Experimental Studies Of Gas Discharge And Photocatalystis Process On Benzene Decomposition

This paper is an advantage to adopt synergistic effect of gas discharge and photocatalystis process on benzene decomposition, whose purpose is to combine two kinds of methods together, and to attain the higher decomposition efficiency. TiO₂ films are prepared by Sol-Gel mathod in the experiment, then the optimization of the photocatalysts loders would be discussed. Through improving experiment equipment, the decomposition efficiency of wire-tube reactor is further increased on benzene decomposition. At the same time, the effect of filler, electrostatic field costruction, electrostatic field strength, the initial concentration of benzene and the velocity in empty tube and so on were thought better of. The experimental results indicate that high electrostatic field strength, low velocity in empty tube , low initial concentration of benzene and 26 percent of relative humidity, these factors are suitable to remove benzene.In mechanismic test, synergistic effect of ozone and hydroxyl is discussed. The result shows that fillers are advantage to ozene output, but water vapor and photocatalyst are disadvantage factors. Photocatalyst is helpful on benzene decomposition. When it is treated by cleaning air and forcing electricity on photocatalyzer, photocatalyzer's activity would rebirth easily.The analysis and measure of gas productions after reaction, there are uniform both removal and decomposition efficiency. When electrostatic field strength is 10kV/cm, only 4.8% intermediate has been found in final gas productions after reaction and 95.8% higher in final gas productions is CO,CO2 and H2O. O3 is not directly act on the molecule of benzene, but OH, O-2 and so on. It is obviously that photocatalyst plays more important role than air discharge does on removal benzene.