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Engineering >> 2023, Volume 21, Issue 2 doi: 10.1016/j.eng.2022.02.016

CO2 High-Temperature Electrolysis Technology Toward Carbon Neutralization in the Chemical Industry

a SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, China

b Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

c Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Received:2021-09-03 Revised:2021-11-09 Accepted: 2022-02-28 Available online:2022-09-01

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The chemical industry is a major carbon emitter in China and must be focused on for China to achieve its goal of carbon neutralization. CO2 high-temperature electrolysis based on solid oxide electrolysis cells (SOECs) is an important technology to achieve China's carbon emission reduction, peak carbon emission, and carbon neutralization goals. Moreover, this technology can realize the recycling utilization of CO2 and thereby contribute to considerable environmental benefits and potential economic benefits. Thus far, a great deal of progress has been made in CO2 high-temperature electrolysis technology at the laboratory stage and pilot stage, although the large-scale industrial application of this technology still requires further development. This review focuses on recent progress in state-of-the-art cell materials for hightemperature CO2 electrolysis, discusses the future research directions of SOEC technologies, and proposes possible SOEC-coupled chemical industry carbon neutralization solutions.

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