KR20090013310A - Method and apparatus of collecting carbon nano tube - Google Patents

Abstract

A method of synthesizing carbon nanotube is provided to utilize an inside of a reaction chamber by circulating and reacting the catalyst particle and source gas inside the reaction chamber and synthesizing the carbon nanotube and to improve yield and purity of the carbon nanotube. A method of synthesizing carbon nanotube comprises steps of: intensifying an inside of a horizontally arranged reaction chamber; supplying the catalyst particle inside the reaction chamber in one side of the heated reaction chamber; and circulating the catalyst particle inside the reaction chamber, providing source gas for reacting to the catalyst particle at both sides of the reaction chamber and synthesizing the carbon nanotube.

Description

Carbon nanotube synthesis method and apparatus {METHOD AND APPARATUS OF COLLECTING CARBON NANO TUBE}

The present invention relates to a method and apparatus for synthesizing carbon nanotubes, and more particularly, to a method and apparatus for synthesizing carbon nanotubes using high temperature.

A carbon allotrope, carbon nanotubes, is a material in which one carbon atom is combined with another carbon atom in a hexagonal honeycomb pattern to form a tube, and has a diameter of several nanometers (nm). In particular, carbon nanotubes have excellent mechanical properties, electrical selectivity, field emission characteristics, high efficiency hydrogen storage medium characteristics and the like. Therefore, carbon nanotubes can be applied to a wide range of technical fields such as aerospace, biotechnology, environmental energy, materials industry, medicine, electronic computer, security and safety.

Examples of methods for synthesizing carbon nanotubes include electric discharge, plasma chemical vapor deposition, thermal chemical vapor deposition, and thermal decomposition. Among these methods, thermal chemical vapor deposition and thermal decomposition are common.

In the synthesis of the carbon nanotubes to which the thermal chemical vapor deposition or pyrolysis is applied, as shown in FIG. 1, a cylindrical reactor (1) having a major axis horizontally formed therein and a heating unit for heating the reactor (1) ( Use a synthesis device that includes 3). Here, the heating unit 3 has a structure mainly surrounding the cylindrical reactor 1, and heats the reactor 1 at a temperature of about 600 ℃ to 1,000 ℃. In addition, the synthesis apparatus of FIG. 1 has a structure in which gas is provided to one side of the reactor 1 and gas is discharged to the other side facing the one side. Accordingly, carbon nanotubes are synthesized on the substrate by providing gas while heating the reactor 1 in which the substrate is accommodated at a high temperature.

The synthesis apparatus of FIG. 1 has a structure in which the heating unit 3 does not surround the entire reactor 1 but surrounds a part thereof. This is because when the heating part 3 surrounds the entire reactor 1, it may have a thermal effect on the other member located in the periphery. Therefore, the spatial efficiency of the reactor 1 is lowered because the substrate is placed only at the portion of the reactor 1 corresponding to the portion surrounded by the heating unit 3.

In addition, since the synthesis apparatus directly heats the reactor 1 itself, it may cause a cause of shortening the life of the reactor 1. In addition, the synthesis apparatus is somewhat hindered in size due to the decrease in spatial efficiency.

One object of the present invention is to provide a method for synthesizing carbon nanotubes in which catalyst particles and a source gas react while circulating inside a reaction chamber.

Another object of the present invention is to provide a device for synthesizing carbon or tube which can easily perform the above-mentioned method.

In the carbon nanotube synthesis method according to the embodiments of the present invention for achieving the above object, it is heated inside the reaction chamber of the horizontal cylinder type. Then, catalyst particles are supplied into the reaction chamber from one side of the heated reaction chamber. At this time, while circulating the catalyst particles inside the reaction chamber, source gases for reacting with the catalyst particles are provided at both sides of the reaction chamber to synthesize carbon nanotubes.

According to embodiments of the present invention, the source gas may be provided at different heights at both sides of the reaction chamber to circulate the catalyst particles in the reaction chamber. Alternatively, the source gas may be provided in different directions on both sides of the reaction chamber to circulate the catalyst particles inside the reaction chamber.

Carbon nanotube synthesis apparatus according to embodiments of the present invention for achieving the above another object includes a reaction chamber, a catalyst supply and a source gas providing. The reaction chamber has a tubular structure arranged horizontally, and provides a space for synthesizing carbon nanotubes therein using heat provided from the outside. The catalyst supply unit is disposed on one side of the reaction chamber and supplies catalyst particles into the reaction chamber. The source gas providing unit is disposed to face each other in the reaction chamber, and provides source gas for reacting with the catalyst particles on both sides of the reaction chamber while circulating the catalyst particles inside the reaction chamber.

According to embodiments of the present invention, both ends of the reaction chamber may have a curved shape.

According to embodiments of the present invention, the catalyst supply unit may further include a catalyst injection nozzle disposed on one side of the reaction chamber to provide the catalyst particles into the reaction chamber.

According to embodiments of the present invention, the source gas providing unit is disposed adjacent to the catalyst injection nozzle and the first source gas injection nozzle for injecting the source gas into the reaction chamber and the first source gas injection nozzle It may further include a second source gas injection nozzle disposed on the opposite side for injecting the source gas into the reaction chamber. For example, the first source gas injection nozzle and the second source gas injection nozzle are disposed at different heights on both sides of the reaction chamber to inject the source gas. Alternatively, the first source gas injection nozzle and the second source gas injection nozzle may be disposed at the same height on both sides of the reaction chamber, and may spray the source gas at different angles.

According to embodiments of the present invention, the source gas includes a reaction gas for reacting with the catalyst particles to synthesize carbon nanotubes and a carrier gas for circulating the catalyst particles in the reaction chamber.

According to embodiments of the present invention, the reaction chamber is connected to the remaining part of the reaction chamber except for the portion where the catalyst injection nozzle and the source gas injection nozzle is formed, a gas for discharging the source gas to the outside of the reaction chamber It may further include a discharge. For example, the gas discharge portion has a cylindrical type structure for discharging the source gas to the outside in a cyclone manner.

According to the embodiments of the present invention, the gas discharge unit may further include a catalyst recovery unit for recovering the catalyst particles discharged from the reaction chamber into the reaction chamber.

According to the present invention described above, by synthesizing carbon nanotubes by circulating the catalyst particles and the source gas in the reaction chamber, it is possible to make full use of the inner space of the reaction chamber and improve the yield and purity of the carbon nanotubes.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar components. In the accompanying drawings, the dimensions of the structures are shown in an enlarged scale than actual for clarity of the invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described in the specification, and that one or more other features It should be understood that it does not exclude in advance the possibility of the presence or addition of numbers, steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

2 is a schematic flowchart illustrating a method for synthesizing carbon nanotubes according to embodiments of the present invention.

2, in the carbon nanotube synthesis method according to the embodiments of the present invention, first heating the interior of the reaction chamber (S100), and supplies the catalyst particles into the heated reaction chamber (S200) . Then, carbon nanotubes are synthesized by providing a source gas at both sides of the reaction chamber (S300).

Specifically, the inside of the reaction chamber is heated to a set temperature using a heating unit. For example, the interior of the reaction chamber is preheated by heating the interior of the reaction chamber to a temperature lower than the target temperature. Alternatively, the interior of the reaction chamber may be heated to a target temperature at which the source gas and catalyst particles can react. For example, the target temperature may be about 500 to 1,100 ° C. (S100).

Catalyst particles are fed into the heated reaction chamber. For example, the catalyst particles mainly include iron, nitel, and the like. On the other hand, the catalyst particles may have a spherical shape. Here, the use of spherical catalyst particles is to ensure a relatively large area for reacting with the provided source gas. On the other hand, the size, density, degree of aggregation, etc. of the catalyst particles may be variously changed according to the conditions, types, and the like of the process.

On the other hand, a catalyst injection nozzle, part of which protrudes into the reaction chamber, injects catalyst particles. For example, the catalyst spray nozzle may spray catalyst particles in a pneumatic manner. Therefore, compared with the conventional method of applying catalyst particles on a substrate and / or a boat and synthesizing carbon nanotubes only on the substrate and / or a boat, the internal space of the reaction chamber may be utilized as a whole (S200).

A source gas for reacting with the catalyst particles is supplied into the reaction chamber. For example, a source gas injection nozzle is used to provide the source gas inside the reaction chamber. In embodiments of the present invention, the source gas includes a reactant gas and a carrier gas. The reaction gas reacts with the catalyst particles to synthesize carbon nanotubes, and the carrier gas circulates the catalyst particles in the reaction chamber. For example, the reaction gas includes acetylene, ethylene, methane, benzene, xylene, carbon monoxide, carbon dioxide, and the like, and the carrier gas includes an inert gas such as argon gas, neon gas, and the like.

In embodiments of the present invention, source gas is provided at both sides of the reaction chamber. That is, source gas injection nozzles for injecting the source gas are disposed opposite to each other in the reaction chamber. For example, source gases are provided at different heights on both sides of the reaction chamber. Alternatively, source gases may be provided at different angles at the same height on both sides of the reaction chamber. Thus, the source gas is provided at different heights and / or in different directions on both sides of the reaction chamber, so that previously supplied catalyst particles circulate inside the reaction chamber. This allows the catalyst particles to react with the source gas while circulating inside the reaction chamber. In particular, since the source gas is provided in both directions, the catalyst particles can react with the source gas while circulating in the clockwise or counterclockwise direction inside the reaction chamber.

Therefore, the substrate is supplied to the inside of the reaction chamber by a separate boat, and the carbon nanoparticles of the present invention are compared with the conventional carbon nanotube synthesis apparatus in which carbon nanotubes are synthesized by reacting catalyst particles formed on the substrate with a reaction gas. The tube synthesizing apparatus can make full use of the internal space of the reaction chamber. Therefore, it is possible to improve the synthesis yield and purity of the carbon nanotubes (S300).

As such, the source gas and the catalyst particles circulate inside the reaction chamber, thereby reducing wasted space inside the reaction chamber. Furthermore, the efficiency of the carbon nanotube synthesis process may be improved, and the yield and purity of the carbon nanotubes may be improved.

3 is a schematic diagram illustrating a carbon nanotube synthesis apparatus according to embodiments of the present invention. 4 to 8 are configuration diagrams for explaining in detail the components of the carbon nanotube synthesis apparatus according to the embodiments of the present invention.

Referring to FIG. 3, the carbon nanotube synthesis apparatus 100 according to the embodiments of the present invention includes a reaction chamber 200, a catalyst supply part 300, and a source gas supply part 400.

The reaction chamber 200 provides a space for synthesizing carbon nanotubes therein. In particular, the reaction chamber 200 may provide a space for synthesizing the carbon nanotubes using heat provided from the outside. At this time, the heat may be about 500 to 1,100 ℃. Therefore, the reaction chamber 200 is formed of a material that can withstand the heat. For example, the reaction chamber 200 may be made of quartz, graphite, or a mixture thereof.

In embodiments of the present invention, the reaction chamber 200 has a tubular structure arranged horizontally. For example, the reaction chamber 200 may have a cylindrical shape in which its long axis lies horizontally. In addition, both ends of the reaction chamber 200 may have a curved shape. That is, the reaction chamber 200 may have a rounded shape at both ends. This is to naturally circulate along the shape of the curve from both ends of the reaction chamber 200 to the top or the bottom when the catalyst particles and / or source gas flows inside the reaction chamber 200. As such, the reaction chamber 200 may be a horizontal reactor for synthesizing carbon nanotubes using a flow of catalyst particles and a source gas.

The catalyst supply unit 300 supplies catalyst particles into the reaction chamber 200. For example, the catalyst particles include transition metals such as iron and cobalt.

Referring to FIG. 4, the catalyst supply unit 300 includes a catalyst reservoir 310 containing catalyst particles. Accordingly, when an inert gas is provided to the catalyst storage unit through the first tube 320 from the outside, the catalyst particles may be discharged to the outside through the second tube 330 by the inert gas. The catalyst particles are supplied to the outside from the catalyst reservoir 310 in the same manner as described above.

Referring back to FIG. 3, after the catalyst particles are discharged from the catalyst reservoir 310 through the second tube 330, the catalyst supply unit 300 supplies the catalyst particles into the reaction chamber 200. The catalyst supply unit 300 supplies catalyst particles through a catalyst supply pipe 340 formed through the side wall of the reaction chamber 200. Therefore, the catalyst supply pipe 340 is connected to the second pipe 330. In addition, the catalyst control unit 350 disposed in one region of the catalyst supply pipe 340 may adjust the amount of catalyst particles supplied. The catalyst controller 350 may control to constantly supply the amount of catalyst particles. For example, the catalyst control unit 350 may be a control valve.

Meanwhile, the catalyst supply unit 300 may further include a catalyst injection nozzle 360 disposed on one side of the reaction chamber 200. A portion of the catalyst injection nozzle 360 protrudes into the reaction chamber 200 and injects catalyst particles into the reaction chamber 200. For example, the catalyst spray nozzle 360 may spray catalyst particles in a pneumatic manner.

The source gas providing unit 400 provides a source gas into the reaction chamber 200. At this time, the source gas providing unit 400 provides a source gas into the reaction chamber 200 through the source gas providing pipe 410. At this time, the source gas control valve 420 may be disposed in one region of the source gas providing pipe 410 to adjust the amount of source gas provided.

Referring to FIG. 5, the source gas providing unit 400 may include a reaction gas providing unit 430 and a carrier gas providing unit 440.

For example, the reaction gas providing unit 430 provides a reaction gas for reacting with the catalyst particles to synthesize carbon nanotubes in the reaction chamber 200. In addition, the carrier gas providing unit 440 provides a carrier gas to circulate the catalyst particles in the reaction chamber 200 to the reaction chamber 200. Here, the reaction gas may include acetylene, ethylene, methane, benzene, xylene, carbon monoxide, carbon dioxide, and the like, and the carrier gas may include an inert gas such as argon gas or chromium gas.

When the carrier gas providing unit 440 provides the carrier gas into the reaction chamber 200, the catalyst particles flow and / or circulate inside the reaction chamber 200. At this time, the reaction gas may be blocked by the reaction gas control valve 432. When the catalyst particles circulate inside the reaction chamber 200, the reaction gas providing unit 430 provides the reaction gas into the reaction chamber 200. At this time, the amount of the carrier gas may be adjusted by the carrier gas control valve 442. For example, since the catalyst particles must be continuously circulated inside the reaction chamber 200, the carrier gas is not completely blocked, and the amount supplied thereof will be reduced. For example, the mixing ratio of the carrier gas and / or the reactant gas may be adjusted by the reactant gas control valve 432 and the carrier gas control valve 442. As such, the reaction gas and the catalyst particles are circulated inside the reaction chamber 200 to react with the carbon nanotubes.

In addition, the source gas providing unit 400 injects the source gas through the source gas injection nozzle 450, a part of which protrudes into the reaction chamber 200. The source gas injection nozzle 450 includes a first source gas injection nozzle 452 and a second source gas injection nozzle 454.

The first source gas injection nozzle 452 is disposed adjacent to the catalyst injection nozzle 360 to inject the source gas into the reaction chamber 200. In addition, the second source gas injection nozzle 454 is disposed opposite to the first source gas injection nozzle 452 to inject the source gas into the reaction chamber 200.

Referring to FIG. 6, the first source gas injection nozzle 452 and the second source gas injection nozzle 454 are disposed at different heights on both sides of the reaction chamber 200. For example, the first source gas injection nozzle 452 adjacent to the catalyst injection nozzle 360 is disposed below one end of the reaction chamber 200, and the second source gas injection nozzle 454 is the reaction chamber 200. Is arranged on top of the other end. Alternatively, the first source gas injection nozzle 452 may be disposed above and the second source gas injection nozzle 454 may be disposed below. As such, the first source gas injection nozzle 452 and the second source gas injection nozzle 454 are disposed at different heights. Accordingly, the source gases injected by the first and second source gas injection nozzles 452 and 454 are provided in the opposite directions from the top and the bottom, and the source gas is changed from the end of the reaction chamber 200 upward or downward. May be circulated inside the reaction chamber 200.

Referring to FIG. 7, the first source gas injection nozzle 456 and the second source gas injection nozzle 458 are disposed at the same height on both sides of the reaction chamber 200. In addition, the first and second source gas injection nozzles 456 and 458 spray source gas at different angles. For example, the first source gas injection nozzle 456 injects the source gas downward, and the second source gas injection nozzle 458 injects the source gas upward. Alternatively, the injection angles and / or directions of the first and second source gas injection nozzles 456 and 458 may be variously changed. Thus, source gas injected by the first and second source gas injection nozzles 456 and 458 may circulate inside the reaction chamber 200.

In this way, the source gas from the source gas providing unit 400 circulates inside the reaction chamber 200 and circulates the catalyst particles. Therefore, since the source gas and the catalyst particles react while circulating in the internal space of the reaction chamber 200, the internal space of the reaction chamber 200 may be utilized as a whole. Thus, the synthesis yield and purity of the carbon nanotubes are improved.

Referring back to FIG. 3, the carbon nanotube synthesis apparatus 100 further includes a heating part 500, a gas discharge part 600, and a pressure adjusting part 700.

The heating unit 500 heats the inside of the reaction chamber 200. For example, the heating part 500 is disposed surrounding the reaction chamber 200. For example, the heating unit 500 may heat the internal temperature of the reaction chamber 200 to a temperature of about 500 to 1,100 ° C. The heating unit 500 may include a heating coil surrounding the reaction chamber 200.

The gas discharge part 600 is disposed above the reaction chamber 200. The gas discharge part 600 discharges the source gas from the reaction chamber 200 to the outside of the reaction chamber 200. For example, the gas outlet 600 may include an exhaust pump.

Referring to FIG. 8, the gas discharge unit 600 may include a gas discharge pipe 610 connected to the reaction chamber 200 and a gas valve 620 for adjusting the amount of gas discharged in one region of the gas discharge pipe 610. Include.

In addition, the gas discharge part 600 includes a cyclone container 630, an exhaust part 640, and a catalyst recovery part 650. The cyclone container 630 is connected to one side of the gas discharge pipe 610, and the exhaust unit 640 exhausts the source gas from the cyclone container 630 to the outside. In addition, the catalyst recovery unit 650 is connected to the lower portion of the cyclone vessel 630 and recovers the catalyst particles discharged from the reaction chamber 200 to the reaction chamber 200. For example, when the gas discharge part 600 discharges the source gas and / or the catalyst particles from the reaction chamber 200 through the gas discharge pipe 610, a relatively heavy catalyst particle is used by using a cyclon method. Guided to the bottom of the cyclone vessel 630, the light source gas may be exhausted to the outside through the exhaust 640. Therefore, the gas discharge unit 600 may discharge the source gas to the outside.

The pressure regulator 700 is connected to the reaction chamber 200 to adjust the pressure state inside the reaction chamber 200. For example, the pressure regulating unit 700 includes a pressure regulating tube 710 and a pressure regulating valve 720 which are passages for adjusting a pressure state in the reaction chamber 200. Accordingly, the pressure adjusting unit 700 may maintain the vacuum state by reducing the inside of the reaction chamber 200.

In addition, the carbon nanotube synthesis apparatus 100 may further include a recovery unit (not shown) for recovering the synthesized carbon nanotubes. The recovery unit may be disposed above the reaction chamber 200. This is because the synthesized carbon nanotubes are relatively lighter than the catalyst particles and thus are easily recovered from the top. Alternatively, the recovery unit may be disposed in another region of the reaction chamber 200, and may be recovered by using a separate device after the carbon nanotube synthesis process is completed.

As such, since the source gas reacts with the catalyst particles in the horizontally arranged reaction chamber 200, the internal space of the reaction chamber 200 may be utilized as a whole. Therefore, the efficiency of the carbon nanotube synthesis process can be increased, and the yield and purity of the synthesized carbon nanotubes can be improved.

According to the present invention, the source gas and the catalyst particles are reacted while circulating inside the reaction chamber. Therefore, by utilizing the space inside the reaction chamber as a whole, not only the reaction rate of the source gas and the catalyst particles can be improved, but also the space efficiency can be improved. Accordingly, the efficiency of the carbon nanotube synthesis process can be increased, and the yield and purity of the synthesized carbon nanotubes can be improved.

As described above, although described with reference to preferred embodiments of the present invention, those skilled in the art will be variously modified without departing from the spirit and scope of the invention described in the claims below. And can be changed.

1 is a schematic configuration diagram showing a conventional carbon nanotube synthesis apparatus.

2 is a schematic flowchart illustrating a method for synthesizing carbon nanotubes according to embodiments of the present invention.

3 is a schematic diagram illustrating a carbon nanotube synthesis apparatus according to embodiments of the present invention.

4 is a diagram illustrating in detail a part of the catalyst supply unit of FIG. 3.

FIG. 5 is a diagram illustrating in detail the source gas providing unit of FIG. 3.

6 is a configuration diagram illustrating an example of the source gas nozzle of FIG. 3.

FIG. 7 is a diagram illustrating another example of the source gas nozzle of FIG. 3.

FIG. 8 is a diagram illustrating the gas discharge unit of FIG. 3 in detail.

<Description of the symbols for the main parts of the drawings>

100: carbon nanotube synthesis apparatus 200: reaction chamber

300: catalyst supply unit 310: catalyst storage unit

320: first tube 330: second tube

340: catalyst gas supply pipe 350: catalyst gas control unit

360: catalyst gas injection nozzle 400: source gas supply unit

430: source gas injection nozzle 432: first source gas injection nozzle

434: second source gas injection nozzle 440: reactive gas providing unit

450: carrier gas providing unit 500: heating unit

600: gas discharge part 610: gas discharge pipe

620: gas valve 630: cyclone vessel

640 gas exhaust pipe 650 catalyst recovery unit

700: pressure regulator

Claims (12)

Heating the inside of the barrel type reaction chamber arranged horizontally; Supplying catalyst particles into the reaction chamber from one side of the heated reaction chamber; And And synthesizing the carbon nanotubes by providing source gas for reacting with the catalyst particles while circulating the catalyst particles in the reaction chamber at both sides of the reaction chamber. The method of claim 1, wherein the source gas is provided at different heights on both sides of the reaction chamber to circulate the catalyst particles in the reaction chamber. The method of claim 1, wherein the source gas is provided in different directions on both sides of the reaction chamber to circulate the catalyst particles in the reaction chamber. A reaction chamber having a tubular structure arranged horizontally and providing space for synthesizing carbon nanotubes therein using heat provided from the outside; A catalyst supply unit disposed at one side of the reaction chamber and supplying catalyst particles into the reaction chamber; And Carbon nanotube synthesis comprising a source gas providing portion disposed on both sides of the reaction chamber facing each other, and providing a source gas for reacting with the catalyst particles in both sides of the reaction chamber while circulating the catalyst particles inside the reaction chamber Device. The apparatus of claim 4, wherein both ends of the reaction chamber have a curved shape. The method of claim 4, wherein the catalyst supply unit Carbon nanotube synthesizing apparatus further comprises a catalyst injection nozzle disposed on one side of the reaction chamber and for providing the catalyst particles into the reaction chamber. The method of claim 4, wherein the source gas providing unit A first source gas injection nozzle disposed adjacent to the catalyst injection nozzle to inject the source gas into the reaction chamber; And And a second source gas injection nozzle disposed opposite the first source gas injection nozzle to inject the source gas into the reaction chamber. The carbon nanotube synthesizing apparatus of claim 7, wherein the first source gas injection nozzle and the second source gas injection nozzle are disposed at different heights on both sides of the reaction chamber to inject the source gas. The method of claim 7, wherein the first source gas injection nozzle and the second source gas injection nozzle are disposed at the same height on both sides of the reaction chamber and inject the source gas at different angles. Tube synthesis apparatus. The carbon nanotubes of claim 4, wherein the source gas comprises a reaction gas for synthesizing carbon nanotubes by reacting with the catalyst particles and a carrier gas for circulating the catalyst particles in the reaction chamber. Synthetic device. The reaction chamber of claim 4, wherein the reaction chamber is connected to the remaining portion of the reaction chamber except for the portion where the catalyst injection nozzle and the source gas injection nozzle are formed, and further includes a gas discharge part for discharging the source gas to the outside of the reaction chamber. Carbon nanotube synthesizing apparatus comprising a. The method of claim 11, wherein the gas discharge portion has a cylindrical type structure for discharging the source gas to the outside in a cyclone manner, And a catalyst recovery unit connected to a lower portion of the gas discharge unit and configured to recover the catalyst particles discharged from the reaction chamber into the reaction chamber.

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