| 摘要 |
PURPOSE:To efficiently make a harmful organic substance harmless, under the irradiation of vacuum ultraviolet rays, by bringing the harmful organic substance into contact with a photocatalyst in the gaseous condition under the coexistance of oxygen. CONSTITUTION:A treating device is made up of a reaction tube 1, a light source 2 for generating vacuum ultraviolet rays, a photocatalyst film 3, a harmful organic substance supply pipe 4, and a discharge pipe 5 for discharging harmlessly treated substance; and an annular space A is formed between the light source 2 and the photocatalyst film 3. To treat a harmful organic substance for making it harmless, first, a vacuum ultraviolet ray generating light source 2 is operated for producing vacuum ultraviolet rays, and the photocatalyst film 3 is activated. Next, the air containing the gas of the harmful organic substance is introduced into the reaction tube 1 through the supply pipe 4 so as to be circulated inside the annular space A, and the harmful organic substance is excited and a part thereof is decomposed. Further, the decomposition of the intermediate substance produced by the decomposition is accelerated by the photocatalyst for making it harmless. The oxygen coexisting inside the annular space A is subjected to the irradiation of vacuum ultraviolet rays for producing ozone, and thereby the decomposing reaction is accelerated and maintained. |
