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    Thermochemical energy storage in barium carbonate enhanced by iron(iii) oxide

    Access Status
    In process
    Authors
    Williamson, Kyran
    Møller, K.T.
    D’Angelo, A.M.
    Humphries, Terry
    Paskevicius, Mark
    Buckley, Craig
    Date
    2023
    Type
    Journal Article
    
    Metadata
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    Citation
    Williamson, K. and Møller, K.T. and D’Angelo, A.M. and Humphries, T.D. and Paskevicius, M. and Buckley, C.E. 2023. Thermochemical energy storage in barium carbonate enhanced by iron(iii) oxide. Physical Chemistry Chemical Physics. 25 (10): pp. 7268-7277.
    Source Title
    Physical Chemistry Chemical Physics
    DOI
    10.1039/d2cp05745j
    ISSN
    1463-9076
    Faculty
    Faculty of Science and Engineering
    Faculty of Science and Engineering
    Faculty of Science and Engineering
    Faculty of Science and Engineering
    School
    School of Elec Eng, Comp and Math Sci (EECMS)
    School of Elec Eng, Comp and Math Sci (EECMS)
    School of Elec Eng, Comp and Math Sci (EECMS)
    School of Elec Eng, Comp and Math Sci (EECMS)
    URI
    http://hdl.handle.net/20.500.11937/96924
    Collection
    • Curtin Research Publications
    Abstract

    Renewable energy requires cost effective and reliable storage to compete with fossil fuels. This study introduces a new reactive carbonate composite (RCC) where Fe2O3 is used to thermodynamically destabilise BaCO3 and reduce its decomposition temperature from 1400 °C to 850 °C, which is more suitable for thermal energy storage applications. Fe2O3 is consumed on heating to form BaFe12O19, which is a stable Fe source for promoting reversible CO2 reactions. Two reversible reaction steps were observed that corresponded to, first, the reaction between β-BaCO3 and BaFe12O19, and second, between γ-BaCO3 and BaFe12O19. The thermodynamic parameters were determined to be ΔH = 199 ± 6 kJ mol−1 of CO2, ΔS = 180 ± 6 J K−1 mol−1 of CO2 and ΔH = 212 ± 6 kJ mol−1 of CO2, ΔS = 185 ± 7 J K−1 mol−1 of CO2, respectively, for the two reactions. Due to the low-cost and high gravimetric and volumetric energy density, the RCC is demonstrated to be a promising candidate for next generation thermal energy storage.

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