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题名: Cavity Controls the Selectivity: Insights of Confinement Effects on MTO Reaction
作者: Li, Jinzhe1;  Wei, Yingxu1;  Chen, Jingrun1, 3;  Xu, Shutao1;  Tian, Peng1;  Yang, Xiaofeng2;  Li, Bing1;  Wang, Jinbang1, 3;  Liu, Zhongmin1, 2
关键词: MTO ;  Cl chemistry ;  shape selectivity ;  confinement effects ;  selectivity control
刊名: ACS CATALYSIS
发表日期: 2015-02-01
DOI: 10.1021/cs501669k
卷: 5, 期:2, 页:661-665
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Organic reaction intermediates confined in zeolite cavities are very important for product formation during methanol-to-olefins (MTO) conversion; however, direct evidence is still required to understand the particular function of these intermediates. Herein, for the first time, by careful selection of SAPO molecular sieves with different cavity size but identical 8MR pore openings, the reactivity and role of these intermediates played in olefin generation are verified by isotopic tracing method and theoretical calculations based on the observation of two types of carbenium intermediates, polyMB(+) and polyMCP(+), under the real MTO reaction conditions. It demonstrates that cavity size controls the molecular size and reactivity of these confined species, which results in different MTO activity and product selectivity.
关键词[WOS]: METHANOL-TO-HYDROCARBONS ;  ACIDIC ZEOLITE CATALYSTS ;  STATE NMR-SPECTROSCOPY ;  REACTION-MECHANISM ;  SHAPE-SELECTIVITY ;  HEPTAMETHYLBENZENIUM CATION ;  OLEFINS CONVERSION ;  SAPO-34 CATALYST ;  POOL CHEMISTRY ;  CARBENIUM IONS
语种: 英语
WOS记录号: WOS:000349275300021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145970
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, Dalian Natl Lab Clean Energy, Natl Engn Lab Methanol Olefins, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Li, Jinzhe,Wei, Yingxu,Chen, Jingrun,et al. Cavity Controls the Selectivity: Insights of Confinement Effects on MTO Reaction[J]. ACS CATALYSIS,2015,5(2):661-665.
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