| 摘要 |
<p>PROBLEM TO BE SOLVED: To make dioxins harmless by an industrially advantageous method wherein inorg. powder contg. dioxins is dispersed into supercritical water held at least at the critical temp. and at least under the critical pressure and dioxins are decomposed under this condition. SOLUTION: Inorg. powder contg. dioxins, water and open air are filled in a reactor and it is heated at 653-873K being at least critical temp. of water, pref. 653-773K. In this case, the reaction pressure is controlled by wt. of water filled in the reactor and 22-40MPa, pref. 25-35MPa is pref. After a specified reaction time passes, in the case where an oxidizing agent is not incorporated, at least 96.5% dioxins in the reactor are decomposed and in the case where such an oxidizing agent as hydrogen peroxide and oxygen gas is incorporated, at least 98.5% dioxins are decomposed. Thereby, dioxins can be made harmless by an industrially advantageous method without necessitating high reaction temp. and complicated reaction control.</p> |
