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Method for preparing active carbon with developed mesopores by using coal

A kind of activated carbon, developed technology, applied in the field of coal-based activated carbon preparation, can solve the problem of low mesoporosity, achieve the effect of increasing mesoporosity, improving production efficiency, and reducing costs

Inactive Publication Date: 2018-08-24
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method of using coal to prepare activated carbon with well-developed mesopores, so as to solve the problem of low mesoporosity of coal-based briquette activated carbon prepared from coal in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Coal A, which accounts for 60wt% of the total amount of raw coal, and 40wt% coal B are ground into pulverized coal less than 200 mesh in a mill, and sent to a briquetting machine with a working pressure of 26MP for briquetting. After primary crushing and secondary Screening after crushing;

[0039] Qualified pellets (1mm ~ 8mm) are subjected to oxidation treatment and carbonization treatment in sequence, and the oxidation treatment conditions are: oxidize the pellets for 3 hours at 230-250°C with air as the oxidant in an electrically heated external heating converter Treatment; the carbonization treatment conditions are as follows: carbonize the material for 2.5 hours at 500-550°C in an electric heating external heating converter, and control the oxygen concentration in the furnace atmosphere below 5vol%.

[0040] After cooling, the carbonized material obtained is soaked in 5% sodium nitrate solution for 2 hours, dried (the nitrate content is about 0.6%), and then sent ...

Embodiment 2

[0042] Coal A, which accounts for 55wt% of the total amount of raw coal, and 45wt% coal B are ground into pulverized coal of less than 200 mesh in a mill, and sent to a briquetting machine with a working pressure of 26MP to form briquettes. After primary crushing and secondary Screening after crushing;

[0043] Qualified pellets (3mm ~ 10mm) are subjected to oxidation treatment and carbonization treatment in sequence, and the oxidation treatment conditions are: oxidize the pellets for 3 hours at 230-250°C with air as the oxidant in an electrically heated external heating converter Treatment; the carbonization treatment conditions are as follows: carbonize the material for 2.5 hours at 500-550°C in an electric heating external heating converter, and control the oxygen concentration in the furnace atmosphere below 5vol%.

[0044] After cooling, the carbonized material obtained is soaked in 10% potassium nitrate solution for 2 hours, dried (the nitrate content is about 0.96%), an...

Embodiment 3

[0046] Coal A and 50wt% coal B, which account for 50wt% of the total amount of raw coal, are ground into pulverized coal of less than 200 mesh in a mill, and sent to a briquetting machine with a working pressure of 26MP to form briquettes. After primary crushing and secondary Screening after crushing;

[0047] Qualified pellets (3mm ~ 8mm) are subjected to oxidation treatment and carbonization treatment in sequence. The oxidation treatment conditions are: oxidize the pellets for 3 hours at 230-250°C with air as the oxidant in an electrically heated external heating converter Treatment; the carbonization treatment conditions are as follows: carbonize the material for 2.5 hours at 500-550°C in an electric heating external heating converter, and control the oxygen concentration in the furnace atmosphere below 5vol%.

[0048] After cooling, the obtained carbonized material is soaked in a solution of 15% calcium nitrate and magnesium nitrate at a mass concentration of 1:1 for 2 hou...

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Abstract

The invention discloses a method for preparing active carbon with developed mesopores by using coal. The method comprises: preparing coal by using weakly caking coal and gas coal as raw materials, andcrushing to obtain raw material coal; carrying out briquetting molding on the raw material coal, and granulating to obtain coal particles; carrying out oxidization treatment and carbonization treatment on the coal particles to obtain a carbonized material; and immersing the carbonized material by using a nitrate solution, drying the immersed carbonized material, and carrying out activation treatment to obtain active carbon. According to the present invention, the active carbon is prepared by using a certain amount of the weakly caking coal and the gas coal, such that the properties and the matching effect of the raw materials are well combined; compared to the traditional coal-based briquetting active carbon, the active carbon product of the present invention has the effectively-improvedmesoporosity under the action of the immersing with the nitrate; and with the method, the problem that the mesoporosity is low due to the complete application of coal as the raw material in the production of the traditional coal-based briquetting active carbon is solved.

Description

technical field [0001] The invention belongs to the field of coal-based activated carbon preparation, in particular to a method for preparing activated carbon with well-developed mesopores by using coal. Background technique [0002] Because activated carbon has a highly developed pore structure and a large specific surface area, its applications range from decolorization and deodorization of food and medicine, gas masks, to large-scale use in solvent refining and recovery, advanced water treatment, flue gas Purification, blood purification, etc., put forward new and higher requirements for the adsorption performance of activated carbon. [0003] Activated carbon is divided according to its form, including shaped activated carbon and powdered activated carbon. Compared with shaped activated carbon, powdered activated carbon has greater adsorption (iodine value and / or methylene blue value), but due to its powdery form, it is limited. application field. [0004] China is ric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/33C01B32/348C01B32/384
CPCC01P2006/17C01P2006/80C01P2006/90
Inventor 王福平王成王刚吴宪平申明祺郭晓莉庞旖旎徐晶晶王瑞周志超侯伟
Owner CHNA ENERGY INVESTMENT CORP LTD
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