太原理工大学学报2017，Vol.48Issue(4)：539-544,6.DOI:10.16355/j.cnki.issn1007-9432tyut.2017.04.005
ZSM-22分子筛催化性能及失活行为探究
Study of the Catalytic Performance and Deactivation of ZSM-22 Zeolite
摘要
Abstract
ZSM-22 zeolite was prepared by hydrothermal synthesis and its catalytic performance and deactivation behavior in methanol to olefin (MTO) were explored.The results suggest that low temperature is unfavorable to the activation of methanol,whereas the methanol conversion can be significantly increased with the increase of reaction temperature.Meanwhile,the elevation of reaction temperature can enhance the contribution of alkene cycle,leading to the improvement of the selectivity of propene and butene,while it has less influence on the formation of ethene.However,methanol largely cracks into methane at excessively high temperature.It can be found that there is an obviously fold line relationship between methanol conversion and the amount of coke,illustrating that ZSM-22 has different deactivation behavior with the time on steam.The results verify that the deactivation of ZSM-22 is mainly resulted from the pore blocking at initial period,while the coke species dominantly generate on the external surface of zeolite with the increase of reaction time.关键词
ZSM-22分子筛/结构/催化性能/MTO性能/失活行为Key words
ZSM-22 zeolite/structure/catalytic performance/reactivity of MTO/deactivation behavior分类
化学化工引用本文复制引用
荆补琴,宁艳春,王森,陈刚,李俊汾..ZSM-22分子筛催化性能及失活行为探究[J].太原理工大学学报,2017,48(4):539-544,6.基金项目
国家自然科学基金资助项目:分子筛骨架铝分布和落位对其制丙烯催化性能的影响本质研究(21573270) （21573270）
山西省自然科学基金资助项目:甲醇制丙烯过程研究及高性能催化剂可控合成(2015021003) （2015021003）
