Hydrothermal carbon as well as preparation method and application thereof

Through the coordinated auxiliary hydrothermal reaction between formaldehyde and acid solution, the problem of low carbon rate of lignin hydrothermal carbonization is solved, and the carbonization rate and material performance are significantly improved. It is suitable for a variety of application fields.

CN119306200APending Publication Date: 2025-01-14HUNAN AGRI UNIV
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Patent Information

Application Number
CN202410449329.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-04-15
Publication Date
2025-01-14

AI Technical Summary

Technical Problem

The prior art is difficult to effectively improve the carbon yield of lignin hydrothermal carbonization, resulting in waste of resources and environmental pollution. In addition, lignin carbonization requires a high hydrothermal strength, and conventional hydrothermal conditions are difficult to completely destroy its chemical structure.

Method used

By adjusting the amount of formaldehyde and acid, the polymerization and carbonization behavior of carbon sources is improved, the microstructure and active sites of hydrothermal carbon are regulated, and the low-temperature hydrothermal heat of lignin is improved. Carbonization rate.

Benefits of technology

The carbon yield of lignin hydrothermal carbon has been significantly improved, for example, from 5.49% to 66.27%, and the performance of carbon-based materials has been improved. It is suitable for carbon-based adsorption, electrodes and soil improvement fields.

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Abstract

The invention belongs to the field of carbon material synthesis, and particularly relates to a preparation method of hydrothermal carbon, which comprises the following steps: carrying out hydrothermal reaction on a mixed solution of a carbon source, formaldehyde and an acid solution, and then separating to obtain the hydrothermal carbon; the carbon source is at least one raw material of cellulose, hemicellulose and lignin or a biomass raw material containing the components. The invention also comprises the hydrothermal carbon prepared by the method and application thereof. The method provided by the invention can improve the carbon yield of the hydrothermal carbon.
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Citation Information

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