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| 乙醇脱水制乙烯中亚微米ZSM-5分子筛催化剂的积碳研究 | |
| 引用本文： | 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 |
| 作者姓名： | 王飞 罗漫 肖文德 程晓维 龙英才 |
| 作者单位： | 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 |
| 摘 要： | 在固定床反应器中研究了乙醇脱水反应中亚微米ZSM-5分子筛催化剂上乙醇、乙醚和乙烯的反应及积碳行为,采用TG、低温氮气吸附-脱附、吡啶吸附红外光谱和~13C NMR等方法对催化剂进行了表征,以考察分子筛催化剂的积碳行为及乙醇脱水反应机理。实验结果表明,乙醚是乙醇脱水生成乙烯的中间体,而乙烯低聚是积碳的主要来源;积碳的主要组成可能是烷基芳烃,而积碳速率与反应混合物中的烯烃含量及水含量有关,ZSM-5分子筛催化剂上各物质积碳速率由快到慢的顺序:乙烯>乙烯+水>乙醚>乙醇;在线反应100 h后,积碳堵塞了70%以上的催化剂孔道,并且消耗了80%以上的催化剂酸中心,因而导致催化剂活件有所降低。 |
| 关 键 词： | ZSM-5分子筛催化剂 亚微米 乙醇脱水 积碳行为 |
Coking Behavior of Submicron ZSM-5 Zeolite Catalyst in Dehydration of Ethanol to Ethylene |
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| Wang Fei,Luo Man,Xiao Wende,Cheng Xiaowei,Long Yingcai. Coking Behavior of Submicron ZSM-5 Zeolite Catalyst in Dehydration of Ethanol to Ethylene[J]. Petrochemical Technology, 2011, 40(1): 12-17 | |
| Authors: | Wang Fei Luo Man Xiao Wende Cheng Xiaowei Long Yingcai |
| Affiliation: | Wang Fei~1,Luo Man~2,Xiao Wende~2,Cheng Xiaowei~3,Long Yingcai~3 (1.State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China,2.School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,3.Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Department of Chemistry,Fudan University,Shanghai 200433,China) |
| 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,N_2 adsorption-desorption techniques,pyridine adsorption FTIR and ~(13)C NMR.Experimental results showed that diethyl ether was an intermediate of the ethanol dehydration to ethylene and that ethylene oligomerization was responsible for the ... |
| Keywords: | ZSM-5 zeolite catalyst submicron ethanol dehydration coking behavior |
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