Abstract
In order to prevent the depletion of the ozone layer due to CFCs, we have experimentally evaluate applying the DC corona discharge reactors to a gas contained CFC12. Mixing gas of Air (0.4l/min) and CFC12 (20000ppm, 0.043g/min) is excited by passing though a corona reactor in a high electric voltage field. Maximum input power of this experiment is about 190W. Exhaust gas from corona reactor was introduced to the treatment vessel in which H_2O and Ca(OH)_2 have fulfilled in order to control of by-products. And temperature of inner surface of reactor increased about 110℃ for 60 minutes. Therefor, reactor was cooled by water. In this experiment, corona discharge condition was observed by the infrared thermograph, and CFC12 decomposition rate was measured using gas chromatograph (GC). We found that 1) CFC12 decomposition rate of 99% obtained at an input power of about 190W. However, decomposition rate decreased from 99 to 30% after 40 minutes, 2) CFC12 decomposition rate of about 10% increased by the reactor cooling. 3) by-products in the exhaust gas weren't detected by the GC and detection tube, while the C1 and F ions were detected 75ppm and 50ppm, respectively.
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