摘要
分别采用共沉淀法和浸渍法将TiO2引入到非负载的磷化镍(Ni2P)催化剂中,并以喹啉(Q)作为模型化合物,考察了2种方法制备的Ti-Ni2P催化剂对喹啉加氢脱氮(HDN)反应性能的影响。同时,采用XRD、N2吸附和XPS手段表征了所制备的催化剂。结果表明,采用共沉淀法和浸渍法引入的TiO2均对Ni2P催化剂HDN反应活性有很大的促进作用,用浸渍法制备的Ni2P催化剂活性更高。存在于Ni2P表面的TiO2与Ni2P之间存在相互作用是促进Ni2P HDN活性的主要原因。浸渍法制备的Ni2P催化剂表面的TiO2含量更高,因此对HDN反应活性的促进效果更加显著。
The bulk Ti-Ni2 P catalysts were prepared by co-precipitation and impregnation of TiO2 on Ni2P, then characterized by XRD, XPS and TPR. Their hydrodenitrogenation （HDN） activities were evaluated by means of 1% quinoline in decalin. HDN activity of Ni2P was improved by TiO2 introduced by the two methods. However, the Ti-Ni2P catalyst prepared by impregnation showed higher activity in quinoline HDN reaction than Ti-Ni2P catalyst prepared by co-precipitation. The TiO2 species were mainly located on the surface of Ti-Ni2P catalysts and had strong interactions with surface Ni and P species, which was the main reason of HDN activity enhancement. More TiO2 species on the surface of the Ti-Ni2P catalyst prepared by impregnation may be responsible for higher HDN activity of the catalyst.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2009年第4期522-526,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家自然科学基金(20503003
20333030)
教育部博士点专项基金(20030141026)
江苏高校自然科学重大基础研究项目(05KJA43004)资助
