Experimental Research On Destruction Of Sulfur Dioxide By Stuffed Corona Discharge

Applied research on destruction of sulfur dioxide by plasma is discussed in this paper. Based on elementary theory of plasma, the mechanism of destruction was decided: under the action of activated particles (such as high-energy electrons, ozone, radicals, etc) produced by corona discharge reaction, a series of physical and chemical reaction will take place. The result is that sulfur dioxide is changed into sulfur trioxide. The removal pathways are mainly including two steps. Firstly, high-energy electrons undergo an inelastic or elastic collision with gas molecules. Those collisions lead molecules to ionization, dissociation or excitation. Secondly molecules of sulfur dioxide are oxidized into sulfur trioxide by those particles, which are including ozone and oxygen plasma.In mechanism test, we can deduce mechanism of sulfur dioxide destruction by measuring the concentration of the ozone. The result shows that high electrostatic field strength and low velocity are more suitable to produce ozone, hi the higher electrostatic field strength, the ozone concentration produced by the reactor with BaTiOs packed material is higher than that without BaTiC>3 packed material. When electrostatic field strength is 10 kV/cm, the highest concentration of ozone is 3.38mg/L.In the experiment of destruction of sulfur dioxide, we use BaTiOa and SiC as the stuffed materials. The research shows that the removal efficiency of sulfur dioxide increases when electrostatic field strength rises, and decreases when velocity and inlet concentration rises. In the higher electrostatic field strength, the removal efficiency of sulfur dioxide with BaTiOs packed material is higher than that without BaTiO3 packed material. BaTiO3 packed material is better than SiC.