Co-Mn catalyst for catalytic oxidation of NH3, preparation method and applications thereof

A catalytic oxidation and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low nitrogen selectivity, poor selectivity, and poor improvement effect. Obvious and other problems, to achieve the effect of high N2 selectivity, low cost, and excellent N2 selectivity
CN110433822AActive Publication Date: 2019-11-12DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2019-11-12

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Abstract

The invention discloses a Co-Mn catalyst for catalytic oxidation of NH3, a preparation method and applications thereof, and belongs to the technical field of environmentally friendly catalytic treatment. According to the preparation method, the main body of the preparation method is an improved co-precipitation method; a Co-Mn spinel structure catalyst is obtained by using ammonia water as a precipitating agent through stepwise precipitation; defects are formed by soaking in tetrabutylammonium hydroxide; and surface modification is performed with WO3. According to the present invention, the WO3-CoMn2O4 catalyst exhibits good NH3 catalytic performance and good N2 selectivity, can achieves the NH3 conversion rate of 100% and the N2 selectivity of more than 90% at a temperature of 200 DEG C,and can remain unchanged after stable operation for 24 h, such that the results show that the WO3-CoMn2O4 catalyst has advantages of stable structure, excellent catalytic performance and good practical application prospect.
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Description

technical field

[0001] The present invention relates to a WO 3 Selective catalytic oxidation of NH by modified spinel-structured Co-Mn 3 The catalyst and the preparation method thereof belong to the technical field of environment-friendly catalytic treatment. Background technique

[0002] Poor air quality is one of the major environmental concerns in China. Ammonia, as a colorless air pollutant with a pungent odor, is flammable and toxic, posing a threat to human respiratory health and China's atmospheric environment. Although NH in the atmosphere 3 The concentration is much lower than other major air pollutants, such as sulfur dioxide, nitrogen oxides and ozone, but NH 3 Not only does it directly contribute to the generation of inorganic PM2.5 (particulate matter with an aerodynamic diameter less than 2.5 μm), it can also react with gas-phase organic acids to form condensable salts, which in turn plays an important role in the formation of secondary organic aerosols. e...

Claims

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