Method for preparing high-performance carbon material from molasses

A high-performance, carbon material technology, applied in the field of preparing high-performance carbon materials, to achieve the effects of developed pores, good electrochemical properties and small loss

Inactive Publication Date: 2015-12-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, the research on the fermentation of molasses is approaching maturity, but it also faces certain problems, such as the treatment of waste mash in the process of alcohol production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: The beet molasses with a sugar concentration of 8.8% was dehydrated and carbonized at 180°C for 6 hours, washed and dried at 120°C for 12 hours to obtain colloidal charcoal, with a yield of 25%-39%. The colloidal carbon pellets were pretreated at 500℃ for 1h and mixed with 85% by mass phosphoric acid at a solid-to-liquid mass ratio of 1:3, and then activated at 500℃ for 1h. The resulting product was washed with water to pH=6-7, 120℃ After drying for 12 hours, it was filled with nitrogen and heat treated at 800°C for 1 hour to obtain porous carbon with relatively developed pores and a specific capacitance value of 137.0F / g.

Embodiment 2

[0014] Example 2: The colloidal carbon balls in Example 1 were pretreated and mixed with phosphoric acid with a mass concentration of 85% at a solid-liquid mass ratio of 1:4 to obtain porous carbon with a specific capacitance value of 117.1 F / g.

Embodiment 3

[0015] Example 3: The colloidal carbon balls in Example 2 were reacted with phosphoric acid with a mass concentration of 85% at 600° C., and the specific capacitance value of the obtained porous carbon was 50.4 F / g.

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PUM

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Abstract

The invention discloses a method for preparing a high-performance carbon material from molasses. The method comprises the following concrete steps: firstly, subjecting beet molasses with sugar-containing concentration of 8.8% to 52.5% to dehydration and carbonization for 2 to 10 h under the condition of 120 to 180 DEG C, carrying out washing and then carrying out drying for 12 h under the condition of 120 DEG C so as to obtain a colloidal carbon sphere with a size of 1 [mu]m to 10 [mu]m, then pretreating the obtained colloidal carbon sphere for 1 h under the condition of 500 DEG C, then carrying out activating treatment with concentrated phosphoric acid or KOH, subjecting an obtained product to washing until the pH is equal to 6 to 7, then carrying out drying for 12 h under the condition of 120 DEG C, and carrying out heating treatment for 1 h under the condition of 800 DEG C by filling of nitrogen so as to obtain a porous carbon material. The invention has the following beneficial effects: the colloidal carbon prepared from the molasses by hydrothermal treatment, after regulation of the KOH, has more developed porosity, can maintain morphology of the carbon sphere, and has a particle size of 1 [mu]m to 10 [mu]m; whether the colloidal carbon is regulated by the phosphoric acid or etched by potassium hydroxide, the obtained porous carbon material has high yield and small loss; and specifically, the porous carbon prepared from phosphoric acid has a yield up to 79.2%.

Description

Technical field [0001] The invention relates to a method for preparing high-performance carbon materials, in particular to a method for preparing high-performance carbon materials from molasses. Background technique [0002] At present, serious environmental pollution has attracted more and more attention with the recent appearance of haze. Solving the problem of waste gas and waste caused by industrial and agricultural production has become the primary task of environmental protection. Many scientific researchers are committed to recycling them (such as rice husks, corn cobs, straws, nut shells, sawdust, etc.) to achieve sustainable use of resources. For example, in patent CN102205963A, using wastes such as rice husks and corncobs as raw materials, activated carbon with high specific surface area and high specific capacitance value is prepared, which not only alleviates environmental pollution, but also reduces the production cost of activated carbon. [0003] Molasses is a by-pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 郭玉鹏韩雪邹博顾小雪庞丽云曹礼媛王威王子忱
Owner JILIN UNIV
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