No study was found in the literature on the catalytic effect of TiO2/GAC (Granular activated carbon), ZnO/GAC, and TiO2eZnO/GAC combined with non-thermal plasma (NTP) for the decomposition of chlorinated volatile organic compounds (CVOCs) in gas streams. In the present study, this catalytic NTP process was investigated to examine the effect of specific input energy (SIE), initial concentration, as well as residence time on the removal efficiency (RE) of CVOCs in a corona discharge reactor energized by a high frequency pulsed power supply. A dip-coating solegel impregnation technique was used to coat TiO2, ZnO, and mixture of TiO2eZnO nanoparticles on GAC, which were then combined with NTP in a two-stage configuration. The results revealed that the efficacy of the catalysts was in the order TiO2eZnO/ GAC y TiO2/GAC > ZnO/GAC with chloroform feeding, while when chlorobenzene introduced, the order changed to TiO2eZnO/GAC > ZnO/GAC > TiO2/GAC. A significant enhancement was observed with RE as catalysts coupled with NTP in all cases and a RE of 100% was achieved in the presence of both TiO2/GAC and TiO2eZnO/GAC at SIE of ca. 400 J L1. Considerable improvement was also noticed for coupling TiO2 and ZnO in both efficiency and catalyst life time
