Effect of MFI zeolite intermediate layers on gas separation performance of carbon molecular sieve (CMS) membranes

被引：29

作者：

Wey, Ming-Yen ^{[1
]}

Tseng, Hui-Hsin ^{[2
,3
]}

Chiang, Chian-kai ^{[2
,3
]}

机构：

[1] Natl Chung Hsing Univ, Dept Environm Engn, Taichung 40227, Taiwan

[2] Chung Shan Med Univ, Sch Occupat Safety & Hlth, Taichung, Taiwan

[3] Chung Shan Med Univ Hosp, Dept Occupat Med, Taichung, Taiwan

来源：

JOURNAL OF MEMBRANE SCIENCE | 2013年 / 446卷

关键词：

Gas separation; Carbon membrane; Support; MFI zeolite; Molecular sieve; PALLADIUM MEMBRANES; CERAMIC SUPPORT; SIZE; FLUX;

D O I：

10.1016/j.memsci.2013.06.051

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

To strengthen interfacial adhesion between selective carbon molecular sieve (CMS) layers and alpha-Al2O3 substrates, mordenite framework inverted (MFI)-type intermediate layers were synthesized to reduce pore sizes and improve chemical characteristics of underlying substrates and consequently facilitate formation of CMS layers. MFI-type zeolite intermediate layers were prepared on alpha-Al2O3 substrates via secondary growth of seeds to form polycrystalline zeolite layers with a-oriented crystallites. These crystallites increased cross-link strength between separation layers as well as gas pair separation performance. When a porous substrate was treated with silica seeds and covered with an MFI intermediate layer, CMS selectivity for H-2/CH4 increased to 260.9 with permeability towards H-2 of 2224 Barrer. These modifications improved the mechanical stability of CMS layers and will assist in their commercialization. (C) 2013 Published by Elsevier B.V.

引用

页码：220 / 229

页数：10

共 35 条

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