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    Robust ion-transporting ceramic membrane with an internal short circuit for oxygen production

    Access Status
    Fulltext not available
    Authors
    Zhang, K.
    Liu, Lihong
    Shao, Zongping
    Xu, R.
    Diniz da Costa, J.
    Wang, Shaobin
    Liu, Shaomin
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhang, Kun and Liu, Lihong and Shao, Zongping and Xu, Rong and Diniz da Costa, João C. and Wang, Shaobin and Liu, Shaomin. 2013. Robust ion-transporting ceramic membrane with an internal short circuit for oxygen production. Journal of Materials Chemistry A. 1: pp. 9150-9156.
    Source Title
    Journal of Materials Chemistry A
    DOI
    10.1039/c3ta11427a
    ISSN
    2050-7488
    URI
    http://hdl.handle.net/20.500.11937/15258
    Collection
    • Curtin Research Publications
    Abstract

    In this work, a novel membrane configuration with an internal short circuit is proposed for air separation based on the fundamental understanding of the working principles of solid oxide fuel cells. The key idea is to use inherently robust ion conducting ceramic membranes to overcome the problem of the low material stability of the existing ceramic membranes under the real application conditions. To experimentally demonstrate this novel design, samarium-doped ceria (SDC) was synthesized and used as the membrane material. Oxygen permeation results clearly demonstrated that one internal short circuit in the membrane was sufficient to enable the membrane to function, thus simplifying the planar membrane design for future scaling up. In addition, the robustness of the membranes was proved by long term exposure to acid gases (CO2 and CO2/H2O) as O2 fluxes reverted back to their original values of 0.4 ml min−1 cm−2 once these acid gases were switched off. Tested under similar conditions, high O2 flux through conventional perovskite membranes failed, thus clearly indicating the potential adaptability of the novel SDC membrane to real world industrial application.

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