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HWAHAK KONGHAK,
Vol.41, No.3, 368-376, 2003
Vol.41, No.3, 368-376, 2003
유전체 충전형 플라즈마 반응기를 이용한 Trichloroethylene의 분해반응
Decomposition of Trichloroethylene Using a Ferroelectric Packed-Bed Plasma Reactor
유전체 충전형 플라즈마 반응기를 이용하여 공기중 trichloroethylene (TCE)의 분해반응에 대한 연구를 수행하였다. 방전전력, 체류시간 및 반응물 유입농도 등과 같은 여러 가지 운전변수에 따른 TCE의 분해효율을 조사하고, 반응 부산물의 분석을 통하여 TCE 분해 반응 메커니즘을 제시하였다. 실험결과 방전전력 및 체류시간이 증가함에 따라 TCE 분해효율은 증가하였으나 유입농도의 변화에 대한 영향은 거의 없었다. BaTiO3를 충전한 반응기가 알루미나를 충전한 반응기보다 분해효율이 높았으나 TCE의 완전 산화분해의 척도가 되는 COx(CO+CO2)의 수율 및 CO2의 선택도는 BaTiO3를 충전한 반응기보다 알루미나를 충전한 반응기가 월등하게 높았다. 반응생성물 분석결과 주반응 생성물은 COx, CHCl2COCl, C2H2Cl2O2 및 COCl2로 공기중 TCE의 분해 메커니즘은 주로 ClO와 OH 라디칼에 의한 반응으로 판단된다.
The decomposition of trichloroethylene (TCE) in air using a ferroelectric packed-bed reactor was studied. The effects of discharge power, residence time, inlet concentration and other operating conditions on the decomposition efficiency were investigated and the analysis of reaction products was conducted to suggest the mechanism of TCE decomposition. Experimental results showed that the decomposition efficiency of TCE increased with increasing discharge power and residence time but was unaffected by inlet concentration. The decomposition efficiency for BaTiO3 packed reactor was higher than that for alumina packed reactor, but the yield of COx(CO+CO2) and selectivity of CO2 as the measure of the complete oxidation of TCE were higher in alumina packed reactor. The main products of TCE decomposition were COx, CHCl2COCl, C2H2Cl2O2 and COCl2. On the basis of the results, it is inferred that the decompositon of TCE in air proceeds by OH and ClO radical reaction mechanism.
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