The byproduct generation analysis of the NOx conversion process in dielectric barrier discharge plasma

Abatement of NOx through non-thermal plasma (NTP) processes has been developed over the past several years. Since discharge plasma contains a large amount of highly active species during the reaction process, NOx is removed during our desired conversion reaction, as well as production of other byproducts, such as O-3 and N2O. The effect of reaction conditions, such as oxygen content, discharge power, operation time, initial NO concentration and gas residence time, on generation characteristics of O-3 and N2O was investigated. Results showed that, with increasing oxygen concentration and discharge power, the production of N2O and O-3 increases. Additionally, O-3 concentration decreases with increasing operation time; the higher input power, the higher the temperature increases, causing a greater reduction rate of O-3, which also leads to a reduction of NO2 production. NO concentration and gas residence time also exert effects on the generation of byproducts.