Experimental Evidence on the Formation of Ethene through Carbocations in Methanol Conversion over H-ZSM-5 Zeolite
作者:Chao Wang、Xianfeng Yi、Jun Xu、Guodong Qi、Pan Gao、Weiyu Wang、Yueying Chu、Qiang Wang、Ningdong Feng、Xiaolong Liu、Anmin Zheng、Feng Deng
DOI:10.1002/chem.201501355
日期:2015.8.17
The methanol to olefins conversion over zeolite catalysts is a commercialized process to produce light olefins like ethene and propene but its mechanism is not well understood. We herein investigated the formation of ethene in the methanol to olefins reaction over the H‐ZSM‐5 zeolite. Three types of ethylcyclopentenyl carbocations, that is, the 1‐methyl‐3‐ethylcyclopentenyl, the 1,4‐dimethyl‐3‐ethylcyclopentenyl
通过沸石催化剂将甲醇转化为烯烃是生产轻质烯烃(如乙烯和丙烯)的商业化方法,但其机理尚不十分清楚。我们在本文中研究了在H-ZSM-5沸石上甲醇与烯烃反应中乙烯的形成。三种固体乙基环戊烯基碳阳离子,即1-甲基-3-乙基环戊烯基,1,4-二甲基-3-乙基环戊烯基和1,5-二甲基-3-乙基环戊烯基阳离子在工作条件下均由两种固体明确鉴定态和液态NMR光谱以及GC-MS分析。发现这些碳阳离子与乙烯和低级甲基苯(二甲苯和三甲基苯)具有良好的相关性。