CO2 capture and activation with a plasma-sorbent system

• DOI: 10.1016/j.cej.2021.132979
• Publication Date: 2021-10-15T05:33:08Z
• Authors: Sirui Li; Fausto Gallucci
• Keywords: Plasma system; 13. Climate action; CO2 conversion; CO2 capture; Dynamic operations; 01 natural sciences; 7. Clean energy; Sorbents; 0104 chemical sciences

Non-thermal plasma-induced one-step desorption of splitting of CO2 has been investigated in this research for carbon capture and utilization. An experimental study was conducted in a plasma-sorbent system that consists of a coaxial DBD reactor packed with hydrotalcite pellets. Operation parameters including discharge power and carrier gas flow rate were varied to explore their effect on the desorption of CO2 from the sorbent and conversion to CO. Results showed that the discharge power plays the dominant role in the desorption process. Faster desorption was achieved with increasing power but at a cost of CO2 conversion. Although the carrier gas flow rate does not have a significant effect on the desorption, higher conversion was achieved with a higher flow rate due to the dilution effect. The maximum single pass conversion of CO2 achieved was 67.44%. Based on the feature of this technology, periodic operation of multiple reactors including reactors in parallel and in series are discussed for continuous CO2 capture and its full conversion.