燃料化学学报2017，Vol.45Issue(2)：213-219,7.
制备方法对稀土金属钇改性Ni2 P催化剂结构及其加氢脱硫性能的影响
Effect of preparation method on the structure of rare earth metal Y modified Ni2 P catalysts and its HDS performance
摘要
Abstract
The yttrium (Y) modified unsupported Yx-Ni2P catalysts were prepared by one step method and stepwise method (x refers to mol ratio of Y to Ni), respectively. The catalysts were characterized by X-ray diffraction ( XRD ) , N2 adsorption specific surface area measurements ( BET ) , CO uptake and X-ray photoelectron spectroscopy ( XPS ) . The effects of preparation methods on thehydrodesulfurization ( HDS ) property of the catalysts were investigated by using dibenzothiophene ( DBT ) as the model compound. The results show that the addition of Y can suppress the formation of Ni5 P4 phase and thus promote the formation of active Ni2 P phase. The addition of Y can dramatically increase the surface area and pore volume, effectively improve the HDS activity of nickel phosphide catalyst. The Yx-Ni2 P catalysts prepared by these two methods with Y/Ni mol ratio of 0. 10 exhibited the highest HDS activity. As compared to the stepwise method, the one step method which obtained catalysts possessed a larger specific surface area with high pore volume, a lower surface P/Ni mol ratio, a larger CO uptake and more exposed active Ni sites as compared to stepwise method. As a result, it showed a higher HDS activity. At a temperature of 340 ℃, a pressure of 3. 0 MPa, a H2/oil volume ratio of 700 and a weight hourly space velocity (WHSV) of 1. 5 h-1, the conversion of DBT over Y0.10-Ni2 P catalyst prepared by one step method reached 97. 7%, which was an increase of 5. 4%comparing with the Y0.10-Ni2P catalyst prepared by stepwise method (92. 3%).关键词
一步法/分步法/加氢脱硫/磷化镍/钇/二苯并噻吩Key words
one step method/stepwise method/hydrodesulfurization/nickel phosphide/yttrium/dibenzothiophene分类
化学化工引用本文复制引用
陈茂森,宋华,李锋,陈彦广,张建..制备方法对稀土金属钇改性Ni2 P催化剂结构及其加氢脱硫性能的影响[J].燃料化学学报,2017,45(2):213-219,7.基金项目
The project was supported by the National Natural Science Foundation of China (21276048), the Natural Science Foundation of Heilongjiang Province of China (ZD201201)and the General Program of Education Department of Heilongjiang Province (12541060).国家自然科学基金(21276048),黑龙江省自然科学基金(ZD201201)和黑龙江省教育厅项目(12541060)资助 （21276048）
