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A system and method for catalyzing graphitization of coal using solar energy concentration

A technology of solar concentration and graphitization, which is applied in solar heating systems, solar thermal energy, solar thermal power generation, etc., can solve the problems of high cost, achieve the effects of reducing production costs, realizing clean and efficient utilization, and simple raw material processing technology

Active Publication Date: 2019-09-17
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, catalytic graphitization is mainly carried out in electric furnaces, which use secondary energy and electric energy, which still makes the cost higher

Method used

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  • A system and method for catalyzing graphitization of coal using solar energy concentration
  • A system and method for catalyzing graphitization of coal using solar energy concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for utilizing solar energy concentration to catalyze the graphitization of coal, comprising the steps of:

[0046] S1. Take a certain amount of anthracite (Shanxi Jincheng coal) and grind it by a coal mill, use a 20-mesh and 40-mesh sieve to sieve a coal sample with a particle size of 20-40 mesh, and take it out after drying in an oven at 105°C for 12 hours; take a certain amount 20-40 mesh dried coal sample 2g, add 10% Fe by mass 3 o 4 Mix well and place in graphitization reactor, pass N 2 , the flow rate is set to 0.5L / min;

[0047] S2. Adjust the concentration so that the reaction temperature rises to 900°C, control the reaction temperature at 900-1200°C, react for 3 hours, take it out after cooling down.

[0048] Taking the product taken out after cooling down as a sample, it is detected and analyzed by XRD (X-ray diffraction), and its degree of graphitization is calculated. The degree of graphitization of the treated graphite-type carbon in this implem...

Embodiment 2

[0050] A method for utilizing solar energy concentration to catalyze the graphitization of coal, comprising the steps of:

[0051] S1. Take a certain amount of anthracite (Shanxi Jincheng coal) and grind it by a coal mill, use a 20-mesh and 40-mesh sieve to sieve a coal sample with a particle size of 20-40 mesh, and take it out after drying in an oven at 105°C for 12 hours; take a certain amount 20-40 mesh dried coal sample 2g, add 10% Fe by mass 2 o 3 Mix well and place in graphitization reactor, pass N 2 , the flow rate is set to 0.5L / min.

[0052] S2. Adjust the light concentration so that the reaction temperature rises to 1200°C, control the reaction temperature at 1200-1500°C, react for 2 hours, and take it out after cooling down.

[0053] Taking the product taken out after cooling down as a sample, it is detected and analyzed by XRD (X-ray diffraction), and its degree of graphitization is calculated. The degree of graphitization of the treated graphite-type carbon in...

Embodiment 3

[0055] A method for utilizing solar energy concentration to catalyze the graphitization of coal, comprising the steps of:

[0056] S1. Take a certain amount of anthracite (Shanxi Jincheng coal) and grind it by a coal mill, use a 20-mesh and 40-mesh sieve to sieve a coal sample with a particle size of 20-40 mesh, and take it out after drying in an oven at 105°C for 12 hours; take a certain amount 20-40 mesh dried coal sample 2g, add 10% iron powder by mass and mix well, then put it in the reactor, pass N 2 , the flow rate is set to 0.5L / min;

[0057] S2. Adjust the degree of concentration so that the reaction temperature rises to 1500°C, control the reaction temperature at 1500-1600°C, react for 1 hour, and take out the product after cooling down; if purification is required, further purification by acid washing can be considered.

[0058] Taking the product taken out after cooling down as a sample, it is detected and analyzed by XRD (X-ray diffraction), and its degree of grap...

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Abstract

The invention relates to a system for catalyzing graphitization of coal by utilizing solar concentration. The system comprises a tower type solar concentrating component and a catalytic graphitizationcomponent; the solar concentrating component comprises a heliostat array and a receiving tower; and the catalytic graphitization component comprises a graphitization reactor disposed on the upper part of the receiving tower. The invention also provides a method for graphitizing pulverized coal by using the system, and the method comprises the following steps: S1, adding pulverized coal and a catalyst into the reactor, introducing inert gas to isolate the reaction raw materials from air; and S2, heating the graphitization reactor to a specified temperature through solar concentration by the heliostat array, and carrying out a reaction for 1-3 hours to obtain a graphitized material. The beneficial effects are as follows that according to the invention, the solar condensation and the catalytic graphitization of coal are effectively combined, and the secondary energy electric energy is replaced by the concentration of the primary energy solar energy to produce a high temperature for catalyzing the graphitization; and according to the requirement of the use of graphite, the solar concentration degree can be appropriately adjusted to change the reaction temperature, so as to reduce theproduction cost of the graphite.

Description

technical field [0001] The invention belongs to the fields of clean utilization of solar energy and utilization of coal resources, and in particular relates to a system and method for catalyzing graphitization of coal by utilizing solar energy concentration. Background technique [0002] Graphite is an excellent carbon material with good thermal stability, thermal conductivity, lubricity and chemical stability, and is widely used in metallurgy, machinery, electrical, chemical and other fields. Due to the large demand, natural graphite can no longer meet the needs of human use, which makes artificial graphite attract much attention. Nowadays, the industrial production of graphite mainly involves calcining petroleum coke, pitch coke, anthracite and other carbon-containing raw materials under anaerobic conditions at around 2500°C. Excessively high temperatures increase the cost of producing graphite. Therefore, how to reduce the reaction temperature and thus reduce the product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/205F24S23/77
CPCY02E10/40Y02P20/133
Inventor 胡松任强强廖广何立模陈小芳向军苏胜汪一许凯张玉飞张雅妮
Owner HUAZHONG UNIV OF SCI & TECH
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