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

Abstract

Abstract Summary: Toluene decomposition is examined using a corona discharge, a UV lamp, and a TiO 2 catalyst complex system. The toluene decomposition reaction occurs only with OH and O ( 1 D) radicals. High decomposition ratios are obtained: 98% for the toluene/H 2 O/O 2 ‐corona/UV system and 70% for the toluene/H 2 O/air‐corona/UV system. Moreover, if the TiO 2 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 O 2 as a function of toluene concentration. image Relationship of the decomposition ratio with the UV irradiation in air and O 2 as a function of toluene concentration.