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    Bi-functional performances of BaCe0.95Tb0.05O3−δ-based hollow fiber membranes for power generation and hydrogen permeation

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    Authors
    Meng, X.
    Shang, Y.
    Meng, B.
    Yang, N.
    Tan, X.
    Sunarso, J.
    Liu, Shaomin
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Meng, X. and Shang, Y. and Meng, B. and Yang, N. and Tan, X. and Sunarso, J. and Liu, S. 2016. Bi-functional performances of BaCe0.95Tb0.05O3−δ-based hollow fiber membranes for power generation and hydrogen permeation. Journal of European Ceramic Society. 36 (16): pp. 4123-4129.
    Source Title
    Journal of European Ceramic Society
    DOI
    10.1016/j.jeurceramsoc.2016.06.041
    ISSN
    0955-2219
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/38174
    Collection
    • Curtin Research Publications
    Abstract

    Hydrogen separation and conversion to electricity are the two key processes in hydrogen economy. Here, a bi-functional BaCe0.95Tb0.05O3-δ (BCTb) coated NiO-BCTb hollow fiber is reported. Below 700 °C, BCTb has dominant proton conductivity while above 700 °C, the electronic conductivity becomes more significant, showing apparent behavior change from proton to mixed proton-electronic conductor. This enables its applicability as an electrolyte in solid oxide fuel cell (SOFC) below 700 °C and as a hydrogen permeation membrane beyond 700 °C. Microtubular SOFC showed a maximum power density of 552 mW cm−2 at 700 °C. Hydrogen permeation membrane demonstrated the highest flux of 0.53 mL min−1 cm−2 at 850 °C. The transition from proton to mixed protonic-electronic conductor was substantiated by the abrupt reduction in the open circuit voltage of the SOFC operated above 700 °C and in the protonic transport number from 0.94 to 0.81 with the temperature rise from 700 to 850 °C.

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