A denitration catalyst and its preparation method and application
By using a denitrification catalyst composed of indium, H-Beta molecular sieve and nickel-manganese composite oxide, the problems of high reaction temperature and low CH4 conversion in the prior art are solved, and low temperature and efficient NOx removal and CH4 conversion are achieved, and energy savings are achieved.
CN116174027BActive Publication Date: 2025-03-21HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Patent Information
- Application Number
- CN202310227803.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-02-28
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2043-02-28
AI Technical Summary
Technical Problem
The existing denitrification catalysts have problems such as high reaction temperature, low CH4 conversion rate and large energy consumption, making it difficult to achieve efficient NOx removal and CH4 conversion under low temperature conditions.
Method used
A denitrification catalyst composed of indium, H-Beta molecular sieve and nickel-manganese composite oxide is used to support the nickel-manganese composite oxide on the surface of the H-Beta molecular sieve through hydrothermal method and ion exchange method to form a nano-layer structure.
Benefits of technology
It realizes the denitrification effect of rapid activation under low temperature conditions, high CH4 conversion rate and high NOx removal rate, and saves energy consumption of denitrification equipment.
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Abstract
The present invention discloses a denitration catalyst and its preparation method and application. The denitration catalyst of the present invention comprises indium, H-Beta molecular sieve and nickel-manganese composite oxide, wherein the indium and nickel-manganese composite oxide are both loaded on the surface of the H-Beta molecular sieve; the preparation method of the denitration catalyst comprises the following steps: 1) after mixing permanganate, H-Beta molecular sieve and nickel salt, adding divalent manganese salt, performing hydrothermal reaction and first roasting to obtain nickel-manganese modified H-Beta molecular sieve; 2) mixing the nickel-manganese modified H-Beta molecular sieve and indium salt, performing ion exchange and second roasting to obtain a denitration catalyst. The denitration catalyst of the present invention not only has fast activation, high CH4 conversion rate and NO x It has the advantages of high removal rate, simple preparation, controllable, low cost and energy saving, and is particularly suitable for application in CH4-SCR denitrification equipment or processes.
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