A method for regulating the morphology and structure of biochar

A technology of biochar and morphology, which is applied in the direction of biofuel, special carbonization, coke oven, etc., to achieve the effect of large specific surface area, rich structure and energy saving

Active Publication Date: 2021-05-04
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the existing technology still lacks methods for regulating the morphology of biochar

Method used

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  • A method for regulating the morphology and structure of biochar
  • A method for regulating the morphology and structure of biochar
  • A method for regulating the morphology and structure of biochar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The banana peel is dried, broken into powder and sieved to obtain banana peel powder (80-200 mesh), which is set aside.

[0047] Take banana peel powder and HPMC and mix them in an open container; according to the solid-liquid ratio of 1g (the total weight of banana peel powder and HPMC, wherein HPMC is 0.2 of the weight of banana peel): 5ml, add 35% to the mixed powder Phosphoric acid solution, after stirring evenly, let it stand for 0.5-5h for structure penetration,

[0048] The open container was then put into an oven, and carbonized at 150 degrees Celsius for 24 hours under open conditions.

[0049] After the carbonization is completed, wash with distilled water and alkaline dilute solution until neutral to obtain the finished product, which is a uniform powdery biochar. figure 1 .

Embodiment 2

[0051] Compared with Example 1, the difference is that the phosphoric acid concentration is 40%, and the specific operation is as follows:

[0052] The banana peel is dried, broken into powder and sieved to obtain banana peel powder (80-200 mesh), which is set aside.

[0053] Take banana peel powder and HPMC and mix them in an open container; according to the solid-liquid ratio of 1g (the total weight of banana peel powder and HPMC, wherein, HPMC is 0.2 of the weight of banana peel): 5ml, add 40 % phosphoric acid solution, stir evenly and let stand for 0.5-5h for structure penetration,

[0054] The open container was then put into an oven, and carbonized at 150 degrees Celsius for 24 hours under open conditions.

[0055]After the carbonization is completed, wash with distilled water and alkaline dilute solution until neutral to obtain the finished product, which is a uniform powdery organism.

Embodiment 3

[0063] Banana peels are dried, crushed into powder and screened to obtain banana peel powder (80-200 mesh) for use.

[0064] Take banana peel powder and HPMC and mix them in an open container; according to the solid-liquid ratio of 1g (the total weight of banana peel powder and HPMC, where HPMC is 0.2 of the weight of banana peel): 15ml, add 80 % phosphoric acid solution, stir evenly and let stand for 0.5-5h for structure penetration,

[0065] The open container was then put into an oven, and carbonized at 150 degrees Celsius for 24 hours under open conditions.

[0066] After the carbonization is completed, wash with distilled water and alkaline dilute solution until neutral to obtain the finished product, which is sludge-like biochar. figure 2 .

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Abstract

The invention belongs to the field of biochar preparation, and specifically discloses a method for regulating the morphology and structure of biochar, which comprises carbonizing a raw material aqueous solution containing lignocellulosic biomass, HPMC, and phosphoric acid at 100-400°C in an oxygen-containing atmosphere; By controlling the concentration and / or solid-to-liquid ratio of phosphoric acid added in the raw material aqueous solution, the morphology of the carbonized product is regulated. The present invention finds that in the raw material aqueous solution comprising lignocellulosic biomass, HPMC and phosphoric acid, by controlling the concentration of phosphoric acid in the raw material aqueous solution and further assisting in the control of the solid-liquid ratio on this basis, it is possible to regulate Morphology of biochar obtained by carbonization in an oxygen-containing atmosphere.

Description

technical field [0001] The invention belongs to the field of biochar preparation, and in particular relates to a method for regulated preparation of biochars with different morphology and structures in a low-temperature open environment. Background technique [0002] Biochar is a solid product produced by high temperature pyrolysis of biological organic materials (biomass) in an anoxic or anaerobic environment. It can be used not only as a high-quality energy source and soil improver, but also as a reducing agent, fertilizer slow-release carrier and carbon dioxide sequestration agent. It has been widely used in carbon sequestration and emission reduction, water purification, heavy metal adsorption and soil improvement. Provide solutions to hot issues of global concern such as climate change, environmental pollution and soil functional degradation. [0003] The production of biochar is an economical and feasible way to fix carbon dioxide. It not only fixes the absorbed carbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/02
CPCC10B53/02Y02E50/10
Inventor 周南李娟周智钟美娥
Owner HUNAN AGRICULTURAL UNIV
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