Activated carbon and method for removing volatile organic compounds and mercury from flue gas by adsorption

By preparing activated carbon loaded with multi-metal active sites, the problem of low adsorption efficiency of activated carbon in high-temperature flue gas is solved, and efficient synergistic removal of volatile organic compounds and mercury is achieved, which reduces costs and is suitable for industrial flue gas purification.

CN119873817BActive Publication Date: 2025-10-03HANGZHOU DIANZI UNIV
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Patent Information

Application Number
CN202510016602.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-06
Publication Date
2025-10-03
Estimated Expiration
2045-01-06

AI Technical Summary

Technical Problem

Existing activated carbon has low adsorption efficiency for volatile organic compounds and mercury in high-temperature flue gas, and its preparation cost is high, making it difficult to apply on a large scale in industrial applications.

Method used

Agricultural waste and waste ternary lithium battery positive electrode materials are used as raw materials, and activated carbon loaded with multi-metal active sites is prepared through carbonization, impregnation and alkaline activation to form multi-metal oxide and solid solution sites to enhance the adsorption performance.

Benefits of technology

The chemical adsorption capacity for volatile organic compounds and mercury is improved under medium and high temperature environments, the production cost is reduced, and the synergistic removal of complex pollutants is achieved, making it suitable for large-scale industrial applications.

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Abstract

The present invention discloses an activated carbon and a method for removing volatile organic compounds and mercury from flue gas by adsorption. Agricultural waste and waste lithium-ion battery positive electrode materials are used as raw materials, the waste lithium-ion battery positive electrode materials are immersed in an acid solution to extract highly active metal components, and a mixed metal ion solution of a specific concentration is formed; the agricultural waste particles are crushed and preliminarily carbonized under an inert atmosphere to obtain a small amount of base carbon with specific pores; the base carbon is immersed in a mixed metal ion solution to obtain base carbon loaded with metal components; the base carbon loaded with metal ions is mixed with an alkaline activator, and the pore structure of the rich carbon is activated under an inert atmosphere to optimize the distribution and existence form of the metal components on the carbon surface, and finally an activated carbon with rich metal active sites and excellent adsorption performance is obtained. The present invention makes full use of the currently large volume of solid waste as raw materials, has a simple preparation method, low energy consumption, and fully guarantees industrial large-scale production and application.
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