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CN-121990560-A - Method and system for preparing horizontal array carbon nano tube by light petroleum

CN121990560ACN 121990560 ACN121990560 ACN 121990560ACN-121990560-A

Abstract

The invention belongs to the field of nano materials, and relates to a method and a system for preparing a horizontal array carbon nano tube from light petroleum. The method takes C 13 -C 22 polycyclic alkane and/or C 13 -C 22 polycyclic aromatic hydrocarbon as a carbon source, and prepares the horizontal array carbon nano tube by using a chemical vapor deposition method. Because the raw materials are cheap and easy to obtain, and the process temperature is low, compared with the traditional preparation process using methane as a carbon source, the method can greatly reduce the cost of the array carbon nano tube.

Inventors

  • CUI CHAOJIE
  • JIAN WEIZHONG
  • ZHANG QI
  • Jiao Ruijing
  • ZHANG SHIJUN

Assignees

  • 中国石油化工股份有限公司
  • 中石化(北京)化工研究院有限公司
  • 清华大学

Dates

Publication Date
20260508
Application Date
20241107

Claims (13)

  1. 1. A method for preparing a horizontal array carbon nano tube by light petroleum is characterized in that C 13 -C 22 polycyclic hydrocarbon and/or C 13 -C 22 polycyclic aromatic hydrocarbon are used as carbon sources, and the horizontal array carbon nano tube is prepared by a chemical vapor deposition method.
  2. 2. The method according to claim 1, wherein the method comprises the steps of: under the protection of inert carrier gas and in the presence of a catalyst, the preheated carbon source enters a horizontal reaction furnace with a substrate arranged therein for chemical vapor deposition reaction to obtain the horizontal array carbon nanotube.
  3. 3. The method according to claim 1 or 2, wherein the conditions of chemical vapor deposition comprise a temperature of 600-900 ℃, preferably 650-850 ℃, a pressure of normal pressure, a time of 0.3-12 hours, preferably 0.5-10 hours.
  4. 4. The method according to claim 2, wherein the preheating is performed in a raw material preheating furnace, the temperature of which is 70-200 ℃, preferably 80-150 ℃.
  5. 5. The process according to claim 2, wherein the catalyst is ferrocene, preferably the catalyst is dissolved in a carbon source at a concentration of 0.001mol/L to 1mol/L.
  6. 6. The method of claim 2, wherein the inert carrier gas is one of nitrogen and argon or two mixed in any ratio; the substrate is a silicon substrate, a silicon oxide substrate or a silicon/silicon oxide substrate.
  7. 7. The method of claim 1 or 2, wherein the horizontal array of carbon nanotubes is ultralong carbon nanotubes having a length of 10-1000 mm.
  8. 8. A system for preparing horizontal array carbon nanotubes from light petroleum for performing the method of any one of claims 1-7, the system comprising a feedstock preheating furnace, a horizontal reaction furnace, an inert carrier gas feed line; The inert carrier gas feeding pipeline is divided into two branches, one branch is connected with the horizontal reaction furnace, and the other branch is connected with the raw material preheating furnace; The raw material preheating furnace is provided with a discharge pipeline, the discharge pipeline is divided into two branches, one branch is connected with the horizontal reaction furnace, and the other branch is communicated with the outside of the system.
  9. 9. The system of claim 8, wherein valves are provided on each branch line of the inert carrier gas feed line and each branch line of the discharge line of the raw material preheating furnace.
  10. 10. The system of claim 8, wherein a substrate is disposed within the horizontal reactor, preferably a silicon substrate, a silicon oxide substrate, or a silicon/silicon oxide substrate.
  11. 11. A method of preparing a horizontal array of carbon nanotubes using the system of any one of claims 8-10, comprising the steps of: (1) Placing a reaction substrate in a horizontal reaction furnace; (2) Inert carrier gas enters the raw material preheating furnace and the horizontal reaction furnace respectively through inert carrier gas feeding pipelines to replace air in the reaction system; (3) Under the condition of introducing inert carrier gas, respectively heating the horizontal reaction furnace and the raw material preheating furnace to a preset temperature; (4) Inert carrier gas flows through the raw material preheating furnace, the gasified carbon source and the catalyst are brought into the horizontal reaction furnace through the discharging pipeline, and the horizontal array carbon nano tube is prepared under the action of the catalyst.
  12. 12. The method of claim 11, wherein the inert carrier gas has a flow distribution ratio in the two branches of 10:1 to 1:10.
  13. 13. The method according to claim 11, wherein the predetermined temperature of the horizontal reactor is 600-900 ℃, preferably 650-850 ℃, and the predetermined temperature of the raw material preheating furnace is 70-200 ℃, preferably 80-150 ℃.

Description

Method and system for preparing horizontal array carbon nano tube by light petroleum Technical Field The invention belongs to the field of nano materials, and particularly relates to a method and a system for preparing a horizontal array carbon nano tube from light petroleum. Background The carbon nano tube is used as a one-dimensional linear nano carbon material formed by sp 2 hybridized carbon through space regular arrangement, has the advantages of excellent mechanical, thermal, electrical, chemical stability and the like, and has wide application in various fields. The array carbon nano tube has the characteristics of perfect arrangement and orientation and structure, and the physical and chemical properties are closer to the intrinsic properties. Has extremely high application value in the fields of mechanical enhancement and the like. The main preparation method of the array carbon nano tube adopts a chemical vapor deposition technology, takes methane as a carbon source under the high temperature condition, and realizes the growth of the carbon nano tube on the substrate under the action of a catalyst. The method has the advantages of high reaction temperature, high energy consumption, low preparation efficiency and high cost of the carbon nano tube, and seriously influences the mass and large-scale preparation of the carbon nano tube. Disclosure of Invention The invention provides a method and a system for preparing an array carbon nano tube by utilizing polycyclic hydrocarbon, which realize the preparation of the array carbon nano tube at low temperature. The raw materials are cheap and easy to obtain, and meanwhile, the process temperature is low, so that the method can greatly reduce the cost. The first aspect of the present invention provides a method for preparing a horizontal array carbon nanotube from light petroleum, wherein the horizontal array carbon nanotube is prepared by using C 13-C22 polycyclic hydrocarbon and/or C 13-C22 polycyclic aromatic hydrocarbon as a carbon source and using a chemical vapor deposition method. A second aspect of the present invention provides a system for preparing horizontal array carbon nanotubes from light petroleum for performing the above method, the system comprising a raw material preheating furnace, a horizontal reaction furnace, an inert carrier gas feed line; The inert carrier gas feeding pipeline is divided into two branches, one branch is connected with the horizontal reaction furnace, and the other branch is connected with the raw material preheating furnace; The raw material preheating furnace is provided with a discharge pipeline, the discharge pipeline is divided into two branches, one branch is connected with the horizontal reaction furnace, and the other branch is communicated with the outside of the system. A third aspect of the present invention provides a method for preparing a horizontal array of carbon nanotubes using the system described above, comprising the steps of: (1) Placing a reaction substrate in a horizontal reaction furnace; (2) Inert carrier gas enters the raw material preheating furnace and the horizontal reaction furnace respectively through inert carrier gas feeding pipelines to replace air in the reaction system; (3) Under the condition of introducing inert carrier gas, respectively heating the horizontal reaction furnace and the raw material preheating furnace to a preset temperature; (4) Inert carrier gas flows through the raw material preheating furnace, the gasified carbon source and the catalyst are brought into the horizontal reaction furnace through the discharging pipeline, and the horizontal array carbon nano tube is prepared under the action of the catalyst. The invention provides a method for preparing an array carbon nano tube by using C 13-C22 polycyclic alkane and polycyclic aromatic hydrocarbon as carbon sources. Because the raw materials are cheap and easy to obtain, and the process temperature is low, compared with the traditional preparation process using methane as a carbon source, the method can greatly reduce the cost of the array carbon nano tube. Additional features and advantages of the invention will be set forth in the detailed description which follows. Drawings Exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 illustrates a system for producing horizontal arrays of carbon nanotubes from light petroleum oil in one embodiment of the present invention. Fig. 2 shows an electron microscope image of a horizontal array of carbon nanotubes produced in one embodiment of the present invention. Detailed Description The following describes specific embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention. The invention provides a method for preparing a horizontal array carb