Method for preparing carbon monoxide normal-temperature oxidation catalyst based on electrolytic manganese residues and landfill leachate

A carbon monoxide oxidation catalyst at room temperature was prepared by mixing electrolytic manganese slag with landfill leachate. By utilizing the synergistic effect of bioactive components and metal elements, the problems of high cost and poor moisture resistance of precious metal catalysts were solved, achieving high efficiency in CO oxidation and making it suitable for room temperature and high humidity environments.

CN121847199APending Publication Date: 2026-04-14CHANGSHU INSTITUTE OF TECHNOLOGY
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Patent Information

Application Number
CN202610313421.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-16
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

Existing precious metal catalysts are expensive and easily poisoned, while non-precious metal catalysts require high temperatures to start up and have poor moisture resistance. Carbon-based catalysts have insufficient activity at room temperature, and electrolytic manganese slag and landfill leachate are difficult to treat, resulting in insufficient performance of CO oxidation catalysts under normal temperature and high humidity conditions.

Method used

Electrolytic manganese slag is mixed with landfill leachate, and aryl alcohol dehydrogenase, fly ash, and red mud are added. Through low-temperature plasma treatment and hydrothermal reaction, cerium nitrate solution is impregnated to form a multi-component composite catalyst. The synergistic effect of bioactive components and metal elements generates porous carbon with high specific surface area and active sites, thereby enhancing catalytic performance.

Benefits of technology

A low-cost, highly active, and highly moisture-resistant room-temperature CO catalyst was prepared, suitable for high-humidity environments of 20–40℃, significantly improving the catalyst's oxidation efficiency and environmental and economic benefits.

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Abstract

The invention discloses a method for preparing a carbon monoxide normal-temperature oxidation catalyst based on electrolytic manganese residues and landfill leachate. The method comprises the following steps: soaking and purifying the electrolytic manganese residues with deionized water to obtain preliminarily purified electrolytic manganese residues; mixing aryl alcohol dehydrogenase, the preliminarily purified electrolytic manganese residues and the landfill leachate, and standing to obtain enzymolysis electrolytic manganese residue slurry; mixing fly ash, red mud and the enzymolysis electrolytic manganese slag slurry, uniformly stirring, drying and grinding to obtain a multi-component composite raw material; placing the multi-component composite raw material in low-temperature plasma equipment for irradiation to obtain a plasma activated composite material; and carrying out hydrothermal reaction on the plasma activated composite material to obtain a hydrothermal structure composite material, dipping the hydrothermal structure composite material in a solution containing cerium nitrate, drying, and roasting to obtain the carbon monoxide normal-temperature oxidation catalyst. The carbon monoxide normal-temperature oxidation catalyst with high activity and high moisture resistance is prepared by utilizing industrial wastes and landfill leachate enzymolysis derivative liquid.
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