2001•The Proceedings of the Thermal Engineering ConferenceOpen access

F111 Decomposition of hazardous and refractory chemicals by supercritical water

Akira Suzuki, T. Iwamori, Noriyuki Anjoh, Shin-ichiro Kawasaki

Abstract

Supercritical Water Oxidation (SCWO) employs water which exceeds supercritical conditions (374℃ at 22MPa). This method utilizes the strong reactive solvent characteristics of supercritical water and can completely decompose organic materials in supercritical water. As a hazardous and refractory chemicals, decomposition of PCBs by SCWO was demonstrated using the continuous reactor with pressure balancing. This reactor has been successfully operated to decompose both PCBs and dioxins completely under the conditions of 630℃ and 23.5MPa.

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Key concepts: Supercritical water oxidation, Supercritical fluid, Hazardous waste, Decomposition, Waste management, Refractory (planetary science), Materials science, Chemical engineering