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Mesoporous activated carbon and preparation process thereof

A technology of mesoporous activated carbon and sulfur-rich carbon, which is applied in the field of activated carbon, can solve the problems of difficulty in the preparation process of uniform dispersion, difficulty in washing, and low yield.

Inactive Publication Date: 2011-03-02
WUHAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two methods all use phenolic resin as raw material, and the raw material cost is extremely expensive
Due to the use of a large number of templates and activators, the production capacity of the equipment is low, the yield is not high, the washing is difficult, and the process is long, so the preparation cost is also very expensive.
In addition, due to the use of nano templates, uniform dispersion is also one of the difficulties in the preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A mesoporous activated carbon and a preparation method thereof. The technical scheme is: firstly, high-sulfur bituminous coal with a sulfur content of 0.5-3.7% and an ash content of 33.5-50% is used as raw material, KOH is used as an activator, and the mass ratio of soda coal is 1.0-2.0:1. Carry out carbon microcrystalline structure adjustment at 350-400°C for 3-5 hours, then preheat treatment at 600-700°C for 3-5 hours to prepare amorphous carbon preparation; The amorphous carbon preparation is activated at 850-950°C for 3.5-5 hours, and the activated charcoal is acid-washed, washed with water and dried to obtain mesoporous activated carbon.

[0014] The specific surface area of ​​the mesoporous activated carbon prepared in Example 1 is 670~1280m 2 / g, mesopore specific surface area is 282~850m 2 / g, the mesopore volume fraction is 40-66%, and the yield is 35-45%.

Embodiment 2

[0016] A mesoporous activated carbon and a preparation method thereof. The technical scheme is: firstly, high-sulfur bituminous coal with a sulfur content of 0.5-3.7% and an ash content of 33.5-50% is used as raw material, KOH is used as an activator, and the mass ratio of soda coal is 2.0-3.0:1. Carry out carbon microcrystalline structure adjustment at 350-400°C for 3-5 hours, then preheat treatment at 600-700°C for 3-5 hours to prepare amorphous carbon preparation; The amorphous carbon preparation is activated at 850-950°C for 3.5-5 hours, and the activated charcoal is acid-washed, washed with water and dried to obtain mesoporous activated carbon.

[0017] The specific surface area of ​​the mesoporous activated carbon prepared in Example 2 is 2230~2530m 2 / g, mesopore specific surface area is 1450~1950m 2 / g, the mesopore volume fraction is 65-77%, and the yield is 30-40%.

Embodiment 3

[0019] A mesoporous activated carbon and a preparation method thereof. The technical scheme is: firstly, high-sulfur bituminous coal with a sulfur content of 3.7-7% and an ash content of 12-33.5% is used as raw material, KOH is used as an activator, and the mass ratio of soda coal is 3.0-3.5:1. Adjust the microcrystalline structure of carbon at 300-350°C, the adjustment time is 2-3 hours, and then preheat treatment at 500-600°C for 2-3 hours to prepare amorphous carbon preparation; The amorphous carbon preparation is activated at 800-850°C for 2-3.5 hours, and the activated charcoal is acid-washed, washed with water and dried to obtain mesoporous activated carbon.

[0020] The specific surface area of ​​the mesoporous activated carbon prepared in Example 3 is 2530~2600m 2 / g, mesopore specific surface area is 1952~2350m 2 / g, the mesopore volume fraction is 79-90%, and the yield is 40-45%.

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Abstract

The invention relates to mesoporous activated carbon and a preparation method thereof. The technical proposal of the invention comprises the following steps: firstly, high sulfate bituminous coal or high sulfur content petroleum fluid coke are taken as raw materials, KOH is taken as an activating agent, the mass ratio of alkali to coal or the mass ratio of alkali to coke is 1.0-5.0:1, the adjustment of a carbon microcrystalline structure is performed in nitrogen atmosphere at a temperature of between 250 and 400 DEG C, the adjustment time is between 0.5 and 5 hours, and then the preheating treatment is performed for 1 to 5 hours at a temperature of between 400 and 700 DEG C to obtain an amorphous carbon stock; then the prepared amorphous carbon stock is subjected to activating treatment for 0.5 to 5 hours at a temperature of between 800 and 950 DEG C; and carbide after the activating treatment is acid-cleaned, water-scrubbed and dried to obtain the mesoporous activated carbon. The method has the characteristics of simple process, higher yield and productivity, low preparation cost and so on. Mesopores of the mesoporous activated carbon have large specific surface area, the mesopore area exceeds 60 percent of the mesoporous activated carbon, and the mesopore volume is high.

Description

technical field [0001] The invention belongs to the technical field of activated carbon. Specifically relates to a mesoporous activated carbon and a preparation method thereof. technical background [0002] The so-called primary sulfur-rich carbon here refers to a type of carbon resource with high sulfur content and rich in the organic structure of carbon in the form of natural organic sulfur, such as high-sulfur coal and high-sulfur petroleum coke. Activated carbon is a carbon product with rich pore structure, high specific surface area and amorphous carbon structure, which can be used as adsorbent and catalyst. Mesoporous activated carbon is activated carbon whose pore size distribution is mainly 2-50nm. [0003] Activated carbon can be prepared by physical activation or chemical activation using various carbon materials and biomass as raw materials. Among them, the physical activation method is to use water vapor or CO 2 The activation reaction is carried out at a tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08
Inventor 童仕唐查尔斯・Q・贾唐纳德・W・柯克
Owner WUHAN UNIV OF SCI & TECH
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