ScholarWorks@성균관대학교

초록

Among advanced carbon capture and utilization strategies, the reactive capture and conversion (RCC) strategy offers significant advantages by directly converting CO2 in its captured state, eliminating the need for high-purity CO2 and separation processes. Herein, we developed an electrochemical RCC system that efficiently converts the captured CO2 into high-purity formic acid by integrating CO2 capture, electrochemical conversion, and formic acid purification. Triethylamine (TREA) was selected as the CO2 absorbent because it captures CO2 as bicarbonate. The TREA-captured CO2 was converted to formate with a 60% Faradaic efficiency and a 94% CO2-to-formate yield through an electrochemical RCC system equipped with a Sn-Cu catalyst in a membrane electrode assembly electrolyzer. Purification was completed via a two-step process involving amine exchange for TREA regeneration and distillation. In situ Raman spectroscopy elucidated the key intermediates and demonstrated the roles of the catalyst and CO2 absorbent. Techno-economic analysis and life cycle analysis highlighted this system’s promising profitability and environmental sustainability.

키워드