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Preparation method of activated wood carbon fiber

A carbon fiber and active technology, applied in the field of activated carbon fiber preparation, can solve the problems of complicated process and high production cost, and achieve the effects of simplified process steps, developed pores and strong adsorption effect.

Inactive Publication Date: 2019-05-24
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technology is cumbersome and the production cost is high

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0032] Immerse the wood in 5% ammonium dihydrogen phosphate solution, take it out and dry it after 60 minutes; then put the dried cotton linters into a tube furnace, carbonize and activate it under the protection of nitrogen, and carbonize at 425°C for 60 minutes; Then the temperature was raised to 900°C at a rate of 8°C / min, and activated by passing water vapor for 50 minutes; after the product was naturally cooled, it was taken out, put into a vacuum drying oven, and dried at 60°C for 12 hours to obtain activated woody carbon fibers.

[0033] The nitrogen adsorption-desorption isotherm of the activated carbon fiber that makes in the present embodiment is as follows figure 2 shown by figure 2 It can be seen that the prepared activated carbon fiber has a large number of pores. In the low relative pressure area, due to the filling of the pores, the gas adsorption capacity will increase rapidly...

Embodiment 2

[0038] Immerse the wood in 5% ammonium dihydrogen phosphate solution, take it out and dry it after 60 minutes; then put the dried wood into a tube furnace, and carry out carbonization activation under the protection of nitrogen, and carbonize at 425°C for 60 minutes; then Raise the temperature to 900°C at a rate of 10°C / min, pass in water vapor for activation for 40 minutes; take out the product after natural cooling, put it in a vacuum drying oven, and dry at 60°C for 12 hours to obtain activated woody carbon fibers.

[0039] Further, the activated wood carbon fiber obtained in the present embodiment is tested for adsorption performance, and the specific experimental method and calculation method are the same as in Example 1, and the C 0 =1000mg / L, C e =135.9mg / L, after calculation, the removal rate reaches 86.41%, it can be seen that the active woody carbon fiber has a strong adsorption effect on Congo red.

Embodiment 3

[0041] Immerse the wood in 5% potassium dihydrogen phosphate solution, take it out and dry it after 60 minutes; then put the dried wood into a tube furnace, carbonize and activate it under the protection of nitrogen, and carbonize it at 425°C for 60 minutes; then Raise the temperature to 800°C at a rate of 10°C / min, pass in water vapor for activation for 30 minutes; take out the product after natural cooling, put it in a vacuum drying oven, and dry at 60°C for 12 hours to obtain activated woody carbon fibers.

[0042] Further, the activated wood carbon fiber obtained in the present embodiment is tested for adsorption performance, and the specific experimental method and calculation method are the same as in Example 1, and the C 0 =1000mg / L, C e =281.9mg / L, after calculation, the removal rate reaches 78.11%, it can be seen that the active woody carbon fiber has a strong adsorption effect on Congo red.

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Abstract

The invention provides a preparation method of an activated wood carbon fiber. The preparation method of the activated wood carbon fiber comprises immersing wood into phosphate solution, then drying the immersed wood, and performing carbonization under protection of nitrogen and then activation with vapor to obtain the activated carbon fiber. By taking word processing residues as the raw materialand directly performing carbonization and activation directly without processes of extraction of cellulose or lignin to obtain the activated carbon fiber, the preparation method of the activated woodcarbon fiber is simple and rapid in preparation processes and low in production cost; the prepared activated carbon fiber is large in specific surface area and applicable to wastewater adsorption.

Description

technical field [0001] The invention relates to a preparation method of activated wood carbon fiber, which belongs to the technical field of activated carbon fiber preparation. technical background [0002] Activated carbon fiber is a new type of high-efficiency and multi-functional adsorption material developed in the 1970s. As an adsorbent, it has the following characteristics: large adsorption capacity, fast speed, high degree of purification, can be regenerated and reused, and will not cause new characteristics of pollution. [0003] At present, the raw materials of activated carbon fibers mainly depend on non-renewable fossil resources, so it is necessary to carry out research on the preparation of activated carbon fibers from biomass raw materials. Chinese patents CN 102719935A and CN 103290526A report methods for preparing activated carbon fibers using wood flour. But both of these methods require pretreatment of wood powder: firstly prepare wood powder liquefied pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16
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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