高度分散WO_(x)/SiO_(2)催化剂的制备及烯烃歧化反应性能  

Preparation of Highly Dispersed WO_(x)/SiO_(2)Catalyst and Its Performance in Olefin Disproportionation Reaction

作　　者：张强[1] 谭昊轩 崔宇超 王焕[1] 张晓彤[1] 宋丽娟[1,2] Zhang Qiang;Tan Haoxuan;Cui Yuchao;Wang Huan;Zhang Xiaotong;Song Lijuan(Key Laboratory of Petrochemical Catalytic Science and Technology,Liaoning Petrochemical University,Fushun Liaoning 113001,China;College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao Shandong 266555,China)

机构地区：[1]辽宁石油化工大学辽宁省石油化工催化科学与技术重点实验室,辽宁抚顺113001 [2]中国石油大学(华东)化学化工学院,山东青岛266555

出　　处：《辽宁石油化工大学学报》2022年第5期32-37,共6页Journal of Liaoning Petrochemical University

基　　金：国家自然科学基金项目(U1908203);辽宁省教育厅科学研究经费优青培育计划项目(L2019035)。

摘　　要：通过对WO_(x)/SiO_(2)催化剂载体的筛选和WO_(x)负载量的考察,成功筛选出一种性能优异的国产SiO_(2)载体,运用氮气物理吸附、XRD、Raman光谱和TEM/EDS对催化剂结构进行表征,考察了WO_(x)物种在载体上的分散情况和乙烯与丁烯歧化制丙烯的催化反应性能,并与国外某商业催化剂的性能进行了对比。结果表明,当国产载体S-SiO_(2)的WO_(x)负载量阈值为8%时,催化剂显示出最佳催化活性和选择性;与商业催化剂的催化性能相比,其催化活性高近10%,且稳定性和选择性相当;关联结构表征结果证实,WO_(x)物种在载体上的分散特征是影响催化性能的关键因素,SiO_(2)载体和负载量也是影响WO_(x)物种分散状态的关键。本研究可为高效烯烃歧化反应WO_(x)/SiO_(2)催化剂的国产化,尤其是国产SiO_(2)载体的选择提供依据。This paper carried out the screening of WO_(x)/SiO_(2) catalyst carrier and the investigation of WO_(x) loading capacity,and successfully screened a domestic SiO_(2) carrier with excellent performance.The structure and properties of the catalyst were characterized by nitrogen physical adsorption,XRD,Raman spectroscopy and TEM/EDS.The dispersion of WO_(x) species on the carrier was mainly investigated,the catalytic reaction performance of disproportionation of ethylene and butene to propylene was investigated,and the performance was compared with that of a foreign commercial catalyst.The research results show that the WO_(x) loading threshold of the domestic carrier S‐SiO_(2) is 8%.At this time,the catalyst shows the best catalytic activity and selectivity.Compared with the catalytic performance of the comparative commercial catalyst,the catalyst activity is nearly 10%higher,and the stability and selectivity are equivalent,and the correlation structure characterization results can confirm that the dispersion characteristics of WO_(x) species on the support are the key factors that affect the catalytic performance,while the SiO_(2) support and loading are both the key to the dispersion state of WO_(x) species.This study can provide a basis for the localization of WO_(x)/SiO_(2) catalysts for high‐efficiency olefin disproportionation reactions,especially the selection of domestic SiO_(2) carriers.

关 键 词：WO_(x)/SiO_(2)催化剂 载体 烯烃歧化反应 负载量 分散特征 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]