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An experimental investigation has been conducted to reduce CO/sub 2/ 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 passes through the active corona-induced plasma zone. High-speed gas flow near the exit of the electrode cools the electrodes; hence, the chemical reactions and the stability of discharge are enhanced. Various amounts of argon gas were added to the model combustion gas (N/sub 2/:O/sub 2/:CO/sub 2/=0.745:0.15:0.105). The results show that the CO/sub 2/ gas reduction rate increases with increasing corona current when the model gas is seeded with argon. The CO/sub 2/ gas reduction rate increases when the percentage of argon gas in the mixture increases up to 20%, and decreases when the percentage of argon gas in the mixture increases above 20%. >

Experimental investigation has been conducted to study the effect of electrohydrodynamic (EHD) flow on the pressure drop and heat transfer in a corona torch. The results show that strong polarity effects on the EHD flow generated pressure drop in the system. However, the effect of EHD flow decreases with increasing gas flow rate.

An experimental investigation has been conducted to enhance and control corona discharge in two small diameter cylindrical hollow electrodes by an external gas flow. The results show that the time‐averaged corona current for fixed discharge voltages increases with increasing gas flowrate of pure nitrogen, and pressure drop is not significantly influenced by corona discharge currents.

An experimental investigation has been conducted to obtain electrode surface temperature profiles for corona discharges. The results show that a slight temperature increase occurs near the edge of the cylindrical hollow electrodes.