Origin of the Low Olefin Production over HZSM-22 and HZSM-23 Zeolites: External Acid Sites and Pore Mouth Catalysis

doi:10.1021/cs400855p

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	Origin of the Low Olefin Production over HZSM-22 and HZSM-23 Zeolites: External Acid Sites and Pore Mouth Catalysis
	Wei, Fang-Fang 1; Cui, Zhi-Min 2; Meng, Xiang-Ju 3; Cao, Chang-Yan 1; Xiao, Feng-Shou 3; Song, Wei-Guo 1
刊名	ACS CATALYSIS
	2014-02-01
卷号	4 期号:2 页码:529-534
关键词	Zsm-22 Zeolite Mto Acid Treatment Coking External Surface Pore Mouth Catalysis
ISSN号	2155-5435
DOI	10.1021/cs400855p
英文摘要	The methanol-to-olefin (MTO) reaction was studied over two one-dimensional 10-ring zeolites with similar pore structures: ZSM-22 (TON) and ZSM-23 (MTT). It was found that the initial low but detectable production of olefins over both zeolites was catalyzed by external and/or pore mouth acid sites through hydrocarbon pool mechanism. Evidence is listed as follows: The uncalcined HZSM-22 had similar MTO activity as the calcined catalyst. The HZSM-22 zeolite with smaller crystal size had higher MTO activity. Both zeolites treated by HNO3 to selectively leach the external acid sites showed significantly reduced initial MTO activity. Both zeolites coked through catalytic cracking of 1,3,5-triisopropylbenzene showed significantly lower initial MTO activity. This conclusion may also be suitable for other one-dimensional zeolites with pore size below 5.7 angstrom in the MTO reaction.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000331164000020
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/51087]
专题	中国科学院化学研究所
通讯作者	Song, Wei-Guo
作者单位	1.Chinese Acad Sci, Inst Chem, Lab Mol Nanostruct & Nanotechnol, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 2.Beijing Univ Aeronaut & Astronaut, Sch Chem & Environm Engn, Beijing 100191, Peoples R China 3.Zhejiang Univ, Key Lab Appl Chem Zhejiang Prov, Hangzhou 310028, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Wei, Fang-Fang,Cui, Zhi-Min,Meng, Xiang-Ju,et al. Origin of the Low Olefin Production over HZSM-22 and HZSM-23 Zeolites: External Acid Sites and Pore Mouth Catalysis[J]. ACS CATALYSIS,2014,4(2):529-534.
APA	Wei, Fang-Fang,Cui, Zhi-Min,Meng, Xiang-Ju,Cao, Chang-Yan,Xiao, Feng-Shou,&Song, Wei-Guo.(2014).Origin of the Low Olefin Production over HZSM-22 and HZSM-23 Zeolites: External Acid Sites and Pore Mouth Catalysis.ACS CATALYSIS,4(2),529-534.
MLA	Wei, Fang-Fang,et al."Origin of the Low Olefin Production over HZSM-22 and HZSM-23 Zeolites: External Acid Sites and Pore Mouth Catalysis".ACS CATALYSIS 4.2(2014):529-534.