气候变化领域集成服务门户(CCPortal): Catholyte-free electroreduction of CO2for sustainable production of CO: concept; process development; techno-economic analysis; and CO2reduction assessment

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DOI	10.1039/d0gc02969f
	Catholyte-free electroreduction of CO2for sustainable production of CO: concept; process development; techno-economic analysis; and CO2reduction assessment
	Lee J.; Lee W.; Ryu K.H.; Park J.; Lee H.; Lee J.H.; Park K.T.
发表日期	2021
ISSN	14639262
起始页码	2397
结束页码	2410
卷号	23 期号:6
英文摘要	Electrochemical CO2 reduction (ECO2R) is considered as one of the economically viable means to convert CO2 into useful products, for achieving carbon neutrality in the future. Many studies have been conducted on developing and evaluating electrochemical cells that provide high energy efficiency and conversion of CO2 for CO production via ECO2R. However, commercially feasible technologies are yet to be developed and demonstrated due to various technical limitations as well as the lack of a systematic evaluation framework. In this study, CO production performance is examined by catholyte-free electrochemical CO2 reduction (CF-ECO2R), which eliminates a large ohmic drop by removing the catholyte compartment, thus lowering the energy requirement. The CF-ECO2R shows 0.6 V lower cell voltage and 17.4% higher electrical energy conversion efficiency than a typical GDE-catholyte method using 1 M KOH as the catholyte at a current density of 240 mA cm-2. The obtained results are used to demonstrate its technical feasibility and to provide basic data for the evaluation of a scale-up process. A mathematical model is developed based on the obtained experimental data and the model is simulated along with three different options of downstream separation to provide basic mass and energy balance data. Then, techno-economic and CO2 life cycle analyses are conducted to suggest the best configuration of the overall CO production system in terms of the economics and net CO2 reduction. It is estimated that the best configuration provides a reduction in CO2 emission by 48% compared to the conventional CO production via steam methane reforming. This configuration is also assessed to be economically feasible, giving a production cost (584 USD per ton CO) that is competitive with the current market price of CO. It is also demonstrated that the operating voltage of the CF-ECO2R and regional influences such as CO2 emission intensity and cost of the mixed electricity strongly affect the cost and CO2 emission of the system. This journal is © 2021 The Royal Society of Chemistry.
scopus关键词	Carbon dioxide; Conversion efficiency; Costs; Economic analysis; Electrolytic reduction; Energy efficiency; Petroleum reservoir evaluation; Potassium hydroxide; Steam reforming; Downstream separation; Economically viable; High energy efficiency; Mass and energy balance; Sustainable production; Systematic evaluation; Technical limitations; Techno-Economic analysis; Life cycle
来源期刊	Green Chemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177084
作者单位	Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro Yuseong, Daejeon, 34141, South Korea; Climate Change Research Division, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu Daejeon, 34129, South Korea; Department of Chemical Engineering, Sunchon National University, 225 Jungang-ro, Suncheon Jeollanam-do, 57922, South Korea
推荐引用方式 GB/T 7714	Lee J.,Lee W.,Ryu K.H.,et al. Catholyte-free electroreduction of CO2for sustainable production of CO: concept; process development; techno-economic analysis; and CO2reduction assessment[J],2021,23(6).
APA	Lee J..,Lee W..,Ryu K.H..,Park J..,Lee H..,...&Park K.T..(2021).Catholyte-free electroreduction of CO2for sustainable production of CO: concept; process development; techno-economic analysis; and CO2reduction assessment.Green Chemistry,23(6).
MLA	Lee J.,et al."Catholyte-free electroreduction of CO2for sustainable production of CO: concept; process development; techno-economic analysis; and CO2reduction assessment".Green Chemistry 23.6(2021).