A catalyst resistant to sulfur poisoning, and a preparation method and application thereof

The sulfur poisoning resistant catalyst prepared by the impregnation method utilizes oxalic acid as a vanadium source to support platinum and vanadium, which solves the problems of low activity and easy poisoning of existing catalysts, and achieves high efficiency in catalytic carbon monoxide oxidation and improved sulfur resistance.

CN118976488BActive Publication Date: 2026-05-26INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202411268168.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-11
Publication Date
2026-05-26
Estimated Expiration
2044-09-11

AI Technical Summary

Technical Problem

Existing anti-sulfur poisoning catalysts have low activity and are difficult to effectively degrade carbon monoxide in flue gas from the steel industry, while also posing a problem of sulfur dioxide poisoning.

Method used

A sulfur poisoning resistant catalyst was prepared by impregnation. Oxalic acid was used as a vanadium source to simultaneously load platinum and vanadium onto the surface of an alumina support. Vanadium acted as a sacrificial agent to adsorb sulfur oxides and protect the active sites of platinum. The one-step impregnation method eliminated the molding step, resulting in a clean and low-cost production process.

Benefits of technology

The prepared catalyst has excellent sulfur resistance and high activity, and can effectively catalyze the oxidation of carbon monoxide, while maintaining high efficiency after sulfidation.

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Abstract

This invention relates to an anti-sulfur poisoning catalyst, its preparation method, and its application. The preparation method includes: mixing a platinum source, a vanadium source, oxalic acid, aluminum oxide, and a solvent under stirring conditions to obtain a suspension; the suspension is then dried and sintered to obtain the anti-sulfur poisoning catalyst. The anti-sulfur poisoning catalyst prepared by this invention exhibits excellent anti-sulfur performance and high activity. Through the sacrificial action of vanadium, it adsorbs sulfur oxides, thereby protecting the platinum active sites. This invention employs an impregnation method, utilizing oxalic acid as a co-solubilizer for the vanadium source, resulting in a clean and low-cost production process with promising application prospects.
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