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Please use this identifier to cite or link to this item: https://scholars.lib.ntu.edu.tw/handle/123456789/410376
Title: Effect of substrate curvature on microstructure and gas permeability of hollow fiber MFI zeolite membranes
Authors: Chen C.-H.
Meng L.
Tung K.-L. 
Lin Y.S.
Keywords: gas separation;hollow fiber;MFI zeolite;microporous membrane;substrate curvature;thermal expansion mismatch
Issue Date: 2018
Journal Volume: 64
Journal Issue: 9
Start page/Pages: 3419-3428
Source: AIChE Journal 
Abstract: 
Literature data show that gas permeability of MFI zeolite membrane varies depending on the geometry of supports. The present work investigates the effects of the surface curvature of substrates on the microstructure and the gas permeation property of supported zeolite membranes. MFI zeolite membranes were grown on porous alumina hollow fibers with different diameters (surface curvature) by the secondary growth method. Single gas permeation and H 2 /CO 2 binary gas separation from 25 to 300 ¢XC were conducted to study the membrane quality. The zeolite membranes on supports of larger surface curvature have higher permeability and lower selectivity due to the presence of more inter-crystalline gaps in the zeolite layer formed during the template removal step. The effects of the support surface curvature (and geometry) on zeolite membrane microstructure and gas permeation characteristics are semi-quantitatively analyzed by a transport model considering both structural change and gas diffusion in micropores. ? 2018 American Institute of Chemical Engineers AIChE J, 64: 3419¡V3428, 2018. ? 2018 American Institute of Chemical Engineers
URI: https://scholars.lib.ntu.edu.tw/handle/123456789/410376
ISSN: 00011541
DOI: 10.1002/aic.16197
Appears in Collections:化學工程學系

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