Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (09): 2461-2467.doi: 10.3866/PKU.WHXB20100937

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

Preparation, Hydrodesulfurization and Hydrodenitrogenation Performance of a Ni2P/TiO2-Al2O3 Catalyst

SONG Hua, GUO Yun-Tao, LI Feng, YU Hong-Kun   

  1. Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical Engineering,Northeast Petroleum University, Daqing 163318, Heilongjiang Province, P. R. China
  • Received:2010-03-30 Revised:2010-05-22 Published:2010-09-02
  • Supported by:

    The project was supported by the Heilongjiang Science and Technology Agency, China (2009G0947-00).

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Abstract:

We prepared a TiO2-Al2O3 complex support by the sol-gel method. A nickel phosphide catalyst, Ni2P/ TiO2-Al2O3, was prepared by the impregnation method. The catalysts were characterized by X-ray diffraction (XRD), N2-adsorption specific surface area measurements (BET), thermogravimetry-differential thermal analysis (TG-DTA), and X-ray photoelectron spectroscopy (XPS). The catalysts were evaluated using a lab-scale continuous flow fixed-bed reactor for simultaneously hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) of thiophene and pyridine. The effects of different supports, Ni2P loading, Ni/P molar ratio, and calcination temperature on catalyst activity for the HDS and HDN were studied. The catalytic activity of the Ni2P/TiO2-Al2O3 catalyst with a TiO2 mass fraction of 80%, a Ni2P loading of 30.0%(w), a Ni/P molar ratio of 1/2 as well as a calcination temperature of 500oCwas found to be optimal. At a reaction temperature of 360 o, a pressure of 3.0 MPa, a hydrogen/oil ratio of 800 (V/V), and a liquid hourly space velocity of 1.5 h-1, the conversion of thiophene HDS and pyridine HDN were 61.32%and 64.43%, respectively.

Key words: Nickel phosphide, Titaniumdioxide, Aluminiumtrioxide, Hydrodesulfurization, Hydrodenitrogenation