Abstract
Performance and pathways of toluene degradation by three types of processes based on nonthermal plasma, including nonthermal plasma alone (NTP), plasma catalytic (PC), and adsorption-plasma catalytic processes (APC), were compared, which took into account toluene removal efficiency (ηr), mineralization efficiency (ηM), CO2 selectivity (ηC), and energy efficiency (ηE). Co/13X is a catalyst prepared by the impregnation method. NTP combined with the catalyst exhibited good oxidation performance. Also, ηM and ηC were further improved, and ηE was greatly reduced by the APC process. The deactivation of the catalyst was the main drawback for the PC and APC processes, and it was detected by CO2-TPD, FTIR, BET, and element analysis. The APC process was more suitable for low-concentrations VOC. The ηr, ηM, and ηC were enhanced with discharge power and residence time increased. Byproducts of toluene degradation were different between NTP and that combined with catalyst. Toluene degradation in NTP was mainly caused b...
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