High temperature oxidation of dichloromethane in air

The oxidation characteristic of dichloromethane in air at high temperature was studied in an atmospheric tubular flow reactor. The experiment temperature varied from 700°C to 1000°C, while the residence time from 1.5 s to 2.5 s. The results showed that the residence time greatly influences the oxidation products of dichloromethane below 800°C, whereas the oxidation process is dominated by the temperature above 800°C. Dichloromethane is oxidized to CO and HCl firstly, followed by the slow oxidation of CO with the suppression effect of HCl. The favorable temperature for dichloromethane destruction is between 900°C and 1000°C. It is not sufficient that temperature is below 900°C for complete conversion of CO to CO2, while when the temperature is above 1000°C, the formation of Cl2 will be enhanced.