Abstract
Abstract The reversible reduction and oxidation (RedOx) reactions of CuO/Cu2O, Co3O4/CoO, Mn2O3/Mn3O4, and Pb3O4/PbO have been assessed experimentally with thermogravimetric Analysis (TGA). The temperature was maintained constant during charging and discharging of the thermochemical energy storage via pressure swing for a range of oxygen partial pressures spanning from 0.05 to 0.8 bar. The rate of oxidation reactions were assessed for a range of partial pressures, while changes to the structure of the materials was assessed with X-Ray diffraction spectra (XRD) before and after 10 successive reduction and oxidation cycles. The results show that the Co3O4/CoO, Mn2O3/Mn3O4, and CuO/Cu2O pairs have a potential for chemical storage at temperatures ranges from 900 °C to 1000 °C, while no thermochemical reaction was observed for Pb3O4 up to a temperature of 550 °C.
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