Toluene removal over TiO2-BaTiO3 catalysts in an atmospheric dielectric barrier discharge

作者：Wang, Baowei^*; Yao, Shumei; Peng, Yeping; Xu, Yan

来源：Journal of Environmental Chemical Engineering, 2018, 6(4): 3819-3826.

DOI：10.1016/j.jece.2018.06.006

• Toluene removal
• Plasma
• Catalyst
• TiO2
• BaTiO3
• Synergistic effects

Non-thermal plasma (NTP) combined with catalysts has been regarded as a promising approach for the removal of VOCs. In the present work, a series of TiO2-BaTiO3 catalysts were prepared by simple mechanical mixing. The performance of the catalysts on degradation of high concentration of toluene was investigated in a dielectric barrier discharge (DBD) plasma system. The effects of input power, mass ratio of Ti/Ba, gas flow rate and the initial concentration of toluene on the removal of toluene and the selectivity of CO2 as well as the energy yield have been investigated. The toluene removal efficiency and CO2 selectivity increased obviously in the plasma-catalytic system compared with the single NTP system. The removal efficiency of toluene with different catalysts abided by the following rules: Ti1Ba1 > Ti2Ba1 > Ti1Ba2 > BaTiO3 > TiO2 . The reason for the best performance of Ti1Ba1 is that TiO2 offered the providential number of electron-hole pairs while BaTiO3 supplied the fitting number of high energy electrons. Additionally, the synergistic effects between TiO2 and BaTiO3 also reached its maximum in this case. The concentration of O-3 in the exhaust gas was also detected and it reached the lowest point when Ti1Ba1 catalyst was packed in the discharge chamber.

• 出版日期2018-8
• 单位天津大学