Novel metal organic framework material reinforced carbon dioxide trapping solvent and preparation method thereof

Abstract

The invention provides a novel metal organic framework material reinforced carbon dioxide trapping solvent and a preparation method thereof, and relates to the field of gas adsorbents. Comprising the following steps: S1, dissolving nickel salt, cobalt salt and zinc salt in water to obtain a metal salt solution; s2, uniformly mixing 2, 5-dihydroxyterephthalic acid and N, N-dimethylformamide, then adding 1-methylimidazole and ethanol, and uniformly mixing to obtain a ligand solution; s3, mixing the metal salt solution with the ligand solution, adding the mixture into a microwave reactor for reaction, filtering and drying to obtain an organic framework material; and S4, dispersing the organic framework material in deionized water, then adding an organic amine aqueous solution and a silane coupling agent, uniformly stirring, then adding an imidazolium ionic liquid, and carrying out ultrasonic oscillation to obtain the composite material. The carbon dioxide trapping solvent takes a metal organic framework material as a carrier, and the metal organic framework material is functionally modified and is matched with imidazole ionic liquid, so that the adsorption efficiency and the stability of the trapping solvent can be improved.

Description

Technical Field

[0001] The present invention relates to the field of gas adsorbents, and in particular to a novel metal organic framework material enhanced carbon dioxide capture solvent and a preparation method thereof. Background Art

[0002] Carbon capture technologies are a range of technologies designed to reduce atmospheric CO 2 The technology and methods of concentration are the key links in carbon capture, utilization and storage (CCUS) technology. Commonly used carbon dioxide capture methods include absorption, membrane separation, physical adsorption, etc. Among them, the adsorption method includes physical adsorption and chemical adsorption. Physical adsorption uses the adsorption function of the porous structure to capture carbon dioxide gas, while chemical adsorption uses the active sites on the surface of the adsorbent material to combine with carbon dioxide to fix carbon dioxide on the adsorbent. Physical adsorption has poor selectivity for gases, but the reuse rate of physical adsorbents is high; although chemical adsorption has high selectivity for gases, the reuse cost of adsorbent materials is high.

[0003] Metal organic frameworks (MOFs) are crystalline materials with a three-dimensional network structure formed by metal ions or metal clusters and organic ligands connected by coordination bonds. Due to their high adjustability, porosity and huge specific surface area, MOFs have become an ideal carbon dioxide adsorption material. The porous structure of MOFs can adsorb carbon dioxide molecules, and its adsorption mechanism mainly includes physical adsorption and chemical adsorption, which makes MOFs show excellent performance in carbon dioxide capture. However, in practical applications, the structural stability of MOFs may be affected under complex and changeable environmental conditions. Factors such as humidity and temperature may cause changes in the structure of MOFs, thereby affecting their capture performance.

[0004] Patent 201811361501.7 discloses a modification method and application of metal organic framework materials, which in situ modifies the metal nodes of metal organic framework materials through carbonyl, amino and nitrogen groups; improves the hydrophobicity and water vapor interference resistance of porous organic framework adsorbent materials, and is suitable for the capture and adsorption separation of weakly adsorbed mixed components at a certain humidity. Patent 201810536691.5 discloses an organic amine-loaded metal organic framework-porous polymer composite material and its preparation method and application. The organic amine is chemically bonded to the surface of the porous polymer pore wall and chemically bonded or coordinated to the surface of the metal organic framework material. It has the advantages of high CO2 adsorption capacity / rate / selectivity, fast desorption speed, high adsorption-desorption cycle stability, and excellent high temperature and water vapor tolerance.

[0005] The organic metal framework materials disclosed in the prior art improve the adsorption of carbon dioxide by changing the molecular structure of the organic framework materials by grafting functional groups. However, for organic metal framework materials, grafting functional groups can improve the adsorption performance, but the stability of the material needs to be improved. Summary of the invention

[0006] The purpose of the present invention is to provide a novel metal organic framework material enhanced carbon dioxide capture solvent, which uses the metal organic framework material as a carrier, functionally modifies it, and combines it with an imidazolium ion liquid to improve the adsorption efficiency and stability of the capture solvent.

[0007] Another object of the present invention is to provide a method for preparing a novel metal organic framework material enhanced carbon dioxide capture solvent, wherein the capture solvent prepared by the method has excellent adsorption performance and stability.

[0008] The present invention solves the technical problem by adopting the following technical solutions.

[0009] On the one hand, an embodiment of the present invention provides a novel metal organic framework material enhanced carbon dioxide capture solvent, comprising the following steps:

[0010] S1, dissolving nickel salt, cobalt salt and zinc salt in water to obtain a metal salt solution;

[0011] S2, 2,5-dihydroxyterephthalic acid and N,N-dimethylformamide are mixed evenly, and then 1-methylimidazole and ethanol are added and mixed evenly to obtain a ligand solution;

[0012] S3, mixing the metal salt solution and the ligand solution, adding them into a microwave reactor for reaction, filtering and drying to obtain an organic framework material;

[0013] S4, dispersing the organic framework material in deionized water, adding an organic amine aqueous solution and a silane coupling agent, stirring evenly, adding an imidazole ionic liquid, and ultrasonically shaking to obtain the product.

[0014] In some embodiments of the present invention, the nickel salt is nickel nitrate or nickel acetate, the cobalt salt is cobalt nitrate or cobalt acetate, and the zinc salt is zinc nitrate or zinc acetate.

[0015] In some embodiments of the present invention, in step S3, the temperature of the microwave reaction is 110-130° C., and the reaction time is 10-20 min.

[0016] In some embodiments of the present invention, the organic amine is a mixture of one or more of polyethyleneimine, ethylenediamine, 1,3-propylenediamine, 1,4-butylenediamine, diethylenetriamine, triethylenetetramine, diethanolamine, diisopropylamine, 2-methylaminoethanol, and 2-ethylaminoethanol.

[0017] In some embodiments of the present invention, the silane coupling agent is one of γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, and γ-glycidyloxypropyltrimethoxysilane.

[0018] In some embodiments of the present invention, in step S4, the frequency of ultrasonic oscillation is 50-60 KHz, and the duration is 30-40 min.

[0019] In some embodiments of the present invention, the imidazolium ionic liquid is one of 1,2,3,4,5-pentamethylimidazolium tetracyanoborate, 1,3-ethyl-2,4,5-methylimidazolium tetracyanoborate, 1-ethyl-3-propyl-2,4,5-methylimidazolium tetracyanoborate, and 1-ethyl-2,4,5-trimethyl-3-pentylimidazolium tetracyanoborate.

[0020] In some embodiments of the present invention, in step S4, the mass ratio of the organic framework material to the organic amine is 1:(1-2).

[0021] In some embodiments of the present invention, in step S4, the mass ratio of the organic framework material to the imidazole ionic liquid is 1:(1-2).

[0022] On the other hand, an embodiment of the present invention provides a novel metal organic framework material enhanced carbon dioxide capture solvent prepared by the above method.

[0023] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0024] The preparation method of the carbon dioxide capture solvent provided by the present invention uses metal nickel, cobalt and zinc raw materials and corresponding organic ligands to make a porous organic framework material with a high specific surface area and micropore capacity. Secondly, the nickel-cobalt metal can form a metal unsaturated bond, further improving the adsorption capacity of carbon dioxide. On the second aspect, the organic framework material is mixed with an organic amine solution. Under the action of a coupling agent, the nitrogen-containing group in the organic amine can be grafted onto the organic framework material, which can further increase the adsorption amount of carbon dioxide. On the third aspect, imidazolium ionic liquid has the advantages of stability, low volatility, large absorption capacity and low viscosity. The modified metal organic framework material is combined with the imidazolium ionic liquid, so that the carbon dioxide capture agent has the advantages of good stability and high adsorption amount. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to specific embodiments.

[0027] The embodiment of the invention provides a novel metal organic framework material enhanced carbon dioxide capture solvent, comprising the following steps:

[0028] S1, dissolving a nickel salt, a cobalt salt and a zinc salt in water to obtain a metal salt solution; the nickel salt is nickel nitrate or nickel acetate, the cobalt salt is cobalt nitrate or cobalt acetate, and the zinc salt is zinc nitrate or zinc acetate.

[0029] S2, 2,5-dihydroxyterephthalic acid and N,N-dimethylformamide are mixed evenly, and then 1-methylimidazole and ethanol are added and mixed evenly to obtain a ligand solution;

[0030] S3, mixing the metal salt solution and the ligand solution, adding them into a microwave reactor for reaction, filtering and drying to obtain an organic framework material; the microwave reaction temperature is 110-130° C., and the reaction time is 10-20 min.

[0031] S4, dispersing the organic framework material in deionized water, adding an organic amine aqueous solution and a silane coupling agent, stirring evenly, adding an imidazole ionic liquid, and ultrasonically oscillating to obtain. The frequency of the ultrasonic oscillation is 50-60KHz, and the time is 30-40min. The mass ratio of the organic framework material to the organic amine is 1:(1-2). The mass ratio of the organic framework material to the imidazole ionic liquid is 1:(1-2).

[0032] The organic amine is a mixture of one or more of polyethyleneimine, ethylenediamine, 1,3-propylenediamine, 1,4-butylenediamine, diethylenetriamine, triethylenetetramine, diethanolamine, diisopropylamine, 2-methylaminoethanol, and 2-ethylaminoethanol. The silane coupling agent is one of γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, and γ-glycidyloxypropyltrimethoxysilane. The imidazole ionic liquid is one of 1,2,3,4,5-pentamethylimidazolium tetracyanoborate, 1,3-ethyl-2,4,5-methylimidazolium tetracyanoborate, 1-ethyl-3-propyl-2,4,5-methylimidazolium tetracyanoborate, and 1-ethyl-2,4,5-trimethyl-3-pentylimidazolium tetracyanoborate.

[0033] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0034] Example 1

[0035] The carbon dioxide capture solvent of this embodiment is prepared according to the following steps:

[0036] S1, dissolving nickel nitrate, cobalt nitrate and zinc nitrate in water to obtain a metal salt solution, wherein the mass fractions of nickel nitrate, cobalt nitrate and zinc nitrate in the metal salt solution are all 10%;

[0037] S2, 2,5-dihydroxyterephthalic acid and N,N-dimethylformamide are mixed evenly in a mass ratio of 1:1, and then an equal amount of 1-methylimidazole and an equal amount of ethanol are added and mixed evenly to obtain a ligand solution;

[0038] S3, mixing the metal salt solution and the ligand solution, adding them into a microwave reactor, the power of the microwave reactor is 100W, heating to 120°C, the reaction time is 20min, then filtering and drying, to obtain an organic framework material;

[0039] S4, dispersing the organic framework material in deionized water, adding polyethyleneimine and γ-aminopropyltriethoxysilane, stirring evenly, adding 1,2,3,4,5-pentamethylimidazolium tetracyanoborate, and ultrasonically oscillating at a frequency of 50KHz for 30 minutes to obtain the carbon dioxide capture solvent of this embodiment. The mass ratio of the organic framework material to polyethyleneimine is 1:1, and the mass ratio of the organic framework material to 1,2,3,4,5-pentamethylimidazolium tetracyanoborate is 1:1.5.

[0040] Example 2

[0041] The carbon dioxide capture solvent of this embodiment is prepared according to the following steps:

[0042] S1, dissolving nickel acetate, cobalt acetate and zinc acetate in water to obtain a metal salt solution; wherein the mass fractions of nickel acetate, cobalt acetate and zinc acetate in the metal salt solution are all 10%.

[0043] S2, 2,5-dihydroxyterephthalic acid and N,N-dimethylformamide are mixed evenly in a mass ratio of 1:1, and then an equal amount of 1-methylimidazole and an equal amount of ethanol are added and mixed evenly to obtain a ligand solution;

[0044] S3, mixing the metal salt solution and the ligand solution, adding them into a microwave reactor, the power of the microwave reactor is 100W, heating to 130°C, the reaction time is 15min, then filtering and drying to obtain an organic framework material;

[0045] S4, dispersing the organic framework material in deionized water, adding ethylenediamine and γ-aminopropyltrimethoxysilane, stirring evenly, adding 1,3-ethyl-2,4,5-methylimidazolium tetracyanoborate, and ultrasonically oscillating at a frequency of 60KHz for 30 minutes to obtain the carbon dioxide capture solvent of this embodiment. The mass ratio of the organic framework material to ethylenediamine is 1:1, and the mass ratio of the organic framework material to 1,3-ethyl-2,4,5-methylimidazolium tetracyanoborate is 1:1.5.

[0046] Example 3

[0047] The carbon dioxide capture solvent of this embodiment is prepared according to the following steps:

[0048] S1, dissolving nickel nitrate, cobalt acetate and zinc nitrate in water to obtain a metal salt solution; in the metal salt solution, the mass fraction of nickel nitrate, cobalt acetate and zinc nitrate is 10%.

[0049] S2, 2,5-dihydroxyterephthalic acid and N,N-dimethylformamide are mixed evenly in a mass ratio of 1:1, and then an equal amount of 1-methylimidazole and an equal amount of ethanol are added and mixed evenly to obtain a ligand solution;

[0050] S3, mixing the metal salt solution and the ligand solution, adding them into a microwave reactor, the power of the microwave reactor is 100W, heating to 110°C, the reaction time is 20min, then filtering and drying to obtain an organic framework material;

[0051] S4, dispersing the organic framework material in deionized water, adding 1,3-propylenediamine and γ-glycidyloxypropyltrimethoxysilane, stirring evenly, adding 1-ethyl-3-propyl-2,4,5-methylimidazolium tetracyanoborate, and ultrasonically oscillating at a frequency of 60KHz for 40 minutes to obtain the carbon dioxide capture solvent of this embodiment. The mass ratio of the organic framework material to 1,3-propylenediamine is 1:1, and the mass ratio of the organic framework material to 1-ethyl-3-propyl-2,4,5-methylimidazolium tetracyanoborate is 1:1.5.

[0052] Example 4

[0053] The carbon dioxide capture solvent of this embodiment is prepared according to the following steps:

[0054] S1, dissolving nickel nitrate, cobalt nitrate and zinc nitrate in water to obtain a metal salt solution, wherein the mass fractions of nickel nitrate, cobalt nitrate and zinc nitrate in the metal salt solution are all 10%;

[0055] S2, 2,5-dihydroxyterephthalic acid and N,N-dimethylformamide are mixed evenly in a mass ratio of 1:1, and then an equal amount of 1-methylimidazole and an equal amount of ethanol are added and mixed evenly to obtain a ligand solution;

[0056] S3, mixing the metal salt solution and the ligand solution, adding them into a microwave reactor, the power of the microwave reactor is 100W, heating to 120°C, the reaction time is 20min, then filtering and drying, to obtain an organic framework material;

[0057] S4, dispersing the organic framework material in deionized water, adding diethylenetriamine and γ-glycidyloxypropyltrimethoxysilane, stirring evenly, adding 1-ethyl-2,4,5-trimethyl-3-pentyl imidazole tetracyanoborate, and ultrasonically vibrating at a frequency of 60KHz for 35 minutes to obtain the carbon dioxide capture solvent of the embodiment. The mass ratio of the organic framework material to diethylenetriamine is 1:1, and the mass ratio of the organic framework material to 1-ethyl-2,4,5-trimethyl-3-pentyl imidazole tetracyanoborate is 1:1.5.

[0058] Example 5

[0059] The carbon dioxide capture solvent of this embodiment is prepared according to the following steps:

[0060] S1, dissolving nickel acetate, cobalt nitrate and zinc nitrate in water to obtain a metal salt solution; in the metal salt solution, the mass fraction of nickel acetate, cobalt nitrate and zinc nitrate is 10%.

[0061] S2, 2,5-dihydroxyterephthalic acid and N,N-dimethylformamide are mixed evenly in a mass ratio of 1:1, and then an equal amount of 1-methylimidazole and an equal amount of ethanol are added and mixed evenly to obtain a ligand solution;

[0062] S3, mixing the metal salt solution and the ligand solution, adding them into a microwave reactor, the power of the microwave reactor is 100W, heating to 110°C, the reaction time is 20min, then filtering and drying to obtain an organic framework material;

[0063] S4, dispersing the organic framework material in deionized water, adding diethanolamine and γ-aminopropyltrimethoxysilane, stirring evenly, adding 1-ethyl-3-propyl-2,4,5-methylimidazolium tetracyanoborate, and ultrasonically oscillating at a frequency of 50KHz for 30 minutes to obtain the carbon dioxide capture solvent of this embodiment. The mass ratio of the organic framework material to the diethanolamine is 1:1, and the mass ratio of the organic framework material to the 1-ethyl-3-propyl-2,4,5-methylimidazolium tetracyanoborate is 1:1.5.

[0064] Example 6

[0065] The difference from Example 1 is that in step S4 of this embodiment, the mass ratio of the organic framework material to polyethyleneimine is 1:1.5, and the mass ratio of the organic framework material to 1,2,3,4,5-pentamethylimidazolium tetracyanoborate is 1:1. The remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0066] Example 7

[0067] The difference from Example 1 is that in this embodiment, in step S4 of this embodiment, the mass ratio of the organic framework material to polyethyleneimine is 1:2, and the mass ratio of the organic framework material to 1,2,3,4,5-pentamethylimidazolium tetracyanoborate is 1:2. The remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0068] Example 8

[0069] The difference from Example 1 is that in step S4 of this embodiment, the organic amine solution added is a mixture of polyethyleneimine and diethanolamine in a mass ratio of 1:1; the remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0070] Example 9

[0071] The difference from Example 1 is that, in this embodiment, in step S4 of this embodiment, the organic amine solution added is a mixture of ethylenediamine and 2-ethylaminoethanol in a mass ratio of 1:1; the remaining raw materials, proportions and preparation methods are the same as those of Example 1.

[0072] Example 10

[0073] The difference from Example 8 is that in step S4 of this embodiment, the imidazole ionic liquid is a mixture of 1,2,3,4,5-pentamethylimidazolium tetracyanoborate and 1,3-ethyl-2,4,5-methylimidazolium tetracyanoborate, and the mass ratio of the two is 1:1.

[0074] Comparative Example 1

[0075] The difference from Example 1 is that in this comparative example, steps S1-S3 are not performed. In step S4, ZIF-8 is directly used as a raw material, dispersed in deionized water, and then polyethyleneimine and γ-aminopropyltriethoxysilane are added and stirred evenly. Then, 1,2,3,4,5-pentamethylimidazolium tetracyanoborate is added, and ultrasonic oscillation is performed at a frequency of 50 KHz and a time of 30 min to obtain the carbon dioxide capture solvent of this comparative example.

[0076] Comparative Example 2

[0077] The difference from Example 1 is that in this comparative example:

[0078] S1, dissolving nickel nitrate and cobalt nitrate in water to obtain a metal salt solution, wherein the mass fractions of nickel nitrate, cobalt nitrate and zinc nitrate in the metal salt solution are all 10%;

[0079] S2, mixing 2,5-dihydroxyterephthalic acid and N,N-dimethylformamide in a mass ratio of 1:1 to obtain a ligand solution;

[0080] The remaining steps and raw material ratios are the same as those in Example 1.

[0081] Comparative Example 3

[0082] The difference from Example 1 is that in step S4 of this comparative example, polyethyleneimine and γ-aminopropyltriethoxysilane are not added, and the remaining steps and raw material ratios are the same as those of Example 1.

[0083] Comparative Example 4

[0084] The difference from Example 1 is that in step S4 of this comparative example, 1,2,3,4,5-pentamethylimidazolium tetracyanoborate is not added, and the remaining steps and raw material ratios are the same as those of Example 1.

[0085] Experimental example

[0086] 1. The carbon dioxide capture solvents of Examples 1-5, 8-10 and Comparative Examples 1-4 were used as test objects, and the adsorption performance of each carbon dioxide capture solvent on carbon dioxide was tested according to the following method.

[0087] Each carbon dioxide capture solvent was added to a 10 ml glass container with an inner diameter of 2 cm, and the added amount was 5 ml. The glass container was heated in a water bath, and the temperature of the carbon dioxide capture solvent was controlled to be 40°C; then carbon dioxide gas was introduced into the container at a speed of 20 ml / min, with a pressure of 0.1 MPa, and the time of introducing carbon dioxide was 2 hours. The glass container was weighed by an analytical balance before and after capture, and the mass difference before and after was the carbon dioxide capture amount. The results are shown in Table 1.

[0088] 2. Each carbon dioxide capture solvent was added to a 10 ml glass container with an inner diameter of 2 cm, and the amount added was 5 ml. The glass container was heated in a water bath, and the temperature of the carbon dioxide capture solvent was controlled to be 90°C; then carbon dioxide gas was introduced into the container at a speed of 20 ml / min, with a pressure of 0.1 MPa, and the time of introducing carbon dioxide was 2 hours. The glass container was weighed by an analytical balance before and after capture, and the mass difference before and after was the carbon dioxide capture amount. The results are shown in Table 1.

[0089] Table 1

[0090]

[0091]

[0092] It can be concluded from Table 1 that the carbon dioxide capture solvent prepared in the examples provided by the present invention has a relatively high adsorption capacity for carbon dioxide at both 40°C and 90°C.

[0093] In summary, the preparation method of the carbon dioxide capture solvent provided by the present invention uses metal nickel, cobalt and zinc raw materials and corresponding organic ligands to make a porous organic framework material with a high specific surface area and micropore capacity. Secondly, nickel and cobalt metals can form metal unsaturated bonds to further improve the adsorption capacity of carbon dioxide. On the second aspect, the organic framework material is mixed with an organic amine solution. Under the action of a coupling agent, the nitrogen-containing groups in the organic amine can be grafted onto the organic framework material, which can further increase the adsorption amount of carbon dioxide. On the third aspect, imidazolium ionic liquids have the advantages of stability, low volatility, large absorption capacity and low viscosity. The modified metal organic framework material is combined with the imidazolium ionic liquid, so that the carbon dioxide capture agent has the advantages of good stability and high adsorption capacity.

[0094] The embodiments described above are part of the embodiments of the present invention, rather than all of the embodiments. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A method for preparing a novel metal organic framework material enhanced carbon dioxide capture solvent, characterized in that: The following steps are involved: S1, dissolving nickel salt, cobalt salt and zinc salt in water to obtain a metal salt solution; S2, 2,5-dihydroxyterephthalic acid and N,N-dimethylformamide are mixed evenly, and then 1-methylimidazole and ethanol are added and mixed evenly to obtain a ligand solution; S3, mixing the metal salt solution and the ligand solution, adding them into a microwave reactor for reaction, filtering and drying to obtain an organic framework material; S4, dispersing the organic framework material in deionized water, adding an organic amine aqueous solution and a silane coupling agent, stirring evenly, adding an imidazole ionic liquid, and ultrasonically shaking to obtain the product.

2. The method for preparing the novel metal organic framework material enhanced carbon dioxide capture solvent according to claim 1, characterized in that: The nickel salt is nickel nitrate or nickel acetate, the cobalt salt is cobalt nitrate or cobalt acetate, and the zinc salt is zinc nitrate or zinc acetate.

3. The method for preparing the novel metal organic framework material enhanced carbon dioxide capture solvent according to claim 1, characterized in that: In step S3, the temperature of the microwave reaction is 110-130° C., and the reaction time is 10-20 min.

4. The method for preparing a novel metal organic framework material enhanced carbon dioxide capture solvent according to claim 1, characterized in that: The organic amine is a mixture of one or more of polyethyleneimine, ethylenediamine, 1,3-propylenediamine, 1,4-butylenediamine, diethylenetriamine, triethylenetetramine, diethanolamine, diisopropylamine, 2-methylaminoethanol, and 2-ethylaminoethanol.

5. The method for preparing a novel metal organic framework material enhanced carbon dioxide capture solvent according to claim 1, characterized in that: The silane coupling agent is one of γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane and γ-glycidyloxypropyltrimethoxysilane.

6. The method for preparing a novel metal organic framework material enhanced carbon dioxide capture solvent according to claim 1, characterized in that: In step S4, the frequency of ultrasonic oscillation is 50-60 KHz, and the duration is 30-40 minutes.

7. The method for preparing a novel metal organic framework material enhanced carbon dioxide capture solvent according to claim 1, characterized in that: The imidazole ionic liquid is one of 1,2,3,4,5-pentamethylimidazolium tetracyanoborate, 1,3-ethyl-2,4,5-methylimidazolium tetracyanoborate, 1-ethyl-3-propyl-2,4,5-methylimidazolium tetracyanoborate, and 1-ethyl-2,4,5-trimethyl-3-pentylimidazolium tetracyanoborate.

8. The method for preparing a novel metal organic framework material enhanced carbon dioxide capture solvent according to claim 1, characterized in that: In the step S4, the mass ratio of the organic framework material to the organic amine is 1:(1-2).

9. The method for preparing a novel metal organic framework material enhanced carbon dioxide capture solvent according to claim 1, characterized in that: In the step S4, the mass ratio of the organic framework material to the imidazole ionic liquid is 1:(1-2).

10. A novel metal organic framework material enhanced carbon dioxide capture solvent, characterized in that: Prepared by the method according to any one of claims 1 to 9.

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