氢等离子体法制备MoP/TiO_(2)加氢脱氮催化剂

Preparation of MoP/TiO_(2) hydrodenitrogenation catalyst by hydrogen plasma method

采用浸渍法,将TiO_(2)引入到MoP催化剂中,通过氢等离子体法(PR)制备了体相MoP催化剂和TiO_(2)改性的MoP催化剂,用XRD技术及TEM等手段对催化剂进行表征。以质量分数为1.0%的喹啉(Q)/十氢萘溶液作为模型化合物,考察了MoP催化剂和Ti-MoP(n)催化剂的加氢脱氮反应性能。结果表明:随着Ti/Mo摩尔比由0.1增至0.3时,与MoP催化剂比较,Ti-MoP(0.3)催化剂晶粒较小且比表面积大,TiO_(2)对MoP催化剂的加氢脱氮反应活性有促进作用,且Ti-MoP(0.3)催化剂的HDN活性高于其他催化剂,其活性随着Ti/Mo摩尔比增加而增大。喹啉在MoP催化剂和Ti-MoP(n)催化剂上主要通过DHQ路径脱氮,TiO_(2)的引入促进了喹啉加氢脱氮的反应。

TiO_(2) was introduced into MoP catalyst by impregnation method.The bulk phase MoP catalyst and TiO_(2) modification MoP catalyst were prepared by hydrogen plasma method(PR).The catalyst was characterized by XRD and TEM.Taking quinoline(Q)/decalin(1.0%)solution as model compound,the hydrodenitrification performance of MoP and Ti-MoP(n)catalysts was investigated.The results show that when Ti/Mo molar ratio increase from 0.1 to 0.3,the crystal size of Ti-MoP(0.3)catalyst is smaller and its specific surface area is larger than that of MoP catalyst,TiO_(2) promotes the hydrodenitrification activity of MoP catalyst,and HDN activity of Ti-MoP(0.3)catalyst is higher than that of other catalysts,and its activity increases with Ti/Mo molar ratio increasing.Quinoline is mainly denitrified by DHQ route on MoP and Ti-MoP(n)catalysts,and the introduction of TiO_(2) promotes the hydrodenitrification of quinoline.