Abstract
Copper and stainless steel have been investigated as low voltage electrodes in wire-to-plane electrode configuration under conditions of DC positive streamer corona discharge. Copper has been chosen due to its well-known catalytic activity while, on the other hand, stainless steel was selected as an opposite extreme to copper–due to its high passivity. The initial gas contained 400 ppm NO/N2, 10% O2, and water vapors or 40% aqueous solution citric acid. Removal rates of NOx have been calculated as a function of the applied voltage. Results have shown that the highest removal rate, 56% for NO, have been obtained while employing Cu plate and citric acid. We suppose that Cu participates in the process of treatment, while stainless remains inactive. Therefore, while using a stainless steel plate, removal rates have reached lower values than while employing a copper plate.
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