Investigation on Synthesis of CeO<sub>2</sub>-stabilized CaO/CuO Composite Nanospheres and Their Thermochemical Energy Storage Characteristics

CHEN Jian; LI Youshi; LU Xinyuan; TANG Hedan; CHEN Feiqiang; HE Junjie; LI Yong; SUN Shichao

doi:10.6054/j.jscnun.2024022

Journal of South China Normal University (Natural Science Edition) > 2024 > 56(2): 55-61. > DOI: 10.6054/j.jscnun.2024022

CHEN Jian, LI Youshi, LU Xinyuan, TANG Hedan, CHEN Feiqiang, HE Junjie, LI Yong, SUN Shichao. Investigation on Synthesis of CeO₂-stabilized CaO/CuO Composite Nanospheres and Their Thermochemical Energy Storage Characteristics[J]. Journal of South China Normal University (Natural Science Edition), 2024, 56(2): 55-61. DOI: 10.6054/j.jscnun.2024022

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Investigation on Synthesis of CeO₂-stabilized CaO/CuO Composite Nanospheres and Their Thermochemical Energy Storage Characteristics

1.
School of Automotive Engineering, Changshu Institute of Technology, Suzhou 215500, China
2.
China Energy Engineering Group Jiangsu Power Design Institute Co. Ltd., Nanjing 211102, China

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Received Date: April 17, 2024
Available Online: June 21, 2024

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Abstract

Abstract

An integrated Ca/Cu looping thermochemical heat storage process was proposed, employing cyclic calcination/reduction-oxidation-carbonation reactions of CaO/CuO composite materials for hydrogen energy storage. In the energy storage stage, the calcination/reduction reaction occurred between hydrogen and CaO/CuO composite materials, storing hydrogen energy as the thermochemical energy of these materials. In the subsequent energy release stage, the CaO/CuO composite materials underwent oxidation and carbonation reactions stepwise with air and CO₂, releasing the previously stored thermochemical energy as heat. For the CaO/CuO composite materials in the proposed process, a two-step synthesis method was used to prepare CeO₂-stabilized CaO/CuO composite nanospheres. The effect of CeO₂ content on the CaO/CuO composite pellets was studied in a fixed-bed reactor. The results show that all of the CeO₂-stabilized CaO/CuO composite nanospheres exhibited stable oxidation performance over ten cycles. However, the CeO₂ content had a significant impact on the carbonation performance of CeO₂-stabilized CaO/CuO composite nanospheres. With an increase in the CeO₂ content from 20% to 60%, the initial carbonation performance of CaO/CuO composite nanospheres decreased significantly from 0.092 g/g to 0.017 g/g.
- energy storage,
- chemical looping,
- composite material,
- stabilizer

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References (14)

References

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