Study of SO2 removal using non-thermal plasma induced by dielectric barrier discharge (DBD)

Dielectric Barrier Discharge (DBD) non-thermal plasma reactors built with three different dielectric materials for SO2 removal were studied. The discharge characteristics of the three dielectrics, namely, glass, Teflon, and glass fiber-based epoxy-resin, were analyzed using Lissajous figures. From the Lissajous figures, the transition charge and energy, deposition for each dielectric material were determined. When both the discharge characteristics and mechanical processability, were considered, glass fiber-based epoxy, resin it-as regarded as the best dielectric barrier among the three for DBD plasma reactors, A multi-cell DBD reactor built with glass fiber-based epoxy, resin was used for treating air stream containing SO2. SO2 % removal decreased with increasing initial SO2 concentration in a biphasic fashion. SO2 removal was greatly, improved by adding NH3 into the air stream. Raising the relative humidity, of the air stream also helped SO2 removal, A SEM (scanning electron microscope) test illustrated some changes in surface morphology, of Teflon and glass fiber-based epoxy resin.