石油炼制与化工

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Ni2P/TiO2-Al2O3催化剂的制备及加氢脱氮反应性能

张海礁1,边昌兵2,王海彦2,白英之2   

  1. 1. 石化学院
    2. 辽宁石油化工大学 石化学院
  • 收稿日期:2011-03-11 修回日期:2011-06-09 出版日期:2011-12-12 发布日期:2011-12-12
  • 通讯作者: 张海礁

PREPARATION AND PERFORMANCE OF Ni2P/TiO2-Al2O3 CATALYST FOR HYDRODENITROGENATION

  • Received:2011-03-11 Revised:2011-06-09 Online:2011-12-12 Published:2011-12-12

摘要: 采用溶胶-凝胶法制备TiO2-Al2O3复合载体,并用饱和浸渍法制备Ni2P/TiO2-Al2O3催化剂氧化态前躯体。在固定床反应器中采用原位还原技术用H2制备出Ni2P/TiO2-Al2O3催化剂。以喹啉为模型化合物对催化剂的加氢脱氮性能进行评价,结果表明,n(TiO2):n(Al2O3)及Ni2P的负载量对催化剂活性有较大影响,当n(TiO2):n(Al2O3)=1:4、Ni2P的负载量(w)为25% 时,Ni2P/TiO2-Al2O3催化剂表现出最高的催化活性,脱氮率达98%。

关键词: 加氢脱氮, Ni2P, 喹啉, A12O3, TiO2

Abstract: TiO2-Al2O3 mixed supports were prepared by sol-gel method and used in preparation of Ni2P/TiO2-Al2O3 catalysts by co-impregnation.Hydrodenitrogenation(HDN) activity of the catalysts was tested in a fixed bed reactor after in-situ reduction.The results showed that titanium-to-aluminium molar ratio and Ni loadings had remarkable influence on activity of the catalysts.The result showed that the hydrodesulfurization activity of the Ni2P/TiO2-Al2O3 catalyst reached the best HDN activity when the ratio of n(Ti)/n(Al) was 1 to 4 and Ni loadings of 25%. the catalyst exhibited the highest HDS activity, with desulfurization rate of 98%.

Key words: hydrodenitrogenation, nickel phosphide, quinoline, alumina, titania