Preparation method of microporous high graphitization odor-removing powder carbon

Using anthracite as raw material, combined with deashing, modification, and potassium ferrate solution impregnation, a highly graphitized, microporous, graphitized deodorizing activated carbon with an iron-carbon composite embedded in a graphitized carbon skeleton was prepared. This solved the problem of large-scale production of activated carbon that combines graphitization and microporous properties in existing technologies, and achieved the effect of highly efficient adsorption of odor substances.

CN121020580BActive Publication Date: 2026-06-23RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Filing Date
2025-07-11
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing technologies make it difficult to produce activated carbon materials with both graphitization and microporous properties at low cost and on a large scale. Furthermore, conventional template methods are unable to form dense microporous structures, which limits their application as high-performance adsorbents.

Method used

Using anthracite as raw material, after deashing and modification, the carbon was impregnated in potassium ferrate solution, and then carbonized and activated by steam to prepare microporous, highly graphitized deodorizing powder carbon with iron-carbon composites embedded in the graphitized carbon skeleton, thus optimizing the microstructure and graphitization properties.

Benefits of technology

The preparation steps were simplified, the microporous structure and adsorption stability of activated carbon were improved, and the adsorption capacity for odor substances, especially the adsorption performance of 2-methylisoborneol and geosmin, was significantly enhanced.

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Abstract

The application discloses a preparation method of microporous high-graphitization odor-removing powder carbon, and belongs to the technical field of activated carbon materials. The method uses anthracite as raw material, carries out desalination through hydrochloric acid and hydrofluoric acid, carries out pretreatment through modification of trimethyl orthophenyl phosphate and titanium acid tetraisobutyl ester, soaks in a potassium ferrate solution, and finally obtains activated carbon with high micropore volume and high graphitization degree through carbonization and steam activation under nitrogen protection. Potassium ferrate acts as a catalyst, and simultaneously promotes the potassium hydroxide activation reaction and the iron-based graphitization process. The method is simple and low in cost, the obtained material has excellent adsorption and stability, significantly improves the adsorption capacity of 2-methyl isoborneol and geosmin, and is suitable for efficient removal of odor substances in drinking water sources.
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