Corrugated SCR catalyst and preparation method thereof

The preparation of corrugated SCR catalysts by combining electrodeposition and hydrothermal heat solves the problem of numerous materials used in the prior art and difficult to control the coating amount, and achieves efficient and controllable catalyst preparation and improves denitrification efficiency.

CN119657113APending Publication Date: 2025-03-21QINGDAO HUASHIJIE ENVIRONMENT TECHNOLOGY CO LTD +1
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Patent Information

Application Number
CN202311210153.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-19
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

The existing corrugated catalyst preparation process uses a wide variety of materials, and the coating amount is difficult to control, resulting in low yield, strict substrate size restrictions and poor applicability.

Method used

The preparation method of corrugated catalysts with main electrodeposition and auxiliary hydrothermal heat is adopted to optimize the material types, improve the yield and reduce the impact of substrate size on production by electrochemical in-situ deposition of active components.

Benefits of technology

The process route is optimized, and the operation is at room temperature and pressure, which avoids interlayer heat diffusion, fast deposition speed, precise control of the amount of active components, and improves the denitrification efficiency of the catalyst.

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Abstract

The invention provides a corrugated SCR catalyst and a preparation method thereof, and belongs to the field of denitration. The preparation method comprises the following steps: adding nitric acid into a mixed solution of a sodium tungstate dihydrate solution and hydrogen peroxide to obtain an electrolyte; carrying out first electrodeposition treatment on a substrate by using the electrolyte, and carrying out first drying on a product; preparing a homogeneous phase mixed system of a sodium tungstate dihydrate aqueous solution, a hydrochloric acid aqueous solution, oxalic acid and ammonium sulfate, then adding the first electrodeposition product, carrying out a hydrothermal reaction, and carrying out washing, secondary drying and cooling on the obtained product to obtain a single-component WO3 catalyst; loading CeO2 on the single-component WO3 catalyst through second electrodeposition treatment, and then carrying out third drying and roasting. The corrugated SCR catalyst is prepared by the preparation method. The preparation method of the SCR catalyst is easy to operate, the coating composition is single, the adverse effect of the size of the base material on production is reduced, and practical engineering application is facilitated. The obtained catalyst is high in denitration efficiency.
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