CO_(2)捕集与电化学还原利用集成系统研究综述

Review of Integrated CO_(2)Capture and Electrochemical Reduction Utilization System

CO_(2)捕集可以有效地缓解目前全球的温室效应,而CO_(2)电化学还原利用则被认为是将电力储存在化工品中的关键手段.可是作为碳循环周期中紧密连接的上下游环节,二者的研究大部分都是相互独立的.如果将它们整合为CO_(2)捕集利用集成系统(ICCU),整个碳循环的能量效率和经济效益将会得到明显的提升.本文在简要陈述CO_(2)捕集和电化学还原利用现状的基础上,总结了目前CO_(2)捕集利用集成系统研究的进展,分析了集成系统可能存在的反应机理和能量路径,详细论述了在电极和电解质设计方面所取得的成果.除此之外,相关的技术经济分析和生命周期评估也表明,集成系统具有较高的能量利用率和较少的碳足迹.本文最后总结了目前CO_(2)捕集和电化学还原利用集成系统所存在的机遇和挑战.

CO_(2)capture can effectively relieve the global greenhouse effect,and CO_(2)electrochemical reduction utilization is regarded as a promising strategy to store electricity in chemicals.However,as the most relevant upstream and downstream processes of carbon cycle,most of the researches on them are studied independently.If the two processes are integrated into one,the energy and economic efficiency will be improved remarkably.The paper reviews the advances made in the integrated CO_(2)capture and utilization system(ICCU)so far,as well as the potential reactive mechanism and energetics information.The achievements in the design of electrode and electrolyte for the ICCU are also thoroughly illustrated.In addition,both technology economic analysis and life cycle evaluation show the higher energy efficiency and lower carbon footprints of ICCU.This paper concludes by pointing out the opportunities and challenges in the ICCU.