介质阻挡放电等离子体降解CF_4

Decomposition of Carbon Tetrafluoride by Dielectric Barriers Discharge Plasma

采用介质阻挡放电(DBD)等离子体技术降解强温室气体CF4,考察了外加气体氧气(O2)、空气、氩气(Ar)对DBD降解CF4的影响.结果表明:随着放电时间的延长,CF4降解率升高.3种外加气体条件下,CF4的降解率依次为Ar>空气>O2.外施电压1 000 V,Ar条件下放电4 min,CF4降解率可达98.2%,而O2条件下CF4降解率只有36.9%.水汽对CF4降解有一定抑制作用.红外光谱检测结果表明,降解产物主要为CO2,CO和COF2.

Carbon tetrafluoride （CF4）, a strong greenhouse gas, was destructed with dielectric barriers diseharge （DBD）. The experimental results indicated that the decomposition efficiency of CF4 increased with the increase of discharging time. In addition, we investigated the influence of three kinds of additive gases （Ar, Air, O2 ） on decomposition efficiency of CF4, The results showed that decomposition efficiency can be increased to some extent, following the order： Ar 〉 Air 〉 O2. Decomposition efficiency of CF4 can reach 98.2% after 4 rain discharge at 1 000 V operating voltage. The experiment also showed that water vapor cannot be helpful to the decomposition ettieieney of carbon tetrafluoride. Lastly, we analyzed discharge products by fourier transformation infrared spectrometer （FTIR）, finding them to be mainly Co2, CO, COF2.