燃料化学学报2017，Vol.45Issue(11)：1384-1391,8.
W掺杂对Mo/HZSM-5催化甲烷无氧芳构化性能的影响
Effect of W addition on the catalytic properties of Mo/HZSM-5 catalyst in methane non-oxidative dehydroaromatization
摘要
Abstract
Mo/HZSM-5 , Mo-W/HZSM-5 and W/HZSM-5 catalysts were prepared via a conventional impregnation method. The catalysts were characterized by means of XRD, BET, Py-FTIR, H2-TPR, XPS, TEM, NH3-TPD, TPO, TG and Raman, and were evaluated in methane non-oxidative dehydroaromatization (MDA). Compared with Mo/HZSM-5,the CH4 conversion,aromatics yield and catalytic stability were improved by W addition for Mo-W/HZSM-5 in MDA reaction. H2-TPR and XPS results indicated that the octahedral ( WO6 ) n- groups existed in Mo-W/HZSM-5 were more easily reduced to W4+-containing species in MDA reaction in comparison with W/HZSM-5, and W4+-containing species was correlated with the high MDA activity. At the same time, it is found that graphitic-like coking is the main reason of catalyst deactivation for Mo/HZSM-5, and this coking over Mo-W/HZSM-5 catalyst can be inhibited by W addition during MDA.关键词
无氧芳构化/钼/积炭/钨Key words
non-oxidative dehydroaromatization/molybdenum/coking/tungsten分类
化学引用本文复制引用
赵珂珂,黄鑫,贾丽涛,侯博,李德宝..W掺杂对Mo/HZSM-5催化甲烷无氧芳构化性能的影响[J].燃料化学学报,2017,45(11):1384-1391,8.基金项目
The project was supported by the National Natural Science Foundation of China (21273265) and the Coal Base Key Technologies R&D Program of ShanXi Province (MH2014-13).国家自然科学基金(21273265)和山西省煤基重点科技攻关项目(MH2014-13)资助 （21273265）
