Porous graphitized carbon preparation device taking high-volatility coal pyrolysis gas as raw material

Abstract

The utility model discloses a porous graphitized carbon preparation device taking high-volatility coal pyrolysis gas as a raw material, and belongs to the technical field of carbon preparation. The sorting bin, the preheating bin and the deposition bin are sequentially communicated, a plurality of layers of gas screens are arranged between the sorting bin and the preheating bin, and a deposition template is arranged in the deposition bin. And the sorting bin is communicated with the deposition bin through a non-carbon-forming gas channel. And a pressure regulating valve is arranged on the non-carbon-forming gas channel. According to the device disclosed by the utility model, carbon components / non-carbon components are selectively screened, so that heat is intensively acted on carbon component gas, and the preparation energy efficiency is improved. In addition, the preheating section under the medium and low temperature conditions firstly converts the carbon-forming gas into polycyclic aromatic hydrocarbon and then deposits the polycyclic aromatic hydrocarbon into carbon, so that the highest temperature required by the reaction is reduced, and the equipment cost is reduced. And meanwhile, by utilizing the property of non-carbon-forming component gas, through physical activation and selective etching pore-forming, complete utilization of coal pyrolysis gas components is realized, and the quality of the graphitized porous carbon product is improved.

Description

Technical Field

[0001] The utility model relates to a porous graphitized carbon preparation device which takes high-volatile coal pyrolysis gas as a raw material, and belongs to the technical field of carbon preparation. Background Art

[0002] As the most abundant natural resource of carbon, coal is the preferred raw material for preparing various carbon-based materials due to its low cost and excellent structural tunability. Pyrolysis is a universal method for converting coal into various high-value functional carbon materials. During the pyrolysis process, coal undergoes a series of complex physical and chemical changes, resulting in products primarily in the form of pyrolysis gas and semi-coke / coke.

[0003] A variety of technologies have been developed to upgrade the solid main product of the pyrolysis process, namely semi-coke / coke, to achieve its upgrading and utilization. These technologies have enabled semi-coke / coke to be widely used in many fields such as adsorption, catalysis, and electrochemical energy storage.

[0004] However, the composition of coal pyrolysis gas is complex, containing a variety of non-carbon-forming components (such as CO2, CO, H2, H2O, etc.) and carbon-forming components (such as CH4, C2, C3, etc.). In traditional technologies, coal pyrolysis gas molecules decompose into carbon atoms at high temperatures, and the carbon atoms are then rearranged into carbon. When directly depositing coal pyrolysis gas as a carbon source, non-carbon-forming components will also absorb heat from the system, forming a competitive relationship with the carbon-forming components. This competition results in the carbon-forming components being unable to effectively obtain sufficient energy to decompose into carbon atoms, which in turn affects the quality of the carbon product and the energy efficiency of the system. Utility Model Content

[0005] In order to solve the problems existing in the background technology, the utility model provides a porous graphitized carbon preparation device using high-volatile coal pyrolysis gas as raw material.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a porous graphitized carbon preparation device using high-volatile coal pyrolysis gas as raw material, comprising a sorting chamber, a preheating chamber, a deposition chamber, a multi-layer gas screen filter and a deposition template; the sorting chamber, preheating chamber and deposition chamber are connected in sequence, a multi-layer gas screen filter is provided between the sorting chamber and the preheating chamber, and a deposition template is provided in the deposition chamber.

[0007] The separation chamber and the deposition chamber are connected via a non-carbon-forming gas channel.

[0008] The non-carbon-forming gas channel is provided with a pressure regulating valve.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] This utility model selectively separates the carbon-forming and non-carbon-forming gases into separate components, concentrating heat on the carbon-forming gases and improving production energy efficiency. Furthermore, the preheating stage at medium and low temperatures converts the carbon-forming gases into polycyclic aromatic hydrocarbons before depositing them into carbon, lowering the maximum reaction temperature and reducing equipment costs. Furthermore, by leveraging the properties of the non-carbon-forming gases, through physical activation and selective etching to create pores, the full utilization of the coal pyrolysis gas components is achieved, improving the quality of the graphitized porous carbon product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0012] The technical solutions of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0013] A porous graphitized carbon preparation device using high-volatile coal pyrolysis gas as raw material includes a sorting chamber 1, a preheating chamber 2, a deposition chamber 3, a multi-layer gas sieve filter 5 and a deposition template 6; the sorting chamber 1, the preheating chamber 2 and the deposition chamber 3 are connected in sequence, a multi-layer gas sieve filter 5 is provided between the sorting chamber 1 and the preheating chamber 2 (selected from Nature Sustainability, 2020, 3(9):753-760.), and a deposition template 6 is provided in the deposition chamber 3. The deposition template can be selected from MgO, Mg(OH)2, MgCO3 (selected from Fuel, 2020, 281:118782; Carbon, 2019, 155:166-175; Nano Energy, 2015, 12:657-665.); CaO / MgO, Ca(OH)2 / Mg(OH)2 (selected from Journal of Materials Chemistry A, 2021, 9(41):23607-23618; Carbon, 2023, 214:118318.)

[0014] The separation chamber 1 and the deposition chamber 3 are connected via a non-carbon-forming gas channel 4 .

[0015] The non-carbon-forming gas channel 4 is provided with a pressure regulating valve 7 .

[0016] The working process of this utility model is as follows:

[0017] S1: Pass coal pyrolysis gas into the separation bin 1 in a quantitative manner;

[0018] S2: Carbon forming components (CH4, C2 and C3) of coal pyrolysis gas enter the preheating bin 2 through the multi-layer gas filter screen 5, and non-carbon forming components (CO2, CO, H2 and H2O) are blocked by the multi-layer gas filter screen 5 and then enter the non-carbon forming gas channel 4, the whole device is configured with a gas supply device, and the whole reaction process is carried out under a continuous nitrogen atmosphere, and the nitrogen does not participate in and does not affect the carbon forming process;

[0019] S3: The carbon forming gas in the preheating bin 2 is preferentially preheated, so that carbon atoms are decomposed from the carbon forming gas and are preliminarily converted into polycyclic aromatic hydrocarbons;

[0020] S4: The carbon atoms and the polycyclic aromatic hydrocarbons enter the deposition bin 3, and under the action of the deposition template 6, the polycyclic aromatic hydrocarbons can be further connected to form high-quality graphite carbon;

[0021] S5: The rate of the non-carbon forming gas entering the deposition bin 3 and the internal and external pressure balance are controlled through the pressure regulator 7;

[0022] S6: When the non-carbon forming gas enters the deposition bin 3, the graphite carbon is etched and porous by a physical activation effect, and in addition, due to different reaction activities between crystalline carbon and amorphous carbon, some non-carbon forming gas can preferentially remove the amorphous part, further improving the quality of the porous graphitized carbon prepared based on coal pyrolysis gas.

[0023] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of equivalents of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A device for preparing porous graphitized carbon using high-volatile coal pyrolysis gas as raw material, characterized by: The invention comprises a sorting chamber (1), a preheating chamber (2), a deposition chamber (3), a multi-layer gas sieve filter (5) and a deposition template (6); the sorting chamber (1), the preheating chamber (2) and the deposition chamber (3) are sequentially connected and arranged; the multi-layer gas sieve filter (5) is arranged between the sorting chamber (1) and the preheating chamber (2); and the deposition template (6) is arranged in the deposition chamber (3).

2. The device for preparing porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 1, characterized in that: The separation chamber (1) and the deposition chamber (3) are connected via a non-carbon-forming gas channel (4).

3. The device for preparing porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 2, characterized in that: The non-carbon-forming gas channel (4) is provided with a pressure regulating valve (7).

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