Highly Efficient VOC Decomposition Using a Complex System (OH Radical, Ozone‐UV, and TiO2)

Abstract

AbstractSummary: Toluene decomposition is examined using a corona discharge, a UV lamp, and a TiO2 catalyst complex system. The toluene decomposition reaction occurs only with OH and O (1D) radicals. High decomposition ratios are obtained: 98% for the toluene/H2O/O2‐corona/UV system and 70% for the toluene/H2O/air‐corona/UV system. Moreover, if the TiO2 catalyst is combined with the corona‐UV system for 1 000 ppm of toluene, this value increases to 78% (0.31 Wh · m−3 · ppm−1), which is higher than that obtained in a normal corona discharge system.Relationship of the decomposition ratio with the UV irradiation in air and O2 as a function of toluene concentration.imageRelationship of the decomposition ratio with the UV irradiation in air and O2 as a function of toluene concentration.