Plasma-based catalyst integrated continuous production device and method

Abstract

The invention provides a plasma-based catalyst integrated continuous production device and method.The continuous production device comprises a feeder, a horizontal stirrer, an extruder and a closed box, and the closed box is connected with the extruder through an extrusion pipeline; the extrusion pipeline penetrates into the closed box body, a high-melting-point conductive rod is further arranged in the closed box body, a negative electrode connected with a power supply is connected with the extrusion pipeline, and a positive electrode is connected with the high-melting-point conductive rod; the collector is provided with a second discharge port and is communicated with the closed box body through the second discharge port; and a negative pressure fan is arranged on one side of the collector. According to the preparation method, the problems that the preparation process is complex, tedious and incapable of being continuous due to the fact that modification dispersion of the carbon nano tube and uniform loading of nano particles on the surface of the carbon nano tube are difficult to realize at the same time are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of nanomaterial preparation, and particularly to a continuous production device and method for integrating a catalyst based on plasma. Background Art

[0002] Disclosing the information of this background art section is only intended to increase some understanding of the overall background of the present disclosure, and it is not necessarily regarded as an admission or an implication in any form that this information constitutes the prior art already known to those of ordinary skill in the art.

[0003] Green energy storage and conversion devices represented by lithium-ion batteries, fuel cells, etc. have been widely studied. As the main component of the device, the performance of the electrode material will greatly affect the power density and conversion efficiency of the battery. Synthesizing high-performance electrode materials is of great significance for promoting energy transformation and the development of the green energy industry.

[0004] Among many electrode materials, as an auxiliary material, carbon nanotubes have excellent thermal, electrical, and mechanical properties, strong metal-support interaction, and specific catalytic properties due to radial conduction, and are regarded as ideal carrier materials for application in green energy storage and conversion devices such as lithium-ion batteries and fuel cells. However, due to their large aspect ratio, van der Waals forces, and electrostatic interactions, carbon nanotubes are prone to agglomeration, which affects their excellent intrinsic properties. Achieving the modification and dispersion of carbon nanotubes is a necessary prerequisite for promoting their efficient application. In addition, the smooth surface structure of carbon nanotubes and the lack of active sites on the surface affect the uniform loading of nanoparticles, easily causing agglomeration of nanoparticles, and thus affecting the electrochemical performance of the material. How to achieve high dispersion and uniform loading of nanoparticles on the carbon nanotube carrier is another key issue affecting the performance of carbon nanotube-based composite materials.

[0005] In response to the above problems, current research has proposed various carbon nanotube modification and dispersion methods, including ball milling, ultrasonic oscillation, plasma modification and dispersion with chemical dispersants, etc. In addition, in terms of nanoparticle loading, various nanoparticle loading methods have also been proposed, including impregnation method, hydrothermal method, microwave method, chemical deposition method, etc. However, the modification and dispersion of carbon nanotubes and the loading of nanoparticles are often carried out step by step and require the use of multiple chemical reagents, resulting in a complex and cumbersome material preparation process.

[0006] In view of this, the present application is specifically proposed. Summary of the Invention

[0007] To solve one of the above technical defects, the object of the present invention is to provide a continuous production device integrating a catalyst based on plasma, which solves the problems in the background art such as the complex and cumbersome preparation process caused by the difficulty in simultaneously realizing the modification and dispersion of carbon nanotubes and the uniform loading of nanoparticles on the surface of carbon nanotubes, and the inability to achieve continuous production. At the same time, a continuous production method integrating a catalyst based on plasma is proposed.

[0008] According to the first aspect of the embodiments of the present application, a continuous production device integrating a catalyst based on plasma is provided, including:

[0009] A feeder, provided with a first feed port and a first discharge port;

[0010] A horizontal mixer, connected to the first discharge port of the feeder;

[0011] An extruder, connected to the horizontal mixer;

[0012] A closed box, connected to the extruder through an extrusion pipeline; the extrusion pipeline extends into the interior of the closed box, and a high-melting-point conductive rod is further provided inside the closed box, connected to the negative electrode of the power supply and connected to the extrusion pipeline, and the positive electrode is connected to the high-melting-point conductive rod;

[0013] A collector, provided with a second discharge port, and connected to the closed box through the second discharge port; a negative pressure blower is provided on one side of the collector.

[0014] Preferably, it further includes:

[0015] An insulation blocking device, arranged on the extrusion pipeline, for controlling the electrical conductivity at both ends of the extrusion pipeline.

[0016] Preferably, the insulation blocking device (5) is used to block the current connection with the front-end equipment feeder (1), horizontal mixer (2) and extruder (3) after the power supply (7) is turned on, ensuring safe operation.

[0017] Preferably, the feeder is used to transfer carbon nanotubes, nitrogen-containing compounds or phosphorus-containing compounds, transition metal salts, deionized water or ethanol into the horizontal mixer.

[0018] Preferably, the material extruded by the extruder is a semi-fluid solid-liquid mixture; and it is transferred to the closed box through the extrusion pipeline.

[0019] Preferably, it further includes:

[0020] An air storage tank, connected to the closed box through a connecting pipe; a flow meter is provided between the air storage tank and the closed box; a pressure gauge is further provided on the closed box.

[0021] Preferably, a preset distance is provided between the high melting point conductive rod and the outlet of the extrusion pipe.

[0022] According to another aspect of the present application, a continuous production method for plasma-based catalyst integration is provided. Using the above-mentioned continuous production device for plasma-based catalyst integration, it includes the following steps:

[0023] Transfer carbon nanotubes, nitrogen-containing compounds or phosphorus-containing compounds, transition metal salts, deionized water or ethanol to a horizontal mixer through a feeder for thorough and uniform stirring;

[0024] The extruder extrudes the materials evenly stirred by the horizontal mixer into a semi-fluid state of solid-liquid mixture, and transfers it to a closed box through an extrusion pipe;

[0025] Start the power supply, and an arc plasma is generated between the semi-fluid state of the solid-liquid mixture at the outlet end of the extrusion pipe and the high melting point conductive rod; under the action of the plasma, the doping modification of the carbon nanotube surface and the loading of nanoparticles on the carbon nanotube surface are carried out simultaneously;

[0026] The negative pressure fan collects the dispersed mist in the closed box into a collector.

[0027] Preferably, the atmosphere and different atmosphere ratios in the closed box are controlled by a gas storage tank and a flow meter, and the pressure is monitored by a pressure gauge.

[0028] Preferably, when the semi-fluid state of the solid-liquid mixture is transferred to the closed box through the extrusion pipe, it is necessary to ensure that the material does not fall out of the outlet of the extrusion pipe.

[0029] Advantages of the present application:

[0030] (1) The continuous production device and method for plasma-based catalyst integration of the present invention can realize the integration and continuity of the carbon nanotube modification dispersion and nanoparticle loading processes through the synergistic combination of materials and the collaborative work of each component. At the same time, the prepared materials can be collected in a timely manner, solving the problems of complex and cumbersome preparation processes and inability to be continuous caused by the difficulty of simultaneously realizing the modification dispersion of carbon nanotubes and the uniform loading of nanoparticles on the carbon nanotube surface. Description of the Drawings

[0031] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0032] Figure 1 It is a schematic diagram of the continuous production device in the embodiment of the present application.

[0033] Reference numerals: 1 - feeder; 2 - horizontal mixer; 3 - extruder; 4 - extrusion pipe; 5 - insulation blocking device; 6 - closed box; 7 - power supply; 8 - high melting point conductive rod; 9 - pressure gauge; 10 - gas storage tank; 11 - flowmeter; 12 - collector; 13 - negative pressure fan. Detailed implementation

[0034] In order to make the technical solutions and advantages in the embodiments of the present application clearer, the following further details the exemplary embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0035] As an implementation manner of the present application, this embodiment provides a continuous production device for plasma-based catalyst integration, mainly composed of a feeder 1, a horizontal mixer 2, an extruder 3, an extrusion pipe (4), an insulation blocking device 5, a closed box 6, a power supply 7, a high melting point conductive rod 8, a pressure gauge 9, a gas storage tank (10), a flowmeter 11, a collector 12, and a negative pressure fan 13.

[0036] In specific implementation, the feeder 1 is provided with a first feed port and a first discharge port; the horizontal mixer 2 is communicated with the first discharge port of the feeder 1; the extruder 3 is connected to the horizontal mixer 2;

[0037] The closed box 6 is connected to the extruder 3 through the extrusion pipe 4; the extrusion pipe 4 extends into the interior of the closed box 6, and a high melting point conductive rod 8 is further arranged inside the closed box 6, and is connected to the negative electrode of the power supply 7 and connected to the extrusion pipe 4, and the positive electrode is connected to the high melting point conductive rod 8;

[0038] The collector 12 is provided with a second discharge port and is communicated with the closed box 6 through the second discharge port; a negative pressure fan 13 is arranged on one side of the collector 12.

[0039] On the basis of the above solution, the insulation blocking device 5 is arranged on the extrusion pipe 4 to control the electrical conductivity at both ends of the extrusion pipe 4.

[0040] As a specific implementation manner, the insulation blocking device 5 is used to block the current connection between the feeder 1, the horizontal mixer 2 and the extruder 3 of the front-end equipment after the power supply 7 is turned on, so as to ensure the operation safety. It has been publicly available on the market, so it will not be elaborated in detail herein.

[0041] On the basis of the above solution, the feeder 1 is used to transfer carbon nanotubes, nitrogen-containing compounds or phosphorus-containing compounds, transition metal salts, deionized water or ethanol into the horizontal mixer 2.

[0042] On the basis of the above solution, the material extruded by the extruder 3 is a solid-liquid mixture in a semi-fluid state; and it is transferred to the closed box body 6 through the extrusion pipeline 4.

[0043] On the basis of the above solution, the gas storage tank 10 is connected to the closed box body 6 through a connecting pipe; a flow meter 11 is provided between the gas storage tank 10 and the closed box body 6; and a pressure gauge 9 is also provided on the closed box body 6.

[0044] On the basis of the above solution, a preset distance is provided between the high-melting-point conductive rod 8 and the outlet of the extrusion pipeline 4.

[0045] The embodiment of the present application also provides a continuous production method for plasma-based catalyst integration, including the following steps:

[0046] (1) Transfer carbon nanotubes, nitrogen-containing compounds or phosphorus-containing compounds, transition metal salts, deionized water or ethanol to the horizontal mixer 2 through the feeder 1 for thorough stirring and mixing;

[0047] (2) The extruder 3 extrudes the materials evenly stirred by the horizontal mixer 2 into a solid-liquid mixture in a semi-fluid state, and transfers it to the closed box body 6 through the extrusion pipeline 4;

[0048] (3) Start the power supply 7, and an arc plasma is generated between the semi-fluid state solid-liquid mixture at the outlet end of the extrusion pipeline 4 and the high-melting-point conductive rod 8; under the action of the plasma, the doping modification of the carbon nanotube surface and the loading of nanoparticles on the carbon nanotube surface are carried out simultaneously;

[0049] (4) The negative pressure fan 13 collects the dispersed mist in the closed box body 6 into the collector 12.

[0050] Specifically, the atmosphere and different atmosphere ratios in the closed box body 6 are controlled by the gas storage tank 10 and the flow meter 11, and the pressure is monitored by the pressure gauge 9.

[0051] Specifically, when the solid-liquid mixture in a semi-fluid state is transferred to the closed box body 6 through the extrusion pipeline 4, it is necessary to ensure that the material does not fall out of the outlet of the extrusion pipeline 4.

[0052] In summary, during use, the carbon nanotubes, nitrogen-containing compounds or phosphorus-containing compounds, transition metal salts, deionized water or ethanol are transferred to the horizontal mixer 2 by the feeder 1 for thorough mixing. Then, they are extruded into a semi-fluid solid-liquid mixture by the extruder 3 and transferred to the closed box 6 through the extrusion pipe 4, ensuring that the material does not fall out of the outlet of the extrusion pipe 4. The outlet end of the extrusion pipe 4 is connected to the negative electrode of the power supply 7, and the high-melting-point conductive rod 8 is connected to the positive electrode of the power supply 7, and the distance between the high-melting-point conductive rod 8 and the outlet of the extrusion pipe 4 is 2-5 cm. Then, the extrusion pipe 4 is electrically isolated from the extruder 3, the horizontal mixer 2, and the feeder 1 by the insulation blocking device 5. The atmosphere and different atmosphere ratios in the closed box 6 are controlled by the gas storage tank 10 and the flow meter 11, and the pressure is monitored by the pressure gauge 9. After that, the power supply 7 is turned on, and an arc plasma is generated between the mixed material at the outlet end of the extrusion pipe 4 and the high-melting-point conductive rod 8. Under the action of the plasma, the deionized water or ethanol in the mixed material rapidly vaporizes due to heat to generate an expansion force. The carbon nanotubes are dispersed under the action of the expansion force and heat, and at the same time, their structure is damaged to a certain extent. The nitrogen-containing compounds or phosphorus-containing compounds and transition metal salts are pyrolyzed to form nanoparticles loaded on the surface of the carbon nanotubes. The nitrogen and phosphorus heteroatoms are successfully doped and modified on the surface of the carbon nanotubes due to the damage of the carbon nanotube structure, and the whole process is achieved simultaneously. The obtained material is collected in the collector 12 by the negative pressure fan 13.

[0053] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these changes and modifications.

Claims

1. A continuous production device integrating a plasma-based catalyst, characterized in that, Including: A feeder (1) is provided with a first feed inlet and a first discharge outlet; A horizontal mixer (2) is connected to the first discharge outlet of the feeder (1); An extruder (3) is connected to the horizontal mixer (2); A closed box body (6) is connected to the extruder (3) through an extrusion pipeline (4); the extrusion pipeline (4) extends into the interior of the closed box body (6), and a high melting point conductive rod (8) is further arranged inside the closed box body (6), connected to the negative electrode of a power supply (7) and connected to the extrusion pipeline (4), and the positive electrode is connected to the high melting point conductive rod (8); A collector (12) is provided with a second discharge outlet and is connected to the closed box body (6) through the second discharge outlet; a negative pressure fan (13) is arranged on one side of the collector (12).

2. The continuous production device for plasma-based catalyst integration according to claim 1, characterized in that, It further includes: An insulation blocking device (5) is arranged on the extrusion pipeline (4) for controlling the electrical conductivity at both ends of the extrusion pipeline (4).

3. The continuous production device for plasma-based catalyst integration according to claim 2, characterized in that, The insulation blocking device (5) is used to block the current connection between the feeder (1), the horizontal mixer (2) and the extruder (3) of the front-end equipment after the power supply (7) is turned on, ensuring safe operation.

4. The continuous production device for plasma-based catalyst integration according to claim 1, wherein The feeder (1) is used to transfer carbon nanotubes, nitrogen-containing compounds or phosphorus-containing compounds, transition metal salts, deionized water or ethanol into the horizontal mixer (2).

5. The continuous production device for plasma-based catalyst integration according to claim 1, wherein The material extruded by the extruder (3) is a semi-fluid state solid-liquid mixture; and it is transferred to the closed box body (6) through the extrusion pipeline (4).

6. The continuous production device for plasma-based catalyst integration according to claim 1, characterized in that, It further includes: An air storage tank (10) is connected to the closed box body (6) through a connecting pipe; a flow meter (11) is arranged between the air storage tank (10) and the closed box body (6); a pressure gauge (9) is further arranged on the closed box body (6).

7. The continuous production device for plasma-based catalyst integration according to claim 1, characterized in that, The distance between the high melting point conductive rod (8) and the outlet of the extrusion pipeline (4) is a preset distance.

8. A continuous production method for plasma-based catalyst integration, characterized in that, Using the continuous production device for plasma-based catalyst integration according to any one of claims 1-7, the following steps are included: Transfer carbon nanotubes, nitrogen-containing compounds or phosphorus-containing compounds, transition metal salts, deionized water or ethanol into the horizontal mixer (2) through the feeder (1) and stir evenly; The extruder (3) extrudes the evenly stirred material in the horizontal mixer (2) into a semi-fluid state solid-liquid mixture and transfers it to the closed box body (6) through the extrusion pipeline (4); Start the power supply (7), and an arc plasma is generated between the semi-fluid state solid-liquid mixture at the outlet end of the extrusion pipeline (4) and the high melting point conductive rod (8); under the action of the plasma, the doping modification of the carbon nanotube surface and the loading of nanoparticles on the carbon nanotube surface are carried out simultaneously; The negative pressure fan (13) collects the dispersed mist in the closed box body (6) into the collector (12).

9. The continuous production method for plasma-based catalyst integration according to claim 8, wherein The atmosphere and different atmosphere ratios in the closed box (6) are controlled by the gas storage tank (10) and the flowmeter (11), and the pressure is monitored by the pressure gauge (9).

10. The continuous production method for plasma-based catalyst integration according to claim 8, characterized in that, When the semi-fluid solid-liquid mixture is transferred to the closed box (6) through the extrusion pipe (4), it is necessary to ensure that the material does not fall out of the outlet of the extrusion pipe (4).

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