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P改性对Mo-Ni/Al2O3煤焦油加氢脱氮性能的影响
引用本文:石垒,张增辉,邱泽刚,郭芳,张伟,赵亮富.P改性对Mo-Ni/Al2O3煤焦油加氢脱氮性能的影响[J].燃料化学学报,2015,43(1):74-80.
作者姓名:石垒  张增辉  邱泽刚  郭芳  张伟  赵亮富
作者单位:1. Laboratory of Applied Catalysis and Green Chemical Engineering, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China
基金项目:中国科学院战略性先导科技专项课题(XDA07020200).
摘    要:在磷含量1.34%下,采用分步浸渍法按磷添加顺序不同制备了3种改性催化剂:MoP-Ni/Al2O3、Mo-NiP/Al2O3、Mo-Ni/PAl2O3.通过X射线衍射(XRD)、程序升温脱附(NH3-TPD)、程序升温还原(H2-TPR)、氮气吸附等技术对催化剂进行了表征.以新疆中低温煤焦油为原料,考察了不同磷改性方式对催化剂加氢脱氮(HDN)性能的影响.结果表明,适宜的磷添加方式能够改变催化剂的酸性分布,提高10~13 nm加氢脱氮有效孔的比例,并且减弱活性组分与载体的相互作用,同时使得活性组分更易被还原,进而提高催化剂加氢脱氮性能.加氢脱氮活性顺序为Mo-Ni/PAl2O3(74.36%)>Mo-NiP/Al2O3(72.74%)>Mo-Ni/Al2O3(71.72%)>MoP-Ni/Al2O3(56.13%).

关 键 词:  煤焦油  加氢脱氮  催化剂  
收稿时间:2014-07-14

Effect of phosphorus modification on the catalytic properties of Mo-Ni/Al2O3 in the hydrodenitrogenation of coal tar
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.
Authors:SHI Lei  ZHANG Zeng-hui  QIU Ze-gang  GUO Fang  ZHANG Wei  ZHAO Liang-fu
Institution:1. Laboratory of Applied Catalysis and Green Chemical Engineering, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract: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%).
Keywords:phosphous  coal tar  hydrodenitrogenation  catalyst
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