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题名: The roles of acidity and structure of zeolite for catalyzing toluene alkylation with methanol to xylene
作者: Zhu, ZR;  Chen, QL;  Xie, ZK;  Yang, WM;  Li, C
关键词: zeolite ;  acidity and structure ;  toluene alkylation with methanol ;  toluene methylation ;  xylene
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2006-01-21
DOI: 10.1016/j.micromeso.2005.08.021
卷: 88, 期:1-3, 页:16-21
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: A variety of zeolites, including MOR, MCM-22, SAPO-34, SAPO-11, SAPO-5 and ZSM-5 with different SiO2/Al2O3 ratio, were used for catalyzing toluene alkylation with methanol to produce xylene. The catalytic activity of zeolite for the toluene alkylation is approximately proportional to the number of its mid-strength acidic sites, except for SAPO-34 with small channels and MOR with strong acidity. Moreover, the acidic sites for catalyzing toluene alkylation are weaker in strength than those for catalyzing toluene disproportionation, but slightly stronger than those for catalyzing the reaction of methanol to hydrocarbons. On the other hand, zeolites with 12-membered ring channels may lead to the further alkylation of xylene and the rapid deactivation by coking. Zeolites with 8-membered ring channels restrict toluene alkylation, only favorable for forming non-aromatic hydrocarbons. As a result, zeolites with 10-membered ring channels and mid-strength acidity show high catalytic selectivity and activity for methylation of toluene. (c) 2005 Elsevier Inc. All rights reserved.
关键词[WOS]: MOLECULAR-SIEVE ;  MODIFIED ZSM-5 ;  CATALYSTS ;  MORDENITE
语种: 英语
WOS记录号: WOS:000234774100003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139964
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.Shanghai Res Inst Petrochem Technol, Shanghai 201208, Peoples R China

Recommended Citation:
Zhu, ZR,Chen, QL,Xie, ZK,et al. The roles of acidity and structure of zeolite for catalyzing toluene alkylation with methanol to xylene[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2006,88(1-3):16-21.
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