【摘要】 利用管式流动反应器研究了在常压空气中二氯甲烷的高温氧化特性,实验温度为700~1 000℃,停留时间为1.5~2.5 s.结果表明,当温度低于800℃时,停留时间显著影响二氯甲烷的氧化产物分布;当温度高于800℃时,二氯甲烷的氧化产物分布主要受温度影响.二氯甲烷首先被氧化为CO和HCl,然后CO在HCl的抑制作用下被缓慢氧化.分解二氯甲烷的适宜温度为900~1 000℃.当温度低于900℃时,仅通过延长停留时间不能把CO充分氧化为CO2;温度超过1 000℃会促进HCl的分解,增加Cl2的生成量.更多还原

【Abstract】 The oxidation characteristic of dichloromethane in air at high temperature was studied in an atmospheric tubular flow reactor.The experiment temperature varied from 700 ℃ to 1 000 ℃,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 ℃,whereas the oxidation process is dominated by the temperature above 800 ℃.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 ℃ and 1 000 ℃.It is not sufficient that temperature is below 900 ℃ for complete conversion of CO to CO2,while when the temperature is above 1 000℃,the formation of Cl2 will be enhanced.更多还原