Preparation method of activated carbon with capability of efficiently adsorbing CO2

A CO2, activated carbon technology, applied in the field of activated carbon preparation, can solve the problems of small specific surface area, low nitrogen content and low yield of carbon materials, and achieve the effect of high adsorption performance

Active Publication Date: 2015-01-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above patents use nitrogen-containing reagents to treat finished activated carbon, or directly use nitrogen-containing polymers for carbonization and activation to synthesize nitrogen-containing porous carbon materials, there are generally disadvantages such as small specific surface area, low nitrogen content and low yield of carbon materials. , it is difficult to meet the requirements of efficient CO capture 2 requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Stir 0.5 mol melamine and 3.0 mol formaldehyde at 60°C for 90 minutes, then add 1.0 mol p-aminophenol, then reflux at 100°C for 4 hours, cool down to room temperature, then add 20 ml of methanol solution of 0.010 mol F127, and stir at room temperature After 5 hours, pour methanol into an open container at room temperature and volatilize naturally for 8 hours, then place it in an oven and cure it in sections at 100, 130, 170, 210 and 240 degrees Celsius for 6 hours at a heating rate of 0.5 degrees Celsius / min, respectively, to obtain Nitrogen prepolymer; carbonize the nitrogen-containing prepolymer at a rate of 0.5°C / min to 500°C for 4 hours under the protection of nitrogen to obtain carbonized material; mix the obtained carbonized material with KOH at a mass ratio of 1:3, Raise the temperature to 500°C at a rate of 2°C / min and activate for 2.0h. Finally, it is repeatedly washed with deionized water to neutrality, and the product is obtained after drying.

[0020] The s...

Embodiment 2

[0022] Stir 1.0 mol melamine and 5.0 mol formaldehyde at 70°C for 80 minutes, then add 1.0 mol p-aminophenol, then reflux at 120°C for 5 hours, cool down to room temperature, then add 80 ml of methanol solution of 0.005 mol F127, and stir at room temperature After 3 hours, pour methanol into an open container at room temperature and volatilize naturally for 10 hours, then place it in an oven and cure it in sections at 110, 140, 180, 220 and 250°C for 4 hours at a heating rate of 1.0°C / min to obtain nitrogen-containing Prepolymer; carbonize the nitrogen-containing prepolymer at a rate of 0.5°C / min to 600°C for 4 hours under the protection of nitrogen to obtain a carbonized material; mix the obtained carbonized material with KOH at a mass ratio of 1:1, and use The temperature was raised to 700°C at a rate of 5°C / min for 0.5h activation. Finally, it is repeatedly washed with deionized water to neutrality, and the product is obtained after drying.

[0023] The specific surface ar...

Embodiment 3

[0025] Stir 2.0 mol melamine and 12.0 mol formaldehyde at 80°C for 30 minutes, then add 1.0 mol p-aminophenol, then reflux at 60°C for 6 hours, cool down to room temperature, then add 160 ml of methanol solution of 0.020 mol F127, and stir at room temperature After 4 hours, pour methanol into an open container at room temperature and volatilize naturally for 8 hours, then place it in an oven and cure it in stages at 100, 150, 190, 230 and 260°C for 2 hours at a heating rate of 2.0°C / min to obtain nitrogen-containing Prepolymer; carbonize the nitrogen-containing prepolymer at a rate of 0.5°C / min to 700°C for 3 hours under the protection of nitrogen to obtain a carbonized material; mix the obtained carbonized material with KOH at a mass ratio of 1:2, and then The temperature was raised to 600°C at a rate of 3°C / min for 1.0h activation. Finally, it is repeatedly washed with deionized water to neutrality, and the product is obtained after drying.

[0026] The specific surface are...

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PUM

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Abstract

The invention provides a preparation method of activated carbon with capability of efficiently adsorbing CO2. The preparation method comprises the following steps: adding p-aminophenol after reaction of melamine and formaldehyde, carrying out reflux reaction for 4-8h, cooling until room temperature, then adding a methanol solution of F127 or P123, respectively segmenting at temperatures of 100-120 DEG C, 130-160 DEG C, 170-190 DEG C, 210-230 DEG C and 240-260 DEG C, respectively curing to obtain nitrogen-containing prepolymer, then carbonizing, mixing a carbonized material and KOH, activating for 0.5-2.0h, repeatedly washing by deionized water until neutrality finally, and drying to obtain the product. The activated carbon has the advantages of high specific surface area, high nitrogen content and high CO2 adsorption performance.

Description

technical field [0001] The invention relates to a preparation method of activated carbon, in particular to a method for efficiently adsorbing CO 2 The preparation method of activated carbon. Background technique [0002] With the worsening of environmental problems such as global warming, the combustion of traditional fossil fuels produces a large amount of greenhouse gas CO 2 Capture and storage technology has gradually attracted people's attention. In addition to the traditional liquid ammonia absorption method, membrane separation, low-temperature distillation and other methods, the activated carbon adsorption method has the advantages of low cost, high adsorption capacity, high selective adsorption, and excellent cycle regeneration stability. 2 Gas capture is one of the most promising technologies among many technologies. Although ordinary commercial activated carbon has a high specific surface area, developed microporous structure and large pore volume, it is directl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 李开喜万柳
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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