College of Chemical Engineering and Environment, China University of Petroleum (Beijing)
College of Science, China University of Petroleum (Beijing)

传统工业过程,尤其是依赖于煤炭、石油和天然气等化石燃料的生产活动,导致了CO2的高浓度排放。工业烟气中的CO2治理是降低重点行业污染排放、打好污染防治攻坚战的重中之重。近年来,我国在降污减碳方面取得了显著成果。光催化CO2还原技术以直接利用清洁的太阳能和在室温下进行反应等诸多优势,目前广泛应用于CO2资源化利用。在过去的几十年里,研究者致力于提高光催化CO2转化的活性研究。然而,关于提高该过程选择性的研究相对缺乏,特别是关于高价值C2+产品的生成。鉴于当前的研究趋势和新兴技术,首先阐述了目前应用广泛的CO2资源化利用技术并进行了对比分析,接着阐明该反应中C—C偶联的热力学限制、动力学特征、光催化剂表面活化基本原理和机制,进而概述目前可用提高C2+产物选择性的技术,并综述了各技术目前存在的缺点。最后,总结了目前研究现状并指明了现存的问题,并对该领域的未来前景和工业化应用做出了指引。

Traditional industrial processes, especially those that rely on fossil fuels such as coal, oiland gas, result in high levels of CO emissions. Capturing and utilizing CO from industrial flue gas hasbecome a top priority for reducing pollution emissions in key industries. In recent years, remarkableprocess in eliminating pollution and reducing CO have been made. Photocatalytic CO reduction tech⁃nology has been widely used due to the advantages of direct use of clean solar energy resource and themoderate room temperature reaction condition. Over the past few decades, a wide variety of photocata⁃lysts which have excellent performance have been developed. However, there is a notable research defi⁃ciency on improving the selectivity of high-value C products. In view of the research trends and theapplication of new technologies, this paper describes multiple technical routes and their comparativeanalysis of CO utilization firstly. Then we illustrates the thermodynamic limitations, kinetic characteris⁃tics, the basic principle and mechanism of C—C coupling, the current technologies that can enhance theC selectivity, and their existing shortcomings. Finally, we present the research process, point out the ex⁃isting problems, and provide guidance for the future prospects and industrial applications of this field.

国家重点研发计划资助项目(2022YFB3504100);国家自然科学基金资助项目(22376217);北京市新星计划资助项目(20220484215)

刘昶,李炫贞,韦岳长.光催化CO2还原成C2+产物催化剂及其反应机理研究进展[J].能源环境保护,2024,38(4):67-77.

LIU Chang, LI Xuanzhen, WEI Yuechang. Photocatalysis CO2 reduction reaction to C2+ products catalyst and con⁃version fundamental mechanisms: A review[J]. Energy Environmental Protection, 2024, 38(4): 67-77.