Low-energy electrochemical CO2-amine desorption driven by the proton-coupled electron transfer reaction (PCET)

The CO 2 desorption in amine-based carbon capture processing is accompanied by significant energy consumption, accounting nearly 70% of energy requirements of the entire process. Electrochemical CO 2 capture and release are promising technologies to reduce the energy consumption. The characteristics and CO 2 desorption performance of QH 2 (Tiron) in tertiary amine systems are investigated in this research. The reducing ability of Q (Oxidized QH 2 ) was improved by modifying the electrode to achieve low-energy electrochemical desorption. The CO 2 electrochemical desorption achieved low-energy CO 2 desorption of 0.7 GJ ton −1 CO 2 against over 2.4 GJ ton −1 in a conventional and mature MEA-based system.