Photodegradation of HCFC-22 Using Microwave Discharge Electrodeless Mercury Lamp with TiO₂Photocatalyst Balls

Abstract

The photodegradation of chlorodifluoromethane (HCFC-22) was investigated using microwave/UV/TiO2photocatalysts hybrid system. The microwave discharge electrodeless mercury lamp (MDEML) used in this study showed mainly atomic Hg emission lines at 253.7 nm. The decomposition efficiency of HCFC-22 increased with decreasing inlet concentration and with increasing reactor residence time. The removal efficiency increased with increasing microwave power on every oxygen concentration. The highest degradation efficiency was obtained when both TiO2balls and MDEML were used.

Simulation of microwave electrodeless ultraviolet device and catalytic oxidation of toluene

“…6,7,8 Foreign scholars first used microwave electrodeless ultraviolet lamp to treat wastewater, and then used it in odor and organic waste gas treatment. 9,10 Seo et al 11 studied the degradation of chlorodifluoromethane by using the microwave electrodeless ultraviolet light with the main radiation wavelength of 253.7 nm. The photocatalytic process had the best degradation effect, but microwave alone could not degrade the pollutants.…”