Carbon capture and utilization (CCU) technology is crucial for mitigating climate change, but its high energy consumption and cost hinder widespread adoption. This paper introduces reaction swing absorption (RSA), a novel CCU method that produces synthesis gas (syngas) with near-zero CO2 emissions. RSA uses triethylamine (TREA), a new amine solution, for direct electrochemical CO2 reduction, eliminating energy-intensive thermal regeneration. Experimental results show high CO2 absorption rates (>84%) and improved CO Faradaic efficiency (approximately 30% at -200 mA cm2) compared to conventional alkanolamines. Process modeling reveals that RSA produces high-pressure syngas economically with negligible CO2 emissions, offering a solution to the challenges of electrochemical CO2 reduction.

Kezia Megagita Gerby Langie, Kyungjae Tak, Changsoo Kim, Hee Won Lee, Kwangho Park, Dongjin Kim, Wonsang Jung, Chan Woo Lee, Hyung-Suk Oh, Dong Ki Lee, Jai Hyun Koh, Byoung Koun Min, Da Hye Won, Ung Lee