Destruction of H₂S gas with a Combined Plasma Photolysis (CPP) reactor

A combined plasma photolysis (CPP) reactor that utilized the dielectric barrier discharge (DBD) plasma together with DBD-driven KrI* excimer ultraviolet emission was applied to the decomposition of H₂S gas. The effects of applied voltage, input current, gas flow velocity, original concentration as well as the ratio of Kr/I₂ mixture on H₂S removal efficiency were investigated. Gas streams containing H₂S were separately treated with single DBD and CPP reactor under the same conditions. In comparison to DBD, CPP could greatly enhance the H₂S removal efficiency at the same applied voltage, inlet gas concentration and gas flow velocity. In addition, the reaction mechanism was also discussed in this paper.