[article] 
inIndustrial & 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