Details

Autor(en) / Beteiligte

• Williamson, Kyran
• Møller, Kasper T
• D'Angelo, Anita M
• Humphries, Terry D
• Paskevicius, Mark
• Buckley, Craig E

Titel

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

Ist Teil von

• Physical chemistry chemical physics : PCCP, 2023-03, Vol.25 (1), p.7268-7277

Ort / Verlag

England: Royal Society of Chemistry

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Renewable energy requires cost effective and reliable storage to compete with fossil fuels. This study introduces a new reactive carbonate composite (RCC) where Fe 2 O 3 is used to thermodynamically destabilise BaCO 3 and reduce its decomposition temperature from 1400 °C to 850 °C, which is more suitable for thermal energy storage applications. Fe 2 O 3 is consumed on heating to form BaFe 12 O 19 , which is a stable Fe source for promoting reversible CO 2 reactions. Two reversible reaction steps were observed that corresponded to, first, the reaction between -BaCO 3 and BaFe 12 O 19 , and second, between γ-BaCO 3 and BaFe 12 O 19 . The thermodynamic parameters were determined to be Δ H = 199 ± 6 kJ mol −1 of CO 2 , Δ S = 180 ± 6 J K −1 mol −1 of CO 2 and Δ H = 212 ± 6 kJ mol −1 of CO 2 , Δ S = 185 ± 7 J K −1 mol −1 of CO 2 , 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. A thermochemical battery can store various energy sources and provide heat on demand to generate electricity.