期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 40, 期 8, 页码 3249-3258出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2015.01.021
关键词
Alumina hollow fibre; Asymmetric structure; Palladium membrane; Hydrogen separation
资金
- EPSRC in the United Kingdom [EP/1010947/1]
- Conselho Nacional de Pesquisa e Desenvolvimento (CNPq) [237626/2012-8]
- Engineering and Physical Sciences Research Council [EP/I010947/1] Funding Source: researchfish
- EPSRC [EP/I010947/1] Funding Source: UKRI
In this study, a highly permeable ceramic hollow fibre substrate has been fabricated for developing Pd composite membranes. The substrate consists of one thin outer sponge-like layer for depositing Pd membranes by electroless plating and a plurality of self-organized micro-channels for reducing gas permeation resistance. A dense defect-free Pd membrane with approximately 1 gm was formed on the outer surface of the sponge-like layer, which suggests a great uniformity of the substrate. As a result, a hydrogen permeation flux of 0.87 mol s(-1) m(-2) can be achieved at 450 degrees C and 165 KPa. Hydrogen permeation of the several composite membranes with different Pd thicknesses (1.0 and 3.3 mu m) and different substrates sintered at different temperatures (1300 and 1400 degrees C) was also investigated. It was found that an intermediate layer, which is normally formed due to the Pd penetration during the electroless plating, shows an adverse effect in hydrogen permeation, especially when the Pd membrane is very thin. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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