Wide-temperature-resistant high-antitoxic NH3-SCR (selective catalytic reduction) denitration catalyst and preparation method thereof

By loading molybdenum oxide and adding tantalum oxide and bismuth oxide resin in the NH3-SCR denitrification catalyst, the problems of poor durability and insufficient SO2 resistance at high temperatures are solved, and the catalyst's medium and low temperature activity and service life are improved, reducing power plant operating costs and reducing environmental pollution.

CN119680632APending Publication Date: 2025-03-25SHAANXI QINLONG ELECTRIC POWER CO LTD +1
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Patent Information

Application Number
CN202411953283.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The existing NH3-SCR denitrification catalysts have poor durability and insufficient SO2 resistance to toxicity at high temperatures, resulting in poor denitrification performance and short service life, increasing the operating costs of power plants, and the waste catalysts contain toxic substances, causing environmental pollution.

Method used

By supporting molybdenum oxide in traditional V2O5/TiO2 catalysts, the tantalum oxide and bismuth oxide resin components are increased, and the monodispersion of the cocatalyst metal is achieved using ion exchange resins, thereby improving the catalyst's resistance to SO2 toxicity, dust resistance and catalytic activity.

Benefits of technology

It significantly improves the medium and low temperature activity and temperature resistance range of the catalyst, extends the service life, reduces the operating costs of the power plant, and reduces environmental pollution.

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Abstract

The invention provides a wide-temperature-resistant high-antitoxic NH3-SCR denitration catalyst and a preparation method thereof.The catalyst comprises, by weight, 100 parts of a main catalyst including 1-20 parts of titanium oxide, 2-10 parts of vanadium oxide, 1-5 parts of molybdenum oxide and 0-5 parts of tungsten oxide; the cocatalyst comprises 1-5 parts of tantalum oxide and 1-2 parts of bismuth oxide; the balance is a molecular sieve carrier. According to the scheme, the SO2 toxicity resistance of a traditional V2O5 / TiO2 catalyst can be enhanced through loading of molybdenum oxide, so that the denitration performance of the catalyst is improved; by adding the high-dispersion tantalum oxide and bismuth oxide resin components, the dust resistance, dirt blockage resistance and catalytic metal loss resistance of the catalyst are improved, and the service life of the catalyst is prolonged exponentially.
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