Low temperature chlorobenzene catalytic oxidation over MnOx/CNTs with the assistance of ozone

Abstract

Manganese oxide supported on carbon nanotubes (MnO_x/CNTs) were prepared by an impregnation method and their catalytic oxidation performances of chlorobenzene (CB) with the assistance of ozone were investigated. The experimental results indicated a synergistic effect between the MnO_x/CNTs catalyst and ozone promotion for CB destruction, which promoted CB oxidation at temperatures between 80 °C and 280 °C. Especially at temperatures below 120 °C, both CB conversion and CO₂ selectivity above 95% were achieved with an apparent activation energy of 15.0 kJ mol⁻¹. Moreover, MnO_x/CNTs showed good stability and resistance to chlorine poisoning, which was demonstrated by stable catalytic activity for a long-term CB catalytic oxidation with 2300 ppm ozone up to 240 h.