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Citation: SHI Lei, ZHANG Zeng-hui, QIU Ze-gang, GUO Fang, ZHANG Wei, ZHAO Liang-fu. Effect of phosphorus modification on the catalytic properties of Mo-Ni/Al2O3 in the hydrodenitrogenation of coal tar[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(1): 74-80. shu

Effect of phosphorus modification on the catalytic properties of Mo-Ni/Al2O3 in the hydrodenitrogenation of coal tar

  • 1.

    1. Laboratory of Applied Catalysis and Green Chemical Engineering, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

  • Corresponding author: QIU Ze-gang, 
  • Received Date: 14 July 2014
    Available Online: 22 September 2014

    Fund Project: 中国科学院战略性先导科技专项课题(XDA07020200). (XDA07020200)

  • Mo-Ni/Al2O3 catalysts were modified with phosphorus by using the impregnation method. By changing the addition sequence of phosphorus, three types of catalysts, viz. MoP-Ni/Al2O3, Mo-NiP/Al2O3 and Mo-Ni/PAl2O3, were obtained with a P loading of 1.34%. These catalysts were characterized by X-ray diffraction, temperature-programmed desorption of NH3, temperature-programmed reduction by H2 and N2 sorption experiment. The catalytic properties of these catalysts were investigated with the hydrodenitrogenation (HDN) of low- and middle-temperature coal tar obtained from Xinjiang province. It was shown that appropriate P addition sequence can alter acid site distributions, increase the proportion of effective pores between 10 and 13 nm, weaken the interaction of the support and active metal components and make the reduction of the active components easier, consequently, improving the catalytic performance. The HDN activity of the three types of catalysts decreased in the order of Mo-Ni/PAl2O3(74.36%) > Mo-NiP/Al2O3(72.74%) > Mo-Ni/Al2O3(56.13%) > MoP-Ni/Al2O3(71.72%).
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