Removal of NO and formation of byproducts in a positive-pulsed corona discharge reactor

The effect of feed gas composition on the removal of NO and the formation o f byproducts in a positive-pulsed corona discharge reactor were experimenta lly examined. The mechanism for the removal of NO was found to largely depe nd on the gas composition. In the absence of oxygen, most of the NO removed was reduced to N-2; on the other hand, the oxidation of NO to NO2 was domi nant when oxygen was present although the content was low. The removal of N O decreased with the water vapor content due to the decreases in the power delivery and the formation of ozone, The production of N2O increased with t he pulse repetition rate, and the presence of NH3 and SO2 enhanced it. Bypr oducts generated from propane used as additive were identified and analyzed . The main byproducts other than carbon oxides were found to be ethane and formaldehyde, but their concentrations were negligibly small.