二氧化碳的超电容变压捕集研究进展

Supercapacitive Swing Adsorption of Carbon Dioxide:A Review

近年来,通过电化学电解技术将二氧化碳(CO_(2))转化为高值化学品的研究得到了广泛关注,但相关研究主要使用高纯CO_(2)作为原料气。因此,在常温常压下高效捕获和分离空气、烟道气等混合气体中的CO_(2)是实现CO_(2)资源化利用的关键挑战之一。超电容变压捕集(SSA)技术是一种以清洁电能作为驱动力,通过超级电容器的充放电过程对CO_(2)实现选择性吸附和脱附,从而从不同浓度的混合气体中分离纯化CO_(2)的新兴技术。该技术较其他分离技术而言具有操作简单、能耗低、无污染等优势,有望成为新一代的CO_(2)捕集和分离技术。然而SSA体系的相关研究目前仍然较少,且存在诸如CO_(2)吸附性能差、反应机理不明晰等缺点,限制了它的市场化、规模化实际应用。本文详细总结了近期所报道的SSA体系中的CO_(2)吸附机制、装置结构设计以及相关性能指标,从多个角度分析了影响SSA性能的因素,并总结了目前SSA体系存在的问题,希望能够为未来本领域的相关研究提供参考。

Recently,the electrochemical conversion of carbon dioxide(CO_(2))into high-value chemicals has gained significant attention.However,most studies have focused on using high-purity CO_(2)as the feed gas,overlooking the challenges associated with processing more readily available mixed gas streams such as air and flue gas under ambient conditions.One innovative approach addressing this gap is the supercapacitive swing absorption(SSA)technology.Powered by clean electrical energy,SSA achieves selective CO_(2)adsorption and desorption during the charge and discharge cycles of supercapacitors,thereby enabling the effective separation and purification of CO_(2)from gases of varying concentrations.SSA technology is distinguished by its operational simplicity,low energy consumption,and environmental friendliness,marking it as a viable candidate for next-generation CO_(2)capture and separation techniques.Despite its potential,the research about SSA is still at an early stage and is hampered by limitations such as inadequate CO_(2)adsorption capacity and ambiguous reaction mechanisms.These issues pose significant barriers to the commercialization and broader application of SSA technologies.This paper presents a detailed review of the recent advancements in SSA technology,including reaction mechanisms,device design,and performance metrics.It critically analyzes the factors affecting SSA performance from multiple perspectives and concludes by identifying the current challenges within SSA systems.The goal is to offer a thorough guide that will illuminate future research in this emerging area.