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Low-cost and highly-conductive nano-carbon material preparation method

A nano-carbon material, high-conductivity technology, applied in nano-technology, fibrous fillers, carbon-silicon compound conductors, etc., can solve problems such as low continuous load rate

Inactive Publication Date: 2015-11-04
SUZHOU NAKANGNAMI MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, Dalian University of Technology also carried out experiments on the preparation of carbon materials by thermal plasma technology, and used different carbon sources for cracking, and used ordinary argon welding machines as power discharges. This power supply is a high-current and low-voltage discharge operation, which belongs to high temperature Plasma, very low sustained duty

Method used

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  • Low-cost and highly-conductive nano-carbon material preparation method
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  • Low-cost and highly-conductive nano-carbon material preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1: A method for producing nano-carbon materials using methane as a raw material, using argon as a carrier gas, adding methane to the carrier gas, AC discharge voltage at 20 KV, current at 0.1 A, and discharge gap of 20 mm; DC discharge The voltage is 560 V, the current is 1-25 A, the volume ratio of methane to argon is 1:2, the residence time of the gas in the plasma generator is 0.01 seconds, and then enters an insulated fluidized bed reactor; then The product and tail gas are separated by a cyclone separator, and then the tail gas is used for circulation. The mixed gas of methane and argon is preheated first, and then enters the plasma generating device together with the mixed gas, so that nano-carbon materials are prepared in this way, and the reaction See attached for the process figure 1 shown. In the test, it was measured by using a high-temperature radiometer. Under the above-mentioned working conditions, the temperature of the reactor is about 1000-1800...

Embodiment 2

[0018] Embodiment 2: A method for producing nano-carbon materials using acetylene as a raw material, using nitrogen as a carrier gas, adding acetylene to the carrier gas, AC discharge voltage at 20 KV, current at 0.1 A, and discharge gap of 20 mm; DC discharge voltage The current is 560 V, the current is 1-25 A, the volume ratio of acetylene to argon is 1:4, the residence time of the gas in the plasma generator is 0.03 seconds, and then enters an insulated fluidized bed reactor; then passes through The cyclone separator separates the product and the tail gas, and then the tail gas is used for circulation. The mixed gas of methane and argon is preheated first, and then enters the plasma generating device together with the mixed gas, so that nano-carbon materials are prepared in this way. The reaction process See attached figure 1 shown. In the test, it was measured by using a high-temperature radiometer. Under the above-mentioned working conditions, the temperature of the reac...

Embodiment 3

[0019] Example 3: A method for producing nano-carbon materials using propane as a raw material, using argon as a carrier gas, adding propane to the carrier gas, and adopting an AC-DC combined discharge mode, with an AC discharge voltage of 20 KV and a current of 0.1 A. The gap is 20 mm; the DC discharge voltage is 560 V, and the current is 1-25 A. The volume ratio of propane to argon is 1:3, the residence time of the gas in the plasma generator is 0.01 seconds and then enters the insulated fluidized bed reactor, and then the gas-solid mixture is separated from the product by a cyclone separator, and the tail gas is pre- The hot unreacted mixed gas is then mixed together and then enters the plasma generator for cyclic cracking. The reaction flow chart is attached figure 1 shown. Prepared SEM as Figure 5 shown.

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Abstract

A low-cost and highly-conductive nano-carbon material preparation method comprises: selecting a gaseous or gasifiable carbonaceous feedstock as a carbon source, using carrier gas to carry the feedstock, splitting and generating a nano-carbon material in a plasma generator; using low temperature and high temperature plasma, wherein alternating current multi-electrode combined discharging and direct current multi-electrode combined discharging are combined, a high-voltage small-current mode is applied to alternating current, a low-voltage large-current mode is applied to directly current, and a long-gap-discharge mode is applied; in the plasma generator, high airspeed airflow passing through an arc with the dwell time being short; a reaction product enters a thermally insulated fluidized-bed reactor in which the reaction product stays for 10 seconds to 120 minutes; using a cyclone separator and a filter pocket to collect reactants, so that the carrier gas and partial feed gas that is not cracked can be recycled. If the feed gas needs to be cracked more thoroughly, the feed gas may enter into a second or a third plasma reactor, to obtain the nano-carbon material of low cost, high dispersion, high graphitization and superconductivity.

Description

technical field [0001] The present invention relates to a method for preparing a low-cost and high-conductivity nano-carbon material, in particular to a method for preparing a high-performance nano-carbon material by combining a fluidized bed reactor with plasma technology using an AC / DC multi-electrode combined discharge mode method. Background technique [0002] Carbon (C) is one of the most closely related and important elements that exist in nature and are most closely related to human production and life. Carbon black is an ancient nano product. The ancient Chinese had the practice of burning turpentine to produce carbon black. It was introduced in detail in "Tiangong Kaiwu". The earliest use of carbon black can be traced back to the third century BC. Carbon black is a widely used raw material in the chemical industry. Its main component is carbon, and it also contains a small amount of hydrogen, oxygen, sulfur, ash, tar and water. The 1920s and 1930s were the first s...

Claims

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Application Information

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IPC IPC(8): C09C1/54C09C1/50B82Y40/00H01B1/04
Inventor 洪若瑜孙栋梁谢春荣蒋满云
Owner SUZHOU NAKANGNAMI MATERIALS
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