Reduction of CO2 from Combustion Gases by DC Corona Torches

Abstract

Experimental investigation has been conducted to reduce CO, from combustion gases by using dc corona torches. This plasma device, the corona torch, consists of two small diameter hollow electrodes. The gas flow enters the upstream cylindrical hollow electrode and exits at a downstream cylindrical hollow electrode. Therefore, all the reactive gas will be passing through the active corona-induced plasma zone. High-speed gas flow near the exit of the electrode will be cooling electrodes; hence, the chemical reactions and the stability of discharge will be enhanced. The model combustion gas (N2:O2:CO2 0.745:0.15:0.105) was used, together with argon gas as a mixture. The results show that the CO2 gas reduction rate increases with increasing corona current when the model gas is seeded with argon. The CO2 gas reduction rate increases with increasing argon gas percentage mixture (up to 20%), and decreases with increasing argon gas mixture above 20%. © 1990 IEEE