| 초록 |
To decompose halogenated hydrocarbon without corrosion and fouling problems, an anticorrosive supercritical water oxidation system using nonporous ceramic tube was developed. The novel idea of this research is based on preventing the system from corrosion by halogenated hydrocarbon oxidation and fouling by salt formation of neutralizing agent in supercritical water conditions. At variable operating conditions (340∼440℃ , 250∼300 bar) and loadings (300∼3,000 mg 2,4-Dichlorophenol/L), the system was operated continuously for more than five months to destruct 2,4-dichlorophenol (2,4-DCP) as test compound with hydrogen peroxide (H2O2) as oxidant. No corrosion and fouling problems were observed during the test period in a floating type SCWO system. Prior to design of SCWO reactor, understanding of decomposition kinetics is important, thus, oxidation rate of 2,4-DCP, a model pollutant, was investigated by supercritical water (SCW) at 380∼420℃ and 230∼280 bar with 50∼200 % hydrogen peroxide as the oxidant in a batch reactor. |
