min, Auteur ; Bingfeng Yu, Auteur . - 2011 . - pp. 617-627. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 617-627 Mots-clés : Magnetic  refrigerator  Refrigeration  Porous  medium  Temperature  Simulation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A two-dimension porous medium model for a reciprocating active magnetic regenerator (AMR) of room temperature magnetic refrigeration has been developed. The thermal diffusion effect, heat flux boundary effect and variable fluid physical properties are considered in the model. In the paper, we compare the numerical results of the porous medium model with the experimental data and the calculation results of one-dimension Schumann model to validate our model. Our model can simulate the operation of the reciprocating AMR effectively. With the present model, the internal heat exchange between the two phases is numerically investigated. The two dimensional temperature distributions of the magnetic refrigerant and the refrigeration performance of AMR are obtained, and the influence of the heat flux boundary effect and the variable fluid properties on them is discussed. AMR can achieve a maximum refrigeration capacity of 293.7 W with a corresponding coefficient of performance (COP) of 5.4. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071000277X

A review of magnetic refrigerator and heat pump prototypes built before the year 2010 / Bingfeng Yu in International journal of refrigeration, Vol. 33 N° 6 (Septembre 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 6 (Septembre 2010) . - pp. 1029-1060 Titre : A review of magnetic refrigerator and heat pump prototypes built before the year 2010 Titre original : Prototypes de réfrigérateurs et de pompes à chaleur magnétiques réalisés avant l'an 2010 Type de document : texte imprimé Auteurs : Bingfeng Yu, Auteur ; Liu, Min, Auteur ; Peter W. Egolf, Auteur Année de publication : 2010 Article en page(s) : pp. 1029-1060 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Magnetic  refrigerator  Heat  pump  Review  History Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Magnetic refrigeration, heating and power conversion technologies are interesting alternatives to the conventional refrigeration, heat pumping and different conventional energy conversion technologies. At present they all show a realistic potential to enter conventional markets, respectively to be applied in a few years. In this review paper, mainly magnetic refrigeration and magnetic heating are addressed and from these two technologies the main part is dedicated to magnetic refrigeration at room temperature. This article covers the demand of giving a complete list and description of existing magnetic heating and cooling prototypes up to the year 2010. Forty-one machines, their components and operation principles are presented in detail. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000721 [article] A review of magnetic refrigerator and heat pump prototypes built before the year 2010 = Prototypes de réfrigérateurs et de pompes à chaleur magnétiques réalisés avant l'an 2010 [texte imprimé] / Bingfeng Yu, Auteur ; Liu, Min, Auteur ; Peter W. Egolf, Auteur . - 2010 . - pp. 1029-1060. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 6 (Septembre 2010) . - pp. 1029-1060 Mots-clés : Magnetic  refrigerator  Heat  pump  Review  History Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Magnetic refrigeration, heating and power conversion technologies are interesting alternatives to the conventional refrigeration, heat pumping and different conventional energy conversion technologies. At present they all show a realistic potential to enter conventional markets, respectively to be applied in a few years. In this review paper, mainly magnetic refrigeration and magnetic heating are addressed and from these two technologies the main part is dedicated to magnetic refrigeration at room temperature. This article covers the demand of giving a complete list and description of existing magnetic heating and cooling prototypes up to the year 2010. Forty-one machines, their components and operation principles are presented in detail. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000721

Role of acidity in the ethylation of coking benzene with ethanol over nanosized HZSM-5 / Sun, Linping in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 506–514 Titre : Role of acidity in the ethylation of coking benzene with ethanol over nanosized HZSM-5 Type de document : texte imprimé Auteurs : Sun, Linping, Auteur ; Xinwen Guo, Auteur ; Liu, Min, Auteur Année de publication : 2010 Article en page(s) : pp 506–514 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ethylation  Zeolites  Thermogravimetry  Dimethylpyridine. Résumé : Ethylation of coking benzene, the product of coke oven gas, with ethanol over nanosized HZSM-5 zeolites poisoned by 2,6-dimethylpyridine has been investigated in a fixed-bed reactor. Pyridine infrared (Py-IR), amonia temperature programmed desorption (NH3-TPD), thermogravimetry (TG), acidity titration with a Hammett indicator, and cyclohexane and n-hexane adsorption were used to characterize the changes in acidity and porosity of the nanosized HZSM-5 zeolites poisoned by 2,6-dimethylpyridine. Conversion and product distribution depend strongly on the degree of catalyst poisoning. The acidity−activity correlation indicates that acid sites with pKa < −3.0 are responsible for the ethylation of coking benzene and sites with pKa < 2.27 are responsibly for the thiophene conversion. The remaining acid sites, which are not active for the ethylation of coking benzene over the poisoned sample, act as active centers for ethanol dehydration to ethylene. 2,6-Dimethylpyridine not only adsorbs on the strong Brnsted acid sites but blocks the zeolite channels over the poisoned sample. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901218j [article] Role of acidity in the ethylation of coking benzene with ethanol over nanosized HZSM-5 [texte imprimé] / Sun, Linping, Auteur ; Xinwen Guo, Auteur ; Liu, Min, Auteur . - 2010 . - pp 506–514. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 506–514 Mots-clés : Ethylation  Zeolites  Thermogravimetry  Dimethylpyridine. Résumé : Ethylation of coking benzene, the product of coke oven gas, with ethanol over nanosized HZSM-5 zeolites poisoned by 2,6-dimethylpyridine has been investigated in a fixed-bed reactor. Pyridine infrared (Py-IR), amonia temperature programmed desorption (NH3-TPD), thermogravimetry (TG), acidity titration with a Hammett indicator, and cyclohexane and n-hexane adsorption were used to characterize the changes in acidity and porosity of the nanosized HZSM-5 zeolites poisoned by 2,6-dimethylpyridine. Conversion and product distribution depend strongly on the degree of catalyst poisoning. The acidity−activity correlation indicates that acid sites with pKa < −3.0 are responsible for the ethylation of coking benzene and sites with pKa < 2.27 are responsibly for the thiophene conversion. The remaining acid sites, which are not active for the ethylation of coking benzene over the poisoned sample, act as active centers for ethanol dehydration to ethylene. 2,6-Dimethylpyridine not only adsorbs on the strong Brnsted acid sites but blocks the zeolite channels over the poisoned sample. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901218j

SO3H-functionalized ionic liquids for selective alkylation of p-cresol with tert-butanol / Xiumei Liu in Industrial & engineering chemistry research, Vol. 47 n°15 (Août 2008) 

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