IN SITU CATALYST FOR SUPERCRITICAL WATER OXIDATION AND SUPERCRITICAL WATER OXIDATION METHOD AND DEVICE USING THE CATALYST

摘要

PPROBLEM TO BE SOLVED: To provide a method and a device capable of suppressing or controlling the undesired deposition of a salt caused during supercritical water oxidation and efficiently performing a supercritical water oxidation reaction, and to produce an in situ catalyst for the supercritical water oxidation used in the method and the device. PSOLUTION: The method for subjecting liquid to be treated containing organic materials to the supercritical water oxidation comprises a process of introducing a catalyst precursor into a reactor, a process of letting the liquid to be treated to the supercritical water state and introducing the liquid to be treated into the reactor so as to allow an alkali metal or an alkali earth metal to exist in the liquid to be treated, an oxidation decomposition process of oxidizing and decomposing the liquid to be treated under the presence of an oxidant and the alkali metal or the alkali earth metal in the supercritical state, and a catalyst formation process of forming the in situ catalyst which is hydrothermally synthesized under the presence of the oxidant and the alkali metal or the alkali earth metal in the supercritical state and comprises a metal acid salt. Therein, the catalyst formation process and the oxidation decomposition process are cooperatively performed, and the oxidation decomposition process is facilitated by the in situ catalyst. PCOPYRIGHT: (C)2005,JPO&NCIPI