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The removal of low concentrations of toluene using non-thermal plasma (NTP) coupled with Mn-Ce/La/γ-Al2O3 catalysts was investigated in this study. Mn/γ-Al2O3 catalyst, Mn-Ce/γ-Al2O3 catalyst and Mn-La/γ-Al2O3 catalyst were prepared for the experiment. The removal efficiency of toluene, generation of O3, COx selectivity for different reactors were studied. The catalysts were characterized by BET, SEM, H2-TPR and ICP-OES. The results showed that the rare earth catalysts could effectively improve the removal efficiency of toluene and the degree of mineralization. Mn-La/γ-Al2O3 had the better catalytic performance than Mn-Ce/γ-Al2O3. The removal efficiency of toluene for the Mn-La/γ-Al2O3 catalyst was 72.74% under the initial concentration of toluene of 600 mg·m-3, discharge voltage of 22 kV and gas flow rate of 6 L·min-1. Moreover, H2-TPR results indicated that the low-temperature activity and capability of O3 adsorption enhanced with the loading of rare earth catalysts. The catalysts were contributed to the decomposition of O3 and the enhancement of selectivity of CO2 and COx. © All Right Reserved.
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