Documents disponibles écrits par cet auteur

Ni2P catalysts supported on titania - modified alumina for the hydrodesulfurization of dibenzothiophene / Tao Chen in Industrial & engineering chemistry research, Vol. 50 N° 19 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11043–11048 Titre : Ni2P catalysts supported on titania - modified alumina for the hydrodesulfurization of dibenzothiophene Type de document : texte imprimé Auteurs : Tao Chen, Auteur ; Bolun Yang, Auteur ; Shasha Li, Auteur Année de publication : 2011 Article en page(s) : pp. 11043–11048 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalysts Résumé : Nickel phosphide catalysts supported on the TiO2–Al2O3 composite oxide were successfully prepared by impregnation of nickel phosphate precursors followed by temperature-programmed reduction. The catalysts were characterized by X-ray diffraction, thermogravimetric analysis, IR spectroscopy, N2 adsorption, and X-ray photoelectron spectroscopy. The catalytic activity was characterized in a fixed-bed reactor for hydrodesulfurization using a model liquid-feed dibenzothiophene, which contained 2000 mg/kg sulfur. Experimental results indicate that the TiO2–Al2O3 composite support effectively prevents the formation of aluminum phosphates due to the strong interaction between phosphorus and γ-Al2O3, and it also shows strong interactions with Ni and P species on the surface, which is the main reason for the enhancement in hydrodesulfurization activity and stability. Among the Ni2P/TiO2–Al2O3 samples tested, the catalyst at a Ni loading of 15 wt % showed the highest activity with a steady-state dibenzothiophene conversion of 99.9% at 613 K, 2.5 MPa, WHSV 3 h–1, and volume ratio of hydrogen/oil of 450. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201188v [article] Ni2P catalysts supported on titania - modified alumina for the hydrodesulfurization of dibenzothiophene [texte imprimé] / Tao Chen, Auteur ; Bolun Yang, Auteur ; Shasha Li, Auteur . - 2011 . - pp. 11043–11048. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11043–11048 Mots-clés : Catalysts Résumé : Nickel phosphide catalysts supported on the TiO2–Al2O3 composite oxide were successfully prepared by impregnation of nickel phosphate precursors followed by temperature-programmed reduction. The catalysts were characterized by X-ray diffraction, thermogravimetric analysis, IR spectroscopy, N2 adsorption, and X-ray photoelectron spectroscopy. The catalytic activity was characterized in a fixed-bed reactor for hydrodesulfurization using a model liquid-feed dibenzothiophene, which contained 2000 mg/kg sulfur. Experimental results indicate that the TiO2–Al2O3 composite support effectively prevents the formation of aluminum phosphates due to the strong interaction between phosphorus and γ-Al2O3, and it also shows strong interactions with Ni and P species on the surface, which is the main reason for the enhancement in hydrodesulfurization activity and stability. Among the Ni2P/TiO2–Al2O3 samples tested, the catalyst at a Ni loading of 15 wt % showed the highest activity with a steady-state dibenzothiophene conversion of 99.9% at 613 K, 2.5 MPa, WHSV 3 h–1, and volume ratio of hydrogen/oil of 450. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201188v

Process simulation based on experimental investigations for 3 - methylthiophene alkylation with isobutylene in a reactive distillation column / Yu Liu in Industrial & engineering chemistry research, Vol. 51 N° 29 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9803-9811 Titre : Process simulation based on experimental investigations for 3 - methylthiophene alkylation with isobutylene in a reactive distillation column Type de document : texte imprimé Auteurs : Yu Liu, Auteur ; Bolun Yang, Auteur ; Shasha Li, Auteur Année de publication : 2012 Article en page(s) : pp. 9803-9811 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Distillation  column  Distillation  with  reaction  Alkylation Résumé : A new approach that substitutes the original two-step olefinic alkylation of thiophenic sulfur (OATS) technology with a reactive distillation (RD) column was proposed to remove sulfur compounds from fluid catalytic cracking (FCC) gasoline. 3-Methylthiophene (3MT) and isobutylene (IB) were designated as the model compounds for sulfide and olefin, respectively; NKC-9 cation exchange resin mixed with the 2 mm × 2 mm θ ring packing was used as the catalyst bed. The process parameters such as feed composition, molar ratio of 3MT to IB, and reflux ratio were investigated experimentally in the RD column. Simulation for this process was carried out by using the equilibrium stage model—the RADFRAC module of Aspen Plus. The multicomponent vapor―liquid equilibria were predicted by an UNIQUAC method, and the kinetics model that is essential in the RD process was obtained from our previous work. The key design factors (e.g., number of reactive and nonreactive stages, location of feed stage, column pressure, mass ratio of distillate to feed, and catalyst weight) were optimized. The theoretical calculations from the equilibrium stage model matched well with the experimental results. Optimization of the process revealed that applying RD technology into OATS process offers higher alkylation selectivity and better catalytic stability, and the sulfur content in FCC gasoline declined by more than 99%. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26184959 [article] Process simulation based on experimental investigations for 3 - methylthiophene alkylation with isobutylene in a reactive distillation column [texte imprimé] / Yu Liu, Auteur ; Bolun Yang, Auteur ; Shasha Li, Auteur . - 2012 . - pp. 9803-9811. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9803-9811 Mots-clés : Distillation  column  Distillation  with  reaction  Alkylation Résumé : A new approach that substitutes the original two-step olefinic alkylation of thiophenic sulfur (OATS) technology with a reactive distillation (RD) column was proposed to remove sulfur compounds from fluid catalytic cracking (FCC) gasoline. 3-Methylthiophene (3MT) and isobutylene (IB) were designated as the model compounds for sulfide and olefin, respectively; NKC-9 cation exchange resin mixed with the 2 mm × 2 mm θ ring packing was used as the catalyst bed. The process parameters such as feed composition, molar ratio of 3MT to IB, and reflux ratio were investigated experimentally in the RD column. Simulation for this process was carried out by using the equilibrium stage model—the RADFRAC module of Aspen Plus. The multicomponent vapor―liquid equilibria were predicted by an UNIQUAC method, and the kinetics model that is essential in the RD process was obtained from our previous work. The key design factors (e.g., number of reactive and nonreactive stages, location of feed stage, column pressure, mass ratio of distillate to feed, and catalyst weight) were optimized. The theoretical calculations from the equilibrium stage model matched well with the experimental results. Optimization of the process revealed that applying RD technology into OATS process offers higher alkylation selectivity and better catalytic stability, and the sulfur content in FCC gasoline declined by more than 99%. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26184959