Hydrogen selective properties of CsHSO4 based membranes

被引：4

作者：

Bladergroen, Bernard Jan ^{[1
]}

Meyer, Faiek ^{[1
]}

Pasupathi, Sivakumar ^{[1
]}

Linkov, Vladimir ^{[1
]}

机构：

[1] Univ Western Cape, S African Inst Adv Mat Chem, ZA-7535 Bellville, South Africa

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2008年 / 33卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

H-2 selective membranes; CsHSO4; CsHSO4-SiO2; composite; phase dependant gas permeance; proton conductivity; combined diffusion mechanism;

D O I：

10.1016/j.ijhydene.2008.03.068

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：

A new class of HZ selective membrane, based on CsHSO4, was produced using an extremely simple preparation procedure comprising an impregnation-, a drying- and an uniaxial pressing-step. The optimized preparation conditions resulted in membranes showing hydrogen permeance up to 0.2 mu mol s(-1) m(-2) Pa-1 and a permselectivity of 14 and 7 towards H-2:CO2 and H-2:CH4, respectively. All gas permeation experiments were performed between 20 and 180 degrees C. TGA, XRD and impedance spectroscopy were used to identify the various phases of CsHSO4. Interesting is that the hydrogen permeance of the membrane is related to the specific phases of CsHSO4. The gas transport mechanism in CsHSO4-SiO2 composite membranes seems to be a combination of Knudsen diffusion and solution diffusion through the monoclinic phases of CsHSO4. The proton conductive properties of CsHSO4 play an insignificant role in the hydrogen transport through the membrane. (c) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：3031 / 3035

页数：5

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