Carbon sponge supported nanometer array monolithic catalyst, its preparation method and application

By introducing nitrogen-doped carbon sponge and nano-metal oxides into a manganese-based catalyst, a low-temperature, high-efficiency, and sulfur-resistant monolithic catalyst was prepared, solving the problems of complex preparation, high cost, and easy detachment of active components in the existing technology, and achieving high-efficiency denitrification and good stability at low temperature.

CN117181257BActive Publication Date: 2026-02-24HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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Patent Information

Application Number
CN202310982284.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-07
Publication Date
2026-02-24
Estimated Expiration
2043-08-07

AI Technical Summary

Technical Problem

Existing manganese-based monolithic denitrification catalysts for industrial applications have complex preparation processes, high costs, easy loss of active components, poor low-temperature activity, weak resistance to sulfur poisoning, and high costs for waste catalyst disposal.

Method used

Using nitrogen-doped carbon sponge as a substrate and combining it with nano-metal oxides, a carbon sponge-supported nanoarray monolithic catalyst was prepared through hydrothermal reaction. This catalyst provides more active sites and good flexibility, with strong adhesion of active components, and exhibits low-temperature catalytic activity, stability, and resistance to water and sulfur.

Benefits of technology

It achieves efficient denitrification at low temperatures, with low catalyst bed resistance, minimal detachment of active components, a wide operating temperature window, and good water and sulfur resistance, thus reducing preparation and processing costs.

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Abstract

The application belongs to the field of catalysis technology, and discloses a carbon sponge supported nanometer array monolithic catalyst, a preparation method and application thereof, and comprises the following steps: (1) preparing nitrogen-doped carbon sponge; (2) preparing a precursor solution: dissolving metal salt in water, then adding a precipitant to prepare the precursor solution; the metal salt is manganese acetate and metal nitrate, and the metal nitrate is rare earth metal nitrate and / or transition metal nitrate; (3) adding a template agent to the precursor solution, stirring until completely dissolved, adding nitrogen-doped carbon sponge, then performing hydrothermal reaction, cooling, washing, and drying to obtain the carbon sponge supported nanometer array monolithic catalyst. The preparation method is green and efficient, the denitration efficiency of the prepared catalyst can reach 100%, the catalyst has high sulfur and water resistance, and the waste catalyst is easy to handle.
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