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Preparation method of porous material with high specific surface area and application thereof

A high specific surface area, porous carbon technology, applied in the field of materials, can solve the problems of pollution, equipment corrosion environment, difficulty in obtaining high specific surface area porous carbon materials, etc. Effect

Pending Publication Date: 2021-06-22
LIAONING AOYIDA ADVANCED MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these technologies for obtaining porous carbon with high specific surface area use a large amount of potassium hydroxide, and post-treatment requires pickling and water washing, and there are problems such as equipment corrosion and environmental pollution.
The physical activation method is simple, clean and sustainable, but conventional physical activation is difficult to obtain porous carbon materials with high specific surface area

Method used

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  • Preparation method of porous material with high specific surface area and application thereof
  • Preparation method of porous material with high specific surface area and application thereof
  • Preparation method of porous material with high specific surface area and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Dissolve 1.5g of heavy organic components of coal liquefaction residue in 50mL of 1,2-dichloroethane at room temperature, then add 1.5g of dimethoxymethane and 6.5g of anhydrous ferric chloride to form a homogeneous The mixture was placed in a 250mL three-necked flask, stirred and reacted at 80°C under a nitrogen atmosphere for 2h, 4h, 8h, 16h and 24h to obtain product A; the obtained product A was washed 3 times with ethanol, and dried in a vacuum oven at 80°C for 24h. The obtained products B were labeled as CLR-jl-2h, CLR-jl-4h, CLR-jl-8h, CLR-jl-16h and CLR-jl-24h, respectively.

Embodiment 2

[0054] At room temperature, dissolve 1.5g of deashed bituminous coal in 50mL of 1,2-dichloroethane, then add 1.5g of dimethoxymethane and 6.5g of anhydrous ferric chloride to form a homogeneous mixture in a 250mL three-port In the flask, stirred and reacted at 80°C under a nitrogen atmosphere for 24h to obtain product C; the obtained product C was washed with ethanol three times, dried in a vacuum oven at 80°C for 24h, and the porous polymer D was obtained as BC-jl-24h.

Embodiment 3

[0056] Get the product CLR-jl-24h 1.0g after the cross-linking reaction 24h, it is placed in the tube furnace, in 50mL min -1 Ar atmosphere, at 5°C min -1 The heating rate is raised to 900 ° C, and the switching flow rate is 100 mL min -1 CO 2 , followed by activation for 2h, 3h, 4h and 5h, after completion, switch to 50mL min -1 Ar atmosphere, cooled to room temperature, that is to obtain porous carbon materials, marked as CLR-jl-24h-900-2h, CLR-jl-24h-900-3h, CLR-jl-24h-900-4h and CLR-jl- 24h-900-5h, the main properties of this series of porous carbon materials are shown in Table 1.

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Abstract

The invention discloses a preparation method of a porous carbon material with a high specific surface area by taking coal or a heavy organic matter as a raw material through chemical crosslinking and physical activation, and belongs to the technical field of materials. The method comprises the following steps: carrying out swelling treatment on coal or heavy organic matters by using a solvent, adding a cross-linking agent, reacting under the catalysis of Lewis acid to obtain a product A, washing by using the solvent, filtering, and drying to obtain a porous polymer; and activating the porous polymer in the atmosphere of carbon dioxide, water vapor, air or a mixture of the carbon dioxide, the water vapor and the air to obtain the porous carbon material. The porous polymer prepared by the invention has excellent thermal stability and can be applied to the field of heat-resistant materials; the specific surface area of the prepared porous carbon material can reach 2200 m <2>g<-1 >, and the porous carbon material can be applied to the fields of supercapacitor electrode materials, adsorption materials, catalyst carriers and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method and application for preparing a porous material with a high specific surface area by using coal or heavy organic matter through chemical crosslinking and physical activation. Background technique [0002] Due to the advantages of high specific surface area, excellent physical and chemical stability, and well-developed pore structure, porous carbon materials have extensive and important applications in the fields of adsorption, separation, catalysis, petrochemicals, and medical care. It is an important product that is essential to the process, so it has attracted extensive attention from the industry. [0003] So far, the methods for preparing porous carbon materials mainly include activation method and template method. Among them, the template method is difficult to play a role in large-scale applications due to the shortcomings of long time-consuming, cum...

Claims

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Application Information

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IPC IPC(8): C01B32/33C01B32/342C01B32/318H01G11/26H01G11/32H01G11/86
CPCC01B32/33C01B32/342C01B32/318H01G11/26H01G11/32H01G11/86Y02E60/13
Inventor 周颖黄鲜安王春雷李官书
Owner LIAONING AOYIDA ADVANCED MATERIAL
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