Mesoporous activated carbon material and preparation method and application thereof

A technology for activated carbon and raw materials, applied in the field of mesoporous activated carbon materials and their preparation, can solve the problems of cumbersome process, limited popularization and application, high activation yield, and achieve the effect of simplifying the preparation process, good application prospect and large specific surface area

Active Publication Date: 2020-08-07
SHANDONG OBO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, conventional chemical activation requires lower temperature and high activation yield. The specific surface area of ​​activated carbon is regulated by selecting a suitable activator and controlling the reaction conditions. Developed activated carbon is more difficult
Although the physical activation method is simple and the post-treatment is simple, it consumes a lot of energy, and it is more difficult to control the specific surface and pore size of activated carbon; the template method is mainly divided into soft template method and hard template method. The pore structure of activated carbon, but the block copolymer used in the soft template method is more expensive, and the prepared mesoporous carbon has a lower pore volume, which limits the popularization and application of this method; while the hard template method adopts specific pores. Structure materials (silicon dioxide, zeolite, etc.) are used as templates, and carbon precursors are filled in the template pores, and mesoporous carbons are obtained by carbonization and removal of templates, but the process is cumbersome and costly. Hydrofluoric acid used to remove silicon oxide templates Strong corrosiveness and volatility, easy to pollute the environment, difficult to achieve large-scale production
In addition, the activated carbon material prepared by the template method faces the same problem. The specific surface area of ​​activated carbon is not high, and with the increase of the mesoporosity of activated carbon, the specific surface area of ​​activated carbon will decrease significantly, and it is difficult to achieve the purpose of both.

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  • Mesoporous activated carbon material and preparation method and application thereof
  • Mesoporous activated carbon material and preparation method and application thereof
  • Mesoporous activated carbon material and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0073] The present invention also provides a kind of preparation method of mesoporous activated carbon, comprises the following steps:

[0074] A) After mixing the activated carbon raw material, the alkali-soluble nanoparticle template and the alkali activator, a mixed powder is obtained;

[0075] B) Under protective gas conditions, the mixed powder obtained in the above steps is activated to obtain a powder.

[0076] In the present invention, the selection, composition and structure of the raw materials in the above-mentioned preparation method, and the corresponding optimization principles, can preferably correspond to the selection, composition and structure of the aforementioned mesoporous activated carbon raw materials, and the corresponding optimization principles, and will not be repeated here. Let me repeat them one by one.

[0077] In the invention, firstly, the active carbon raw material, the alkali-soluble nano particle template agent and the alkali activator are m...

Embodiment 1

[0122] Weigh 100g of petroleum coke and pulverize it until the particle size D50 is 10 μm with a jet mill, and pre-disperse the pulverized material and 200 g of nano-silica with a particle size of about 5 nm by ball milling, and mix the pre-dispersion mixture and the activator potassium hydroxide according to 1 : 2 mass ratio for mixing, after mixing evenly, heat up to 600°C in an activation furnace with nitrogen protection for 3 hours of activation treatment, cool to room temperature after the reaction, and use dilute hydrochloric acid to remove the activator and impurities in the obtained carbon material, to remove Washing with ionic water to neutrality, drying after washing to obtain petroleum coke-based mesoporous activated carbon.

[0123] The petroleum coke-based mesoporous activated carbon prepared in Example 1 of the present invention was characterized.

[0124] see figure 1 , figure 1 SEM scanning electron micrograph of the mesoporous activated carbon prepared for E...

Embodiment 2

[0129] Weigh 100g of coal tar pitch with a particle size D50 of 30μm, pre-disperse the pulverized material and 500g of nano-silica with a particle size of about 20nm by ball milling, then heat to 130°C until the mixture becomes a slurry material, and stir for 3 hours until mixed Uniformly, carbonize the material at 500°C for 1 h under a nitrogen atmosphere, use a jet mill to crush the carbide to a particle size D50 of 30 μm, mix the pulverized material and the activator sodium hydroxide according to a mass ratio of 1:3, and mix After uniformity, heat up to 700°C in an activation furnace protected by nitrogen for 2 hours of activation treatment. After the reaction, cool to room temperature, use dilute hydrochloric acid to remove the activator and impurities in the obtained carbon material, wash with deionized water until neutral, and after washing Dry to obtain petroleum coke-based mesoporous activated carbon.

[0130] The petroleum coke-based mesoporous activated carbon prepar...

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Abstract

The invention provides mesoporous activated carbon. The mesoporous activated carbon is obtained by activating an activated carbon raw material through a template method and an alkali activation method. An activated carbon material is prepared by using a combination of the template method and the chemical alkali activation method; a template agent is added in the process of preparing the activatedcarbon through chemical activation; a carbon source generates a large number of holes in alkali-activated pore-forming process, and an alkali activator can etch and remove the template agent in the high-temperature pore-forming process so as to allow a large number of nanometer pore diameters similar to the particle size of the template agent to be generated; and a part of mesopores become macropores due to the etching effect of alkali. According to the invention, the specific surface area of the activated carbon can be adjusted according to the proportion of the activator, an independent activating process is not needed, complex technological processes are reduced, the template does not need to be removed through hydrofluoric acid, environmental pollution is reduced, and production is facilitated. The mesoporous activated carbon provided by the invention has developed mesopores and larger specific surface area; preparation process is simplified; cost is reduced; environmental protection is realized; and the mesoporous activated carbon is more suitable for popularization and application in industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of mesoporous activated carbon materials, and in particular relates to a mesoporous activated carbon material and its preparation method and application. Background technique [0002] Activated carbon is black powder or block, granular, honeycomb amorphous carbon, and there are also regularly arranged crystalline carbon. In addition to carbon elements, activated carbon also contains two types of admixtures: one is chemically combined elements, mainly oxygen and hydrogen, these elements are left in the carbon due to incomplete carbonization, or in the activation process, foreign Non-carbon elements are chemically combined with the surface of activated carbon; another type of admixture is ash, which is the inorganic part of activated carbon, which is easy to cause secondary pollution. The activated carbon material has a porous structure, a large specific surface area, and has good adsorption capacity for gase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/318
CPCC01B32/348C01B32/318C01P2006/12C01P2006/17C01P2004/03C01P2002/80
Inventor 张聪赵永彬马立军
Owner SHANDONG OBO NEW MATERIAL CO LTD
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