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Process for preparing carbon nanospheres from bagasse

A technology of carbon nanospheres and bagasse, applied in the direction of nano-carbon, can solve the problem of high cost, achieve the effect of reducing production cost and realizing resource utilization

Inactive Publication Date: 2017-05-10
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional preparation process of this type of carbon nanospheres is relatively expensive

Method used

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  • Process for preparing carbon nanospheres from bagasse

Examples

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Effect test

Embodiment 1

[0022] Soak bagasse in sulfuric acid-water as a solvent, wherein the mass concentration of sulfuric acid is 45%, 55%, 65% and 70% respectively. Under different concentrations of sulfuric acid, the bagasse has obvious gradual shrinkage and dissolution process. When the sulfuric acid solubility is 70%, there is basically no long rod-shaped bagasse after being placed for 2 hours, and most of them have become a solution. As time goes on, the color of the solution deepens, indicating that the bagasse has undergone hydrolysis and is accompanied by carbonization. At the same time, the concentration of sulfuric acid gradually decreased, and the hydrolytic carbonization also weakened accordingly. After 20 hours at room temperature, there was essentially no further change in bagasse size and solution color. After standing at room temperature for 24 hours, add water to the above-mentioned 4 kinds of solutions to reduce the mass solubility of sulfuric acid to about 5%, and then filter to ...

Embodiment 2

[0024]When using phosphoric acid-sulfuric acid aqueous solution (the mass ratio of sulfuric acid-phosphoric acid is 3:7) as the solvent, carbon spheres were prepared by hydrothermal method, and the effects on the size of carbon spheres when the mass concentrations of sulfuric acid were 12%, 15%, 18% and 21% were investigated. Impact. Soak the bagasse in phosphoric acid-sulfuric acid aqueous solution with different concentrations of sulfuric acid, and leave it at room temperature for 24 hours, due to the dissolution of the bagasse by the solvent. Bagasse also has an obvious process of gradually shrinking and dissolving. When the sulfuric acid solubility is 21%, after standing for 2 hours, most of the long rod-shaped bagasse is dissolved and becomes a solution. As time goes on, the color of the solution deepens, while the sulfuric acid solubility decreases, and the hydrolysis and carbonization also weakens accordingly. After the above four systems were placed for 24 hours, add ...

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Abstract

The invention relates to a process for preparing carbon nanospheres from bagasse. The process comprises a raw material selection work procedure, a hydrothermal reaction work procedure and a carbon sphere separation work procedure, wherein in the raw material selection work procedure, the bagasse is selected and used, and is put into a solvent, so that cellulose and hemicelluloses in the bagasse are dissolved in the solvent; the solvent is filtered to obtain filter liquid; the filter liquid is fed into the hydrothermal reaction work procedure to perform hydrothermal reaction. Low molecular weight sugar in the bagasse is dissolved out; then, an obtained low molecular weight sugar solution is used for preparing carbon spheres by a hydrothermal method. The bagasse is a sugar preparation industry byproduct, has the main ingredients of cellulose accounting for 32 to 48 percent, and secondary ingredients of lignin accounting for 23 to 32 percent and hemicelluloses accounting for 19 to 24 percent, and belongs to a material containing rich carbon sources; the carbon material preparation by using the bagasse belongs to a novel path for high-value integral utilization of the bagasse. The cheap raw material of the waste biomass is used as a carbon source for preparing the carbon spheres, so that the production cost of the carbon spheres is reduced; the effect of changing waste into resources is also achieved; the important practical social and economic significance is realized.

Description

technical field [0001] The invention relates to a process for preparing carbon nanospheres from bagasse, which belongs to the field of carbon material preparation. Background technique [0002] Due to their excellent thermal conductivity, chemical inertness, heat resistance, and electrical conductivity, carbon materials have been widely used in chemical, mechanical, battery, and aviation fields. Carbon materials with different morphologies have different application values ​​in many aspects, and carbon materials with unique structures have attracted extensive attention. Due to the advantages of large specific surface area, low density, and stable physical and chemical properties, carbon spheres are widely used as an important carbon material in catalyst supports, lubricants, lithium-ion battery anode materials, and gas adsorption materials. [0003] In the 1960s, it was found that pitch-like compounds undergo mesophase transformation during heat treatment to form spherical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15
CPCC01P2004/03C01P2004/61C01P2004/62
Inventor 吴启辉
Owner QUANZHOU NORMAL UNIV
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