Documents disponibles écrits par cet auteur

Catalytic oxidative desulfurization of gasoline using ionic liquid emulsion system / Jianhua Ge 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. 13686-13692 Titre : Catalytic oxidative desulfurization of gasoline using ionic liquid emulsion system Type de document : texte imprimé Auteurs : Jianhua Ge, Auteur ; Yuming Zhou, Auteur ; Yong Yang, Auteur Année de publication : 2012 Article en page(s) : pp. 13686-13692 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Emulsion  Ionic  liquid  Desulfurization  Oxidation  Catalytic  reaction Résumé : With the aim of deep desulfurization of the gasoline, an amphiphilic catalyst, which is composed of lacunary anion [PW11O39]7- and quaternary ammonium cation [C18H37(CH3)3]N+, assembled in hydrophobic ionic liquid emulsions, can oxidize the sulfur compounds present in oil into their corresponding sulfones under ambient reaction conditions. In this process, catalytic oxidation of sulfur-containing molecules in model oil was investigated in detail under different reaction conditions (including different desulfurization systems, H2O2/DBT molar ratio, temperature, and various sulfur compounds). Moreover; this ionic liquid emulsion system could be recycled five times with an unnoticeable decrease in catalytic activity, and, from the kinetics study, it can be shown that the catalytic oxidative reaction is a pseudofirst-order reaction and the half-life is 30.4 min. Furthermore, the mechanism of catalytic oxidation desulfurization was elaborated, and the total sulfur level of real gasoline can be decreased from 1236 to 65 ppm after catalytic oxidation using an ionic liquid emulsion system. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299830 [article] Catalytic oxidative desulfurization of gasoline using ionic liquid emulsion system [texte imprimé] / Jianhua Ge, Auteur ; Yuming Zhou, Auteur ; Yong Yang, Auteur . - 2012 . - pp. 13686-13692. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13686-13692 Mots-clés : Emulsion  Ionic  liquid  Desulfurization  Oxidation  Catalytic  reaction Résumé : With the aim of deep desulfurization of the gasoline, an amphiphilic catalyst, which is composed of lacunary anion [PW11O39]7- and quaternary ammonium cation [C18H37(CH3)3]N+, assembled in hydrophobic ionic liquid emulsions, can oxidize the sulfur compounds present in oil into their corresponding sulfones under ambient reaction conditions. In this process, catalytic oxidation of sulfur-containing molecules in model oil was investigated in detail under different reaction conditions (including different desulfurization systems, H2O2/DBT molar ratio, temperature, and various sulfur compounds). Moreover; this ionic liquid emulsion system could be recycled five times with an unnoticeable decrease in catalytic activity, and, from the kinetics study, it can be shown that the catalytic oxidative reaction is a pseudofirst-order reaction and the half-life is 30.4 min. Furthermore, the mechanism of catalytic oxidation desulfurization was elaborated, and the total sulfur level of real gasoline can be decreased from 1236 to 65 ppm after catalytic oxidation using an ionic liquid emulsion system. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299830

Effect of magnesium addition to PtSnNa/ZSM-5 on the catalytic properties in the dehydrogenation of propane / Linyang Bai in Industrial & engineering chemistry research, Vol. 48 N° 22 (Novembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9885–9891 Titre : Effect of magnesium addition to PtSnNa/ZSM-5 on the catalytic properties in the dehydrogenation of propane Type de document : texte imprimé Auteurs : Linyang Bai, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur Année de publication : 2010 Article en page(s) : pp. 9885–9891 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Magnesium  addition  Propane  dehydrogenation Résumé : The effect of Mg addition to PtSnNa/ZSM-5 on the catalytic properties in propane dehydrogenation was investigated. The catalysts were characterized by using different techniques: XRD, BET, TEM, NH3-TPD, XPS, TPO, and TG-DTA. Results indicate that the presence of magnesium not only modifies the acid function and the structure of metallic phase but also diminishes carbon deposition on the catalyst. Among the catalysts studied, the PtSnNaMg(0.5%)/ZSM-5 exhibits the best performance in terms of propane conversion and stability. The high catalytic performance may be due to the strong interaction between Pt and Sn. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900534m [article] Effect of magnesium addition to PtSnNa/ZSM-5 on the catalytic properties in the dehydrogenation of propane [texte imprimé] / Linyang Bai, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur . - 2010 . - pp. 9885–9891. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9885–9891 Mots-clés : Magnesium  addition  Propane  dehydrogenation Résumé : The effect of Mg addition to PtSnNa/ZSM-5 on the catalytic properties in propane dehydrogenation was investigated. The catalysts were characterized by using different techniques: XRD, BET, TEM, NH3-TPD, XPS, TPO, and TG-DTA. Results indicate that the presence of magnesium not only modifies the acid function and the structure of metallic phase but also diminishes carbon deposition on the catalyst. Among the catalysts studied, the PtSnNaMg(0.5%)/ZSM-5 exhibits the best performance in terms of propane conversion and stability. The high catalytic performance may be due to the strong interaction between Pt and Sn. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900534m

Influence of Binder on the CatalyticperformaInfluence of binder on the catalytic nce of ptSnNa/ZSM-5 catalyst for propane dehydrogenation / Hui Liu in Industrial & engineering chemistry research, Vol. 47 n°21 (Novembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8142–8147 Titre : Influence of Binder on the CatalyticperformaInfluence of binder on the catalytic nce of ptSnNa/ZSM-5 catalyst for propane dehydrogenation Type de document : texte imprimé Auteurs : Hui Liu, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur Année de publication : 2008 Article en page(s) : p. 8142–8147 Note générale : Chemical engineering Langues : Anglais (eng) Résumé : The influence of different binders (alumina, silica sol, and montmorillonite) on the structure and performance of PtSnNa/ZSM-5 catalysts for propane dehydrogenation to propene was studied. Temperature-programmed desoption of ammonia (NH3-TPD), hydrogen chemisorption, BET surface area measurement, solid-state 27Al MAS NMR spectroscopy, catalyst particle mechanical strength, and X-ray diffraction (XRD) were used to characterize the catalysts. After agglomeration with different binders, the mechanical strength of all catalyst particles increased obviously in comparison with the nonagglomerated sample and the Al species amounts of the catalysts were affected greatly by the binder. A slightly acidic change was observed for the catalysts with different binders, but the metal dispersion on the carrier of different samples was clearly different. The result of propane dehydrogenation indicated that the catalyst based on PtSnNa/ZSM-5 agglomerated with alumina showed the highest conversion and high selectivity. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800693t [article] Influence of Binder on the CatalyticperformaInfluence of binder on the catalytic nce of ptSnNa/ZSM-5 catalyst for propane dehydrogenation [texte imprimé] / Hui Liu, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur . - 2008 . - p. 8142–8147. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8142–8147 Résumé : The influence of different binders (alumina, silica sol, and montmorillonite) on the structure and performance of PtSnNa/ZSM-5 catalysts for propane dehydrogenation to propene was studied. Temperature-programmed desoption of ammonia (NH3-TPD), hydrogen chemisorption, BET surface area measurement, solid-state 27Al MAS NMR spectroscopy, catalyst particle mechanical strength, and X-ray diffraction (XRD) were used to characterize the catalysts. After agglomeration with different binders, the mechanical strength of all catalyst particles increased obviously in comparison with the nonagglomerated sample and the Al species amounts of the catalysts were affected greatly by the binder. A slightly acidic change was observed for the catalysts with different binders, but the metal dispersion on the carrier of different samples was clearly different. The result of propane dehydrogenation indicated that the catalyst based on PtSnNa/ZSM-5 agglomerated with alumina showed the highest conversion and high selectivity. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800693t

Influence of lanthanum addition on catalytic properties of PtSnK/Al2O3 catalyst for isobutane dehydrogenation / Lihui Wan in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4280–4285 Titre : Influence of lanthanum addition on catalytic properties of PtSnK/Al2O3 catalyst for isobutane dehydrogenation Type de document : texte imprimé Auteurs : Lihui Wan, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 4280–4285 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalytic  properties Résumé : The effect of lanthanum addition on catalytic properties of PtSnK/Al2O3 catalyst for isobutane dehydrogenation was investigated. The catalysts were characterized by nitrogen adsorption, H2 chemisorption, XRF, XRD, XPS, TG, TPO, and NH3-TPD. Results showed that with the appropriate addition of lanthanum, the platinum dispersion increased, and carbon depositions decreased. The presence of La in the PtSnK/Al2O3 catalysts could not only strengthen the Sn−Al2O3 interaction, but also stabilize the oxidation states of Sn species, thus increasing the reaction activity and stability. Among the catalysts investigated, PtSnKLa(0.9 wt %)/Al2O3 had the best catalytic performance. After reaction for 8 h, the isobutane conversion of 49% was achieved with the corresponding isobutene selectivity of higher than 95%. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1023518 [article] Influence of lanthanum addition on catalytic properties of PtSnK/Al2O3 catalyst for isobutane dehydrogenation [texte imprimé] / Lihui Wan, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur . - 2011 . - pp. 4280–4285. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4280–4285 Mots-clés : Catalytic  properties Résumé : The effect of lanthanum addition on catalytic properties of PtSnK/Al2O3 catalyst for isobutane dehydrogenation was investigated. The catalysts were characterized by nitrogen adsorption, H2 chemisorption, XRF, XRD, XPS, TG, TPO, and NH3-TPD. Results showed that with the appropriate addition of lanthanum, the platinum dispersion increased, and carbon depositions decreased. The presence of La in the PtSnK/Al2O3 catalysts could not only strengthen the Sn−Al2O3 interaction, but also stabilize the oxidation states of Sn species, thus increasing the reaction activity and stability. Among the catalysts investigated, PtSnKLa(0.9 wt %)/Al2O3 had the best catalytic performance. After reaction for 8 h, the isobutane conversion of 49% was achieved with the corresponding isobutene selectivity of higher than 95%. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1023518

Influence of the competitive adsorbates on the catalytic properties of PtSnNaMg/ZSM-5 catalysts for propane dehydrogenation / Linyang Bai in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4345–4350 Titre : Influence of the competitive adsorbates on the catalytic properties of PtSnNaMg/ZSM-5 catalysts for propane dehydrogenation Type de document : texte imprimé Auteurs : Linyang Bai, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 4345–4350 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalytic  properties Résumé : This paper is aimed at studying the influence of the competitive adsorbates (HCl, lactic acid, and citric acid) on the structural and catalytic properties of PtSnNaMg/ZSM-5 catalysts for propane dehydrogenation. N2 adsorption, X-ray diffraction, inductively coupled plasma, NH3 temperature-programmed desorption, H2 temperature-programmed reduction and transmission electron microscopy were applied for characterization of the prepared catalysts. The catalytic performance was tested in a microreactor. The obtained results indicate that the catalyst prepared in HCl medium exhibited the best catalytic activity and stability due to relatively better metal distribution on the support and/or the strong interactions between Pt and Sn as well as between them and the support. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1018639 [article] Influence of the competitive adsorbates on the catalytic properties of PtSnNaMg/ZSM-5 catalysts for propane dehydrogenation [texte imprimé] / Linyang Bai, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur . - 2011 . - pp. 4345–4350. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4345–4350 Mots-clés : Catalytic  properties Résumé : This paper is aimed at studying the influence of the competitive adsorbates (HCl, lactic acid, and citric acid) on the structural and catalytic properties of PtSnNaMg/ZSM-5 catalysts for propane dehydrogenation. N2 adsorption, X-ray diffraction, inductively coupled plasma, NH3 temperature-programmed desorption, H2 temperature-programmed reduction and transmission electron microscopy were applied for characterization of the prepared catalysts. The catalytic performance was tested in a microreactor. The obtained results indicate that the catalyst prepared in HCl medium exhibited the best catalytic activity and stability due to relatively better metal distribution on the support and/or the strong interactions between Pt and Sn as well as between them and the support. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1018639

Sn-Modified ZSM-5 As support for platinum catalyst in propane dehydrogenation / Yiwei Zhang in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Permalink