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    Development of tubular substrates, silica based membranes and membrane modules for hydrogen separation at high temperature

    Access Status
    Fulltext not available
    Authors
    Nair, Balagopal
    Yoshino, Y.
    Suzuki, T.
    Taguchi, H.
    Itoh, N.
    Date
    2005
    Type
    Journal Article
    
    Metadata
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    Citation
    Nair, Balagopal and Yoshino, Yasushi and Suzuki, Takehiro and Taguchi, Hisatomi and Itoh, Naotsugu. 2005. Development of tubular substrates, silica based membranes and membrane modules for hydrogen separation at high temperature. Journal of Membrane Science 267: 8-17.
    Source Title
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2005.05.020
    Faculty
    Department of Applied Chemistry
    Division of Engineering, Science and Computing
    Faculty of Science
    URI
    http://hdl.handle.net/20.500.11937/18726
    Collection
    • Curtin Research Publications
    Abstract

    Microporous membranes and membrane modules have been developed for high temperature separation of hydrogen from other gas molecules. Tubular alpha alumina substrate with 0.7 m pore size and 40% porosity was prepared as the membrane substrate and an intermediate alpha alumina layer with pore size of 60 nm and porosity of 39% was formed by dip-coating over the substrate. The gas permeation characteristics as well as the stability of the substrate itself and that with the intermediate layer were respectively evaluated. A procedure of preparing defect-less gamma alumina and silica layers over the substrate was applied to make a highly selective membrane for hydrogen gas. Hydrogen gas permeation values in the range 5E-8 to 5E-6 mol/m2 s Pa with H2/N2 ideal separation factors in the range 30?300 have been measured with the silica membranes. Alumina substrate tubes were also used for fabrication of a tubular bundle, using glass-based sealant materials for joining the substrate tubes to a ceramic endplate. The bundle also was used as a support for silica membrane making. The gas permeation and separation performance of the membrane module was evaluated.

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