Catalyst for removing nitrogen oxides, method for production thereof and method for removing nitrogen oxides

A technology of nitrogen oxides and catalysts, which is applied in the field of catalysts and can solve problems such as catalyst degradation and high catalyst manufacturing costs
CN1642636AInactive Publication Date: 2005-07-20MITSUBISHI HITACHIPOWER SYST LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MITSUBISHI HITACHIPOWER SYST LTD
Publication Date
2005-07-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

Disclosed is a method for producing a catalyst for removing nitrogen oxides which comprises dispersing a hydrated titanium (Ti) oxide or dried material thereof, tungstic acid or a salt thereof, and cerium (Ce) dioxide in a dispersion medium to form a sol-like material, mixing the sol-like material with an aqueous medium to form a catalyst slurry or paste, supporting the catalyst slurry or paste on a catalyst carrier, and then calcinating the carrier; in which catalyst the Ce dioxide is prevented from being embedded in the Ti oxide to realize such a high degree of dispersion of the Ce dioxide on the surface of the Ti oxide as comparable with the case wherein cerium ions are dispersed in micro voids of a zeolite by ion exchange; and the catalyst is free from the occurrence of such phenomena as sintering of the Ti oxide, and deterioration of zeolite with steam when a zeolite is used as carrier.
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Description

technical field

[0001] The invention relates to a method for removing nitrogen oxides (NOx) contained in exhaust gas X ) catalyst, preparation method of said catalyst and removal of NO X Methods. More specifically, the present invention relates to a method for removing NO contained in exhaust gas at a temperature above 450°C X Catalyst, preparation method of said catalyst and removal of NO contained in exhaust gas X Methods. Background technique

[0002] In countries such as the United States, which consumes a large amount of electric power, power generation using so-called simple-cycle gas turbines, which are installed and operated separately, has been increasing to supplement power and cope with peak periods of power consumption. Since the equipment used for power generation is installed on the outskirts of towns, a high proportion of NO contained in the exhaust gas must be X decomposed to purify the gas. On the other hand, in power generation using simple cycle gas ...

Claims

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