Preparation method and application of catalyst for synergistic removal of NOx and CO

By employing a high silica-to-alumina ratio molecular sieve support and a liquid-phase reducing agent-assisted impregnation method in Ir-based catalysts, the orderly combination of Ir ions and promoter ions is achieved, solving the problem of reduced activity of Ir-based catalysts under oxygen-rich conditions. This enables efficient synergistic removal of NOx and CO, exhibiting good thermal stability and reaction selectivity.

CN120920051AActive Publication Date: 2025-11-11INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202511288168.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-10
Publication Date
2025-11-11
Estimated Expiration
2045-09-10

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Abstract

The invention discloses a preparation method and application of a catalyst for synergistically removing NOx and CO, and belongs to the technical field of catalytic reduction of nitrogen oxides. The catalyst comprises a molecular sieve carrier with a high silica-alumina ratio and an Ir-based bimetallic cluster. A high-silica-alumina-ratio molecular sieve carrier is adopted to limit an Ir-based bimetallic cluster, and an auxiliary agent preoccupies hydroxyl sites on the surface of the high-silica-alumina-ratio molecular sieve carrier, so that ordered combination of Ir ions and auxiliary agent ions is realized. Meanwhile, under the action of a liquid-phase reducing agent, the charge density of active sites is improved. The catalyst solves the problems of difficult regulation and control of active sites, insufficient stability and the like of the catalyst for catalytic reduction of NOx by CO under a high-oxygen condition, simplifies the traditional preparation process, shortens the preparation period and reduces the cost. The prepared catalyst has excellent catalytic activity, is suitable for efficient removal of nitrogen oxides in a complex flue gas environment, and has a wide industrial application prospect.
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Citation Information

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Cited By

  • Catalyst for synergistically removing nitrogen oxides and carbon monoxide under high-oxygen condition as well as preparation method and application of catalyst

    CN121669304A