Synthesis and Low-Temperature Detemplation of High-Silica MFI Zeolite Membranes

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	Synthesis and Low-Temperature Detemplation of High-Silica MFI Zeolite Membranes
	Zhao Shu-Heng 1,2; Lang Lin1 ; Jiang Jun-Fei 1,2; Yin Xiu-Li1 ; Wu Chuang-Zhi1
刊名	acta physico-chimica sinica
	2016-02-01
卷号	32 期号:2 页码:519-526
关键词	High-silica MFI zeolite membrane Template removal Low-temperature hydrocracking Gas permeation Support
英文摘要	high-silica mfi zeolite membranes supported on porous a-alumina discs were prepared by a seeded secondary growth method, using tetrapropylammonium hydroxide (tpaoh) as organic template. first, nanocrystals were deposited on rough alpha-al2o3 discs by a spin-on process. then, based on controlling the h2o/si molar ratio of the synthetic solution, a restricting in-plane hoh-oriented growth method with an ultra-dilute precursor was designed to prepare non-defective zeolite membranes that were as thin as possible. finally, cross linked and dense mr zeolite membranes were prepared after the third synthesis step, giving a membrane layer thickness of about 8 mu m, including similar to 5 mu m dense layers and 3 pm intermediate layers. a novel, two-step method, coupling by low-temperature hydrocracking and oxidation, is proposed for efficient removal of the template from zeolite membranes. compared with traditional high-temperature calcination, template removal by the two-step method could eliminate the grain boundary defects formed in response to stresses induced by heat treatment. as a result, the membranes treated by the two-step detemplation method displayed a preferable co2/n-2 separation factor (about 5.2) and high co2 permeance (5.8 x 10(-7) mol.m(-2).s(-1.)pa(-1)) at 30 degrees c.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	template-removal ; separation performance ; molecular-sieve ; films ; zsm-5 ; permeation ; hydrocracking ; progress ; growth
收录类别	SCI
语种	英语
WOS记录号	WOS:000371101900016
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/11128]
专题	中国科学院广州能源研究所
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao Shu-Heng,Lang Lin,Jiang Jun-Fei,et al. Synthesis and Low-Temperature Detemplation of High-Silica MFI Zeolite Membranes[J]. acta physico-chimica sinica,2016,32(2):519-526.
APA	Zhao Shu-Heng,Lang Lin,Jiang Jun-Fei,Yin Xiu-Li,&Wu Chuang-Zhi.(2016).Synthesis and Low-Temperature Detemplation of High-Silica MFI Zeolite Membranes.acta physico-chimica sinica,32(2),519-526.
MLA	Zhao Shu-Heng,et al."Synthesis and Low-Temperature Detemplation of High-Silica MFI Zeolite Membranes".acta physico-chimica sinica 32.2(2016):519-526.