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Synthesis and Low-Temperature Detemplation of High-Silica MFI Zeolite Membranes
Zhao Shu-Heng1,2; Lang Lin1; Jiang Jun-Fei1,2; Yin Xiu-Li1; Wu Chuang-Zhi1
2016-02-01
发表期刊ACTA PHYSICO-CHIMICA SINICA
卷号32期号:2页码:519-526
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.
文章类型Article
关键词High-silica Mfi Zeolite Membrane Template Removal Low-temperature Hydrocracking Gas Permeation Support
WOS标题词Science & Technology ; Physical Sciences
DOI10.3866/PKU.WHXB201511243
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类目Chemistry, Physical
WOS记录号WOS:000371101900016
引用统计
文献类型期刊论文
条目标识符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
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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.
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