Photo-plasma catalytic degradation of high concentration volatile organic compounds

High concentration (>1000 ppm) volatile organic compounds (VOCs) is a serious threat and increasing tech-nologies of catalytic oxidation have been developed to rapidly remove VOCs. However, single technology is usually restricted by the low removal efficiency and low mineralization rate. For example, photocatalysis (PC) exhibits high mineralization rate of VOCs, but the VOCs removal capacity is restricted (100-500 ppm). Plasma discharge catalysis (PDC) could remove high concentration VOCs, but the VOCs mineralization rate is low. In this work, we attempt to develop a coupled photo-plasma catalytic (PPC) technology to remove high concentration VOCs. We prepare WO3/TiO2 catalyst and select acetaldehyde as a representative of VOCs to evaluate the feasibility of coupled PPC. The PPC achieves degradation of 8025.49 ppm acetaldehyde and mineralization of 65.9 % in 30 min, which is superior to the PPC and PDC. The as-developed PPC technology is promising in the application of degrading high concentration VOCs.