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Vapor-phase propylene epoxidation with H2/O2 over bioreduction Au/TS-1 catalysts / Guowu Zhan in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - 9019-9026 Titre : Vapor-phase propylene epoxidation with H2/O2 over bioreduction Au/TS-1 catalysts : synthesis, characterization, and optimization Type de document : texte imprimé Auteurs : Guowu Zhan, Auteur ; Mingming Du, Auteur ; Daohua Sun, Auteur Année de publication : 2011 Article en page(s) : 9019-9026 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Optimization  Catalyst  Bioremediation  Epoxidation Résumé : Au/TS-1 catalysts could be prepared by immobilizing the biosynthesized Au sol on TS-1 supports. A variety of techniques, such as N2 physisorption, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectorscopy, UV-visible diffuse reflectance, and thermogravimetric analysis, were employed to characterize both the supports and the bioreduction catalysts. The influence of various parameters (Si/Ti molar ratio, Au loading, immobilization pH, reaction temperature, and space velocity) on the catalytic performance in vapor phase propylene epoxidation with H2/O2 was systematically analyzed. parameter optimization results manifested that the optimum catalytic activity and stability of bioreduction Au/TS-1 catalysts were obtained of 573 optimum operation conditions of Si/Ti molar ratio Furthermore, of were also made to pH of 2, reaction temperature of 573 K, and space velocity of 4000-8000 mL gcat-1 h-1. Furthermore, efforts were also made to clarify the plausible reaction routes over the bioreduction catalysts. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395848 [article] Vapor-phase propylene epoxidation with H2/O2 over bioreduction Au/TS-1 catalysts : synthesis, characterization, and optimization [texte imprimé] / Guowu Zhan, Auteur ; Mingming Du, Auteur ; Daohua Sun, Auteur . - 2011 . - 9019-9026. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - 9019-9026 Mots-clés : Optimization  Catalyst  Bioremediation  Epoxidation Résumé : Au/TS-1 catalysts could be prepared by immobilizing the biosynthesized Au sol on TS-1 supports. A variety of techniques, such as N2 physisorption, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectorscopy, UV-visible diffuse reflectance, and thermogravimetric analysis, were employed to characterize both the supports and the bioreduction catalysts. The influence of various parameters (Si/Ti molar ratio, Au loading, immobilization pH, reaction temperature, and space velocity) on the catalytic performance in vapor phase propylene epoxidation with H2/O2 was systematically analyzed. parameter optimization results manifested that the optimum catalytic activity and stability of bioreduction Au/TS-1 catalysts were obtained of 573 optimum operation conditions of Si/Ti molar ratio Furthermore, of were also made to pH of 2, reaction temperature of 573 K, and space velocity of 4000-8000 mL gcat-1 h-1. Furthermore, efforts were also made to clarify the plausible reaction routes over the bioreduction catalysts. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395848