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学科主题: 物理化学
题名: Catalytic role of different pore systems in MCM-49 zeolite for liquid alkylation of benzene with ethylene
作者: Liu, Kefeng1, 2;  Xie, Sujuan1;  Liu, Shenglin1;  Xu, Guoliang1;  Gao, Ningning1, 2;  Xu, Longya1
通讯作者: 徐龙伢
关键词: MCM-49 zeolite ;  Liquid alkylation ;  Benzene ;  Ethylene ;  Pore system
刊名: JOURNAL OF CATALYSIS
发表日期: 2011-10-06
DOI: 10.1016/j.jcat.2011.07.004
卷: 283, 期:1, 页:68-74
收录类别: SCI
文章类型: Article
部门归属: 8
项目归属: 804
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
摘要: Catalytic role of different pore systems in MCM-49 zeolite for liquid alkylation of benzene with ethylene
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The properties of three types of pore systems in MCM-49 zeolite have been investigated by precoking to block the supercages and poisoning the surface pockets. Most Lewis acid sites (ca. 73%) are located within the supercages, while 38% of Bronsted acid sites are located in the surface pockets, 28% in the sinusoidal pores and only 34% in the supercages, respectively. Alkylation of benzene with ethylene mainly occurs in the surface pockets, and the contribution from the sinusoidal pores is limited. The generation of heavy aromatics in supercages results in the deactivation of MCM-49 at the early reaction stage. A moderate alkali-treatment process has been demonstrated to enlarge the opening of supercages without affecting the sinusoidal pores, resulting in improved diffusion of big molecules and hence better catalytic performance for liquid alkylation of benzene with ethylene. (C) 2011 Elsevier Inc. All rights reserved.
关键词[WOS]: M-XYLENE TRANSFORMATION ;  N-HEPTANE CRACKING ;  H-MCM-22 ZEOLITES ;  PHASE ALKYLATION ;  EXTERNAL ACIDITY ;  HMCM-22 ZEOLITE ;  COKE FORMATION ;  BETA-ZEOLITES ;  ZSM-5 ZEOLITE ;  P-XYLENE
语种: 英语
WOS记录号: WOS:000295706400007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115346
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Liu, Kefeng,Xie, Sujuan,Liu, Shenglin,et al. Catalytic role of different pore systems in MCM-49 zeolite for liquid alkylation of benzene with ethylene[J]. JOURNAL OF CATALYSIS,2011,283(1):68-74.
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