Synergistic effect for simultaneously catalytic ozonation of chlorobenzene and NO over MnCoOx catalysts: Byproducts formation under practical conditions

Abstract This paper synthesized bimetallic MnCoOx catalysts for efficient synergistic ozonation of chlorobenzene (CB) and NO with presence of complicated components in flue gas. MnCoOx-I (MnCo-I) with 3D sphere-like morphology and crystalline structure of MnCo2O4.5 attained CB conversion of 90% with the O3/CB of 10.0 at 120 °C. High porosity, CO2 desorption ability and abundant acidity contributed to its excellent performance. Catalytic co-ozonation of CB/NO over MnCo-I demonstrated that NO presence possessed negligible effects for CB conversion. But promoted mineralization rate increase, which originate from the high valence intermediates of NO ozonation. Besides, SO2 and 1,2-dichloroethane (DCE) introduction promoted CB ozonation and CB/NO co-ozonation, while H2O, and benzene (PhH) presence demonstrated opposite but not obvious tendency. The chlorinated methane species were dramatically increased with DCE presence, while the chlorinated benzene was promoted by NO addition. These observations provided a significant brand-new insight for VOC catalytic ozonation under practical conditions.