Method for preparing activated carbon by using waste wool

A technology for preparing activated carbon and wool, applied in the fields of material chemical industry and environmental science, can solve the problems of low added value, low utilization rate, secondary pollution, etc., and achieve high added value of products, large market value and social benefits, and avoid pollution. Effect

Inactive Publication Date: 2012-07-25
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods all have problems such as low utilization rate, low added value and secondary pollution, and cannot make full use of waste wool resources.
However, there are no relevant patents and reports on processing wool into activated carbon with a special tubular structure.

Method used

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  • Method for preparing activated carbon by using waste wool
  • Method for preparing activated carbon by using waste wool
  • Method for preparing activated carbon by using waste wool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Wash the wool with water several times to remove the impurities attached to the wool, and cut it into short hairs with a length of less than 5 mm; and place the dried wool raw material in a tubular reactor, under nitrogen protection at 10 ° C · min -1 The speed was heated to the set temperature of 260 °C, and then kept for 1 h. After it was cooled to room temperature, it was taken out and ground to obtain a carbonized sample of wool. This initial charcoal is added to K according to the mass ratio of 1:4 2 CO 3 The powder is stirred evenly and placed in a tubular reactor for high temperature activation treatment. Heating rate 10℃·min -1 , to the set temperature of 400 ℃, then keep it for 1 h, and then take it out after it cools to room temperature. Wash with distilled water until the pH value of the filtrate is 6.5 to 7, and after drying, the activated carbon with wool as raw material is obtained.

[0022] figure 2 a is the scanning electron microscope images of wo...

Embodiment 2

[0024] When the wool raw material is pyrolyzed, the temperature is raised to the set temperature of 260°C, and then kept for 0.5h. 2 CO 3 The powder is activated and heated to a set temperature of 500° C. and then kept for 90 minutes. The remaining steps and parameters are the same as those in Example 1, and activated carbon with wool as raw material is obtained.

[0025] figure 2 b is the scanning electron microscope image of wool activated carbon prepared by the method described in this example under different magnifications. The electron microscope model used is JEOL NEOSCOPE (JCM-5000). From the figure, we can clearly see that the method of this embodiment is adopted. Prepared activated carbon: A tube was formed in the activated carbon sample, the tube wall was uniform, and a large number of macropores and mesopores were formed on the surface of the tube. According to the determination of its BET specific surface area is 346m 2 ·g -1 , with an average pore volume of 0...

Embodiment 3

[0027] When the wool raw material is pyrolyzed, the temperature is raised to the set temperature of 260°C, and then kept for 0.8h. 2 CO 3 The powder is activated and heated to a set temperature of 600° C. and then kept for 60 minutes. The remaining steps and parameters are the same as those in Example 1 to obtain activated carbon with wool as raw material.

[0028] figure 2 c is the scanning electron microscope image of wool activated carbon prepared by the method described in this example under different magnifications. The electron microscope model used is JEOL NEOSCOPE (JCM-5000). From the figure, we can clearly see that the method of this embodiment is adopted. Prepared activated carbon: A tube was formed in the activated carbon sample, and the tube wall was thinner; however, a "big hole" was "exploded" in the middle of the tube due to the high temperature. According to the determination of its BET specific surface area is 426m 2 ·g -1 , with an average pore volume of...

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Abstract

The invention discloses a method for preparing activated carbon by using waste wool, which specifically comprises the following steps of: firstly, cutting waste wool into pieces, heating to 260 DEG C in a tubular reactor under the protection of nitrogen, pyrolyzing for 30min to 60min to form initial carbon with a tubular structure; secondly, evenly mixing the initial carbon and a powdered activator together according to a certain mass ratio, activating the mixture in the tubular reactor at high temperature, heating to 400-700DEG C, and then preserving the temperature for 30-90min, and coolingto the room temperature and taking out; and finally cleaning and drying to obtain finished activated carbon made from waste wool. By the method for preparing activated carbon provided by the invention, the pollution caused by the waste wool is avoided; and simultaneously, based on the special structure of wool, the prepared activated carbon is of a tubular structure and has special performances and purposes; and the pollution is not produced in the whole production method basically, so the production method meets the requirements of clean production and recycling economy, and has great marketvalue and social benefit.

Description

technical field [0001] The invention belongs to the fields of material chemical industry and environmental science, and relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon by using waste wool. Background technique [0002] my country is rich in wool resources. It is the world's largest sheep breeding country, the second largest wool producer, and the largest wool importer. It is also a major wool textile producer. Due to the limitation of wool quality, feeding management and textile technology, a large amount of wool short fibers and crude fibers are discarded every year; at the same time, many worn wool sweaters are discarded, which not only causes a waste of resources, but also pollutes the environment. Therefore, it is of great significance to study the recycling and utilization of waste wool fibers and their methods for the effective utilization and protection of natural resources and the realization of sustainable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/12B09B3/00
Inventor 陈悟王训阶王敏李玉广祝荻崔永明蔡映杰
Owner WUHAN TEXTILE UNIV
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