The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 1989
Filed:
Feb. 16, 1988
Tomohiko Miyamoto, Takahagi, JP;
Shuntaro Koyama, Katsuta, JP;
Jinichi Tomuro, Katsuta, JP;
Atsushi Morihara, Katsuta, JP;
Hisao Yamashita, Hitachi, JP;
Sadao Takahashi, Hitachi, JP;
Eiji Kida, Hiroshima, JP;
Akio Ueda, Kure, JP;
Shigehito Takamoto, Hiroshima, JP;
Hitachi, Ltd., Tokyo, JP;
Babcock-Hitachi Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides a desulfurizing agent comprising a porous oxide carrier, at least one of molybdenum oxide and tungsten oxide as a first component, supported on the carrier, and at least one of manganese oxide, cobalt oxide and nickel oxide as a second component, supported mainly on the surface of the first component. In a coal gasification system using the present desulfurizing agent and a power generation system using the purified gas therefrom, a reduction column for converting a portion of sulfur dioxide in the regenerated gas to hydrogen sulfide as a pretreatment means to a Claus reaction column can be eliminated when the desulfurizing agent is regenerated. Furthermore, in the present invention a desulfurizing agent capable of reacting with hydrogen sulfide to form a solid sulfur compound at a high temperature is supplied to a gasification furnace and the resulting sulfur compound is withdrawn from the gasification furnace as molten slag together with ashes of fine coal powder, where desulfurization can be attained without a Claus reaction column and without a reduction column. Such desulfurization is likewise applicable to a coal gasification system and a power generation system based on the coal gasification.