Plasma-catalytic Oxidation of Toluene on Ag Modified FeO_x/SBA-15

Meijuan Lu ； Wenting Yang ； Chenglong Yu ； Qian Liu ； Daiqi Ye

《Aerosol and Air Quality Research》 20卷1期 (2020/01) Pp. 193-202

https://doi.org/10.4209/aaqr.2019.09.0467

摘要

Catalysts created by loading FeO_x and AgO_x on SBA-15 surfaces via wet impregnation were used to remove toluene with the assistance of non-thermal plasma (NTP). The catalysts were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), and H_2 temperature-programmed reduction (H_2-TPR). The results showed that incorporating the SBA-15, 3%FeO_x/SBA-15 and 2%FeO_x-1%AgO_y/SBA-15 catalysts enhanced the toluene removal efficiency and CO_2 selectivity of the NTP system. The silver particles tended to cover the catalyst surface in the form of Ag and Ag_2O, which lengthened the residual time of toluene in the NTP-catalytic system, thereby promoting the reaction of toluene with oxygen on the catalyst surface. Simultaneously, introducing Ag improved the distribution of FeO_x on the catalyst surface, increasing toluene oxidation and catalyst stability. According to our analysis of the toluene removal efficiency, identification of organic byproducts, and in situ FT-IR spectroscopy of the toluene adsorption, FeO_x and AgO_x significantly enhance the efficiency of toluene degradation in plasma-assisted catalytic systems.

關鍵字

FeO_x-AgO_y/SBA-15 catalyst ； Toluene removal ； Plasma-catalytic oxidation