直流コロナ放電によるフロン12の分解特性

抄録

Paying attention to the depletion of the ozone layer due to CFC's, the authors investigated the CFC12 decomposition by electrical method. CFC12 was excited by passing through a corona discharge tube and decomposed to elementary substances in a high electric voltage field. Decomposed gas was introduced into the treatment vessel in which H2O and Ca (OH) ₂ were filled in order to control by-products. In this paper, the preliminary experimental data were analyzed, and the CFC12 decomposition rate was obtained by using the gas chromatograph (GC). We found that i) 99% CFC12 decomposition rate was obtained at an input power of about 190W. However, decomposition rate decreased to 30% after 40 minutes from the start of corona discharge, ii) CFC12 decomposition rate increased about 10% by cooling reactor, iii) almost no byproducts were detected in the exhaust gas, while Cl2 and F ions were detected 75ppm and 25-50ppm respectively in the treatment vessel, and iv) CFC12 decomposition quantity by corona discharge process was larger than that of DC arc plasma process.