Preparation method of molecular sieve-based low-temperature environment-friendly SCR denitration catalyst

The technology of denitration catalyst and molecular sieve is applied in the field of preparation of molecular sieve-based low-temperature environment-friendly SCR denitration catalyst, which can solve the problems of narrow active temperature window, catalyst soot poisoning and deactivation, loss of secondary pollution, etc.
CN112657541AActive Publication Date: 2021-04-16CNOOC TIANJIN CHEM RES & DESIGN INST
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CNOOC TIANJIN CHEM RES & DESIGN INST
Publication Date
2021-04-16

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Abstract

The invention discloses a preparation method of a molecular sieve-based low-temperature environment-friendly SCR denitration catalyst, which comprises the following steps: by using a ZSM-5 molecular sieve as a carrier and Fe2O3 modified or supported Fe2O3 and CuO as active components, mixing with ceramic powder, a binder and an additive under acidic conditions, stirring, kneading or coating to obtain the molecular sieve-based low-temperature environment-friendly SCR denitration catalyst. The catalyst prepared by the invention can efficiently remove nitrogen oxide under a low-temperature condition, and has the advantages of reducing the denitration reaction temperature, widening the active temperature window of the denitration process and improving the design flexibility of the denitration and desulfurization process flow. The advantages of water vapor aging resistance, good stability and the like are realized. In the preparation process of the catalyst, the raw materials are cheap and easy to obtain, the preparation cost is low, harmful substances with secondary pollution cannot be generated in the use, replacement and regeneration processes of the catalyst, and compared with a traditional SCR denitration catalyst, the SCR denitration catalyst has the obvious advantage of environmental friendliness.
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Description

technical field

[0001] The invention relates to a preparation method of a molecular sieve-based low-temperature environment-friendly SCR denitrification catalyst. Background technique

[0002] In the process of industrial production, the direct utilization and deep processing of coal and petroleum resources, automobile exhaust emissions, catalyst production and preparation will produce a large amount of nitrogen oxides. It is estimated that the global emissions of nitrogen oxides will reach 30 million tons in 2020. These nitrogen oxides can produce low-altitude harmful ozone, photochemical smog, acid rain, smog, damage the high-altitude ozone layer, and produce potentially carcinogenic substances, which will cause great harm to the living environment of humans, animals and plants. In recent years, my country's energy supply is still mainly realized through the direct combustion of coal, so the elimination of pollutants such as nitrogen oxides is urgent.

[0003] my country...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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