| 摘要 |
PROBLEM TO BE SOLVED: To provide an active carbon catalyst of superior desulfurization efficiency for carrying out the flue gas desulfurization of superior economic efficiency by applying water-repellent treatment to active carbon composed of coal as a main raw material. SOLUTION: This active carbon catalyst is used for oxidizing sulfurous acid gas in flue gas by coexisting oxygen in flue gas and recovering and removing the gas as sulfuric acid, and the catalyst is prepared by applying water repellency treatment to active carbon composed of coal as a main material. In the case of water repellency treatment, it is preferable to select a water-repellent polymer substance not modifying micropores of active carbon for the purpose of developing high activities. As the repellent substance, polyethylene, polypropylene, polystyrene, fluororesin or the like can be used. As for the repellency treatment for the active carbon of coal family, a process of melting the repellent substance in an organic solvent and impregnating the active carbon of coal family with the solvent and deposit the solvent on the active carbon or a process of impregnating active carbon of coal family with a dispersion of repellent substance of average particle diameter of 15-100 nm and deposit the dispersion on the active carbon is utilized. |
