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    Understanding the doping effect toward the design of CO2-tolerant perovskite membranes with enhanced oxygen permeability

    Access Status
    Fulltext not available
    Authors
    Zhang, Z.
    Chen, D.
    Dong, F.
    Xu, X.
    Hao, Y.
    Shao, Zongping
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhang, Z. and Chen, D. and Dong, F. and Xu, X. and Hao, Y. and Shao, Z. 2016. Understanding the doping effect toward the design of CO2-tolerant perovskite membranes with enhanced oxygen permeability. Journal of Membrane Science. 519: pp. 11-21.
    Source Title
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2016.07.043
    ISSN
    0376-7388
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/7705
    Collection
    • Curtin Research Publications
    Abstract

    Most perovskites possessing high oxygen permeability always suffer from low chemical stability under CO2-containing conditions. A comprehensive knowledge for improving the resistance toward CO2 through doping strategy is still lacking. In this work, we propose a series of perovskite oxides, i.e., SrFe0.8M0.2O3-d (M=Ti4+, Nb5+, and Cr6+), and systematically investigate the effect of dopants with the high oxidation state on the phase structure, chemical stability, sintering behavior, conducting properties, and oxygen permeability. The oxygen permeability and the CO2 tolerance of the membranes are closely related to the oxidation state of the dopants for altering the oxygen vacancy concentration, the oxidation state of Fe ions and the average metal-oxygen bond energy. The balance of oxygen permeability and the CO2 tolerance should be taken into account during practical application. This work thus provides useful guidelines for the future development of perovskite oxides through B-site doping for efficient air separation.

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