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    Lithium silicate based membranes for high temperature CO2 separation

    19434_downloaded_stream_526.pdf (802.9Kb)
    Access Status
    Open access
    Authors
    Yamaguchi, T.
    Niitsuma, T.
    Nair, Balagopal
    Nakagawa, K.
    Date
    2007
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Yamaguchi, Takeo and Niitsuma, Takuya and Nair, Balagopal and Nakagawa, Kazuaki. 2007. Lithium silicate based membranes for high temperature CO2 separation. Journal of Membrane Science 294: 16-21.
    Source Title
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2007.01.028
    Faculty
    Department of Applied Chemistry
    Division of Engineering, Science and Computing
    Faculty of Science
    Remarks

    This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

    URI
    http://hdl.handle.net/20.500.11937/28732
    Collection
    • Curtin Research Publications
    Abstract

    Processing and characterisation of a novel membrane system for CO2 separation is detailed. The membrane was made of Lithium Orthosilicate (Li4SiO4), which has potential to react with CO2 molecules reversibly at high temperature. Using the membrane, a separation factor of 5.5 was measured between CO2 and N2 gas molecules at a temperature of 525C. The gas permeance value through the membrane at 525C was around 10-8 mol/m2 s Pa. Ionic diffusion through the liquid phase electrolyte and solid phase skeleton, produced by the reaction between CO2 and Li4SiO4,was suggested to assist the selective permeance of CO2. This facilitation effect was experimentally identified by examining the variation in CO2 flux with partial pressure. Oxygen ion conductivity through the skeleton material, Li2SiO3, is reportedly very high and therefore charge balance should have been achieved by O2- transfer through the skeleton.

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