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AssigneeChiyoda Corporation
InventorsKazushige Kawamura, Yoichi Umehara, Dai Takeda, Osamu Togari, Naonori Sonehara, Hiroaki Nishijima, Sachio Asaoka
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Active carbon catalyst for recovering and removing sulfur oxides contained in flue gas by turning them into sulfuric acid by a catalytic desulfurization reaction. Powdery active carbon and fluororesin are kneaded by shearing force before being molded to a desired profile so that the inter-particulate gaps of powdery active carbon particles are made water-repellent. Flue gas preferably flows downwardly through a tower filled with such an active carbon catalyst, which is made to show a honeycomb structure having surfaces running only in a direction parallel to the flow. The activity of the catalyst maintains an enhanced level if dilute sulfuric acid or water is introduced into the active carbon from the top of the tower to cleanse the surface of the active carbon catalyst so that the catalyst layer is prevented from being clogged and contaminated by ashes and soot contained in flue gas.
An active carbon catalyst comprising powdery active carbon and fluororesin and containing gaps formed between particles of said powdery active carbon, the peripheral wall of said gaps being made water repellant so that discharge of the produced sulfuric acid from the gaps is promoted, the water repellency having been realized by applying shearing force to the powdery active carbon and particles of the fluororesin so that the particles of the fluororesin are deformed.
Dependencies are inferred from the claim text.