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A two-stage co-production system and method for coal-based graphite and carbon nanotubes

A carbon nanotube, co-production technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of increasing the cost of graphite production, and achieve the requirements of low equipment requirements, simple production process, and improved economy. Effect

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

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 graphite production.

Method used

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  • A two-stage co-production system and method for coal-based graphite and carbon nanotubes

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Effect test

Embodiment 1

[0048] A two-stage co-production system and method for coal-based graphite and carbon nanotubes, which mainly includes the following steps:

[0049] 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 out 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 20- 20g of coal sample after 40 mesh drying, add 2g Fe 3 o 4 The powder (catalyst 1) is fully mixed and placed on the lower sieve plate 1 of the graphitization reactor, and 1g Ni / Al 2 o 3 The catalyst powder (catalyst 2) is placed on the lower sieve plate 2 of the reforming reactor;

[0050] S2. close the door body at the first inlet and outlet and the second inlet and outlet, and feed N into the graphitization reactor from the carrier gas inlet. 2 , exhaust the air in the graphitization reactor and the reforming reactor, continue to pass the carrier gas, start the electrother...

Embodiment 2

[0054] A two-stage co-production system and method for coal-based graphite and carbon nanotubes, which mainly includes the following steps:

[0055] 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 out 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 20- 20g of 40 mesh dried coal sample, add 1g Fe 2 o 3 The powder (catalyst 1) is fully mixed and placed on the lower sieve plate 1 of the graphitization reactor, and 1g Ni / Al 2 o 3 The catalyst powder (catalyst 2) is placed on the lower sieve plate 2 of the reforming reactor;

[0056] S2. close the door body at the first inlet and outlet and the second inlet and outlet, and feed N into the graphitization reactor from the carrier gas inlet. 2 , exhaust the air in the graphitization reactor and the reforming reactor, continue to pass the carrier gas, start the electrothermal hea...

Embodiment 3

[0060] A two-stage co-production system and method for coal-based graphite and carbon nanotubes, which mainly includes the following steps:

[0061] 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 out 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 20- 40 mesh dried coal sample 20g, add 4g iron powder (catalyst 1) and mix well, place it on the lower sieve plate 1 of the graphitization reactor, and simultaneously add 3g Ni / Al 2 o 3 The catalyst powder (catalyst 2) is placed on the lower sieve plate 2 of the reforming reactor;

[0062] S2. close the door body at the first inlet and outlet and the second inlet and outlet, and feed N into the graphitization reactor from the carrier gas inlet. 2 , exhaust the air in the graphitization reactor and the reforming reactor, continue to pass the carrier gas, start the electrothermal ...

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Abstract

The invention provides a two-section system and method for coproducing coal-base graphite and carbon nano-tubes. The system comprises a graphitization module and a carbon nano-tube generation module,wherein the graphitization module comprises a graphitization reactor, a volatile component outlet is formed in the top wall of the graphitization reactor, and a carrier gas inlet is formed in the bottom wall of the graphitization reactor; the carbon nano-tube generation module comprises a reforming reactor, a waste gas outlet is formed in the top wall of the reforming reactor, and a volatile component inlet and a water vapor inlet are formed in the bottom wall of the reforming reactor; upper and lower sieve plates are arranged in the graphitization reactor and the reforming reactor, respectively, and feeding holes and discharging holes are formed in the side walls of the graphitization reactor and the reforming reactor; and the volatile component outlet and the volatile component inlet arecommunicated through a middle pipeline. The system has the beneficial effects that aiming at the deficiencies that the energy consumption of high-temperature graphitization of coal is high and volatile components in the graphitization process are not effectively utilized in the prior art, a reaction for catalyzing graphitization and a reaction for catalyzing reforming to prepare carbon nano-tubesare effectively combined, so that the gradient utilization of coal resource is realized, and the high value-added product is obtained.

Description

technical field [0001] The invention belongs to the field of coal resource utilization and carbon material preparation, and in particular relates to a two-stage co-production system and method for coal-based graphite and carbon nanotubes. 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 production cost has always ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/205C01B32/162
Inventor 胡松任强强陈小芳廖广何立模张雅妮张玉飞向军苏胜汪一许凯
Owner HUAZHONG UNIV OF SCI & TECH