Effect of nickel deposition on hydrogen permeation behavior of mesoporous gamma-alumina composite membranes
- Authors
- Yu, Chang-Yeol; Sea, Bong-Kuk; Lee, Dong-Wook; Park, Sang-Jun; Lee, Kwan-Young; Lee, Kew-Ho
- Issue Date
- 15-3월-2008
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- composite membrane; nickel; hydrogen separation; surface diffusion
- Citation
- JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.319, no.2, pp.470 - 476
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF COLLOID AND INTERFACE SCIENCE
- Volume
- 319
- Number
- 2
- Start Page
- 470
- End Page
- 476
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/123896
- DOI
- 10.1016/j.jcis.2007.11.056
- ISSN
- 0021-9797
- Abstract
- Ni/alumina composite membranes were prepared and investigated for hydrogen separation at high temperature. cl-Alumina-supported gamma-alumina composite membranes were prepared by soaking-rolling method. In order to improve H-2 selectivity and permeance of the gamma-alumina membranes, Ni was deposited by a soaking process. As a result of a single gas permeation test of the Ni/alumina composite membranes, hydrogen permeance and H-2/N-2 selectivity at permeation temperature of 450 degrees C were 6.29 x 10(-7) mol/m(2) s Pa and 5.2 which exceeded theoretical Knudsen selectivity. Contribution of surface diffusion was investigated by temperature dependence of H-2 permeance. The surface diffusion was observed at higher temperature above 250 degrees C. The Ni deposition on surface of the gamma-alumina composite membrane led to hydrogen permeation via Knudsen diffusion combined with surface diffusion, which gave high H-2 selectivity exceeding the Knudsen diffusion mechanism. (C) 2007 Elsevier Inc. All rights reserved.
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