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Desulfurization of vacuum gasoil by MCM-41 supported molybdenum-nickel catalysts / Tzong-Rong Ling in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - pp. 1797–1803 Titre : Desulfurization of vacuum gasoil by MCM-41 supported molybdenum-nickel catalysts Type de document : texte imprimé Auteurs : Tzong-Rong Ling, Auteur ; Ben-Zu Wan, Auteur ; Hong-Ping Lin, Auteur Année de publication : 2009 Article en page(s) : pp. 1797–1803 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Vacuum  gas  oil  Hydrodesulfurization  Trickle  bed  reactor  Scanning  electron  microscopy  Temperature  programming  reduction  X-ray  diffraction Résumé : Hydrodesulfurization (HDS) of vacuum gas oil (VGO) was carried out in a trickle bed reactor at 400 °C and 7.2 MPa with a weight hourly space velocity (WHSV) = 2 h−1 over a series of molybdenum−nickel catalysts, which were prepared by loading the same amounts of MoO3 (12 wt %) and NiO (3 wt %) on supports including: tubular shaped MCM-41, nontubular shaped MCM-41, alumina, and silica. The HDS activity of the MoNi catalysts with different supports was investigated. The tubular shaped MCM-41, which possesses a regularly ordered molecular sieve structure, was shown to give significant improvements in the diffusion of large molecules. The results indicated that the tubular shaped MCM-41 supported catalyst has a higher activity than the other catalysts when measured over a 4−5 day running period. The effect of Si/Al ratios in the framework is also discussed. Various methods and techniques were used to characterize the catalysts such as: scanning electron microscopy (SEM), transmission electronic microscopy (TEM), temperature programming reduction (TPR), X-ray diffraction (XRD), mercury-porosity, and the generation of nitrogen adsorption−desorption isotherms. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8014389 [article] Desulfurization of vacuum gasoil by MCM-41 supported molybdenum-nickel catalysts [texte imprimé] / Tzong-Rong Ling, Auteur ; Ben-Zu Wan, Auteur ; Hong-Ping Lin, Auteur . - 2009 . - pp. 1797–1803. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - pp. 1797–1803 Mots-clés : Vacuum  gas  oil  Hydrodesulfurization  Trickle  bed  reactor  Scanning  electron  microscopy  Temperature  programming  reduction  X-ray  diffraction Résumé : Hydrodesulfurization (HDS) of vacuum gas oil (VGO) was carried out in a trickle bed reactor at 400 °C and 7.2 MPa with a weight hourly space velocity (WHSV) = 2 h−1 over a series of molybdenum−nickel catalysts, which were prepared by loading the same amounts of MoO3 (12 wt %) and NiO (3 wt %) on supports including: tubular shaped MCM-41, nontubular shaped MCM-41, alumina, and silica. The HDS activity of the MoNi catalysts with different supports was investigated. The tubular shaped MCM-41, which possesses a regularly ordered molecular sieve structure, was shown to give significant improvements in the diffusion of large molecules. The results indicated that the tubular shaped MCM-41 supported catalyst has a higher activity than the other catalysts when measured over a 4−5 day running period. The effect of Si/Al ratios in the framework is also discussed. Various methods and techniques were used to characterize the catalysts such as: scanning electron microscopy (SEM), transmission electronic microscopy (TEM), temperature programming reduction (TPR), X-ray diffraction (XRD), mercury-porosity, and the generation of nitrogen adsorption−desorption isotherms. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8014389