Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Scienceand Engineering, North China Electric Power University

CO2捕集是控制温室气体排放的关键技术之一,电化学CO2还原是关闭人工碳循环的有效途径,但CO2捕集和电化学CO2还原过程均为能源密集型过程。过去的研究将两者视为相互独立的技术和科学领域进行发展。通过直接电解捕集介质(如胺基富液和碳酸氢盐),将上游的碳捕集和下游的电化学还原过程进行集成耦合,可以避免高能耗的捕获介质再生和CO2释放环节,避免CO2的运输和存储操作,降低整体工艺的运行成本,提升整个碳循环的能量效率和经济效益,为节约能源和经济高效地捕集利用CO2提供了一个潜在的解决方案。总结了目前电化学反应性捕集CO2的研究进展,论述了在电极和电解质方面取得的成果,讨论了影响集成电解效率的限制因素,并分析了各类因素的潜在影响机制和可能的反应路径。最后,强调了直接电化学还原捕集介质领域的主要挑战和机遇,并对未来耦合碳捕集与电化学利用过程的发展进行展望。

CO2 capture is a key technology for controlling greenhouse gas emissions. ElectrochemicalCO2 reduction offers an effective method to close the artificial carbon cycle. However, both processesare energy-intensive and have traditionally been treated as separate technical and scientific fields. Re-cent advancements propose integrating upstream carbon capture with downstream electrochemical reduc-tion processes. This integration can be achieved through direct electrolysis of capture media such as anamine-rich solution and bicarbonate. This integration approach offers several benefits, including avoi-ding the energy-intensive regeneration of the capture medium and the release of CO2, eliminating theneed for CO2 transportation and storage, reducing the overall operating costs, and enhancing the energyefficiency and economic benefits of the entire carbon cycle. Consequently, this integrated system pres-ents a promising solution for economically and efficiently capturing CO2 while saving energy. This paperaims to summarize the recent advances in electrochemical reactivity CO2 capture (ERCC), discuss theachievements in electrode and electrolyte development, examine the limiting factors that impact the effi-ciency of integrated electrolysis, and analyze the potential mechanisms and reaction pathwaysinfluenced by various factors. Additionally, the paper highlights the main challenges and opportunitiesin the field of direct electrochemical reduction of capture media and provides a prospective outlook onthe future development of coupled carbon capture and electrochemical utilization processes.

国家自然科学基金资助项目(52325004,22178096);河北省自然科学基金资助项目(B2021502009);中央高校基本科研业务费经费资助项目(2023MS143)

武中志,刘静怡,王茹洁,等.电化学反应性捕集CO2研究进展与挑战[J].能源环境保护,2024,38(3):1-12.

WU Zhongzhi, LIU Jingyi, WANG Rujie, et al. Advances and challenges in electrocatalysis for reactive capture ofCO2[J]. Energy Environmental Protection, 2024, 38(3): 1-12.