石油化工2011，Vol.40Issue(1)：12-17,6.
乙醇脱水制乙烯中亚微米ZSM-5分子筛催化剂的积碳研究
Coking Behavior of Submicron ZSM-5 Zeolite Catalyst in Dehydration of Ethanol to Ethylene
王飞 1罗漫 2肖文德 2程晓维 3龙英才3
作者信息
- 1. 华东理工大学化学工程联合国家重点实验室,上海200237
- 2. 上海交通大学化学化工学院,上海200240
- 3. 复旦大学化学系上海市分子催化与新材料重点实验室,上海200433
- 折叠
摘要
Abstract
Reactions and coking behaviors of ethanol, diethyl ether or ethylene on a submicron ZSM-5 zeolite catalyst, which was used in dehydration of ethanol to ethylene, were studied in a fixbed reactor. The coking behavior and the dehydration mechanism were analyzed by means of TG, N2 adsorption-desorption techniques, pyridine adsorption FTIR and 13C NMR. Experimental results showed that diethyl ether was an intermediate of the ethanol dehydration to ethylene and that ethylene oligomerization was responsible for the coke formation. The coke might consist mainly of alkyl aromatics and the coke deposition rate was correlated to the olefin content and the water content in the reaction mixture. The coke deposition rate on the ZSM-5 zeolite catalyst lowered in the following order: ethylene ＞ ethylene and water ＞ diethyl ether ＞ ethanol, which were used as feeds separately.After 100 h on stream, the coke deposits blocked more than 70％ of the catalyst pores, and consumed more than 80％ of acid sites on the catalyst, which caused a loss of catalyst activity.关键词
ZSM-5分子筛催化剂/亚微米/乙醇脱水/积碳行为Key words
ZSM-5 zeolite catalyst/ submicron/ ethanol dehydration/ coking behavior分类
化学化工引用本文复制引用
王飞,罗漫,肖文德,程晓维,龙英才..乙醇脱水制乙烯中亚微米ZSM-5分子筛催化剂的积碳研究[J].石油化工,2011,40(1):12-17,6.
