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Method for preparing carbon nanotubes by low-pressure combustion of coking crude benzol

A technology for carbon nanotubes and coking crude benzene, which is applied in the fields of carbon nanotubes, chemical instruments and methods, nanocarbons, etc., can solve the problems of preparing carbon nanotubes that have not yet been discovered, and achieves low cost, stable flame state, and extended growth time. Effect

Pending Publication Date: 2022-07-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conditions for the growth of carbon nanotubes are carbon sources, heat sources and catalysts. Coked crude benzene and its derivatives provide carbon sources to prepare carbon nanotubes. However, no relevant reports on the preparation of carbon nanotubes using coked crude benzene as raw materials have been found so far.

Method used

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  • Method for preparing carbon nanotubes by low-pressure combustion of coking crude benzol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Using coking crude benzene as raw material to prepare carbon nanotubes, the steps are as follows:

[0032] 1) Dissolve 0.75 mg of nickelocene in 50 mL of coking crude benzene, and stir at room temperature for 30 min to form an active component precursor solution;

[0033] 2) Under the low pressure space of 75KPa, the active component precursor solution obtained in step 1) is loaded into a syringe to control the supply rate of the active component precursor solution by a syringe pump, and it is atomized with an atomizing device and mixed with the solution. Oxygen, which is controlled by a gas mass flow meter, is mixed and ignited to establish a flame;

[0034] 3) Adjust the gas mass flowmeter to make the oxygen rate 2L / min, and adjust the injection rate of the syringe pump to make the supply rate of the active component precursor solution 4.5×10 -3 L / min, burn to obtain the crude carbon nanotube product; use the pressure difference formed between the low pressure space ...

Embodiment 2

[0038] Using coking crude benzene as raw material to prepare carbon nanotubes, the steps are as follows:

[0039] 1) Dissolve 0.70 mg of nickelocene in 50 mL of coking crude benzene, and stir at room temperature for 30 min to form an active component precursor solution;

[0040] 2) Under the low pressure space of 75KPa, the active component precursor solution obtained in step 1) is loaded into a syringe to control the supply rate of the active component precursor solution by a syringe pump, and it is atomized with an atomizing device and mixed with the solution. Oxygen, which is controlled by a gas mass flow meter, is mixed and ignited to establish a flame;

[0041] 3) Adjust the gas mass flowmeter to make the oxygen rate 3L / min, and adjust the injection rate of the syringe pump to make the supply rate of the active component precursor solution 5.0×10 -3L / min, burn to obtain the crude carbon nanotube product; Utilize the pressure difference formed between the low pressure spa...

Embodiment 3

[0045] Using coking crude benzene as raw material to prepare carbon nanotubes, the steps are as follows:

[0046] 1) Dissolve 0.75 mg of ferrocene in 60 mL of coking crude benzene, and stir at room temperature for 30 min to form an active component precursor solution;

[0047] 2) Under the low pressure space of 70KPa, the active component precursor solution obtained in step 1) is loaded into the syringe and the supply rate of the active component precursor solution is controlled by a syringe pump, and it is atomized with an atomizing device and mixed with the solution. Oxygen, which is controlled by a gas mass flow meter, is mixed and ignited to establish a flame;

[0048] 3) Adjust the gas mass flowmeter to make the oxygen rate 2.5L / min, and adjust the injection rate of the syringe pump to make the supply rate of the active component precursor solution 3.0×10 -3 L / min, burn to obtain the crude carbon nanotube product; Utilize the pressure difference formed between the low pr...

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Abstract

The invention discloses a method for preparing carbon nanotubes through low-pressure combustion of coking crude benzol, and belongs to the technical field of preparation of carbon nanotubes. The method comprises the following steps: dissolving a metal catalyst in coking crude benzene to obtain an active component precursor solution, atomizing the active component precursor solution under a low pressure condition, mixing the atomized active component precursor solution with oxygen, and igniting the mixture to obtain the carbon nanotube. The coking crude benzene contains a large amount of aromatic hydrocarbons such as benzene, toluene, xylene, an unsaturated compound and a sulfur-containing compound, the aromatic hydrocarbons and the unsaturated compound provide a carbon source, a sulfur element in the sulfur-containing compound plays a role in promoting the growth of the carbon nanotubes, and compared with other preparation methods, the preparation method has the advantages that the step of adding thiophene as a growth promoting agent is omitted; the carbon nano tube can be prepared under the action of the catalyst without providing an additional heat source by adopting a combustion method, so that the cost can be greatly reduced, and continuous, low-cost and efficient synthesis of the carbon nano tube is realized.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube preparation, in particular to a method for preparing carbon nanotubes by low-pressure combustion of coking crude benzene. Background technique [0002] Since its discovery in 1991, carbon nanotubes have the characteristics of nano-scale lumen structure, high specific surface area, graphite-like multi-layer tube wall and excellent electrical conductivity, as well as the characteristics of tailoring and surface modification. These unique properties make them show great application potential in the fields of hydrogen storage, functionalized composites, secondary batteries, and supercapacitors. However, the harsh preparation conditions and the batch process of carbon nanotubes lead to high manufacturing costs, thus limiting their large-scale applications. [0003] Coal is a kind of resource with abundant reserves and common application. In the process of coal utilization, a large amount of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/16C01B32/162
CPCC01B32/16C01B32/162
Inventor 冯宇赵佳辉米杰张曼王建成阎智锋王文雨薛浪浪武斌张帅国
Owner TAIYUAN UNIV OF TECH
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