Ni2P Catalysts Supported on Titania-Modified Alumina for the Hydrodesulfurization of Dibenzothiophene

详细信息    查看全文

• 作者：Tao Chen ; Bolun Yang ; Shasha Li ; Kaile Wang ; Xuedong Jiang ; Yong Zhang ; Guanwei He
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：October 5, 2011
• 年：2011
• 卷：50
• 期：19
• 页码：11043-11048
• 全文大小：837K
• 年卷期：v.50,no.19(October 5, 2011)
• ISSN：1520-5045

文摘

Nickel phosphide catalysts supported on the TiO₂鈥揂l₂O₃ 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鈥揂l₂O₃ composite support effectively prevents the formation of aluminum phosphates due to the strong interaction between phosphorus and 纬-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鈥揂l₂O₃ 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^鈥?, and volume ratio of hydrogen/oil of 450.