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Preparation method of biomass-based colloidal carbon

A biomass-based colloidal technology, applied in the field of preparation of biomass-based colloidal carbon

Inactive Publication Date: 2011-10-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the previous work, the present invention uses the renewable resource biomass with wide sources and low price as raw material, first acid hydrolyzes the biomass, and then utilizes the hydrolyzed solution for in-situ polycondensation and carbonization to prepare 160-2000nm Colloidal carbon, this method of preparing colloidal carbon from biomass has not yet been patented

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Mix corncobs with 3wt% sulfuric acid solution at a solid-to-liquid ratio of 1:5 (Kg / L), hydrolyze for 30 minutes at a temperature of 95° C., and filter to obtain xylose solution and filter residue (I); The acid concentration of the xylose solution is 3wt%, and it is hydrothermally reacted in a 140°C reactor for 8 hours, and the solid and liquid are separated by filtration; the solid is washed and dried to prepare colloidal carbon spheres with xylose as a precursor and a particle size of 1040nm.

Embodiment 2

[0012] Example 2: Change the acid concentration in the xylose solution to 5 wt%, and other conditions are the same as in Example 1, and prepare colloidal carbon spheres with xylose as a precursor and a particle size of 1123 nm.

Embodiment 3

[0013] Example 3: Change the hydrothermal reaction temperature to 180° C., and other conditions are the same as in Example 1, and prepare colloidal carbon spheres with xylose as a precursor and a particle size of 1323 nm.

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PUM

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Abstract

The invention discloses a preparation method of biomass-based colloidal carbon and in particular relates to a colloidal carbon ball using xylose or glucose as a precursor. The colloidal carbon ball is prepared by hydrolyzing biomass by using dilute acid or concentrated acid respectively to obtain saccharic acid solution of xylose and glucose and performing in-situ polycondensation and carbonization on the saccharic acid solution. The preparation method particular comprises the following steps of: hydrolyzing the biomass by using dilute acid at a certain concentration; filtering to obtain xylosic acid solution and filter residues; adjusting the concentration of the saccharic acid solution and performing polycondensation and carbonization to prepare the colloidal carbon ball with grain size of 160 to 1,800 nm; performing alkali boiling on the residues to remove lignin; performing hydrolysis reaction on the residues and the concentrated sulfuric acid; filtering to obtain acid solution of the glucose; and performing in-situ polycondensation and carbonization to prepare the colloidal carbon ball with grain size of 180 to 2,000 nm. The method for preparing the colloidal carbon from the biomass is a green production route of sustainable development.

Description

technical field [0001] The invention relates to a preparation method of biomass-based colloidal carbon, in particular to a preparation method of hydrolyzing hemicellulose in straw with dilute acid, dissolving lignin in straw with dilute alkali, and hydrolyzing cellulose in straw with concentrated acid. A new method for material-based colloidal carbon and acid recycling. Background technique [0002] Colloidal carbon has good chemical stability, thermal stability, and excellent electrical and thermal conductivity. It is a carbon material with broad application prospects and has become a hot research topic for scientific researchers in various countries. Due to its unique physical and chemical properties, colloidal carbon can be used in catalyst supports, electrode materials, templating agents, drug slow-release agents, adsorbents and other fields. As a new type of green template, colloidal carbon is used to prepare the core / shell structure of metal nanoparticles / carbon spher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 王子忱王丽丽郭玉鹏朱燕超丁雪峰赵旭
Owner JILIN UNIV
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