Catalysts with oxygen reverse flooding effect, process for their preparation and use

By doping metal atoms M onto a TiO2 support and loading noble metals, an oxygen reverse overflow effect catalyst was prepared, which solved the problem of deactivation of noble metal catalysts in the presence of SO2 and water vapor, achieving efficient CO oxidation and stability, and making it suitable for industrial applications.

CN116966904BActive Publication Date: 2026-06-02TSINGHUA UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TSINGHUA UNIVERSITY
Filing Date
2023-08-28
Publication Date
2026-06-02

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Abstract

The present application provides a catalyst with oxygen reverse flooding effect and its preparation method and use. The catalyst comprises: a carrier, the carrier comprises a composite oxide Ti 1‑ x M x O2; wherein M is one or a combination of two or more of Co, Cr, Zr, Mo, W, Fe, Ce, Ni, Sm and Nb, and x is 0.01-0.99; and an active component, the active component is loaded on the surface and / or inside of the carrier, and the active component is a noble metal; and the content of the active component is 0.1% or more, preferably 0.1-1%, more preferably 0.1-0.5%, based on the total mass of the catalyst being 100%. The catalyst with oxygen reverse flooding effect of the present application shows good CO oxidation efficiency in the range of 100-350℃, and has stable sulfur and water resistance.
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