0.3 angstrom Makes the Difference: Dramatic Changes in Methanol-to-Olefin Activities between H-ZSM-12 and H-ZSM-22 Zeolites

doi:10.1021/jp209182u

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	0.3 angstrom Makes the Difference: Dramatic Changes in Methanol-to-Olefin Activities between H-ZSM-12 and H-ZSM-22 Zeolites
	Wang, Qiong 1,2; Cui, Zhi-Min 3; Cao, Chang-Yan 1; Song, Wei-Guo 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2011-12-22
卷号	115 期号:50 页码:24987-24992
ISSN号	1932-7447
DOI	10.1021/jp209182u
英文摘要	Two one-dimensional zeolite catalysts with similar pore structures and 0.3 angstrom difference in pore sizes (5.6 angstrom x 6.0 angstrom for H-ZSM-12 and 4.6 angstrom x 5.7 angstrom for H-ZSM-22) were exploited to gauge the critical sizes of the key intermediate species formed during the methanol conversion to olefins. Both zeolite catalysts are characterized by powder X-ray diffraction, scanning electron microscopy, (27)Al solid-state NMR spectroscopy, NH(3) temperature-programmed desorption, and N(2) adsorption/desorption analysis. In the methanol-to-olefin (MTO) process, the hydrocarbon-pool mechanism worked on the H-ZSM-12 zeolite with the 6.0 angstrom pore size, while the catalytic cycle could not be completed inside the H-ZSM-22 zeolite with the smaller 5.7 angstrom pore size. This finding strongly confirms that the hydrocarbon-pool mechanism is a space-demanding process and suggests that the size of key reactive hydrocarbon-pool intermediates for the MTO process is between 5.7 and 6.0 angstrom. These results will provide a strong experimental base for both theoretical and experimental studies in the MTO process.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000297947700068
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/73799]
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.Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China 3.Beijing Univ Aeronaut & Astronaut, Sch Chem & Environm Engn, Beijing 100191, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qiong,Cui, Zhi-Min,Cao, Chang-Yan,et al. 0.3 angstrom Makes the Difference: Dramatic Changes in Methanol-to-Olefin Activities between H-ZSM-12 and H-ZSM-22 Zeolites[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2011,115(50):24987-24992.
APA	Wang, Qiong,Cui, Zhi-Min,Cao, Chang-Yan,&Song, Wei-Guo.(2011).0.3 angstrom Makes the Difference: Dramatic Changes in Methanol-to-Olefin Activities between H-ZSM-12 and H-ZSM-22 Zeolites.JOURNAL OF PHYSICAL CHEMISTRY C,115(50),24987-24992.
MLA	Wang, Qiong,et al."0.3 angstrom Makes the Difference: Dramatic Changes in Methanol-to-Olefin Activities between H-ZSM-12 and H-ZSM-22 Zeolites".JOURNAL OF PHYSICAL CHEMISTRY C 115.50(2011):24987-24992.