Method for preparing high-performance carbon material from molasses

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...

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