Study of crystallization process of SAPO-11 molecular sieve

	Study of crystallization process of SAPO-11 molecular sieve
	Li Bing 1; Tian Peng 1; Qi Yue 1; Zhang Lin 1; Xu Shutao 1; Su Xiong 1,2; Fan Dong 1,2; Liu Zhongmin 1
刊名	chinese journal of catalysis
	2013-03-01
卷号	34 期号:3 页码:593-603
关键词	SAPO-11 molecular sieve Characterization Crystallization process Silicon distribution
ISSN号	10.1016/s1872-2067(12)60542-7
通讯作者	刘中民
产权排序	待补充
合作状况	英
英文摘要	the crystallization process of sapo-11 was studied using a combination of x-ray diffraction, scanning electron microscopy, x-ray fluorescence, nuclear magnetic resonance, and x-ray photoelectron spectroscopy. in the initial stage of crystallization, sapo-11 was formed along with an unknown crystalline material composed of si-p-al. as crystallization evolved, the crystalline material dissolved. the sapo-11 formation rate increased greatly, which is characteristic of fast crystallization. after 2.33 h, the relative crystallinity of sapo-11 reached similar to 100% and remained at a high level until crystallization was complete. si was incorporated into the sapo-11 framework from the initial stage of crystallization. the si content of the solid samples increased with crystallization time. most of the si atoms existed as si islands in the sapo-11 framework, resulting in the presence of multiple coordination environments, i.e., si(nal, (4 - n)si), n = 0-4. x-ray photoelectron spectroscopy analysis revealed si enrichment on the external surfaces of the sapo-11 crystals. based on the experimental results, the distribution of si in the crystals is not uniform, showing an increasing trend from the core to the surface. (c) 2013, dalian institute of chemical physics, chinese academy of sciences. published by elsevier b.v. all rights reserved.
学科主题	物理化学
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]	dry-gel conversion ; solid-state nmr ; microporous aluminophosphate alpo4-11 ; hydroisomerization performance ; si distribution ; crystals ; catalysts ; media
收录类别	SCI
资助信息	1，1
原文出处	603
语种	英语
WOS记录号	WOS:000317873600014
公开日期	2014-09-11
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/119396]
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 Natl Lab Clean Energy, Natl Engn Lab Methanoltoolefins, 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	Li Bing,Tian Peng,Qi Yue,et al. Study of crystallization process of SAPO-11 molecular sieve[J]. chinese journal of catalysis,2013,34(3):593-603.
APA	Li Bing.,Tian Peng.,Qi Yue.,Zhang Lin.,Xu Shutao.,...&Liu Zhongmin.(2013).Study of crystallization process of SAPO-11 molecular sieve.chinese journal of catalysis,34(3),593-603.
MLA	Li Bing,et al."Study of crystallization process of SAPO-11 molecular sieve".chinese journal of catalysis 34.3(2013):593-603.