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题名: Catalytic cracking of C4 alkenes to propene and ethene: Influences of zeolites pore structures and Si/Al-2 ratios
作者: Zhu, XX;  Liu, SL;  Song, YQ;  Xu, LY
关键词: butene ;  propene ;  ethene ;  catalytic cracking ;  zeolite catalysts
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2005-07-15
DOI: 10.1016/j.apcata.2005.04.050
卷: 288, 期:1-2, 页:134-142
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: Catalytic cracking of butene to propene and ethene was carried out in a continuous plug-flow stainless steel reactor over various zeolites with different pore structures and Si/Al-2 ratios. It was found that the porous structure and acidity of zeolites play important roles in the zeolite performance in the butene cracking process. The smaller the pore size of the zeolite catalysts, the higher the initial selectivities towards propene and ethene and the lower the initial selectivities to C-3-C-4 alkanes. This is attributed to a suppression of the hydrogen transfer reaction of the alkenes. Although high initial selectivities to propene and ethene could be gained on medium-pore zeolites of ZSM-22, ZSM-23, ZSM-35 and on small-pore zeolite SAPO-34, the stabilities of all these zeolites were poor. On the other hand, due to its special structure characteristic, the ZSM-5 zeolite exhibited the best stability in the catalytic cracking of butene among the tested zeolites. MCM-22 also presented a better catalytic performance. Besides the pore structure, the acidity, which was influenced by the Si/Al-2 ratio of the zeolite, was another important factor affecting the performance of the zeolites. By increasing the Si/Al-2 ratio of the ZSM-5 zeolite, the selectivities to propene and ethene and the stabilities were remarkably increased owing to a suppression of secondary reactions. (c) 2005 Elsevier B.V. All rights reserved.
关键词[WOS]: ZSM-5 TYPE ZEOLITE ;  DILUTE ETHENE ;  AROMATIZATION ;  HYDROCARBONS ;  DEACTIVATION ;  CONVERSION ;  AROMATICS ;  MECHANISM ;  ACIDITY ;  COKING
语种: 英语
WOS记录号: WOS:000230685200018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139685
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 Sch, Beijing 100039, Peoples R China

Recommended Citation:
Zhu, XX,Liu, SL,Song, YQ,et al. Catalytic cracking of C4 alkenes to propene and ethene: Influences of zeolites pore structures and Si/Al-2 ratios[J]. APPLIED CATALYSIS A-GENERAL,2005,288(1-2):134-142.
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