Effects of particulate matter on NO<SUB>x</SUB> removal in dielectric barrier discharges

Abstract

It has been widely known that non-thermal plasma could remove nitrogen oxides (NOx). In this study, the effect of particulate matter (PM) on NOx reduction with a dielectric barrier discharge in needle to cylinder reactor was investigated experimentally. Diesel particulate filter was used as a discharge reactor, and PM that was formed by a special PM generator was loaded on it. Test gas was a mixture of NO, N2 and O2, and experiments were performed in room temperature. The results showed that fresh PM promoted NOx removal reactions in the barrier discharge field, but its effect deteriorated with elapsed time of the reaction process.