Langie, Kezia Megagita Gerby Tak, Kyungjae Kim, Changsoo Lee, Hee Won Park, Kwangho Kim, Dongjin Jung, Wonsang Lee, Chan Woo Oh, Hyung-Suk Lee, Dong Ki Koh, Jai Hyun Min, Byoung Koun Won, Da Hye Lee, Ung 2024-01-19T10:32:10Z 2024-01-19T10:32:10Z 2023-04-20 2022-12 2041-1723 https://pubs.kist.re.kr/handle/201004/114198 Carbon capture and utilization technology has been studied for its practical ability to reduce CO2 emissions and enable economical chemical production. The main challenge of this technology is that a large amount of thermal energy must be provided to supply high-purity CO2 and purify the product. Herein, we propose a new concept called reaction swing absorption, which produces synthesis gas (syngas) with net-zero CO2 emission through direct electrochemical CO2 reduction in a newly proposed amine solution, triethylamine. Experimental investigations show high CO2 absorption rates (>84%) of triethylamine from low CO2 concentrated flue gas. In addition, the CO Faradaic efficiency in a triethylamine supplied membrane electrode assembly electrolyzer is approximately 30% (@-200 mA cm(-2)), twice higher than those in conventional alkanolamine solvents. Based on the experimental results and rigorous process modeling, we reveal that reaction swing absorption produces high pressure syngas at a reasonable cost with negligible CO2 emissions. This system provides a fundamental solution for the CO2 crossover and low system stability of electrochemical CO2 reduction. Carbon capture, utilization and storage technology is limited by the need for a separate CO2 capture step. Here, the authors propose a strategy and economic analysis for simultaneous dilute CO2 capture from flue gas and direct electrochemical reduction to synthesis gas via reaction swing absorption. English Nature Publishing Group Toward economical application of carbon capture and utilization technology with near-zero carbon emission Article 10.1038/s41467-022-35239-9 1 Nature Communications, v.13, no.1 Nature Communications 13 1 Y scie scopus 000952021200001 2-s2.0-85143370630 Multidisciplinary Sciences Science & Technology - Other Topics Article ELECTROCHEMICAL REDUCTION ELECTROCATALYTIC REDUCTION CO2 CONVERSION DIOXIDE GAS BICARBONATE