Preparation process of microball porous asphaltum group charring microball

A technology based on pitch and carbon microspheres, which is applied in special forms of dry distillation, petroleum industry, coke ovens, etc., can solve the problems of no practical value and concentration less than 1.0wt%, and achieve good sphericity, controllable ball diameter, and high yield. high rate effect

Inactive Publication Date: 2005-01-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But can only use very dilute asphalt tetrahydrofuran solution, the concentration is less than 1.0wt%, has no practical value

Method used

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  • Preparation process of microball porous asphaltum group charring microball

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 300ml of asphalt tetrahydrofuran solution with a concentration of 0.33g / ml to 2000ml of PVA glycerol solution with a concentration of 5g / L, heat it to 150°C at a rate of 2.0°C / min in a stirred tank at normal pressure, and keep the temperature until all THF is evaporated Take out, filter after cooling. The filter cake was dried at 110°C, heated in air at 5°C / min to 240°C, oxidized for 5 hours and then heated to 1000°C at 10°C / min under nitrogen protection, and carbonized for 15 minutes to obtain pitch-based carbon microspheres. The average spherical diameter is 32.0um, and the specific surface area is 403m 2 / g. Electron microscope photos such as figure 1 .

Embodiment 2

[0018] Add 300ml of asphalt tetrahydrofuran solution with a concentration of 0.33g / ml to 2000ml of PVA glycerol solution with a concentration of 10g / L, heat it to 150°C at a rate of 2.0°C / min in a stirred tank at normal pressure, and keep the temperature constant until all THF is evaporated Take out, filter after cooling. The filter cake was dried at 110°C, heated in air at 5°C / min to 240°C, oxidized for 5 hours and then heated to 1000°C at 10°C / min under nitrogen protection, and carbonized for 15 minutes to obtain pitch-based carbon microspheres. The average spherical diameter is 19.0um, and the specific surface area is 435m 2 / g.

Embodiment 3

[0020] Add 300ml of asphalt tetrahydrofuran solution with a concentration of 0.33g / ml to 2000ml of PVA glycerin solution with a concentration of 20g / L, heat it to 150°C at a rate of 2.0°C / min in a stirred tank at normal pressure, and keep the temperature constant until all THF is evaporated Take out, filter after cooling. The filter cake was dried at 110°C, heated in air at 5°C / min to 240°C, oxidized for 5 hours and then heated to 1000°C at 10°C / min under nitrogen protection, and carbonized for 15 minutes to obtain pitch-based carbon microspheres. The average spherical diameter is 16.0um, and the specific surface area is 485m 2 / g.

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Abstract

The invention is a multiporous pitch-based carbon microsphere preparing method, including the following steps: adding the pitch-containing organic solvent to glycerol solution containing surfactant, forming a uniform emulsion, then heating and volatilizing the solvent, filtering and drying to obtain pitch micropheres, raising the temperature to 200 deg.C-800 deg.C at an temperature ascending speed of 1 deg.C-5 deg.C/min, oxidizing for 0.5-5 hours, then raising temperature to 900 deg.C-1200 deg..C at a speed of 5 deg.C-10 deg.C/min under the protection of nitrogen gas, carbonizing for 0.5-1 hour, and finally obtaining pitch-based carbon microspheres.

Description

technical field [0001] The invention relates to a method for preparing carbon materials, in particular to a method for preparing porous pitch-based carbon microspheres. Background technique [0002] Carbon microspheres, such as porous pitch-based carbon microspheres, are widely used in the field of gas adsorption or energy storage, and have broad prospects in the application of supercapacitor electrode materials. [0003] US PATENT 3917806, JP PATENT 50-18879, Wang Kewen, Institute of Coal Chemical Industry, Chinese Academy of Sciences, etc. (Carbon Technology, 1996, (2): 5) reported a method for preparing spherical activated carbon with a diameter of about 2 mm using pitch. This method involves technologies such as mixing, crushing, and screening of curing agent, porogen, and asphalt, and the loss is large and the cost is high. Moreover, the diameter of the sphere is large, and the non-melting process is very long, and the diffusion process will be increased during applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C10B53/00
Inventor 吕永根杨常玲潘鼎
Owner DONGHUA UNIV
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