| 초록 |
Use of supercritical water (374℃ and 221 bar) oxidation (SCWO) for wastewater treatment has been increasing since the mid 1970’s. SCWO systems are known as a very efficient way to treat refractory/hazardous compounds such as PCB and Dioxins. However, major obstacles to the successful application of halogenated chlorinated organic compounds in the SCWO process are the significant corrosion due to acidic byproduct and fouling problem by low solubility of inorganic salts when alkaline solution is added to neutralize the acid. Therefore, it is critical to overcome both corrosion and fouling for the SCWO system to have practical use in treating halogenated wastes. In this study, corrosion phenomena of various metal alloys were investigated when 2,-chlorophenol was oxidized in continuous type anti-corrosive SCWO reactor. Corrosion tests were conducted at both sub critical region and supercritical region. comparing with decomposition efficiency of 2-chlorophenol without metal coupons, corrosion of metal coupons contributes to the elevation of decomposition efficiency of 2-chlorophenol, even though the degree of contribution is different from each alloys. |
