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Equipment for production of carbon nanotubes with fluidized bed and preparation method thereof

A technology of carbon nanotubes and fluidized beds, applied in the direction of carbon nanotubes, chemical instruments and methods, and nanocarbons, can solve the problems of complex fixed bed production equipment, high energy consumption, and low production efficiency, and achieve high operational flexibility , low energy consumption, and the effect of providing utilization

Pending Publication Date: 2018-02-16
허난구오안일렉트릭머터리얼컴퍼니리미티드 +1
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Problems solved by technology

[0003] At present, the large-scale industrial production of carbon nanotubes is mainly the vapor deposition method (CVD method). The methods and equipment used in the vapor deposition method are fixed bed and fluidized bed. The fluidized bed production in the vapor deposition method uses carbon source gas, nitrogen, and hydrogen. Mixed gas feed, fixed bed production equipment is complex, high energy consumption, low production efficiency

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  • Equipment for production of carbon nanotubes with fluidized bed and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0018] An apparatus for producing carbon nanotubes in a fluidized bed, such as figure 1 Shown, comprise main reaction furnace 1, gas distributor 2, fluidized bed 3 and gas-solid separator 4, fluidized bed 3 is positioned at the middle and lower part of main reaction furnace 1, and gas-solid separator 4 is positioned at the top of main reaction furnace 1, The bottom end of the gas-solid separator 4 is inserted into the fluidized bed 3 and the top of the gas-solid separator 4 is directly discharged from the top of the main reaction furnace 1; the bottom of the main reaction furnace 1 is provided with a carbon source gas inlet 5, and a gas distributor 4 It is arranged on the upper side of the carbon source gas inlet 5 and installed on the cross section of the main reaction furnace 1 at the bottom of the fluidized bed 3; A catalyst inlet 6 for adding catalyst, and a carbon nanotube outlet 7 for continuously generating carbon nanotubes are provided at the obliquely downward positio...

Embodiment 2

[0023] The structure of this embodiment is the same as that of Embodiment 1, and will not be repeated here; the difference is that the control parameters selected in this embodiment are different from those of Embodiment 1, as follows:

[0024] The corresponding preparation method of producing carbon nanotubes with a fluidized bed of this embodiment comprises the following steps:

[0025] Electric heating is used to control the temperature of the fluidized bed to 750°C, and ethylene gas is introduced from the carbon source gas inlet at the bottom of the main reaction furnace, and the superficial velocity of the gas is controlled to be 20 cm / s; at the same time, according to the carbon element in the gas Add metal oxide catalysts such as iron, cobalt and nickel continuously in an amount of about 1%.

[0026] Fluidize and react in the fluidized bed, and generate carbon nanotubes with a diameter of 4-80 nanometers and a length of 0.5-200 microns, which are continuously discharged...

Embodiment 3

[0029] The structure of this embodiment is the same as that of Embodiment 1, and will not be repeated here; the difference is that the materials and control parameters selected in this embodiment are different from those of Embodiment 1, as follows:

[0030] The corresponding preparation method of producing carbon nanotubes with a fluidized bed of this embodiment comprises the following steps:

[0031] Use tail gas to burn in the jacket on the outer wall of the fluidized bed, control the temperature to 900°C, feed methane gas from the carbon source gas inlet at the bottom of the main reactor, and control the superficial velocity of the gas to 50 cm / s;

[0032] At the same time, iron, cobalt, nickel and other metal oxide catalysts are continuously added in an amount of about 1% of the carbon element in the gas. Fluidize and react in the fluidized bed, and generate carbon nanotubes with a diameter of 4-80 nanometers and a length of 0.5-200 microns, which are continuously dischar...

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Abstract

The invention provides equipment for production of carbon nanotubes with a fluidized bed and a preparation method thereof. The equipment consists of a main reaction furnace, a gas distributor, a fluidized bed and a gas-solid separator. The bottom of the main reaction furnace is equipped with a carbon source gas inlet, and the gas distributor is arranged at the upper side of a carbon source gas inlet and is mounted at the bottom end of the fluidized bed. A catalyst inlet is disposed at an obliquely upward part on the outer wall of the main reaction furnace at the fluidized bed top, and a carbonnanotube outlet is arranged at an obliquely downward part on the outer wall of the main reaction furnace at the lower-middle part of the fluidized bed. The preparation method comprises the steps of:sending a prepared mixed metal oxide catalyst directly into the fluidized bed in the main reaction furnace; and introducing olefin gas of 4 or less than 4 carbon into the fluidized bed at 600-1000DEGC to obtain carbon nanotubes with a diameter of 4-80nm and a length of 0.5-200micrometer, and then performing discharge from the outlet. The equipment has the advantages of simple structure, easy operation and low energy consumption, and is suitable for continuous production of carbon nanotubes with kiloton annual output.

Description

【Technical field】 [0001] The invention relates to a carbon nanotube processing technology, in particular to a device for producing carbon nanotubes with a fluidized bed and a preparation method thereof. 【Background technique】 [0002] At present, carbon nanotubes have a tiny cylindrical structure with a diameter of several to tens of nanometers and an aspect ratio of 10-1000. Carbon nanotubes have a honeycomb-like hexagonal pattern in which each carbon atom is bonded to three adjacent carbon atoms. In addition, depending on their structure, carbon nanotubes can act like metals as conductors or as semiconductors. In the absence of oxygen, its melting point is above 3000°C. At room temperature, the chemical properties of carbon nanotubes are relatively stable, and they are insoluble in water, dilute acids, dilute alkalis and organic solvents; they react with oxygen at different temperatures to form carbon dioxide or carbon monoxide. [0003] At present, the large-scale indus...

Claims

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Application Information

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IPC IPC(8): C01B32/164
CPCC01B2202/34C01B2202/36
Inventor 崔清臣凌红旗张泉荣李彤宇
Owner 허난구오안일렉트릭머터리얼컴퍼니리미티드
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