Ni2P/TiO2-SiO2催化剂的制备、表征及其加氢脱氮反应性能评价

石油炼制与化工 ›› 2014, Vol. 45 ›› Issue (9): 40-46.

Ni2P/TiO2-SiO2催化剂的制备、表征及其加氢脱氮反应性能评价

鄢景森^1,2,3,王海彦^1,2,齐振东²,李晓惠³

1. 中国石油大学（华东） 2. 辽宁石油化工大学
3. 辽宁科技学

收稿日期:2014-02-17 修回日期:2014-06-04 出版日期:2014-09-12 发布日期:2014-08-19
通讯作者: 王海彦 E-mail:FSWHY@126.COM

PREPARATION，CHARACTERIZATION AND HYDRODENITROGENATION ACTIVITY OF Ni2P/TiO2-SiO2 CATALYST

Received:2014-02-17 Revised:2014-06-04 Online:2014-09-12 Published:2014-08-19

摘要/Abstract

摘要： 采用溶胶-凝胶法制备了不同Ti/Si比的TiO2-SiO2 复合载体，其负载的磷化镍催化剂采用等体积浸渍法和H2原位还原法制备，以喹啉为模型化合物，考察了活性组分负载量、Ni/P比、Ti/Si比对催化剂加氢脱氮性能的影响。采用N2吸附、XRD、TPR、NH3-TPD和FT-IR等技术对载体和催化剂进行了表征。结果表明：溶胶-凝胶法制成的复合载体具有较大的比表面积，其负载的磷化镍催化剂具有较好的可还原性，Ni/P摩尔比小于1.0时，还原后所形成的物相为Ni2P；当Ti/Si摩尔比为1/2、Ni/P摩尔比为1.0、Ni-P负载量（w）为25%时，Ni2P/TiO2-SiO2催化剂具有最佳的加氢脱氮效果。

Abstract: TiO2-SiO2 composite support was prepared by sol-gel method，and the supported nickel phosphide catalysts, Ni2P/TiO2-SiO2，were prepared by incipient wetness impregnation and in situ H2 reduction method. The samples were characterized by N2 adsorption-desorption, XRD, TPR， NH3-TPD and FT-IR. Their hydrodenitrogenation (HDN) performance was evaluated in a continuous-flow fixed-bed reactor using quinoline as a model molecule to investigate the effect of the active component loading, Ni/P molar ratio and Ti/Si molar ratio. The results show that TiO2-SiO2 composite support has a larger specific surface area. The Ni2P/TiO2-SiO2 catalyst precursor has a better reducibility, which helps the formation of Ni2P phase. Ni2P phase appears for the Ni2P/TiO2-SiO2 catalyst at n(Ni)/n(P)≤1.0. The optimal HDN activity occurs for the Ni2P/TiO2-SiO2 with Ti/Si molar ratio of 1/2，Ni/P molar ratio of 1.0 and the loading of (NiO+P2O5) of 25%.

鄢景森王海彦齐振东李晓惠. Ni2P/TiO2-SiO2催化剂的制备、表征及其加氢脱氮反应性能评价[J]. 石油炼制与化工, 2014, 45(9): 40-46.