活性炭吸附和脱附-等离子体氧化净化有机废气的研究

根据滑动弧放电等离子体适于降解高浓度有机物废气的特性,结合活性炭吸附法,提出了吸附器的吸附浓缩和热脱附-等离子体氧化净化有机废气的方法。在活性炭吸附过程中,最初2 h内甲苯净化率达到100%,随着时间的增加净化率下降;在热脱附滑动弧放电等离子体净化过程中,甲苯降解效率最高为97.3%。将滑动弧放电等离子体反应器出口气相产物收集进行FT-IR检测,发现放电后有CO2、CO、H2O和NO2产生,并分析了甲苯的降解机理。

Study of VOCs emission control by activated carbon adsorption-plasma oxidation

Volatile organic compounds (VOCs) emission control by combining intermittent activated carbon adsorption and plasma oxidation was investigated. Activated carbon adsorption in fact is to utilize the adsorption character of activated carbon to adsorb organic compounds of exhaust gas at low thickness and large blast volume and condense. Plasma oxidation in fact is to use hot air to heat organic solvent adsorbed and make it boiling and desorbed from active carbon, and this exhaust gas of high thickness is led into the reactor of plasma oxidation. When adsorbed, the toluene removal rate reached 100% at the beginning of 2 h, and decreased with increasing of time. The toluene degradation rate reached the max 97.3% in the plasma oxidation process. The major gas phase products detected by FT-IR from the decomposition of toluene with air participation were CO, CO₂, H₂O and NO₂. A possible reaction mechanism for toluene destruction by glidarc technology is proposed and summarized.