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Preparation method of activated carbon fiber

A technology of activated carbon fiber and activated carbon fiber, applied in fiber treatment, plant fiber, fiber chemical characteristics, etc., can solve the problems of cumbersome preparation process, strict equipment requirements, equipment corrosion, etc., and achieve simplified process steps, developed voids, and strong adsorption Effect

Inactive Publication Date: 2019-07-05
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method takes a long time, and it needs to be fermented for 4-6 days in the biological pretreatment stage, and the use of high-temperature molten strong alkali is also very serious for equipment corrosion
Although the specific surface area of ​​activated carbon fibers prepared by this technology can reach 2000m 2 / g, but the preparation process is cumbersome and requires strict equipment

Method used

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  • Preparation method of activated carbon fiber
  • Preparation method of activated carbon fiber
  • Preparation method of activated carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of activated carbon fiber, concrete steps are as follows:

[0032] Soak the cotton linters in 5% ammonium dihydrogen phosphate solution, take it out and dry it after 1 hour; then put the dried cotton linters into a tube furnace, and carry out carbonization activation under the protection of nitrogen, 425 ℃ carbonization for 60 minutes; then the temperature was raised to 900 ℃ at a rate of 8 ℃ / min, and activated by passing water vapor for 30 minutes; after the product was naturally cooled, it was taken out, put into a vacuum drying oven, and dried at 60 ℃ for 12 hours to obtain activated carbon fibers.

[0033] The electron microscope picture of the activated carbon fiber that the present embodiment gains is as figure 1 shown. It can be seen from the figure that the surface of the prepared activated carbon fibers has different degrees of unevenness, which shows that the activation is complete. The unevenness is formed by water vapor etching the amorphou...

Embodiment 2

[0043] The preparation of activated carbon fiber, concrete steps are as follows:

[0044] Soak the cotton linters in 5% ammonium dihydrogen phosphate solution, take it out and dry it after 1 hour; then put the dried cotton linters into a tube furnace, and carry out carbonization activation under the protection of nitrogen, 425 ℃ carbonization for 60 minutes; then the temperature was raised to 900 ℃ at a rate of 10 ℃ / min, and water vapor was introduced to activate for 40 minutes; after the product was naturally cooled, it was taken out, put into a vacuum drying oven, and dried at 60 ℃ for 12 hours to obtain activated carbon fibers.

[0045] Adopt aperture specific area analyzer (SA 3100), calculate according to BET method, the specific surface area of ​​the activated carbon fiber obtained in the present embodiment is 1512.05m 2 / g.

Embodiment 3

[0047] The preparation of activated carbon fiber, concrete steps are as follows:

[0048] Soak the cotton linters in 5% potassium dihydrogen phosphate solution, take it out and dry it after 1 hour; then put the dried cotton linters into a tube furnace, and carry out carbonization activation under the protection of nitrogen, 425 ℃ carbonization for 60 minutes; then raise the temperature to 900 ℃ at a rate of 10 ℃ / min, pass through water vapor to activate for 50 minutes; take out the product after natural cooling, put it in a vacuum drying oven, and dry it at 60 ℃ for 12 hours to obtain activated carbon fibers.

[0049] Adopt aperture specific area analyzer (SA 3100), calculate according to BET method, the specific surface area of ​​the activated carbon fiber obtained in the present embodiment is 1524.09m 2 / g.

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Abstract

The invention provides a preparation method of an activated carbon fiber. The method comprises the steps that cotton linters are immersed in a phosphate solution, dried, carbonized under the protection of nitrogen and then activated by water vapor to obtain the activated carbon fiber. According to the method, the cotton linters are adopted as raw materials, there is no need to purify or biologically process the raw materials, the preparation process is simple and quick, the production cost is low, and the obtained activated carbon fiber has a large specific surface area and can be used for wastewater adsorption and reused.

Description

technical field [0001] The invention relates to a method for preparing activated carbon fibers, which belongs to the technical field of activated carbon fibers. [0002] technical background [0003] Activated carbon fiber is a very promising high-efficiency adsorption material, which has a large specific surface area and a large number of interconnected and complex microporous structures inside. Not only high temperature resistance, corrosion resistance, but also excellent performances such as electrical conductivity, environmental coordination, small pollution and strong regeneration ability, no matter whether the pollutants are trace or high concentration, activated carbon fibers can be used for adsorption treatment to achieve satisfactory results, in many Activated carbon can be replaced in the field. [0004] Cotton linters are very short fibers peeled off from the surface of ginned cotton seeds, and are important raw materials for extracting pure cotton cellulose. my ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16D06M11/71D06M101/06
CPCD01F9/16D06M11/71D06M2101/06
Inventor 冯菊红胡学雷朱艳云田发科张友平
Owner WUHAN INSTITUTE OF TECHNOLOGY
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