Treatment of waste H₂S by atmospheric pressure microwave plasma jet

The treatment of H₂S gas by the atmospheric pressure microwave plasma jet (MPJ) technology was studied. The influences of the temperature, the microwave power, the carrier(Ar) flow and total gas flow rate on H₂S decomposition were investigated. The results show that, the temperature must be controlled in a certain range in order to process hydrogen sulfide; as the microwave power and the carrier gas flow increases, the decomposition rate of H₂S is first increases, then decreases; with the increase of the total gas flow rate, the decomposition rate of H₂S falls. The maximum decomposition rate of H₂S reach to 91.32%, when the mass ratio of H₂S to Ar is 10∶90, the total flow is 1000 mL/min, and the microwave is 1000 W. The production of the treatment was characterized by Raman spectroscopy and XRD (X-ray diffraction ), and the results show the solid state material is high purity sulfur. (authors)