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Preparation method of high purity porous carbon

A porous carbon, high-purity technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of complex porous carbon process, environmental pollution, equipment corrosion, etc., to reduce adverse effects, reduce production costs, The effect of prolonging the life of the equipment

Inactive Publication Date: 2018-06-08
张家港博威新能源材料研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of high-purity porous carbon, which solves the problems of equipment corrosion and environmental pollution caused by using strong alkali as the activator in the prior art, and solves the problem of using acid solution to dissolve and remove the hard template Process complexity of preparing porous carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 100g of water-soluble phenolic resin, pour it into a three-necked flask, and place it in a water bath at 60°C, add 4.5g of hexamethylenetetramine and 135g of sodium carbonate, and stir mechanically for 30 minutes. Then raise the temperature of the water bath to 85°C, and continue heating and stirring for 1 h. The evenly stirred mixture was transferred to a beaker, and placed in an oven at 150°C for 12h. Then crush to 0.2-1mm, carbonize under nitrogen atmosphere, carbonization heating rate is 8°C / min, carbonization final temperature is 900°C, final temperature is kept for 1h, and naturally cooled to room temperature. The charcoal was taken out, washed repeatedly with 100°C deionized water, and suction filtered until neutral. The obtained product was dried in a vacuum oven at 120°C for 6 hours, and the specific surface area of ​​the prepared porous carbon was 1357m 2 / g, the total pore volume is 0.8cm 3 g -1 , Ash content is 0.3% (mass ratio).

Embodiment 2

[0028] Weigh 100g of water-soluble phenolic resin, pour it into a three-necked flask, and place it in a 60°C water bath, add 4.5g of hexamethylenetetramine and 135g of potassium carbonate, and stir mechanically for 30 minutes. Then raise the temperature of the water bath to 85°C, and continue heating and stirring for 1 h. The evenly stirred mixture was transferred to a beaker, and placed in a sealed oven at 150°C for 12h. Then crushed to 0.2-1mm, carbonized in a tube-type heating furnace, the carbonization heating rate is 8 ℃ / min, the final temperature of carbonization is 900 ℃, the final temperature is kept for 1 hour, naturally cooled to room temperature, and the whole process is protected by nitrogen. The charcoal was taken out, washed repeatedly with 100°C deionized water, and suction filtered until neutral. The obtained product was dried in a vacuum oven at 120°C for 6 hours, and the specific surface area of ​​the prepared porous carbon was 2054m 2 / g, the total pore ...

Embodiment 3

[0030] Weigh 100g of water-soluble phenolic resin, pour it into a three-necked flask, and place it in a water bath at 60°C, add 4.5g of hexamethylenetetramine and 135g of potassium acetate, and stir mechanically for 30 minutes. Then raise the temperature of the water bath to 85°C, and continue heating and stirring for 1 h. The evenly stirred mixture was transferred to a beaker and placed in an oven at 150°C for 12h. Then crushed to 0.2-1mm, carbonized in a tube-type heating furnace, the carbonization heating rate is 8 ℃ / min, the final temperature of carbonization is 900 ℃, the final temperature is kept for 1 hour, naturally cooled to room temperature, and the whole process is protected by nitrogen. The charcoal was taken out, washed repeatedly with 100°C deionized water, and suction filtered until neutral. The obtained product was dried in a vacuum oven at 120°C for 6 hours, and the specific surface area of ​​the prepared porous carbon was 1912m 2 / g, the total pore volume...

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Abstract

The invention discloses a preparation method of high purity porous carbon. The preparation method comprises the following steps: mixing alkaline metal salt easily dissolved in water with a water soluble high molecular material for a pre-reaction to obtain a mixture, wherein the high molecular material is prepared from one or more of resin, cellulose and a cellulose derivative; then crushing the mixture to particles, the grain sizes of which are 0.01-5mm; heating the particles to 600-1000 DEG C for 0.5-8h at a heating rate of 1-20 DEG C / min in an inert atmosphere, and carbonizing and activatingthe particles to prepare porous carbon; and finally, soaking the cooled porous carbon with a solution to dissolve residual alkaline metal salt, and washing the porous carbon for many times and dryingthe same to obtain the porous carbon. According to the preparation method of high purity porous carbon, the specific surface area of the prepared porous carbon reaches up to 1200-2100m<2> / g; the residual alkaline metal salt can be fully dissolved and removed only with water without processes such as pickling, the ash content is lower than 0.5%, the porous carbon is free of impurities such as ferrum and chlorine, the product quality is high, the service life of the equipment is prolonged favorably, and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to the fields of fine chemical industry and preparation of new energy materials, in particular to a preparation method of high-purity porous carbon. Background technique [0002] Porous carbon has the characteristics of rich pores, large specific surface area, high chemical and thermal stability, and good electrical conductivity. It has been widely used in gas adsorption, chromatographic separation, catalyst carrier, electrode material, etc. [0003] Different application fields have different requirements on the physical and chemical properties of porous carbon. In the fields of biomedicine and electrochemical storage, in addition to the well-developed pore structure, porous carbon also requires high purity. Especially for the electrochemical application of supercapacitors and battery electrode materials, in order to avoid performance degradation caused by side reactions, there are strict requirements on the content of impurities...

Claims

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Application Information

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IPC IPC(8): C01B32/348
Inventor 杨瑞甫余荣彬张金亮丁玉珍杨裕生徐乐乐
Owner 张家港博威新能源材料研究所有限公司
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