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Method for preparing layered nano carbon material by coal solvent heat treatment

A technology of layered nano and carbon materials, applied in the direction of nano carbon

Active Publication Date: 2020-07-07
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a method for preparing layered nano-carbon materials by coal solvent heat treatment, to solve one of the following problems existing in the preparation of layered nano-carbon materials by graphite intercalation oxidation:

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  • Method for preparing layered nano carbon material by coal solvent heat treatment
  • Method for preparing layered nano carbon material by coal solvent heat treatment
  • Method for preparing layered nano carbon material by coal solvent heat treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0065] Ash-free lignite is selected as the raw material, and the massive raw coal is crushed by mechanical crushing, and then sieved to control the particle size below 0.15mm. The pulverized raw coal was treated with 25 times deionized water in an ultrasonic cleaner (20 kHz) for 30 minutes, filtered and then dried in a drying machine at 110° C. until the water content was lower than 5%. Coal powder is mixed with benzyl alcohol-benzyl ether solvent to form coal slurry, which is then heated in a closed high-pressure reactor.

[0066] The molar ratio of the benzyl alcohol-benzyl ether solvent and the composition of the coal slurry are shown in Table 3. 400ml of coal slurry was injected into a 1L stainless steel reaction kettle, and the air was exhausted with nitrogen after sealing. The temperature of the coal slurry is raised to 380°C, the stirring rate is 300r / min, and the treatment time is 2.5h.

[0067]The solvent and low boilers are separated off after the liquefaction proce...

Embodiment 2

[0073] The ashless lignite is used as raw material, and the lump coal is crushed by mechanical crushing, and then sieved to control the particle size below 0.15mm. The pulverized raw coal was treated with 25 times deionized water in an ultrasonic cleaner (20kHz) for 30min, filtered and dried at 110°C until the moisture content was less than 5%; coal powder was mixed with benzyl alcohol-benzyl ether solvent to form coal slurry , and then heat-treated in a closed autoclave.

[0074] The molar ratio of benzyl alcohol-benzyl ether solvent was 1:1, and the mass ratio of solvent to coal powder was 4:1. 400ml of coal slurry was injected into a 1L stainless steel reactor, and the air was exhausted with nitrogen after sealing. The solvothermal treatment conditions are shown in Table 4.

[0075] The solvent and low boilers are separated off after the liquefaction process. Take 10 g of coal solvent heat treatment product, mix it with 140 ml of oxidizing agent (containing 23% nitric aci...

Embodiment 3

[0082] The ashless lignite is used as raw material, and the lump coal is crushed by mechanical crushing, and then sieved to control the particle size below 0.15mm. The pulverized raw coal was treated with 25 times deionized water in an ultrasonic cleaner (20kHz) for 30min, filtered and dried at 110°C until the moisture content was less than 5%. Coal powder is mixed with benzyl alcohol-benzyl ether solvent to form coal slurry, which is then heated in a closed autoclave.

[0083] The molar ratio of benzyl alcohol-benzyl ether solvent is 3:1, and the mass ratio of solvent to pulverized coal is 6:1. 400ml of coal slurry is injected into a 1L stainless steel reactor, and the air is exhausted with nitrogen after sealing.

[0084] The solvent and low boilers are separated off after the liquefaction process. Take 10g of coal solvothermal treatment product, mix with 140ml of oxidant, and the oxidation treatment conditions are shown in Table 5.

[0085] The oxidized product was washed...

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Abstract

The invention relates to a method for preparing a layered nano carbon material through coal solvent heat treatment, which belongs to the technical field of nano carbon materials, and solves the problem that the existing nano carbon material cannot meet the requirements of electrochemical energy storage parts, membrane materials and environment-friendly adsorption materials. The method comprises the following steps of 1, mixing pulverized coal and a benzyl alcohol-benzyl ether solvent in proportion to form a coal slurry solvent, 2, preparing a coal solvent heat treatment product by using a coalslurry solvent, 3, enabling the coal solvent heat treatment product to be subjected to pre-oxidation treatment through an oxidizing agent, and acquiring a pre-oxidation product, 4, dispersing the pre-oxidation product in ethanol, and adding ethylenediamine to form gel, and 5, carrying out further heat treatment on the molded product after gel drying, and cooling the solid after heat treatment toobtain the layered nano carbon material.The conversion from the primary fossil material coal to the layered nano carbon material is realized.

Description

technical field [0001] The invention relates to the technical field of nano-carbon materials, in particular to a method for preparing layered nano-carbon materials by coal solvent heat treatment. Background technique [0002] The continuous development of nanotechnology has gradually brought revolutionary technological innovations to some important fields, such as chip manufacturing, microelectronics, information technology, energy, biotechnology and medical treatment. There is a view that nanotechnology will bring about a new industrial revolution in the future. Carbon nanomaterials have always been an important field in the development of nanomaterials and technology. It is no exaggeration to say that the discovery of fullerenes and carbon nanotubes has opened the era of nanotechnology. On to a new climax. [0003] The research field of carbon nanomaterials is also expanding, including: graphene, fullerenes, carbon nanotubes, nanodiamonds, nanoparticles, nanofibers, nano...

Claims

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Application Information

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IPC IPC(8): C01B32/15
CPCC01B32/15
Inventor 李峰波袁国卿宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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