Advanced oxidation processes for elimination of xylene from waste gases

The elimination of xylene was experimentally studied using advanced oxidation process in a two-step pilot plant photochemical unit with the use UV irradiation combined ozone (first step) and hydrogen peroxide solution (second step). influence initial concentration air flow rate investigated. A mathematical model first step applying UV/O3 treatment developed. Xylene conversion decreased increasing its (lowering residence time unit). highest (95 %) achieved 50 ppmv 57 m3· h?1. Based on results for photolytic unit, main pathway is reaction hydroxyl radicals which are formed both by water/humidity but also singlet oxygen (formed decomposition ozone) water/humidity. Calculated figures-of-merit showed that more energy-cost-efficient higher rates waste gas. technology processes seems promising organic compounds from air, although further studies necessary.