Cordierite-supported ZSM-5 membrane: Preparation and pervaporation properties in the dehydration of water–alcohol mixture

The ZSM-5 type membrane was prepared on a flat cordierite support by low temperature chemical vapor deposition (LTCVD) of a silica layer, followed by an in situ crystallization in vapor phase. The membrane obtained consisted of loosely-packed zeolite crystals in the pores of the support. The silica–...

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Bibliographic Details
Published in:Separation and purification technology 2005-08, Vol.44 (3), p.266-270
Main Authors: Zhou, Lizhi, Wang, Tao, Nguyen, Quang Trong, Li, Jun, Long, Yingcai, Ping, Zhenghua
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Cordierite
Crystallization, leaching, miscellaneous separations
Exact sciences and technology
Membrane separation (reverse osmosis, dialysis...)
Pervaporation
Vapor deposition
Water–alcohol separation
ZSM-5 membrane
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Summary:The ZSM-5 type membrane was prepared on a flat cordierite support by low temperature chemical vapor deposition (LTCVD) of a silica layer, followed by an in situ crystallization in vapor phase. The membrane obtained consisted of loosely-packed zeolite crystals in the pores of the support. The silica–alumina ratio of the membrane zeolite layer determined by EDX was low, indicating a hydrophilic nature of the membrane. The performances of the ZSM-5 membrane in the separation of water–alcohol mixtures by pervaporation were studied and discussed with respect to the membrane structure and the alcohol nature. The membrane showed very high selectivity towards water in the water–ethanol mixture. The transport mechanism of the membrane has also been discussed.
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2004.12.016