Method for simultaneously removing nitrous oxide and nitric oxide in exhaust gas of chemical plant by utilizing catalyst

A technology of nitrous oxide and nitric oxide, which is applied in the fields of nitrous oxide capture, chemical instruments and methods, separation methods, etc., to achieve the effects of simplifying the process, reducing operating costs, and simplifying the waste gas treatment process
CN104841273AInactive Publication Date: 2015-08-19KOREA INST OF ENERGY RES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KOREA INST OF ENERGY RES
Publication Date
2015-08-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for simultaneously removing nitrous oxide and nitric oxide in the exhaust gas of a chemical plant by utilizing a catalyst. According to the method, a zeolite catalyst, infiltrated in iron ions, is put in a catalytic reactor. Inside the catalytic reactor, the ammonia is adopted as a reducing agent, and the operation conditions supplied from the catalytic reactor to the exhaust gas is controlled. In this way, during the generation process of nitric acid, adipic acid, caprolactam and the like, nitrous oxide and nitric oxide can be generated out of the exhaust gas of the chemical plant at the same time at a low reaction temperature of 300-400 DEG C.
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Description

technical field

[0001] The present invention relates to a catalytic reactor comprising a zeolite catalyst impregnated with iron ions to simultaneously offset A process for nitrous oxide and nitric oxide that can replace existing catalytic processes using ammonia reducing agents that require high reaction temperatures above 400°C, and for the removal of monoxide by separate processes Dinitrogen and nitric oxide related processes are integrated to enable simultaneous removal of N under operating conditions of approximately 350°C and under NOx offsetting operating conditions using an ammonia reducing agent 2 O.

[0002] The zeolite catalyst impregnated with iron ions used in the present invention is produced through the following steps: a moisture pretreatment step in which the zeolite is subjected to moisture pretreatment by supplying water vapor for 0.1 to 2 hours in a nitrogen atmosphere; and a step of impregnating iron ions , wherein iron nitrate hydrate (Fe(NO 3 ) 3 9H ...

Claims

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