Carbon dioxide adsorption material and preparation method thereof

Abstract

The invention provides a carbon dioxide adsorption material and a preparation method thereof, and the preparation method comprises the following steps: placing a porous adsorption material in an environment containing gaseous organic amine, standing for 24-48 h, and taking out to obtain the carbon dioxide adsorption material, wherein the porous adsorption material is selected from at least one of a silicon-based adsorption material, a carbon-based adsorption material, a metal organic framework adsorption material and a covalent organic framework; and the organic amine is selected from at least one of monoethanolamine, diethanolamine, N-methyldiethanolamine, 2-amino-2-methyl-1-propanol, triethylene tetramine and diethylenetriamine. The preparation method of the carbon dioxide adsorption material provided by the invention has the advantages of simplicity in operation, low energy consumption, small dosage of organic amine and no secondary pollution; the obtained carbon dioxide adsorption material has excellent low-temperature renewability and long cycle stability.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide capture, and in particular to a carbon dioxide adsorption material and a preparation method thereof. Background Art

[0002] In the field of carbon dioxide capture technology, the main methods include physical adsorption and chemical absorption. Physical adsorption relies on the adsorption of carbon dioxide molecules by porous adsorption materials. Studies have shown that the pore size range of adsorption materials suitable for gas adsorption is 1.7-3.0 times the size of gas molecules. Since the molecular dynamics diameter of carbon dioxide is 0.33 nm, the pore size range suitable for carbon dioxide adsorption is relatively narrow. In order to further improve the adsorption performance of adsorption materials for carbon dioxide, there are also studies on modifying adsorption materials by impregnating them with organic amines. The impregnation modification includes processes such as filtration and drying, and there is a large amount of organic amine loss. Chemical absorption relies on the chemical reaction between organic amines and carbon dioxide, and then relies on heating to break the chemical bonds, thereby achieving the capture of carbon dioxide. However, problems such as secondary pollution of organic amines and high regeneration energy consumption during the absorption process cannot be ignored. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention provides a method for preparing a carbon dioxide adsorbent material with simple operation, low energy consumption, small amount of organic amine and no secondary pollution, and a carbon dioxide adsorbent material obtained by the method; the specific invention contents are as follows: In a first aspect, the present invention provides a method for preparing a carbon dioxide adsorbent material, the preparation method comprising: The porous adsorption material is placed in an environment containing gaseous organic amine, left to stand for 24-48 hours, and then taken out to obtain the carbon dioxide adsorption material; wherein, The porous adsorption material is selected from at least one of a silicon-based adsorption material, a carbon-based adsorption material, a metal organic framework adsorption material and a covalent organic framework; The organic amine is selected from at least one of monoethanolamine, diethanolamine, N-methyldiethanolamine, 2-amino-2-methyl-1-propanol, triethylenetetramine and diethylenetriamine.

[0004] Optionally, in the carbon dioxide adsorbent material, the loading amount of the organic amine is 5%-20%.

[0005] Optionally, the silicon-based adsorption material is selected from MCM-41; and / or The carbon-based adsorption material is selected from CMK-3; and / or The organic metal framework is selected from the organic metal framework ZIF-8; and / or The covalent organic framework is selected from COF-105.

[0006] Optionally, the method uses a closed container with a porous movable baffle disposed therein, and the gaseous organic amine is produced by volatilization of the organic amine, and the method comprises: The organic amine is placed at the bottom of a sealed container, the porous adsorption material is placed on the porous movable partition, the sealed container is sealed, and after standing for 24-48 hours, the solid material on the porous partition is taken out to obtain the carbon dioxide adsorption material.

[0007] Optionally, the sealed container is left to stand at 20-45° C. for 24-48 h.

[0008] Optionally, the method is carried out using a fixed bed adsorption device, the fixed bed adsorption device comprises a gas tank, a bubbling tower and an adsorption tower which are connected in sequence, the bubbling tower is filled with an organic amine liquid, and the reaction tube of the adsorption tower is filled with the porous adsorption material, and the method comprises: The gas tank is opened, and the gas in the gas tank enters from the gas inlet of the bubbling tower. The gas containing the gaseous organic amine drawn out from the gas outlet of the bubbling tower is sent into the reaction tube of the adsorption tower, so that the porous adsorption material adsorbs the gaseous organic amine in the gas to form the carbon dioxide adsorption material.

[0009] Optionally, the gas in the gas tank is air or nitrogen.

[0010] Optionally, the flow rate of the gas in the gas tank is 50-100 mL / min.

[0011] Optionally, the temperature in the adsorption tower is 25-30°C.

[0012] In a second aspect, the present invention provides a carbon dioxide adsorbent material obtained by the preparation method described in the first aspect.

[0013] Compared with the prior art, the present invention has the following advantages: The present invention provides a method for preparing a carbon dioxide adsorbent material, the method comprising: placing a porous adsorbent material in an environment containing a gaseous organic amine, standing for 24-48 hours and taking it out to obtain the carbon dioxide adsorbent material; wherein the porous adsorbent material is selected from at least one of a silicon-based adsorbent material, a carbon-based adsorbent material, a metal organic framework adsorbent material and a covalent organic framework; the organic amine is selected from at least one of monoethanolamine, diethanolamine, N-methyldiethanolamine, 2-amino-2-methyl-1-propanol, triethylenetetramine and diethylenetriamine. The method for preparing the carbon dioxide adsorbent material provided by the present invention has the advantages of simple operation, low energy consumption, small amount of organic amine, and no secondary pollution; the obtained carbon dioxide adsorbent material has both excellent low-temperature regenerative performance and long cycle stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of a device for preparing a carbon dioxide adsorbent material provided by an embodiment of the present invention is shown; Figure 2 A schematic diagram of another device for preparing a carbon dioxide adsorbent material provided by an embodiment of the present invention is shown; Figure 3 The figure shows the dynamic adsorption penetration curve of carbon dioxide by the carbon dioxide adsorbent material provided by the embodiment of the present invention; Figure 4 shows the nitrogen adsorption / desorption curve of the carbon dioxide adsorbent material provided by the embodiment of the present invention; Figure 5 shows the pore size distribution curve of the carbon dioxide adsorbent material provided by an embodiment of the present invention; Figure 6 The carbon dioxide adsorption capacity of the carbon dioxide adsorption material provided by the embodiment of the present invention after 50 cycles of adsorption is shown. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments 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 a part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the present invention and its application or use. Based on the embodiments of the present invention, any product identical or similar to the present invention obtained by anyone under the inspiration of the present invention or by combining the features of the present invention with other prior arts falls within the scope of protection of the present invention. In addition, all other embodiments obtained by ordinary technicians in this field without carrying out creative work belong to the scope of protection of the present invention.

[0017] In the embodiment, no specific experimental steps or conditions are indicated, and the operation or conditions of the conventional experimental steps described in the prior art in this area can be carried out. The reagents used and other instruments that do not indicate the manufacturer are all conventional reagent products that can be obtained commercially. In addition, the accompanying drawings are only schematic diagrams of the embodiments of the present invention and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted. Some block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0018] Technologies, methods, and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the description of the present invention.

[0019] In the description of the present invention, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0020] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] Before describing in detail a carbon dioxide adsorption material and a preparation method thereof provided by the present invention, it is necessary to describe the related technologies as follows: The existing organic amine modification of porous adsorbent materials such as silicon-based adsorbent materials, carbon-based adsorbent materials, metal organic framework adsorbent materials or covalent organic framework materials is the main means to achieve the combination of physical adsorption and chemical absorption of CO2, and the composite of porous adsorbent materials and organic amines is mostly completed by impregnation; however, the impregnation method requires a large amount of organic amine, and the composite needs to be filtered, dried and other treatment processes after impregnation. This process results in a large amount of organic amine loss and secondary pollution, resulting in a narrow pore size range and low adsorption capacity of the obtained carbon dioxide adsorbent material. Based on this, the present invention abandons the existing idea of ​​preparing carbon dioxide adsorbent materials by liquid impregnation, and adopts the idea of ​​porous adsorbent materials to adsorb gaseous organic amines, providing a new method for preparing carbon dioxide adsorbent materials, and the specific implementation content is as follows: In a first aspect, the present invention provides a method for preparing a carbon dioxide adsorbent material, the preparation method comprising: The porous adsorption material is placed in an environment containing gaseous organic amine and allowed to stand for 24-48 hours. After the porous adsorption material adsorbs the gaseous organic amine, an organic amine liquid film is formed on the pore surface of the porous adsorption material to obtain the carbon dioxide adsorption material, wherein: The porous adsorption material is selected from at least one of a silicon-based adsorption material, a carbon-based adsorption material, a metal organic framework adsorption material and a covalent organic framework; The organic amine is selected from at least one of monoethanolamine, diethanolamine, N-methyldiethanolamine, 2-amino-2-methyl-1-propanol, triethylenetetramine and diethylenetriamine.

[0022] In specific implementation, since the porous adsorption material has a strong gas adsorption capacity, the present invention only needs to place the porous adsorption material and the gaseous organic amine in the same sealed environment, and modify the porous adsorption material with the help of the technical idea of ​​adsorbing the gaseous organic amine by the porous adsorption material to obtain the carbon dioxide adsorption material; compared with the method of obtaining the carbon dioxide adsorption material by impregnating the organic amine solution (such as the method shown in Comparative Example 2), due to the existence of surface tension, it is difficult for the organic amine to enter the pores with smaller pore sizes, so the method of impregnation modification with an organic amine solution is adopted, and a large amount of organic amine exists on the outer surface of the adsorption material, resulting in a high organic amine loading, but a low specific surface area and fewer exposed active sites. The gaseous organic amine adsorption method provided by the present invention can make the organic amine molecules enter the pores of the adsorbent. As the adsorption amount increases, the organic amine forms an organic amine liquid film in the pores and surface of the porous adsorbent material, and the liquid film can effectively reduce the pore size of the adsorbent material; and the formed organic amine liquid film has little effect on the specific surface area of ​​the adsorbent, which is beneficial to the capture of carbon dioxide; in the embodiment of the present invention, the porous adsorbent material can be selected from at least one of silicon-based adsorbent materials, carbon-based adsorbent materials, metal organic framework adsorbent materials and covalent organic frameworks; the organic amine is selected from at least one of monoethanolamine, diethanolamine, N-methyldiethanolamine, 2-amino-2-methyl-1-propanol, triethylenetetramine and diethylenetriamine.

[0023] In some embodiments, the carbon dioxide adsorbent material obtained by impregnating a porous adsorbent material with a gaseous organic amine has a higher loading amount of the organic amine than the carbon dioxide adsorbent material obtained by liquid phase impregnation due to its simple operation and no need for filtration and drying. The loading amount of the organic amine is 5%-20%.

[0024] In some embodiments, the silicon-based adsorption material is preferably selected from MCM-41; the carbon-based adsorption material is preferably selected from CMK-3; the organic metal framework is preferably selected from the organic metal framework ZIF-8; and the covalent organic framework is selected from COF-105.

[0025] Specifically, the present invention provides two methods for preparing carbon dioxide adsorbent materials according to different ways of obtaining gaseous organic amines. One method generates organic amine vapor by volatilization of organic amines, and the preparation method is carried out in a closed container with a porous movable partition provided inside. Figure 1 A schematic diagram of a device for preparing a carbon dioxide adsorbent material provided in an embodiment of the present invention is shown. Figure 1 As shown, the organic amine is placed at the bottom of a sealed container, the porous adsorption material is placed on the porous movable baffle, the sealed container is sealed, and allowed to stand for 24-48 hours, so that the porous adsorption material on the porous movable baffle can fully adsorb the organic amine vapor generated by the organic amine, thereby obtaining a carbon dioxide adsorption material.

[0026] It should be noted that the porous adsorption material adsorbs the organic amine vapor generated by the volatilization of the organic amine at 20-45° C., preferably at room temperature.

[0027] Figure 2 The schematic diagram of another device for preparing carbon dioxide adsorption material provided by an embodiment of the present invention is shown. The device structure is a fixed bed adsorption device, which includes a gas tank 1, a bubbling tower 2 and an adsorption tower 3 connected in sequence; the bubbling tower 2 is filled with organic amine liquid, and the reaction tube of the adsorption tower 3 is filled with porous adsorption material. Figure 2 The provided device is used to prepare a carbon dioxide adsorbent material, and the preparation method includes: opening a gas tank 3, allowing a first gas in the gas tank 3 to enter from a gas inlet of a bubbling tower 2, and the gas passes through an organic amine liquid to form a gaseous organic amine, which is carried out of the bubbling tower 2 with the gas flow. The gas containing the gaseous organic amine drawn out from the gas outlet of the bubbling tower 2 is sent into a reaction tube of the adsorption tower 3, and the porous adsorption material in the reaction tube adsorbs the gaseous organic amine carried out with the gas flow to form a carbon dioxide adsorbent material.

[0028] It should be noted that the gas in the gas tank can be air or nitrogen, and the flow rate of the gas in the gas tank is controlled at 50-100 mL / min. The opening time of the gas tank is controlled at 30-60 min. After closing, the solid material in the reaction tube is taken out to end the preparation.

[0029] It should be noted that the temperature in the adsorption tower is maintained at 25-30°C, preferably room temperature.

[0030] The present invention forms an organic amine liquid film on the surface of the pore by means of the adsorption of organic amine by the adsorbent material, thereby reducing the pore size and enhancing the interaction of the pore with the carbon dioxide molecule, and strengthening the capture of carbon dioxide by the chemical absorption of the organic amine. Since the adsorption of the organic amine by the adsorbent material is a physical effect, there is no special requirement for the material and surface properties of the adsorbent material. At the same time, since the organic amine liquid film can play a role in reducing the pore size, the pore size range of the adsorbent material can be effectively widened. The preparation method has the advantages of simple operation, low energy consumption, small amount of organic amine, and no secondary pollution; the obtained carbon dioxide adsorbent material has both excellent low-temperature regenerative performance and long-cycle stability.

[0031] In a second aspect, the present invention provides a carbon dioxide adsorbent material obtained by the preparation method described in the first aspect.

[0032] In order to enable those skilled in the art to more clearly understand the present invention, a carbon dioxide adsorbent material and a preparation method thereof according to the present invention are now described in detail through the following examples.

[0033] Example 1 0.15 g of silica-based adsorbent material (MCM-41) and 100 mL of diethylenetriamine (DETA) were placed in a sealed device (see Figure 1 ), and then the DETA-modified carbon dioxide adsorption material was obtained after standing for 24 h (the loading amount of DETA was 6%).

[0034] The specific surface area of ​​the carbon dioxide adsorbent obtained in this example was tested and the specific surface area was determined to be: 694 m 2 / g.

[0035] The fixed bed adsorption test was used to test the performance of the carbon dioxide adsorption material. The concentration of carbon dioxide was 400 ppm and the volume space velocity was 8000 h -1 , the adsorption temperature is 25 ℃, and the carbon dioxide concentration at the fixed bed outlet is monitored in real time by gas chromatography. The adsorption capacity of carbon dioxide adsorbent material for carbon dioxide is shown in Table 1.

[0036] Example 2 See also Figure 2 The schematic diagram provided shows that the gas tank, bubbling tower and adsorption tower are connected, 0.15 g of MCM-41 is filled in the reaction tube with a diameter of 6 mm in the adsorption tower, and the temperature of the adsorption tower is controlled at 25 °C.

[0037] The gas cylinder is filled with nitrogen. The gas cylinder is opened and the nitrogen is allowed to enter from the gas inlet at the bottom of the bubbling tower at a flow rate of 50 mL / min. At the same time, DETA is introduced from the liquid inlet at the top of the bubbling tower. The gas drawn out from the gas outlet at the top of the bubbling tower is sent into the reaction tube of the adsorption tower, so that the porous adsorption material in the reaction tube absorbs the gaseous organic amine in the gas drawn out from the gas outlet at the top of the bubbling tower. After 30 minutes, the gas cylinder is closed, the solid material in the reaction tube is removed, and the carbon dioxide adsorption material modified by DETA is obtained (the loading amount of DETA is 8%).

[0038] The specific surface area of ​​the carbon dioxide adsorbent obtained in this example was tested and the specific surface area was determined to be: 716 m 2 / g.

[0039] The fixed bed adsorption test was used to test the performance of the carbon dioxide adsorption material. The concentration of carbon dioxide was 400 ppm and the volume space velocity was 8000 h -1 , the adsorption temperature is 25 ℃, and the carbon dioxide concentration at the fixed bed outlet is monitored in real time by gas chromatography. The adsorption capacity of carbon dioxide adsorbent material for carbon dioxide is shown in Table 1.

[0040] Figure 3 The dynamic adsorption penetration curve of carbon dioxide by the carbon dioxide adsorbent material provided in the embodiment of the present invention is shown; Figure 3As shown, the carbon dioxide adsorption performance of the carbon dioxide adsorbent material provided in Example 2 is significantly improved compared with MCM-41 (not modified by DETA).

[0041] Figure 4 shows the nitrogen adsorption / desorption curve of the carbon dioxide adsorbent material provided by the embodiment of the present invention; Figure 5 The pore size distribution curve of the carbon dioxide adsorbent material provided by the embodiment of the present invention is shown in FIG. Figure 4 , 5 As shown, the pore size of the carbon dioxide adsorption material provided in Example 2 is significantly reduced after adsorbing organic amine, which is beneficial to improving the physical adsorption performance of carbon dioxide.

[0042] Figure 6 The figure shows the change of carbon dioxide adsorption capacity of the carbon dioxide adsorbent material provided by the embodiment of the present invention after 50 cycles (the carbon dioxide regeneration temperature is 60° C.). Figure 6 As shown, the carbon dioxide adsorbent material provided in Example 2 exhibits excellent long-cycle stability to carbon dioxide.

[0043] Example 3 The difference between this embodiment and embodiment 2 is that DEA is introduced into the liquid inlet at the top of the bubble column.

[0044] Example 4 The difference between this embodiment and embodiment 2 is that AMP is introduced into the liquid inlet at the top of the bubble column.

[0045] Example 5 The difference between this embodiment and embodiment 2 is that MEA is introduced into the liquid inlet at the top of the bubble tower.

[0046] Example 6 The difference between this embodiment and embodiment 2 is that MDEA is introduced into the liquid inlet at the top of the bubble column.

[0047] Example 7 The difference between this embodiment and embodiment 2 is that TETA is introduced into the liquid inlet at the top of the bubbling tower.

[0048] Example 8 The difference between this embodiment and embodiment 2 is that the porous adsorption material filled in the reaction tube is a carbon-based adsorbent CMK-3.

[0049] Example 9 The difference between this embodiment and embodiment 2 is that the porous adsorption material filled in the reaction tube is an organic metal framework ZIF-8.

[0050] Example 10 The difference between this embodiment and embodiment 2 is that the porous adsorption material filled in the reaction tube is covalent organic framework COF-105.

[0051] Comparative Example 1 Unmodified MCM-41 was used for the fixed-bed adsorption test of carbon dioxide.

[0052] The specific surface area of ​​the carbon dioxide adsorbent obtained in this comparative example was tested and the specific surface area was determined to be: 887 m 2 / g.

[0053] Comparative Example 2 MCM-41 was impregnated and modified in DETA. The specific modification method was as follows: 0.45 g DETA was mixed with 30 mL anhydrous ethanol and stirred at room temperature, and then 0.15 g MCM-41 was added and stirred at room temperature for 60 min. The mixture was transferred to a forced air drying oven and dried at 80 °C for 10 h to obtain an organic amine impregnated and modified MCM-41 adsorption material.

[0054] The specific surface area of ​​the carbon dioxide adsorbent obtained in this comparative example was tested and the specific surface area was determined to be: 346m 2 / g.

[0055] The performance of the MCM-41 adsorbent material modified by organic amine impregnation was tested by fixed bed adsorption test. The concentration of carbon dioxide was 400 ppm and the volume space velocity was 8000 h -1 , the adsorption temperature is 25 ℃, and the carbon dioxide concentration at the fixed bed outlet is monitored in real time by gas chromatography. The adsorption capacity of carbon dioxide adsorbent material for carbon dioxide is shown in Table 1.

[0056] Table 1 Carbon dioxide adsorption capacity of the embodiments and comparative examples

[0057] It can be seen from the experimental data in Table 1 that the carbon dioxide adsorbent material prepared by the modification method provided by the present invention exhibits excellent adsorption performance for carbon dioxide.

[0058] It can be seen from the results of Examples 1 and 2 and Comparative Example 1 that the carbon dioxide adsorption performance can be significantly improved by leaving the adsorbent material in an organic amine vapor atmosphere for a period of time or by passing the organic amine-containing gas through the adsorbent material bed. It can be seen from the results of Example 2 and Comparative Example 2 that the modification method of the present invention is simpler than the modification method of impregnating the organic amine solution, uses less organic amine, and has a more significant effect on improving the carbon dioxide adsorption performance by virtue of the dual effects of the organic amine liquid membrane in shrinking the pores and chemically absorbing carbon dioxide.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0060] For the method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the order of the actions described, because according to the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and components involved are not necessarily required by the present invention.

[0061] The above is a detailed introduction to a carbon dioxide adsorption material and a preparation method thereof provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for preparing a carbon dioxide adsorbent material, characterized in that: The preparation method comprises: The porous adsorption material is placed in an environment containing gaseous organic amines. After the porous adsorption material adsorbs the gaseous organic amines, an organic amine liquid film is formed in the pores and on the surface of the porous adsorption material to obtain the carbon dioxide adsorption material; wherein, The porous adsorption material is selected from at least one of a silicon-based adsorption material, a carbon-based adsorption material, a metal organic framework adsorption material and a covalent organic framework; The organic amine is selected from at least one of monoethanolamine, diethanolamine, N-methyldiethanolamine, 2-amino-2-methyl-1-propanol, triethylenetetramine and diethylenetriamine.

2. The method for preparing the carbon dioxide adsorbent material according to claim 1, characterized in that: In the carbon dioxide adsorbent material, the loading amount of the organic amine is 5%-20%.

3. The method for preparing the carbon dioxide adsorbent material according to claim 1, characterized in that: The silicon-based adsorption material is selected from MCM-41; and / or The carbon-based adsorption material is selected from CMK-3; and / or The organic metal framework is selected from the organic metal framework ZIF-8; and / or The covalent organic framework is selected from COF-105.

4. The method for preparing the carbon dioxide adsorbent material according to any one of claims 1 to 3, characterized in that: The method uses a closed container with a porous movable partition plate disposed therein, and the gaseous organic amine is produced by volatilization of the organic amine. The method comprises: The organic amine is placed at the bottom of a sealed container, the porous adsorption material is placed on the porous movable partition, the sealed container is sealed, and after standing for 24-48 hours, the solid material on the porous partition is taken out to obtain the carbon dioxide adsorption material.

5. The method for preparing the carbon dioxide adsorbent material according to claim 4, characterized in that: The sealed container is left to stand at 20-45° C. for 24-48 h.

6. The method for preparing the carbon dioxide adsorbent material according to claim 1, characterized in that: The method is carried out using a fixed bed adsorption device, which comprises a gas tank, a bubbling tower and an adsorption tower which are connected in sequence, wherein the bubbling tower is filled with an organic amine liquid, and the reaction tube of the adsorption tower is filled with the porous adsorption material. The method comprises: The gas tank is opened, and the gas in the gas tank enters from the gas inlet of the bubbling tower. The gas containing the gaseous organic amine drawn out from the gas outlet of the bubbling tower is sent into the reaction tube of the adsorption tower, so that the porous adsorption material adsorbs the gaseous organic amine in the gas to form the carbon dioxide adsorption material.

7. The method for preparing the carbon dioxide adsorbent material according to claim 6, characterized in that: The gas in the gas tank is air or nitrogen.

8. The method for preparing the carbon dioxide adsorbent material according to claim 6, characterized in that: The flow rate of the gas in the gas tank is 50-100 mL / min.

9. The method for preparing the carbon dioxide adsorbent material according to claim 6, characterized in that: The temperature in the adsorption tower is 25-30°C.

10. A carbon dioxide adsorbent material obtained by the preparation method according to any one of claims 1 to 9.

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