Preparation method and application of multi-level hole biomass activated carbon

Multi-level porous biomass activated carbon was prepared by compounding agricultural and forestry waste with industrial by-products and treating it with a three-component activator. This solved the problems of limited raw material supply and high cost in activated carbon preparation, and improved adsorption performance and application range.

CN121516868BActive Publication Date: 2026-06-23HEZE BRANCH QILU UNIV OF TECH(SHANDONG ACAD OF SCI
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Patent Information

Application Number
CN202511712346.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-11-20
Publication Date
2026-06-23
Estimated Expiration
2045-11-20

AI Technical Summary

Technical Problem

In existing technologies, using pure agricultural and forestry waste as raw materials for activated carbon preparation has the problems of seasonal supply limitations and low carbon yield. Using pure industrial by-products increases preparation costs and results in a single pore size, which affects adsorption efficiency.

Method used

Agricultural and forestry waste and industrial by-products are mixed in a certain proportion, and a three-component composite activator of KOH-ammonium dihydrogen phosphate-silica is used. Through etching, expansion and adjustment of pore structure, multi-level porous biomass activated carbon is formed. Combined with temperature-controlled acid washing and ultrasonic vibration treatment, residual activator and impurities are removed.

Benefits of technology

This approach achieves complementary advantages of raw materials, reduces production costs, improves adsorption efficiency, expands the application of activated carbon in the food and pharmaceutical fields, simplifies the nitrogen doping process, and enhances the porosity and adsorption performance of activated carbon.

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Abstract

The application discloses a preparation method and application of a multi-level pore biomass activated carbon, and belongs to the technical field of activated carbon preparation. The method uses a mixture of nitrogen-rich agricultural and forestry wastes and industrial by-products as raw materials, optimizes a pretreatment process, innovates a composite activation system, and controls carbonization-activation parameters, so that a biomass-based activated carbon rich in nitrogen elements and having multi-level pores is prepared. The nitrogen elements in the raw materials can be used for nitrogen doping of the activated carbon in the carbonization-activation process. The application effectively solves the problems of low utilization rate of raw materials, single pores and the like in the existing activated carbon preparation process, solves the problem of difficult treatment of industrial by-products, simultaneously simplifies the preparation process of the nitrogen-rich activated carbon, has economic value and environmental protection benefits, and can be widely applied to the fields of water treatment, carbon capture and deep treatment of industrial wastewater and the like.
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