A CO and PM 2.5 Multifunctional filter material for synergistic removal of pollutants and method for its production

By using composite-connected anti-sulfur functional membranes and catalytic filter media in bag filters, the synergistic removal of CO and PM2.5 is achieved, solving the problems of complex equipment and easy catalyst poisoning in existing technologies, and realizing efficient and low-cost flue gas treatment.

CN120714325BActive Publication Date: 2026-06-09NANJING UNIV OF INFORMATION SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-07-11
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing technologies, flue gas treatment systems in the steel and cement industries require independent dust removal and CO removal equipment, resulting in complex and costly equipment. Furthermore, the catalysts are prone to poisoning and deactivation, making it difficult to effectively remove PM2.5.

Method used

The anti-sulfur functional membrane and catalytic filter material are compositely connected, including the filter material base cloth and the hollow egg yolk shell structure catalytic interface. The core is Cu-Mn-Fe-Sn-La-Pd-Ox composite oxide, and the shell is Si-Zr-Ce-Ox composite oxide. The multifunctional filter material is formed by hot pressing to achieve the synergistic removal of CO and PM2.5.

Benefits of technology

This technology achieves efficient removal of CO and PM2.5 in existing baghouse dust collectors, reducing flue gas treatment costs, extending catalyst lifespan, and improving removal efficiency. Furthermore, it achieves a PM2.5 removal rate exceeding 99.9% within the range of 160~220℃, and a CO removal rate exceeding 90% under conditions where SO2-free flue gas is present.

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Abstract

The application discloses a kind of CO and PM 2.5 Multifunctional filter material for synergistic removal of CO and PM and preparation method thereof, comprising a sulfur-resistant functional membrane and a catalytic filter material obtained by hot pressing, wherein the catalytic filter material comprises a filter base cloth and a hollow yolk shell structure catalytic interface wrapped on the surface of the filter base cloth; the hollow yolk shell structure catalytic interface comprises a core, a hollow layer and a shell layer; the core is Cu-Mn-Fe-Sn-La-Pd-O x composite oxide; and the shell layer is Si-Zr-Ce-O x composite oxide. The multifunctional filter material prepared by the application can effectively remove CO and PM 2.5 , has excellent stability and sulfur poisoning resistance, and can be directly used in existing bag-type dust collectors without the need for additional CO treatment equipment, greatly reducing the cost of flue gas treatment.
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Citation Information

Patent Citations

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