Research on the removal of H2S using dielectric barrier discharge combined with photocatalysis and the fate of sulfur in the reaction

Abstract

In this study, a typical odor gas H2S was treated by using dielectric barrier discharge combined with photocatalysis(PDBD) at normal temperatures and pressures. The treatment effect of this method was deeply investigated in in terms of specific input energy, gas flow rate, H2S initial concentration, and O3 concentration. The results showed that the H2S degradation rate was proportional to energy density, which inversely proportional to the initial concentration and gas flow rate. Moreover, the degradation effect of PDBD was better than that of DBD alone. When controlling the initial concentration, the SIE, and the gas flow rate at 60 mg/m3, 1289.25 J/L, 80 L/h respectively, the removal efficiency of H2S could achieve 94.99%. PDBD effectively removed H2S while greatly enhancing the elimination of by-product O3. After the research, yellow-brown elemental sulfur was detected on the surface of the catalyst through the detection and analysis of the photocatalyst.