Preparation and gas permeation of supported γ-Al2O3 membranes used as substrate layer for microporous membranes

被引：0
|
作者：
Wei, Q [1 ]
Li, JL
Song, CL
机构：
[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China
[2] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100022, Peoples R China
来源：
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2005年 / 20卷 / 03期
关键词：
supported gamma-Al2O3 membranes; hydrogen separation; gas transport;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
gamma-Al2O3 membranes were successfully deposited on the top of porous alpha-Al2O3 support by sol-gel process and characterized by means of XRD, SEM, N-2 adsorption and gas permeation. The gamma-Al2O3 membranes, free of pin-holes and cracks, adhere tightly to the supports and have a thickness of about 7 mu m. When sintered at 400 degrees C, gamma-Al2O3 membranes have a narrow pore size distribution, with a pore diameter of 3.6nm, and the transport of both H-2 and CO2 in supported gamma-Al2O3 membrane is governed by Knudsen mechanism, with H-2 permeance of 3.3 x 10(-1) molm(-2) Pa-1 s(-1) and H-2/CO2 permselectivity close to the ideal Knudsen value at 50 degrees C. The gamma-Al2O3 membranes are suitable for being used as the substrates of microporous membranes.
引用
收藏
页码：27 / 30
页数：4
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