Advancing integrated CO 2 electrochemical conversion with amine-based CO 2 capture: a review.

Carbon dioxide (CO 2 ) electrolysis is a promising route to utilise captured CO 2 as a building block to produce valuable feedstocks and fuels such as carbon monoxide and ethylene. Very recently, CO 2 electrolysis has been proposed as an alternative process to replace the amine recovery unit of the commercially available amine-based CO 2 capture process. This process would replace the most energy-intensive unit operation in amine scrubbing while providing a route for CO 2 conversion. The key enabler for such process integration is to develop an efficient integrated electrolyser that can convert CO 2 and recover the amine simultaneously. Herein, this review provides an overview of the fundamentals and recent progress in advancing integrated CO 2 conversion in amine-based capture media. This review first discusses the mechanisms for both CO 2 absorption in the capture medium and electrochemical conversion of the absorbed CO 2 . We then summarise recent advances in improving the efficiency of integrated electrolysis via innovating electrodes, tailoring the local reaction environment, optimising operation conditions ( e.g. , temperatures and pressures), and modifying cell configurations. This review is concluded with future research directions for understanding and developing integrated CO 2 electrolysers.