Effect of TiO2-ZnO/GAC on by-product distribution of CVOCs decomposition in a NTP-assisted catalysis system

Abedi, Kamaladdin; Ghorbani-Shahna, Farshid; Bahrami, Abdolrahman; Jaleh, Babak; Yarahmadi, Rasoul

doi:10.1515/pjct-2015-0006

Abstract

In this study, the catalytic effect of TiO₂-ZnO/GAC coupled with non-thermal plasma was investigated on the byproducts distribution of decomposition of chlorinated VOCs in gas streams. The effect of specific input energy, and initial gas composition was examined in a corona discharge reactor energized by a high frequency pulsed power supply. Detected by-products for catalytic NTP at 750 J L-1 included CO, CO₂, Cl₂, trichloroacetaldehyde, as well as trichlorobenzaldehyde with chloroform feeding, while they were dominated by CO, CO₂, and lower abundance of trichlorobenzaldehyde and Cl₂ with chlorobenzene introduction. Some of the by-products such as O₃, NO, NO₂, and COCl₂ disappeared totally over TiO₂-ZnO/GAC. Furthermore, the amount of heavy products such as trichlorobenzaldehyde decreased significantly in favor of small molecules such as CO, CO₂, and Cl₂ with the hybrid process. The selectivity towards COx soared up to 77% over the catalyst at 750 J L-1 and 100 ppm of chlorobenzene.

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Effect of TiO2-ZnO/GAC on by-product distribution of CVOCs decomposition in a NTP-assisted catalysis system

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