Vapor-phase silylation of MCM-22 zeolite with various SiO2/Al2O3 molar ratios

	Vapor-phase silylation of MCM-22 zeolite with various SiO2/Al2O3 molar ratios
	Gao Ningning 1,2; Xie Sujuan 1; Liu Shenglin 1; Liu Kefeng 1,2; Li Xiujie 1; Xu Longya 1
刊名	chinese journal of catalysis
	2013-03-01
卷号	34 期号:3 页码:612-619
关键词	MWW structure MCM-22 zeolite silylation interlayer expansion density functional theory
英文摘要	mcm-22 precursor with various sio2/al2o3 molar ratios was treated by vapor-phase silylation. mcm-22 zeolite and its products of vapor-phase silylation were characterized by x-ray diffraction, solid state nuclear magnetic resonance, n-2 adsorption-desorption, and toluene adsorption techniques. the results showed that si(oh)(2) pillaring structure was formed in the interlayer of mcm-22 with sio2/al2o3 molar ratios of 50-100 without extraction of framework aluminum through vapor-phase silylation, resulting in the expansion of interlayer distance and the increase of micropore volume. the n-2 adsorption-desorption isotherms of mcm-22 zeolite before and after silylation were analyzed by the density functional theory, and the specific surface area and pore volume of 10 member ring (10 mr) rnicropores and those of the supercage system were successfully obtained. as a result of vapor-phase silylation, the specific surface area and pore volume of the supercage system increased, while those of 10 mr micropores decreased. the equilibrium adsorption amount of toluene over mcm-22 zeolite with various sio2/al2o3 molar ratios was enhanced after vapor-phase silylation.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, applied ; chemistry, physical ; engineering, chemical
研究领域[WOS]	chemistry ; engineering
关键词[WOS]	pillared molecular-sieve ; si-29 mas-nmr ; surface-area ; catalysts ; alkylation ; disproportionation ; microporosity ; precursors ; benzene ; toluene
收录类别	SCI
语种	英语
WOS记录号	WOS:000317873600016
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/137894]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Gao Ningning,Xie Sujuan,Liu Shenglin,et al. Vapor-phase silylation of MCM-22 zeolite with various SiO2/Al2O3 molar ratios[J]. chinese journal of catalysis,2013,34(3):612-619.
APA	Gao Ningning,Xie Sujuan,Liu Shenglin,Liu Kefeng,Li Xiujie,&Xu Longya.(2013).Vapor-phase silylation of MCM-22 zeolite with various SiO2/Al2O3 molar ratios.chinese journal of catalysis,34(3),612-619.
MLA	Gao Ningning,et al."Vapor-phase silylation of MCM-22 zeolite with various SiO2/Al2O3 molar ratios".chinese journal of catalysis 34.3(2013):612-619.