CN114590800B - Method for continuously preparing graphene by magnetic drive sliding arc plasma high-voltage discharge - Google Patents
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- CN114590800B CN114590800B CN202210347490.7A CN202210347490A CN114590800B CN 114590800 B CN114590800 B CN 114590800B CN 202210347490 A CN202210347490 A CN 202210347490A CN 114590800 B CN114590800 B CN 114590800B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 34
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000011280 coal tar Substances 0.000 claims abstract description 32
- 238000007233 catalytic pyrolysis Methods 0.000 claims abstract description 25
- 239000001257 hydrogen Substances 0.000 claims abstract description 24
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 24
- 239000002243 precursor Substances 0.000 claims abstract description 21
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052786 argon Inorganic materials 0.000 claims abstract description 17
- 238000000197 pyrolysis Methods 0.000 claims abstract description 16
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 3
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 28
- 238000000926 separation method Methods 0.000 claims description 16
- 238000002309 gasification Methods 0.000 claims description 14
- 239000011261 inert gas Substances 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 239000001307 helium Substances 0.000 claims description 8
- 229910052734 helium Inorganic materials 0.000 claims description 8
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 8
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- 239000002105 nanoparticle Substances 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 239000000047 product Substances 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 150000001721 carbon Chemical class 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910003481 amorphous carbon Inorganic materials 0.000 description 2
- 238000001241 arc-discharge method Methods 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000007833 carbon precursor Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 230000004907 flux Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 239000013076 target substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a method for continuously preparing graphene by magnetic drive sliding arc plasma high-voltage discharge, which comprises the steps of gasifying coal tar, feeding the gasified coal tar into a catalytic pyrolysis furnace filled with argon, adding nano metal or metal oxide as a catalyst into the pyrolysis furnace, mixing and reacting gaseous coal tar with the catalyst to generate a carbonized precursor, feeding the carbonized catalytic precursor and hydrogen into a magnetic drive sliding arc plasma discharge device, generating high-density non-thermal sliding arc plasma by an auxiliary magnetic field, and converting the carbonized precursor under the action of the high-density non-thermal sliding arc plasma to generate graphene; the method has the advantages of low cost, simple equipment and no need of condensation, and can realize the conversion from coal tar to the graphene with high added value product.
Description
Technical Field
The invention belongs to the technical field of graphene preparation, and particularly relates to a method for continuously preparing graphene by magnetic drive sliding arc plasma high-voltage discharge.
Background
The coal tar is mainly obtained through a coal pyrolysis carbonization process, is a byproduct in the coking process, and has the yield accounting for 3% -5% of the coal in the furnace. The tar has complex chemical structure, poor stability, low heat value and toxicity, and can block pipelines and equipment. The fraction is heavy and has poor quality, and particularly, the quality and content of metal and asphalt are high, so that the comprehensive chemical analysis and utilization of coal tar are difficult tasks. Coal tar contains a large amount of polycyclic aromatic hydrocarbon, and can be used as a carbon source for preparing graphene. The graphene is produced by a plurality of methods, a mechanical stripping method is adopted in a common method, the cost is low, the operation is easy, the yield and the purity are low, and the product structure is inconsistent; the method for cutting the carbon nano tube is characterized in that the prepared graphene has high elasticity and high tensile strength, but is aggregated in a solvent in a refractory manner Jie Yi; the arc discharge method has the advantages of easier production, no need of substrate transfer, high repeatability, but high reaction energy consumption; the chemical vapor deposition method has low cost and high yield, is beneficial to industrial production, is difficult to position a proper substrate, and has easily damaged graphene molecular structure; the reduced graphite oxidation method is simple to operate and high in yield, but the product has certain defects; the graphene prepared by the catalytic pyrolysis method has large area and good uniformity, but the preparation process is still immature and has strict requirements on equipment. In general, although the physical method for preparing the graphene has low synthesis cost and simple technology, the prepared graphene has low purity, inconsistent structure and weak controllability. Chemical methods often limit the industrial production of graphene due to expensive carbon precursors, difficulty in locating suitable substrates, product structural defects, and the like.
The arc plasma discharge does not need a catalyst, the process is simple, no pollution is caused, but a carbon source is easy to crack at high temperature to generate target substances, a large amount of byproducts are generated at the same time, and the arc discharge method has higher energy consumption and more expensive environmental conditions. While sliding arc plasma is a non-thermal plasma with little erosion of the electrode and does not require cooling of the electrode. Ma Sali g university ( Hypergravity synthesis of graphitic carbon nanomaterial in glide arc plasma[J]. Materials Research Bulletin, 2014, 54:61-65.) a nanostructured carbon material was synthesized using a methane/helium sliding arc plasma under hypergravity conditions. The sliding movement of sliding arc discharge along the electrode is more prominent due to the action of gravity, but the research process low-temperature plasma generator adopts a double-blade electrode reactor, so that the problems of poor arc stability, small reaction contact area and the like exist, and industrialization is difficult to realize. The group (Continuous preparation and formation mechanism of few-layer graphene by gliding arc plasma[J]. Chemical Engineering Journal, 2020, 387:124102.) of the object Hong Reyu of the Fuzhou university reports that the sliding arc plasma pyrolysis using methane as a carbon source prepares few layers of graphene powder, but the sliding arc plasma is non-thermal plasma, so that the system flux is low and the reaction efficiency is low due to the small volume and low energy density.
Disclosure of Invention
In order to solve the problems, the invention provides a method for continuously preparing graphene by magnetic drive sliding arc plasma high-voltage discharge, which comprises the steps of gasifying coal tar, feeding the gasified coal tar into a catalytic pyrolysis furnace filled with argon or helium, adding nano metal or metal oxide as a catalyst into the pyrolysis furnace, mixing and reacting gaseous coal tar with the catalyst to generate a carbonized precursor, feeding the carbonized catalytic precursor and hydrogen into a magnetic drive sliding arc plasma discharge device, generating high-density non-thermal sliding arc plasma by an auxiliary magnetic field, and converting the carbonized precursor under the action of the high-density non-thermal sliding arc plasma to generate graphene.
According to the invention, the gaseous coal tar is subjected to preliminary pyrolysis under the condition of argon or helium, hydrocarbon in the gaseous coal tar reacts with a catalyst, carbon bonds are combined with the catalyst to generate a carbonized precursor while dehydrogenation, the carbonized precursor is subjected to pyrolysis cracking in a magnetic drive sliding arc plasma discharge device, carbon atoms are combined at high temperature to generate carbon clusters and carbon chains, and the carbonized precursor is continuously elongated to generate large-area graphene; the suspension carbon bond is terminated by hydrogen, the graphene is prevented from forming a closed structure, a graphene product is deposited at the bottom of the magnetic drive sliding arc plasma discharge device, gas and the graphene enter the cyclone separation device under the action of the induced draft fan, the graphene product is collected at the bottom of the cyclone separation device, and the gas is collected in the gas collection tank.
The catalyst is one or more of the nano particles Ni, cu, pt, pd, al, niO, al 2O3.
The temperature in the catalytic pyrolysis furnace is 650-850 ℃.
The argon accounts for 90% -97% of the volume of the mixed gas of the argon and the hydrogen, and the helium accounts for 90% -97% of the volume of the mixed gas of the helium and the hydrogen.
The magnetic drive sliding arc plasma discharge device comprises a shell, a cathode, an anode, a magnetic field generator, a stainless steel screen, a direct current high-frequency high-voltage power supply and a pressure gauge, wherein the cathode is arranged in the shell and is positioned at the center of the shell, the anode is positioned at two sides of the cathode, the magnetic field generator is arranged outside the shell and generates a magnetic field to cover a reaction area, the stainless steel screen is arranged in the shell and is positioned below the cathode, the direct current high-frequency high-voltage power supply is respectively connected with the anode and the cathode, and the pressure gauge is arranged on the shell.
The invention also aims to provide a device for completing the method, which comprises an inert gas tank, more than one gasification tank, more than one catalytic pyrolysis furnace, a magnetic drive sliding arc plasma discharge device, a cyclone separation device, a draught fan and a hydrogen tank, wherein the inert gas tank and the more than one gasification tank are respectively connected with the more than one catalytic pyrolysis furnace, the catalytic pyrolysis furnace is connected with the cyclone separation device through the magnetic drive sliding arc plasma discharge device, the cyclone separation device is connected with the gas collection tank through the draught fan, and the hydrogen tank is connected with the magnetic drive sliding arc plasma discharge device.
The method has the advantages and technical effects that:
the coal tar is used as a carbon source to prepare graphene, so that the value of the coal tar can be greatly increased, the purity of a product can be improved through preliminary pyrolysis of the coal tar, a carbonization precursor is generated, the rotation speed of an arc is accelerated due to the loading effect of a magnetic field through magnetic drive sliding arc plasma, the energy density is increased, and a stable plasma region can be formed; then, various parameters in the system are regulated and controlled to generate high-quality few-layer graphene; according to the method, dangerous waste coal tar is converted into the graphene material with high added value, the carbon source is cheap and easy to obtain, the method is simple, and continuous industrial production can be realized.
Drawings
FIG. 1 is a schematic diagram of an apparatus for carrying out the method of the present invention;
FIG. 2 is a schematic diagram of a magnetic drive sliding arc plasma discharge apparatus;
In the figure: 1: an inert gas tank; 2-1: a gasification tank I; 2-2: a gasification tank II; 3: a gas flow meter; 4-1: a catalytic pyrolysis furnace I; 4-2: a catalytic pyrolysis furnace II; 5: a hydrogen tank; 6: magnetically driven sliding arc plasma generator; 7: a pressure gauge; 8: a DC high-frequency high-voltage power supply; 9: a cyclone separation device; 10: a product collection port; 11: an induced draft fan; 12: a gas collection tank; 13: a housing; 14: a cathode; 15: an anode; 16: a magnetic field generator; 17: stainless steel screen cloth.
Detailed Description
The present invention will be described in detail with reference to the following specific embodiments, but the scope of the present invention is not limited to the above description; the methods in the examples are all conventional methods unless specified otherwise, and the reagents used are all conventional commercial reagents or reagents prepared by conventional methods unless specified otherwise;
The device for carrying out the method in the following embodiment comprises an inert gas tank 1, a gasification tank I2-1, a gasification tank II 2-2, a catalytic pyrolysis furnace I4-1, a catalytic pyrolysis furnace II 4-2, a hydrogen tank 5, a magnetic drive sliding arc plasma generating device 6, a cyclone separation device 9, an induced draft fan 11 and a gas collecting tank 12; the inert gas tank 1, the gasification tank I2-1 and the gasification tank II 2-2 are respectively connected with the catalytic pyrolysis furnace I4-1 and the catalytic pyrolysis furnace II 4-2, the catalytic pyrolysis furnace I4-1 and the catalytic pyrolysis furnace II 4-2 are connected with the cyclone separation device 9 through a magnetic driving sliding arc plasma discharge device, the cyclone separation device 9 is connected with the gas collection tank 12 through a draught fan 11, and the hydrogen tank 5 is connected with the magnetic driving sliding arc plasma discharge device 6; the inert gas tank 1, the gasification tank I2-1 and the gasification tank II 2-2 are provided with gas flow meters 3 on outlet pipelines;
The magnetic drive sliding arc plasma discharging device comprises a shell 13, a cathode 14, an anode 15, a magnetic field generator 16, a direct current high-frequency high-voltage power supply 8 and a pressure gauge 7, wherein an inlet is formed in the shell 13, an outlet is formed in the lower portion of the shell, the cathode 14 is arranged in the shell and is positioned in the center of the shell, the anode 15 is an arc plate-shaped electrode and is positioned on two sides of the cathode, the magnetic field generator 16 is arranged outside the shell and generates a magnetic field to cover a reaction area, a stainless steel screen 17 is arranged in the shell and is positioned below the cathode, the direct current high-frequency high-voltage power supply 8 is respectively connected with the anode and the cathode, and the pressure gauge 7 is arranged on the shell; the magnetic field generator 4 is a permanent magnet;
Example 1
The coal tar which is a byproduct generated in the coking process of the coal accounts for 3 to 5 percent of the coal in the furnace. In recent years, coal tar is becoming a research focus on high-value materials, especially graphene; the arc discharge in various graphene preparation processes does not need substrate transfer, has high repeatability, and has good prospect in continuous industrial production.
As shown in fig. 1 and 2, in the embodiment, gasified coal tar and argon are introduced into a catalytic pyrolysis furnace I4-1 and a catalytic pyrolysis furnace II 4-2 from a gasification tank I2-1, a gasification tank II 2-2 and an inert gas tank 1 through pipelines according to the volume ratio of 10:1 for pyrolysis, wherein the mass of a nano NiO catalyst in the furnace is 54.560 g/(1L of gasified coal tar); at the pyrolysis temperature of 650 ℃, 83% of carbon atoms in coal tar are combined with a catalyst, the flow rate of inert gas is regulated to enable the reaction to stay for 20 minutes, carbonized precursor is generated, the carbonized precursor and hydrogen in a hydrogen tank 5 are led into a magnetic drive sliding arc plasma discharging device 6 together, wherein argon accounts for 90% of the volume of a mixed gas of argon and hydrogen, the magnetic drive sliding arc plasma discharging device 6 is powered by a 40Hz and 220V direct-current high-frequency high-voltage power supply 8, the magnetic field strength is 0.3T, high-density non-thermal sliding arc plasma is driven and generated by the pushing of air flow entering along the reactor and the magnetic field generated by a permanent magnet, unreacted coal tar or other large-particle amorphous carbon generated by the carbonized precursor is filtered out by a stainless steel screen 17, the graphene and the gas enter a cyclone separation device 9 together under the action of a draught fan 11, the product graphene is collected by a product collecting port 10 at the bottom of the cyclone device, and the gas generated in the reaction process is sent into a gas collecting tank 12 through the draught fan 11.
Example 2
In the embodiment, gasified coal tar and argon are sent into a catalytic pyrolysis furnace I4-1 and a catalytic pyrolysis furnace II 4-2 for pyrolysis according to the volume ratio of 15:1, wherein 48.740 g/(1L of gasified coal tar) Ni/NiO nano particles are filled in the pyrolysis furnace, the pyrolysis temperature is set to 850 ℃, the gas flow rate is regulated to ensure the residence time of the reaction to be 10 minutes, a carbonized precursor is generated, and the conversion rate of the catalyst to hydrocarbon of the coal tar is 93.5%; after the graphene is discharged out of the pipeline, the graphene is mixed with hydrogen (wherein argon accounts for 95% of the volume of a mixed gas of the argon and the hydrogen), and then is fed into a magnetic drive sliding arc plasma discharge device with the magnetic intensity of 0.3T, the magnetic drive sliding arc plasma discharge device is powered by a direct-current high-frequency high-voltage power supply with the magnetic intensity of 40Hz and 220V, carbonized precursors are decomposed in a plasma reactor, carbon atoms generate carbon clusters, the clusters are cyclized and aggregated to finally generate graphene through a hydrogen termination dangling bond, unreacted coal tar or other produced large-particle amorphous carbon is filtered by the graphene through a stainless steel screen, the graphene and the gas enter a cyclone separation device 9 together under the action of a draught fan 11, the graphene is collected at a product collecting port 10, and the gas is collected by a gas collecting tank 12.
Example 3
According to the embodiment, gasified coal tar and argon are introduced into a catalytic pyrolysis furnace I4-1 and a catalytic pyrolysis furnace II 4-2 filled with 55.130 g/(1L of gasified coal tar) of nano Al 2O3 powder according to the volume ratio of 12:1 for pyrolysis, the pyrolysis temperature is controlled at 800 ℃, the gas flow rate is regulated to ensure that the residence time of the reaction is 8 minutes, a carbonized precursor is generated, and the conversion rate of the catalyst to hydrocarbon of the coal tar is 90%; the carbonized precursor is mixed with hydrogen (wherein argon accounts for 92% of the volume of the mixed gas of the argon and the hydrogen) after exiting from a pipeline and then is fed into a magnetic drive sliding arc plasma discharge device with the magnetic strength of 0.25T, the magnetic drive sliding arc plasma discharge device is powered by a direct-current high-frequency high-voltage power supply with the magnetic strength of 40Hz and 220V, the carbonized precursor is decomposed in a plasma reactor, carbon atoms generate carbon clusters, the clusters are cyclized and aggregated to finally generate graphene through hydrogen termination dangling bonds, the graphene is filtered out of other large-particle impurities through a stainless steel screen 17, and then is jointly introduced into a cyclone separation device 9 with gas generated in the reaction process under the action of a draught fan 11, the product graphene is collected at a bottom product collecting port 10 of the cyclone separation device, and the gas generated in the reaction process is fed into a gas collecting tank 12.
Claims (5)
1. A method for continuously preparing graphene by magnetically driving sliding arc plasma high-voltage discharge is characterized by comprising the following steps of: gasifying coal tar, feeding the gasified coal tar into a catalytic pyrolysis furnace filled with argon or helium, adding nano metal or metal oxide serving as a catalyst into the pyrolysis furnace, mixing the gaseous coal tar with the catalyst to react to generate a carbonized precursor, feeding the carbonized precursor and hydrogen into a magnetic driving sliding arc plasma discharge device, generating high-density non-thermal sliding arc plasma through an auxiliary magnetic field, and converting the carbonized precursor under the action of the high-density non-thermal sliding arc plasma to generate graphene;
The catalyst is one or more of the nano particles Ni, cu, pt, pd, al, niO, al 2O3.
2. The method for continuously preparing graphene by magnetically driving sliding arc plasma high-voltage discharge according to claim 1, wherein the method comprises the following steps: the pyrolysis temperature is 650-850 ℃.
3. The method for continuously preparing graphene by magnetically driving sliding arc plasma high-voltage discharge according to claim 2, wherein the method comprises the following steps: the magnetic drive sliding arc plasma discharge device comprises a shell (13), a cathode (14), an anode (15), a magnetic field generator (16), a stainless steel screen (17), a direct current high-frequency high-voltage power supply (8) and a pressure gauge (7), wherein the cathode (14) is arranged in the shell and located at the center of the shell, the anode (15) is located at two sides of the cathode, the magnetic field generator (16) is arranged outside the shell and generates a magnetic field to cover a reaction area, the stainless steel screen (17) is arranged in the shell and located below the cathode, the direct current high-frequency high-voltage power supply (8) is connected with the anode and the cathode, and the pressure gauge (7) is arranged on the shell.
4. The method for continuously preparing graphene by magnetically driving sliding arc plasma high-voltage discharge according to claim 3, wherein the method comprises the following steps: argon accounts for 90% -97% of the volume of the mixed gas of argon and hydrogen, and helium accounts for 90% -97% of the volume of the mixed gas of helium and hydrogen.
5. A system for performing the method for continuously preparing graphene by magnetically driving sliding arc plasma high-voltage discharge as claimed in claim 4, wherein: the device comprises an inert gas tank, more than one gasification tank, more than one catalytic pyrolysis furnace, a magnetic drive sliding arc plasma discharge device, a cyclone separation device, a draught fan and a hydrogen tank, wherein the inert gas tank and the more than one gasification tank are respectively connected with the more than one catalytic pyrolysis furnace, the catalytic pyrolysis furnace is connected with the cyclone separation device through the magnetic drive sliding arc plasma discharge device, the cyclone separation device is connected with the gas collection tank through the draught fan, and the hydrogen tank is connected with the magnetic drive sliding arc plasma discharge device.
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| "煤焦油气相催化裂解生成轻质芳烃的研究";闫伦靖;《中国博士学位论文数据库 工程科技I辑》;B016-3 * |
| Dongning Li et. al.."Synrhesis of graphene flakes using a non-thermal plasma based on magnetically stabilized gliding arc discharge".《Fullerences,Nanotubes and Carbon Nanostructures》.2020,第28卷(第10期),846-856. * |
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