Toward economical application of carbon capture and utilization technology with near-zero carbon emission

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