Synergistic effect in one-stage dielectric barrier discharge plasma and Ag/Al2O3 catalytic systems on C2H2-SCR of NOx

Abstract C 2 H 2 -SCR of NO x over one-stage dielectric barrier discharge (DBD) plasma system combined with Ag modified alumina catalyst at excess oxygen was carried out. NO x and C 2 H 2 conversions and CO x selectivity dependence on reaction temperature and discharge voltage were investigated systematically. At low temperatures, a synergistic effect of HC-SCR of NO x in one-stage DBD plasma and 2 wt% Ag/Al 2 O 3 catalyst was clearly observed. The improvement on the NO+O 2 co-adsorption and formation of more active nitrate species adsorbed on 2 wt% Ag/Al 2 O 3 catalyst by plasma was analyzed by MS-TPD and TPSR methods.