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

The CO₂ desorption in amine-based carbon capture processing is accompanied by significant energy consumption, accounting nearly 70% of energy requirements of the entire process. Electrochemical CO₂ capture and release are promising technologies to reduce the energy consumption. The characteristics and CO₂ desorption performance of QH₂ (Tiron) in tertiary amine systems are investigated in this research. The reducing ability of Q (Oxidized QH₂) was improved by modifying the electrode to achieve low-energy electrochemical desorption. The CO₂ electrochemical desorption achieved low-energy CO₂ desorption of 0.7 GJ ton⁻¹ CO₂ against over 2.4 GJ ton⁻¹ in a conventional and mature MEA-based system.