Preparation method of foam carbon based on hydrophobic component in coal

A technology of sparse and medium-sized and foamed carbon, which is applied in the field of foamed carbon preparation based on sparse and medium-sized components in coal, can solve the problems of harsh technology and equipment, and achieves low apparent density, simple source of raw materials, and foam. The effect of rich pore structure

Inactive Publication Date: 2015-01-28
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reported process of preparing foamed carbon often requires high temperature and high pressure, or adding foaming agent, or adding templates and other artificial foaming processes. Although mesophase pitch can be used as raw material to prepare foamed carbon with better performance, it is difficult to prepare foamed carbon from pitch. Mesophase pitch has strict requirements on technology and equipment

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of the foamed carbon based on the sparse medium component in coal of the present invention comprises the preparation of the sparse medium group, and the preparation steps of the described sparse medium group are as follows:

[0021] ①Place the coal sample with a particle size of 10-300 mesh in the extractor, then add a mixed solvent in an amount of 20-300 milliliters of mixed solvent per gram of coal sample, and the mixed solvent is solvent A and solvent B in a volume ratio of 1: Mixture prepared from 0.2 to 1:2; Stir at room temperature for 10-300 minutes, the extraction process is completed, and the extracted solid-liquid mixture is obtained;

[0022] ② Carry out solid-liquid separation to the extraction solid-liquid mixture extracted in step ①, and obtain extract and raffinate respectively after solid-liquid separation;

[0023] ③Process the extract in step ②, put the extract into the stripper, then add the stripper to the stripper, the amount ...

Embodiment 1

[0033] Select carbon content C daf 86.50% of a certain coal sample was crushed, and the coal sample was separated into four components according to the whole group separation process of coal, and the sparse middle component was collected for later use.

[0034] 1. Soxhlet extraction of the sparse mesoplasmic group with methanol solution at 65°C for 20 hours to extract the small molecular substances;

[0035] 2. Wash the extracted mesoplasmic group with water for 2 hours at room temperature;

[0036] 3. Dry the sparse medium group for 20 hours in an air medium with a temperature of 110°C, a relative humidity of 20%, and a flow rate of 2m / s;

[0037] 4. Grind the dried mesoplasmic group to 200 mesh and press it into a cylinder with a thickness of about 1 mm under a pressure of 5 MPa;

[0038] 5. After the sample is pressed, it is placed at the bottom of the crucible and placed in a certain position in the tube furnace. In the inert component N 2 In the process, heat up to 450...

Embodiment 2

[0042] Select carbon content C daf 85.0% of a certain coal sample was crushed, and the coal sample was separated into four components according to the whole group separation process of coal, and the sparse middle component was collected for later use.

[0043] 1. Perform Soxhlet extraction with chloroform solution at 61°C for 2 hours to extract the small molecules in the sparse mesoplasmic group;

[0044] 2. Wash the extracted mesoplasmic group with ethanol for 4 hours at room temperature;

[0045] 3. Dry the mesoplasmic group for 15 hours in an air medium with a temperature of 80° C., a relative humidity of 30%, and a flow rate of 1 m / s.

[0046] 4. Grind the dried mesoplasmic group to 100 mesh and press it into a cylinder with a thickness of about 2 mm under a pressure of 8 MPa;

[0047] 5. The sample is placed at the bottom of the crucible and placed in a certain position in the tube furnace. In the inert component N 2 In the process, the temperature was raised to 550°C at...

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Abstract

The invention discloses a preparation method of foam carbon based on a hydrophobic component in coal, belonging to the preparation method of foam carbon. The preparation method comprises the following steps: (1) taking the hydrophobic component separated from a coal component as a raw material; (2) putting the raw material into a solvent A for extraction, and regulating molecular components; (3) washing the hydrophobic component obtained by extracting by use of a solvent B at the room temperature; (4) drying the hydrophobic component in an air medium with a certain temperature, relative humidity and flow velocity, so that a foam structure with a film foam wall is further formed in the hydrophobic component; (5) grinding the dried hydrophobic component, and pressing to form a tablet; (6), putting the sample subjected to the tabletting into a high-temperature carbonization furnace for heating in an inert atmosphere to obtain semi-foam carbon, and performing carbonation and heating, naturally cooling in the presence of inert gas, and cooling to the room temperature to obtain the foam carbon. The preparation method has the advantages that the raw material source is simple and low in cost, the method is simple and does not need sealed pressuring equipment, the foam carbon is rich in cellular structure, and very low in volume density and apparent density.

Description

technical field [0001] The invention relates to a preparation method of foamed charcoal, in particular to a preparation method of foamed charcoal based on the sparse medium component in coal. Background technique [0002] Foam carbon is a three-dimensional light-weight network structure composed of cells and cell walls obtained through foaming, solidification, carbonization and graphitization procedures, and can be appropriately modified according to the application. Carbon materials to enhance a specific performance. Foamed carbon is mainly prepared from organic polymers, pitch, mesophase pitch, coal and coal series, and different raw materials determine its different properties. The reported process of preparing foamed carbon often requires high temperature and high pressure, or adding foaming agent, or adding templates and other artificial foaming processes. Although mesophase pitch can be used as raw material to prepare foamed carbon with better performance, it is diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 秦志宏单良陈航马玲玲邓兵
Owner CHINA UNIV OF MINING & TECH
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