Porous graphitized carbon taking high-volatility coal pyrolysis gas as raw material and preparation method of porous graphitized carbon

Abstract

The invention belongs to the technical field of deep processing of coal materials, and discloses porous graphitized carbon with high-volatility coal pyrolysis gas as a raw material and a preparation method thereof.The preparation method comprises the steps that pulverized coal with the typical coalification degree is placed in an inlet section of a horizontal tubular furnace, a template for pyrolysis gas deposition is placed in an outlet section of the horizontal tubular furnace, and the porous graphitized carbon is prepared; a gas screen for separating pulverized coal from the template is arranged between the inlet section and the outlet section of the horizontal tubular furnace, and the gas screen is used for allowing carbon forming gas to pass through; under a protective atmosphere, pyrolyzing the pulverized coal, and depositing carbon on the template after carbon forming gas generated by pyrolyzing the pulverized coal passes through the gas screen, so as to obtain a deposition product; and cleaning the deposition product, removing the template, and drying to obtain the porous graphitized carbon. According to the method, an in-situ catalysis strategy of coal pyrolysis gas is adopted, and the high-quality porous graphitized carbon material is finally obtained by controlling coal types, pyrolysis conditions and pyrolysis gas components.

Description

Technical Field

[0001] This invention belongs to the technical field of deep processing of coal materials, and particularly relates to a porous graphitized carbon using high-volatile coal pyrolysis gas as raw material and its preparation method. Background Art

[0002] As the natural carbon source with the highest carbon abundance in nature, coal has low cost and excellent structural tunability, and is an ideal raw material for preparing carbon-based materials. Pyrolysis is a general method to convert coal into various high-value functional carbon materials. After experiencing a series of complex physical / chemical changes, products mainly in the form of pyrolysis gas and semi-coke / coke are obtained. Although a variety of technologies have been developed to upgrade and utilize the solid main products, enabling them to be widely used in many application scenarios such as adsorption, catalysis, and electrochemical energy storage, the low-quality pyrolysis gas by-products are often simply directly discharged, which not only causes waste of raw materials but also is not conducive to environmental protection. Especially for medium and low-rank coals with high volatility, the mass ratio of unutilized pyrolysis gas can even be as high as 50%; therefore, developing an efficient utilization technology for coal pyrolysis gas is of great significance for improving the comprehensive utilization value of coal pyrolysis. However, limited by the complex composition of coal pyrolysis gas, there are only sporadic reports on the conversion of coal pyrolysis gas into solid carbon materials at present; in addition, when directly depositing with coal pyrolysis gas as the carbon source, some non-carbon-forming components (CO2, CO, H2, H2O, etc.) will also obtain the heat in the system, and this competitive relationship makes the carbon-forming components (CH4, C2, C3, etc.) unable to effectively obtain enough energy to decompose into carbon atoms, resulting in an increase in the energy efficiency of the system while being unfavorable to the improvement of carbon quality. Summary of the Invention

[0003] To solve the problems existing in the prior art, the purpose of this invention is to provide a porous graphitized carbon using high-volatile coal pyrolysis gas as raw material and its preparation method. This invention adopts the in-situ catalytic strategy of coal pyrolysis gas, and finally obtains high-quality porous graphitized carbon materials by controlling the coal type, pyrolysis conditions, and pyrolysis gas composition.

[0004] To achieve the above purpose, this invention adopts the following technical solutions: A preparation method of a porous graphitized carbon using high-volatile coal pyrolysis gas as raw material, including the following process: Place pulverized coal with typical coalification degree at the inlet section of a horizontal tube furnace, place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace, and a gas screen for separating the pulverized coal from the template is provided between the inlet section and the outlet section of the horizontal tube furnace, and the gas screen is used to pass the carbon-forming gas; Under a protective atmosphere, pyrolyze the pulverized coal, and the carbon-forming gas generated by the pyrolysis of the pulverized coal passes through the gas screen and deposits carbon on the template to obtain a deposition product; The deposited product is washed to remove the template and then dried to obtain porous graphitized carbon.

[0005] Preferably, the mesh number of the pulverized coal is 100 or more.

[0006] Preferably, the pulverized coal is at least one of bituminous coal, Zhundong coal and lignite.

[0007] Preferably, the preparation process of the pulverized coal includes: Crush and screen each coal with a typical degree of coalification, take the undersize, and then dry it at 105 - 115 °C for 12 - 14 h to obtain the pulverized coal.

[0008] Preferably, the template is at least one of MgO, Mg(OH)₂, MgCO₃, thermally annealed dolomite, and the product obtained by the hydration reaction of thermally annealed dolomite.

[0009] Preferably, the mass ratio of the pulverized coal to the template is (1 - 5):1.

[0010] Preferably, under a protective atmosphere, the pulverized coal is pyrolyzed, and the carbon-forming gas generated by the pyrolysis of the pulverized coal passes through the gas screen and deposits carbon on the template to obtain the deposited product. During this process, the pyrolysis temperature is 550 - 850 °C, and the pyrolysis time is 1 - 2 h.

[0011] Preferably, under a protective atmosphere, when the pulverized coal is pyrolyzed and the carbon-forming gas generated by the pyrolysis of the pulverized coal passes through the gas screen and deposits carbon on the template, the heating rate is 5 - 15 °C / min. -1 。

[0012] Preferably, washing the deposited product to remove the template and then drying it to obtain porous graphitized carbon includes: Wash the deposited product with dilute hydrochloric acid and deionized water to remove the template. After the cleaning solution becomes neutral, dry the product at 60 - 80 °C to obtain porous graphitized carbon.

[0013] The present invention also provides a porous graphitized carbon using high-volatile coal pyrolysis gas as a raw material, and this porous graphitized carbon is prepared by the above preparation method of the present invention.

[0014] The present invention has the following beneficial effects: In the preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material, the carbon obtained by deposition inherits the good porous structure characteristics of the parent template by using the template, and at the same time has a developed microcrystalline structure under the catalytic action of the template, which is beneficial to the high-end application of carbon products. Due to the catalytic action of the template, some volatile macromolecular fragments finally become the components of the solid carbon material instead of existing in the form of liquid-phase tar, reducing the harm caused by tar condensation during the pyrolysis process. In summary, the present invention adopts an in-situ catalytic strategy for coal pyrolysis gas, and finally obtains high-quality porous graphitized carbon materials by controlling the coal type, pyrolysis conditions and pyrolysis gas composition. Description of the Drawings

[0015] Figure 1(a) shows the content of CH4 in the pyrolysis gas components of different coal types (Jixi bituminous coal (JX), Zhundong coal (ZD), Baorixile lignite (BR)).

[0016] Figure 1(b) shows the content of C2-C3 in the pyrolysis gas components of different coal types (Jixi bituminous coal (JX), Zhundong coal (ZD), Baorixile lignite (BR)).

[0017] Figure 1(c) shows the content of H2 in the pyrolysis gas components of different coal types (Jixi bituminous coal (JX), Zhundong coal (ZD), Baorixile lignite (BR)).

[0018] Figure 1(d) shows the content of CO2 in the pyrolysis gas components of different coal types (Jixi bituminous coal (JX), Zhundong coal (ZD), Baorixile lignite (BR)).

[0019] Figure 1(e) shows the content of CO in the pyrolysis gas components of different coal types (Jixi bituminous coal (JX), Zhundong coal (ZD), Baorixile lignite (BR)).

[0020] Figure 1(f) is a summary diagram of the pyrolysis gas components and contents of different coal types (Jixi bituminous coal (JX), Zhundong coal (ZD), Baorixile lignite (BR)).

[0021] Figure 2(a) is the XRD diagram of the porous graphitized carbon obtained in Example 1, Example 2 and Example 3 of the present invention.

[0022] Figure 2(b) is the Raman diagram of the porous graphitized carbon obtained in Example 1, Example 2 and Example 3 of the present invention.

[0023] Figure 3(a) is the morphology diagram of the MgCO3 template used in Example 1 of the present invention.

[0024] Figure 3(b) is the morphology diagram of the MgO template used in Example 2 of the present invention.

[0025] Figure 3(c) is the morphology diagram of the Mg(OH)2 template used in Example 3 of the present invention.

[0026] Figure 3(d) is the morphology diagram of the dolomite (composition: CaO / MgO) template after thermal annealing used in Example 4 of the present invention.

[0027] Figure 3(e) is the morphology of the product (composition: Ca(OH)2 / Mg(OH)2) template obtained by the hydration reaction of the dolomite after thermal annealing used in Example 5 of the present invention. Specific embodiments

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as a raw material according to the present invention includes the following steps: Step 1: Select coal with a typical degree of coalification as the raw material, crush the raw material, and pass it through a 100-mesh sieve to obtain coal powder with a mesh size of more than 100 meshes; subsequently, dry the screened coal powder sample in an oven at 105-115 °C for 12-14 h to obtain dried coal powder. Among them, the coal with a typical degree of coalification can be at least one of bituminous coal (JX), Zhundong coal (ZD), and Baorixile lignite (BR). Referring to Figures 1(a)-1(f), it can be seen that Jixi bituminous coal (JX) has the highest content of carbon-forming gases (CH4, C2, C3) and the lowest content of non-carbon-forming gases (CO2, CO, H2), so it is most suitable as the coal-based carbon source for gas-phase carbon formation.

[0030] Step 2: Place 10 g of the dried coal powder obtained in Step 1 at the inlet section of a horizontal tube furnace, and place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace, so that a certain distance can be maintained between the coal powder and the template to ensure the full deposition of coal pyrolysis gas. A gas screen is also placed in the inner cavity of the horizontal tube furnace between the coal powder and the template, and this gas screen should ensure that only carbon-forming gases can pass through smoothly. Among them, the template can be selected from at least one of MgO, Mg(OH)2, MgCO3, heat-annealed dolomite (mainly composed of CaO and MgO, abbreviated as CaO / MgO in the following examples), and the product obtained by the hydration reaction of heat-annealed dolomite (mainly composed of Ca(OH)2 and Mg(OH)2, abbreviated as Ca(OH)2 / Mg(OH)2 in the following examples). As can be seen from Figures 3(a) - 3(e), these templates all have multi-scale morphological characteristics; the mass ratio of coal powder to template is (1 - 5):1.

[0031] Step 3: After the preparation in Step 2 is completed, under a continuous protective atmosphere of N2 flowing at 50 mL min -1 , heat the horizontal tube furnace at a heating rate of 5 - 15 °C min -1 to the deposition temperature of 550 - 850 °C and keep it for 1 - 2 h.

[0032] Step 4: After the insulation in Step 3 is completed, after the horizontal tube furnace is cooled to room temperature with the furnace, wash the deposited product with dilute hydrochloric acid and deionized water to remove the template, and then collect the obtained carbon product and dry it at 60 - 80 °C to obtain porous graphitized carbon.

[0033] Example 1 The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as the raw material in this example includes the following steps: Step 1: Select Jixi bituminous coal (JX) as the raw material, crush the raw material and pass it through a 100-mesh sieve to obtain coal powder with a mesh size of more than 100 meshes; subsequently, dry the sieved coal powder sample in an oven at 110 °C for 12 h to obtain dried coal powder.

[0034] Step 2: Place 10 g of the dried coal powder obtained in Step 1 at the inlet section of a horizontal tube furnace, and place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace, so that a certain distance can be maintained between the coal powder and the template to ensure the full deposition of coal pyrolysis gas. A gas screen is also placed in the inner cavity of the horizontal tube furnace between the coal powder and the template, and this gas screen should ensure that only carbon-forming gases can pass through smoothly. Among them, the template is MgCO3; the mass ratio of coal powder to template is 3:1.

[0035] Step 3: After the preparation in Step 2 is completed, under a continuous protective atmosphere of N2 flowing at 50 mL min -1Under a continuous protective atmosphere of N2, the horizontal tube furnace was heated at a heating rate of 10 °C min -1 to the deposition temperature of 850 °C and held for 1 h.

[0036] Step 4: After the insulation in Step 3 was completed, the horizontal tube furnace was cooled to room temperature with the furnace, and the deposited product was washed with dilute hydrochloric acid and deionized water to remove the template. Then, the obtained carbon product was collected and dried at 80 °C to obtain porous graphitized carbon.

[0037] Referring to Fig. 2(a), it can be seen that the XRD peak intensity of the obtained porous graphitized carbon is the highest, indicating a deeper degree of graphitization; referring to Fig. 2(b), I d / I g is the smallest, indicating the least defective structure. The specific surface area of the porous graphitized carbon obtained in this example is 552.0 m 2 g -1 .

[0038] Example 2 The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material in this example includes the following steps: Step 1: Select Jixi bituminous coal (JX) as the raw material, crush the raw material and pass it through a 100-mesh sieve to obtain coal powder with a mesh size of more than 100 meshes; subsequently, dry the sieved coal powder sample in an oven at 110 °C for 12 h to obtain dried coal powder.

[0039] Step 2: Place 10 g of the dried coal powder obtained in Step 1 at the inlet section of the horizontal tube furnace, and place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace, so that a certain distance can be maintained between the coal powder and the template to ensure that the coal pyrolysis gas can be fully deposited. A gas screen is also placed in the inner cavity of the horizontal tube furnace between the coal powder and the template, and this gas screen should ensure that only the carbon-forming gas can pass through smoothly. Among them, the template is MgO; the mass ratio of the coal powder to the template is 3:1.

[0040] Step 3: After Step 2 is prepared, under a continuous protective atmosphere of N2 at 50 mL min -1 the horizontal tube furnace was heated at a heating rate of 10 °C min -1 to the deposition temperature of 750 °C and held for 100 min.

[0041] Step 4: After the insulation in Step 3 was completed, the horizontal tube furnace was cooled to room temperature with the furnace, and the deposited product was washed with dilute hydrochloric acid and deionized water to remove the template. Then, the obtained carbon product was collected and dried at 80 °C to obtain porous graphitized carbon.

[0042] Referring to Fig. 2(a), it shows that the graphitization degree of the porous graphitized carbon obtained in this example is relatively good; referring to Fig. 2(b), it shows that the defective structure of the porous graphitized carbon obtained in this example is less. The specific surface area of the porous graphitized carbon obtained in this example is 935.0 m 2 g -1 .

[0043] Example 3 The preparation method of the porous graphitized carbon using the pyrolysis gas of high-volatile coal as the raw material in this example includes the following steps: Step 1: Select Jixi bituminous coal (JX) as the raw material, crush the raw material and pass it through a 100-mesh sieve to obtain coal powder with a mesh size of more than 100 meshes; subsequently, dry the sieved coal powder sample in an oven at 110 °C for 12 h to obtain dried coal powder.

[0044] Step 2: Place 10 g of the dried coal powder obtained in Step 1 at the inlet section of a horizontal tube furnace, and place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace, so that a certain distance can be maintained between the coal powder and the template to ensure that the coal pyrolysis gas can be fully deposited. A gas screen is also placed in the inner cavity of the horizontal tube furnace between the coal powder and the template, and this gas screen should ensure that only the carbon-forming gas can pass through smoothly. Among them, the template is Mg(OH)2; the mass ratio of the coal powder to the template is 3:1.

[0045] Step 3: After Step 2 is prepared, under a continuous protective atmosphere of N2 flow at 50 mL min -1 , heat the horizontal tube furnace to the deposition temperature of 650 °C at a heating rate of 10 °C min -1 and keep it warm for 90 min.

[0046] Step 4: After the insulation in Step 3 is completed, when the horizontal tube furnace cools down to room temperature with the furnace, wash the deposited product with dilute hydrochloric acid and deionized water to remove the template, and then collect the obtained carbon product and dry it at 80 °C to obtain porous graphitized carbon.

[0047] Referring to Fig. 2(a), it shows that the graphitization degree of the porous graphitized carbon obtained in this example is relatively good; referring to Fig. 2(b), it shows that the defective structure of the porous graphitized carbon obtained in this example is less. The specific surface area of the porous graphitized carbon obtained in this example is 780.0 m 2 g -1 .

[0048] Example 4 The preparation method of the porous graphitized carbon using the pyrolysis gas of high-volatile coal as the raw material in this example includes the following steps: Step 1: Select Jixi bituminous coal (JX) as the raw material, crush the raw material and pass it through a 100-mesh sieve to obtain pulverized coal with a mesh size of over 100 meshes. Subsequently, dry the sieved pulverized coal sample in an oven at 110 °C for 12 h to obtain dried pulverized coal.

[0049] Step 2: Place 10 g of the dried pulverized coal obtained in Step 1 at the inlet section of a horizontal tube furnace, and place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace, so that a certain distance can be maintained between the pulverized coal and the template to ensure that the coal pyrolysis gas can be fully deposited. A gas sieve is also placed in the inner cavity of the horizontal tube furnace between the pulverized coal and the template, and this gas sieve should ensure that only the carbon-forming gas can pass through smoothly. Among them, the template is CaO / MgO; the mass ratio of the pulverized coal to the template is 3:1.

[0050] Step 3: After Step 2 is prepared, under a continuous protective atmosphere of N2 flowing at 50 mL min -1 , heat the horizontal tube furnace to the deposition temperature of 550 °C at a heating rate of 10 °C min -1 and keep it for 2 h.

[0051] Step 4: After the insulation in Step 3 is completed, when the horizontal tube furnace cools down to room temperature with the furnace, wash the deposited product with dilute hydrochloric acid and deionized water to remove the template, and then collect the obtained carbon product and dry it at 80 °C to obtain porous graphitized carbon.

[0052] Under the dual pore-forming action of CaO / MgO, the specific surface area of the porous graphitized carbon obtained in this example is 630.0 m 2 g -1 .

[0053] Example 5 The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as the raw material in this example includes the following steps: Step 1: Select Jixi bituminous coal (JX) as the raw material, crush the raw material and pass it through a 100-mesh sieve to obtain pulverized coal with a mesh size of over 100 meshes. Subsequently, dry the sieved pulverized coal sample in an oven at 105 °C for 14 h to obtain dried pulverized coal.

[0054] Step 2: Place 10 g of the dried pulverized coal obtained in Step 1 at the inlet section of a horizontal tube furnace, and place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace, so that a certain distance can be maintained between the pulverized coal and the template to ensure that the coal pyrolysis gas can be fully deposited. A gas sieve is also placed in the inner cavity of the horizontal tube furnace between the pulverized coal and the template, and this gas sieve should ensure that only the carbon-forming gas can pass through smoothly. Among them, the template is Ca(OH)2 / Mg(OH)2; the mass ratio of the pulverized coal to the template is 1:1.

[0055] Step 3: After the preparation in Step 2 is completed, under a continuous protective atmosphere of N2 at 50 mL / min -1 , heat the horizontal tube furnace at a heating rate of 12 °C / min -1 to the deposition temperature of 800 °C and hold for 80 min.

[0056] Step 4: After the holding in Step 3 is completed, when the horizontal tube furnace cools down to room temperature with the furnace, wash the deposited product with dilute hydrochloric acid and deionized water to remove the template, then collect the obtained carbon product and dry it at 70 °C to obtain porous graphitized carbon.

[0057] Driven by high temperature, Ca(OH)2 / Mg(OH)2 acts as a template and shows good pore-forming effect. The specific surface area of the porous graphitized carbon obtained in this example is 1270.0 m 2 g -1 .

[0058] Example 6 The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material in this example includes the following steps: Step 1: Select Zhundong coal (ZD) as raw material, crush the raw material and pass it through a 100-mesh sieve to obtain coal powder with a mesh size of over 100 meshes; subsequently, dry the screened coal powder sample in an oven at 115 °C for 12 h to obtain dried coal powder.

[0059] Step 2: Place 10 g of the dried coal powder obtained in Step 1 at the inlet section of the horizontal tube furnace, place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace, so that a certain distance can be maintained between the coal powder and the template to ensure that the coal pyrolysis gas can be fully deposited, and a gas sieve is also placed in the inner cavity of the horizontal tube furnace between the coal powder and the template, and this gas sieve should ensure that only the carbon-forming gas can pass through smoothly. Among them, the template is MgCO3; the mass ratio of coal powder to template is 5:1.

[0060] Step 3: After the preparation in Step 2 is completed, under a continuous protective atmosphere of N2 at 50 mL / min -1 , heat the horizontal tube furnace at a heating rate of 5 °C / min -1 to the deposition temperature of 550 °C and hold for 2 h.

[0061] Step 4: After the holding in Step 3 is completed, when the horizontal tube furnace cools down to room temperature with the furnace, wash the deposited product with dilute hydrochloric acid and deionized water to remove the template, then collect the obtained carbon product and dry it at 60 °C to obtain porous graphitized carbon.

[0062] The specific surface area of the porous graphitized carbon obtained in this example is 542.5 m 2 g -1 .

[0063] Example 7 The preparation method of porous graphitized carbon using the pyrolysis gas of high-volatile coal as raw material in this example includes the following steps: Step 1: Select Baorixile lignite (BR) as the raw material, crush the raw material and pass it through a 100-mesh sieve to obtain coal powder with a mesh size of more than 100 meshes. Subsequently, dry the sieved coal powder sample in an oven at 110 °C for 12 h to obtain dried coal powder.

[0064] Step 2: Place 10 g of the dried coal powder obtained in Step 1 at the inlet section of a horizontal tube furnace, and place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace, so that a certain distance can be maintained between the coal powder and the template to ensure that the coal pyrolysis gas can be fully deposited. A gas screen is also placed in the inner cavity of the horizontal tube furnace between the coal powder and the template, and this gas screen should ensure that only the carbon-forming gas can pass through smoothly. Among them, the template uses MgCO3; the mass ratio of coal powder to template is 4:1.

[0065] Step 3: After Step 2 is prepared, under a continuous protective atmosphere of N2 flowing at 50 mL / min, heat the horizontal tube furnace to the deposition temperature of 600 °C at a heating rate of 8 °C / min and hold for 2 h. -1 -1

[0066] Step 4: After the insulation in Step 3 is completed, when the horizontal tube furnace is cooled to room temperature with the furnace, wash the deposited product with dilute hydrochloric acid and deionized water to remove the template, and then collect the obtained carbon product and dry it at 60 °C to obtain porous graphitized carbon.

[0067] The specific surface area of the porous graphitized carbon obtained in this example is 650.8 m 2 / g -1 .

[0068] Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0069] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or make equivalent replacements, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered within the scope of the present invention.​​

Claims

1. A preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as a raw material, characterized in that, It includes the following processes: Place pulverized coal with typical coalification degree at the inlet section of a horizontal tube furnace, and place the template for pyrolysis gas deposition at the outlet section of the horizontal tube furnace. A gas screen for separating the pulverized coal from the template is provided between the inlet section and the outlet section of the horizontal tube furnace, and the gas screen is used to pass carbon-forming gas; Under a protective atmosphere, pyrolyze the pulverized coal. The carbon-forming gas generated by the pyrolysis of the pulverized coal passes through the gas screen and deposits carbon on the template to obtain a deposition product; Wash the deposition product, remove the template, and then dry it to obtain porous graphitized carbon.

2. The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 1, characterized in that, The mesh number of the pulverized coal is above 100.

3. The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 1, characterized in that, The pulverized coal uses at least one of bituminous coal, Zhundong coal, and lignite.

4. The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 1, characterized in that, The preparation process of the pulverized coal includes: Crush and screen each with typical coalification degree, take the undersize, and then dry it at 105-115 °C for 12-14 h to obtain the pulverized coal.

5. The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 1, characterized in that, The template uses at least one of MgO, Mg(OH)2, MgCO3, heat-annealed dolomite, and the product obtained by the hydration reaction of heat-annealed dolomite.

6. The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 1, characterized in that, The mass ratio of the pulverized coal to the template is (1-5):

1.

7. The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 1, characterized in that, Under a protective atmosphere, when pyrolyzing the pulverized coal, and the carbon-forming gas generated by the pyrolysis of the pulverized coal passes through the gas screen and deposits carbon on the template to obtain a deposition product, the pyrolysis temperature is 550-850 °C and the pyrolysis time is 1-2 h.

8. The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 1, characterized in that, Under a protective atmosphere, during the process of pyrolyzing pulverized coal and depositing carbon on a template after the carbon-forming gas generated by the pyrolysis of the pulverized coal passes through a gas sieve, the heating rate is 5-15 °C min -1 .

9. The preparation method of porous graphitized carbon using high-volatile coal pyrolysis gas as raw material according to claim 1, characterized in that, Washing the deposition product, removing the template, and then drying it to obtain porous graphitized carbon includes: Wash the deposition product with dilute hydrochloric acid and deionized water to remove the template. After the cleaning solution becomes neutral, dry the product at 60-80 °C to obtain porous graphitized carbon.

10. A porous graphitized carbon using high-volatile coal pyrolysis gas as a raw material, characterized in that, This porous graphitized carbon is prepared by the preparation method according to any one of claims 1-9.

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