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Issue 21, 2020
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Thermochemical energy storage properties of a barium based reactive carbonate composite

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Abstract

This study introduces a new concept of reactive carbonate composites (RCCs) for thermochemical energy storage, where a BaCO3–BaSiO3 mixture offers a successful thermodynamic destabilisation of BaCO3 with moderate cyclic stability ∼60%, close to the theoretical maximum when considering unreactive impurities. This research presents an alternative to molten salt based energy storage technology that operates at higher temperature (850 °C) and hence maintains a higher Carnot efficiency at a competitive price level, enabling the development of a thermal energy storage system more favourable than state-of-the-art technology. Finally, the addition of catalytic quantities of CaCO3 to the RCC significantly improves the reaction kinetics (one order of magnitude) through the formation of intermediate Ba2−xCaxSiO4 compounds, which are hypothesised to facilitate Ba2+ and O2− mobility through induced crystal defects.

Graphical abstract: Thermochemical energy storage properties of a barium based reactive carbonate composite

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Supplementary files

Article information


Submitted
03 Apr 2020
Accepted
13 May 2020
First published
14 May 2020

J. Mater. Chem. A, 2020,8, 10935-10942
Article type
Paper

Thermochemical energy storage properties of a barium based reactive carbonate composite

K. T. Møller, K. Williamson, C. E. Buckley and M. Paskevicius, J. Mater. Chem. A, 2020, 8, 10935
DOI: 10.1039/D0TA03671D

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