Titanium dioxide material and high-temperature denitration catalyst

By covering the solid solution of the lattice inhibitor element oxide on the surface of anatase TiO2, the problem of the decrease in efficiency of anatase TiO2 catalyst at high temperature is solved, and a high-temperature denitrification catalyst with a high-efficiency wide temperature window is achieved, and the high-temperature stability and denitrification performance of the catalyst are maintained.

CN119951487AActive Publication Date: 2025-05-09PETROCHINA CO LTD
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Patent Information

Application Number
CN202311490890.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-11-09
Publication Date
2025-05-09
Estimated Expiration
2043-11-09

AI Technical Summary

Technical Problem

The existing anatase-type TiO2 catalysts transform fine grains into rutile at high temperatures, resulting in a decrease in denitrification efficiency and a lack of high-temperature denitrification catalysts with a wide temperature window.

Method used

By coating the surface of the anatase type TiO2 with a solid solution composed of anatase type TiO2 and a lattice inhibitor element oxide, a titanium dioxide material with a high lattice transition temperature is formed, and is used to prepare a high-temperature denitrification catalyst.

Benefits of technology

The specific surface area is maintained at 500°C, which improves the tolerance of denitrification catalysts in the range of 420-500°C and extends the high-temperature operating life of the catalyst.

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Abstract

The invention provides a titanium dioxide material and a high-temperature denitration catalyst. The preparation method of the titanium dioxide material comprises the following steps: mixing salt containing lattice inhibitor elements, a titanium source and water to obtain a solution; dispersing anatase type titanium dioxide powder into ethanol to obtain dispersion liquid; uniformly mixing the dispersion liquid with the solution, and then adding alkali liquor for reaction; and drying and roasting the precipitate obtained by the reaction to obtain the titanium dioxide material. The preparation method of the high-temperature denitration catalyst comprises the following steps: uniformly mixing an active component precursor, an auxiliary active component precursor, ammonia water and water to obtain a solution, then uniformly mixing the solution with a carrier, drying and roasting to obtain the high-temperature denitration catalyst, wherein the carrier is the titanium dioxide material provided by the invention.
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Citation Information

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