| The study of dielectric barrier discharge(DBD) and photocatalysis process is a new idea in volatile organic compounds(VOCs) controlling. These two methods have many advantages, such as simple technology and low costs etc. The purpose of this paper is to develop the advantages of two processes. We chose the benzene as the target, analysed the mechanism of DBD and photocatalysis process, summarized the factors which can influence the reactions of this process.As a kind of gas discharge, DBD has ability to deal with the benzene itself. This process is also the main research direction of a lot of researchers at present. It can destroy the chemical bonds of benzene. The benzene will be transformed into pieces, then O3 and free radical such as OH,HO2 O can oxidize the pieces, finally the molecules of benzene are turned into CO CO2 and H2O. The result of the test shows, high electrostatic field strength, low velocity in reactor are suitable to remove benzene.In the test of degradation of benzene, we optimised the dielectric stuffing by changing the size and material of stuffing, summarized the function of stuffing performed in the course of reacting, described the relation between intensity of discharge and density of plasma through determining the density of ozone.The article introduces the use of different kinds of photocatalyst, and describes the concept of nanometer semiconductor and the catalysis principle of nanometer TiO2 especially. We enclosed TiO2 on the stuffing surface, then TiO2 formed a layer of membrane. When the photocatalyst was excited by the ultraviolet ray which was produced by gas discharge, it would catalyse and oxidize the pieces of benzene. |
