Abstract
Effect of some kinds of alcohol addition to alkali solvent on hydrothermal decompositions of various kind of halogenated carbons such as chlorofluorocarbons (CFCs) with 1-4 carbons was investigated. We have already reported the perfect decomposition of the CFCs under methanolic alkaline hydrothermal treatment at lower temperature compared to supercritical water oxidation (SCWO) process. Here, in order to clarify the effect of a lcohol addition to solvent, the relation of concentration of halogenide ion and organic ions were investigated. Furthermore the organic carbons were analyzed by 13C-NMR to confirm the origin of the carbon whether from the oxidation of added alcohol or from the transformation of starting CFCs. It was revealed that the carbon-halogen bondings can be completely dehalogenated and the halogenide ions were released into the aqueous solution and can neutralize with alkali therefore, the perfect process for the elimination of the toxicity should be possible in the hydrothermal treatment.
