CO2 capture and activation with a plasma-sorbent system

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.

Automated summary

This research investigated the one-step desorption of splitting CO2 induced by non-thermal plasma for carbon capture and utilization. Results showed that discharge power plays a dominant role in the desorption process, with faster desorption achieved at the cost of CO2 conversion. Higher conversion was achieved with a higher carrier gas flow rate due to dilution effect. The maximum single pass conversion of CO2 achieved was 67.44%, and the possibility of periodic operation of multiple reactors for continuous CO2 capture and full conversion was discussed.