Preparation, characterization and gas permeation properties of PDMS/PEI composite asymmetric membrane for effective separation of hydrogen from H2/CH4 mixed gas

被引：37
|
作者：
Shamsabadi, Ahmad Arabi [1 ,2 ]
Kargari, Ali [3 ]
Babaheidari, Masoud Bahrami [1 ]
机构：
[1] Petr Univ Technol, Ahvaz, Iran
[2] Marun Petrochem Co, Mahshahr, Iran
[3] Amirkabir Univ Technol, Tehran Polytech, Dept Petrochem Engn, MPRL, Mahshahr, Iran
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 03期
关键词：
PDMS/PEI; Permeance; Selectivity; Non-solvent; Coating; HOLLOW-FIBER MEMBRANES; POLYMERIC MEMBRANES; POLYETHERIMIDE; ECONOMY; PERFORMANCE; PURE; IMPROVEMENT; MORPHOLOGY; MIXTURES; BEHAVIOR;
D O I：
10.1016/j.ijhydene.2013.11.004
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, PDMS/PEI membranes were synthesized and sorption and permeation of H-2/CH4 mixture were studied. The influence of pressure, temperature and feed composition were investigated. It was shown that permeances increased and selectivity decreased with an increment in the feed temperature. Increasing feed pressure caused a decline in gas permeance and increased selectivity. Higher concentrations of hydrogen in the feed declined the selectivity. The effect of different non-solvents was explained by their effect on precipitation time and it was concluded that water made the membrane denser while isopropanol forms a sponge-like structure. Coagulation bath temperature made the membrane denser. Film casting and dip-coating techniques were used to prepare selective membranes. Obtained selectivity results introduced dip-coating as a better method than film casting. Sequential coating improved selectivity of the prepared membrane. Finally, sequential coating with different concentrations was applied and enhanced selectivity significantly from about 22 to more than 70. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1410 / 1419
页数：10
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