A carbon dioxide capture material and its preparation process

Abstract

The present invention belongs to the technical field of carbon dioxide capture materials, and particularly relates to a carbon dioxide capture material and its preparation process. After the organic solvent, amino organosilane and silicon-based carrier react at 90 °C to 100 °C for 4 h to 6 h, a porous surface structure is formed and basic adsorption sites are generated; in an inorganic ion environment, the groups of the silicon-based material are activated and the surface properties of the silicon-based material are adjusted; then styrene and glycidyl methacrylate are used for modification to generate active sites for efficient carbon dioxide adsorption, improving the carbon dioxide adsorption efficiency and contributing to energy conservation and environmental protection.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon dioxide capture materials, and particularly relates to a carbon dioxide capture material and a preparation process thereof. Background Art

[0002] Injecting carbon dioxide into a kilometer-deep formation, in the underground oil reservoir, it mixes with crude oil, improves the fluidity of the crude oil, facilitates the discharge of the crude oil, and at the same time realizes the underground storage of carbon dioxide. Therefore, the carbon dioxide capture, utilization and storage technology can increase oil production and reduce carbon emissions. It is a new technology for the low-carbon and efficient development of fossil energy, that is, capturing and purifying the carbon dioxide emitted during the production process, and then putting it into a new production process for reuse and storage.

[0003] There are some existing technologies for using carbon dioxide to drive oil and technologies for capturing carbon dioxide, such as CN105134145A, CN113652219A. For another example, Chinese patent CN106582202A discloses an intermediate water supply tube bundle type carbon dioxide adsorption and capture tower, which uses a strengthened foam system, which is not only beneficial to the efficient development of oil and gas resources, but also can turn waste into treasure by using new inorganic fine particles and reduce the pollution to the air environment brought by the new inorganic fine particles. How to increase the carbon dioxide capture amount is the primary technical problem to be solved in the development of carbon dioxide capture materials. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a carbon dioxide capture material and a preparation process thereof for increasing the carbon dioxide capture amount.

[0005] The first object of the present invention is to provide a preparation process of a carbon dioxide capture material, including:

[0006] The first step is to prepare a silicon-based material

[0007] Mix an organic solvent, an amino organosilane and a silicon-based carrier, carry out a solvothermal reaction at 90 °C to 100 °C for 4 h to 6 h, collect the solid, wash and dry it to obtain a silicon-based material;

[0008] Among them, the organic solvent is anhydrous ethanol or anhydrous toluene;

[0009] The second step is activation

[0010] Add the silicon-based material to an ethanol solution with a volume fraction of 20% to 30%, adjust the solution to an alkaline solution, add an inorganic salt, and the anion of the inorganic salt is chloride ion to provide an inorganic ion environment, and carry out a solvothermal reaction at 90 °C to 100 °C for 4 h to 6 h to activate the groups of the silicon-based material;

[0011] The third step is modification

[0012] Filter the reaction product of the second step, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, and react at 65°C to 75°C for 3h to 4h under vacuum conditions to obtain a carbon dioxide capture material.

[0013] Preferably, in the preparation process of the carbon dioxide capture material, the pH of the alkaline solution is 8 to 10.

[0014] Preferably, in the preparation process of the carbon dioxide capture material, the inorganic salt is sodium chloride or calcium chloride.

[0015] Preferably, in the preparation process of the carbon dioxide capture material, the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1g: 70mL to 100mL: 0.5g to 1.5g.

[0016] Preferably, in the preparation process of the carbon dioxide capture material, when the inorganic salt is sodium chloride, the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1g: 70mL to 100mL: 1.0g to 1.5g;

[0017] When the inorganic salt is calcium chloride, the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1g: 70mL to 100mL: 0.5g to 1.0g.

[0018] Preferably, in the preparation process of the carbon dioxide capture material, in the mixed solution of the third step, the mass ratio of styrene to glycidyl methacrylate is 1:1; the condition of the vacuum reaction is to react at 70°C for 3h.

[0019] Preferably, in the preparation process of the carbon dioxide capture material, the silicon-based carrier is mesoporous material SBA-15 or DMSN.

[0020] Preferably, in the preparation process of the carbon dioxide capture material, the ratio of the organic solvent, amino organosilane, and silicon-based carrier is 1g: 80mL to 100mL: 1g to 3g.

[0021] The second object of the present invention is to provide a carbon dioxide capture material.

[0022] The third object of the present invention is to provide an application of a carbon dioxide capture material in capturing carbon dioxide.

[0023] Preferably, in the above application, the carbon dioxide capture material is used as a filler to make an adsorption column, and then carbon dioxide is captured.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] After the organic solvent, amino organosilane, and silicon-based carrier react at 90 °C to 100 °C for 8 h to 12 h, a porous surface structure is formed, and basic adsorption sites are generated; in an inorganic ion environment, the groups of the silicon-based material are activated, and the surface properties of the silicon-based material are adjusted; then, styrene and glycidyl methacrylate are used for modification to generate active sites for efficient carbon dioxide adsorption. Finally, the silicon-based carrier raw material has been modified multiple times, generating multiple active sites for efficient carbon dioxide adsorption, improving the carbon dioxide adsorption efficiency, and contributing to energy conservation and environmental protection. Description of the Drawings

[0026] Figure 1 This is the technical roadmap of the present invention. Detailed Embodiments

[0027] In order to enable those skilled in the art to better understand and implement the technical solutions of the present invention, the present invention will be further described below with reference to specific embodiments and the drawings.

[0028] In the description of the present invention, unless otherwise specified, the reagents used are commercially available, and the methods used are conventional techniques in the art.

[0029] In the description of the present invention, the mesoporous material SBA-15 was purchased from J&K Scientific Ltd., brand: J&K, product number: 962982. The mesoporous material DMSN was purchased from Hangzhou New Qiao Biotechnology Co., Ltd., and is monodisperse mesoporous silica nanoparticles (MSNs) with a particle size of 100 nm.

[0030] The technical roadmap of the present invention is shown in Figure 1 .

[0031] Example 1

[0032] A preparation process for a carbon dioxide capture material, comprising:

[0033] The first step is to prepare a silicon-based material

[0034] Mix the organic solvent, amino organosilane, and silicon-based carrier in a beaker, put them into a reaction kettle, react at 90 °C for 4 h, filter with a fast qualitative filter paper, collect the solid, wash, and dry at 90 °C to obtain a silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based carrier is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0035] The second step is activation

[0036] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to be an alkaline solution with a pH of 8 for the alkaline solution. Sodium chloride is added, and it is loaded into a reaction kettle and reacted at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, the ethanol solution, and the inorganic salt is 1 g: 70 mL: 1.5 g.

[0037] The third step, modification

[0038] The reaction product of the second step is filtered with fast qualitative filter paper, the precipitate is collected, washed until neutral, the washed precipitate is dried, and the dried precipitate is soaked in a mixed solution of styrene and glycidyl methacrylate, and reacted at 65 °C for 3 h under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0039] Example 2

[0040] A preparation process of a carbon dioxide capture material, including:

[0041] The first step, preparation of silicon-based material

[0042] The organic solvent, amino organosilane, and silicon-based carrier are mixed in a beaker, loaded into a reaction kettle, reacted at 100 °C for 4 h, filtered with fast qualitative filter paper, the solid is collected, washed, and dried at 100 °C to obtain a silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based carrier is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is mesoporous material SBA-15.

[0043] The second step, activation

[0044] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to be an alkaline solution with a pH of 8 for the alkaline solution. Sodium chloride is added, and it is loaded into a reaction kettle and reacted at 100 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, the ethanol solution, and the inorganic salt is 1 g: 70 mL: 1.5 g.

[0045] The third step, modification

[0046] The reaction product of the second step is filtered with fast qualitative filter paper, the precipitate is collected, washed until neutral, the washed precipitate is dried, and the dried precipitate is soaked in a mixed solution of styrene and glycidyl methacrylate, and reacted at 65 °C for 3 h under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0047] Example 3

[0048] A preparation process of a carbon dioxide capture material, including:

[0049] Step 1: Prepare the silicon-based material

[0050] Mix the organic solvent, amino organosilane, and silicon-based carrier in a beaker, load them into a reaction kettle, react at 90 °C for 4 h, filter with fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain the silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based carrier is 1 g: 100 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0051] Step 2: Activate

[0052] Add the silicon-based material to an ethanol solution with a volume fraction of 20%, adjust the solution to be an alkaline solution with a pH of 8, add sodium chloride, load it into a reaction kettle, and react at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1 g: 70 mL: 1.5 g.

[0053] Step 3: Modify

[0054] Filter the reaction product of the second step with fast qualitative filter paper, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, react at 65 °C for 3 h under vacuum conditions, collect the solid to obtain the carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0055] Example 4

[0056] A preparation process of a carbon dioxide capture material, comprising:

[0057] Step 1: Prepare the silicon-based material

[0058] Mix the organic solvent, amino organosilane, and silicon-based carrier in a beaker, load them into a reaction kettle, react at 90 °C for 4 h, filter with fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain the silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based carrier is 1 g: 80 mL: 3 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0059] Step 2: Activate

[0060] Add the silicon-based material to an ethanol solution with a volume fraction of 20%, adjust the solution to be an alkaline solution with a pH of 8, add sodium chloride, load it into a reaction kettle, and react at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1 g: 70 mL: 1.5 g.

[0061] The third step, modification

[0062] Filter the reaction product of the second step with a fast qualitative filter paper, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, react at 65 °C for 3 h under vacuum conditions, collect the solid to obtain a carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0063] Example 5

[0064] A preparation process of a carbon dioxide capture material, comprising:

[0065] The first step, preparing a silicon-based material

[0066] Mix an organic solvent, an amino organosilane and a silicon-based carrier in a beaker, put them into a reaction kettle, react at 90 °C for 6 h, filter with a fast qualitative filter paper, collect the solid, wash, and dry at 90 °C to obtain a silicon-based material; the ratio of the organic solvent, the amino organosilane and the silicon-based carrier is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is mesoporous material SBA-15.

[0067] The second step, activation

[0068] Add the silicon-based material to an ethanol solution with a volume fraction of 20%, adjust the solution to an alkaline solution with a pH of 8, add sodium chloride, put it into a reaction kettle, react at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, the ethanol solution and the inorganic salt is 1 g: 70 mL: 1.5 g.

[0069] The third step, modification

[0070] Filter the reaction product of the second step with a fast qualitative filter paper, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, react at 65 °C for 3 h under vacuum conditions, collect the solid to obtain a carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0071] Example 6

[0072] A preparation process of a carbon dioxide capture material, comprising:

[0073] The first step, preparing a silicon-based material

[0074] Mix the organic solvent, amino organosilane, and silicon-based support in a beaker, transfer it into a reaction kettle, react at 90 °C for 4 h, filter with fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain the silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based support is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based support is the mesoporous material SBA-15.

[0075] Step 2, activation

[0076] Add the silicon-based material to an ethanol solution with a volume fraction of 20%, adjust the solution to be an alkaline solution with a pH of 8, add sodium chloride, transfer it into a reaction kettle, and react at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1 g: 100 mL: 1.5 g.

[0077] Step 3, modification

[0078] Filter the reaction product of the second step with fast qualitative filter paper, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, and react at 65 °C for 3 h under vacuum conditions, collect the solid to obtain the carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0079] Example 7

[0080] A preparation process of a carbon dioxide capture material, comprising:

[0081] Step 1, prepare the silicon-based material

[0082] Mix the organic solvent, amino organosilane, and silicon-based support in a beaker, transfer it into a reaction kettle, react at 90 °C for 4 h, filter with fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain the silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based support is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based support is the mesoporous material SBA-15.

[0083] Step 2, activation

[0084] Add the silicon-based material to an ethanol solution with a volume fraction of 20%, adjust the solution to be an alkaline solution with a pH of 8, add sodium chloride, transfer it into a reaction kettle, and react at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1 g: 70 mL: 1 g.

[0085] Step 3, modification

[0086] Filter the reaction product of the second step with fast qualitative filter paper, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, and react at 65 °C for 3 h under vacuum conditions. Collect the solid to obtain a carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0087] Example 8

[0088] A preparation process of a carbon dioxide capture material, comprising:

[0089] The first step is to prepare a silicon-based material

[0090] Mix the organic solvent, amino organosilane and silicon-based carrier in a beaker, put them into a reaction kettle, react at 90 °C for 4 h, filter with fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain a silicon-based material; the ratio of the organic solvent, amino organosilane and silicon-based carrier is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0091] The second step is activation

[0092] Add the silicon-based material to an ethanol solution with a volume fraction of 20%, adjust the solution to an alkaline solution with a pH of 8, add sodium chloride, put it into a reaction kettle, and react at 90 °C for 6 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, ethanol solution and inorganic salt is 1 g: 70 mL: 1.5 g.

[0093] The third step is modification

[0094] Filter the reaction product of the second step with fast qualitative filter paper, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, and react at 65 °C for 3 h under vacuum conditions. Collect the solid to obtain a carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0095] Example 9

[0096] A preparation process of a carbon dioxide capture material, comprising:

[0097] The first step is to prepare a silicon-based material

[0098] Mix the organic solvent, amino organosilane, and silicon-based carrier in a beaker, transfer them into a reaction kettle, react at 90 °C for 4 h, filter with a fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain a silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based carrier is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0099] The second step is activation

[0100] Add the silicon-based material to an ethanol solution with a volume fraction of 20%, adjust the solution to an alkaline solution with a pH of 10, add sodium chloride, transfer it into a reaction kettle, and react at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1 g: 70 mL: 1.5 g.

[0101] The third step is modification

[0102] Filter the reaction product of the second step with a fast qualitative filter paper, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, and react at 65 °C for 3 h under vacuum conditions, collect the solid to obtain a carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0103] Example 10

[0104] A preparation process of a carbon dioxide capture material, comprising:

[0105] The first step is to prepare a silicon-based material

[0106] Mix the organic solvent, amino organosilane, and silicon-based carrier in a beaker, transfer them into a reaction kettle, react at 90 °C for 4 h, filter with a fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain a silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based carrier is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0107] The second step is activation

[0108] Add the silicon-based material to an ethanol solution with a volume fraction of 20%, adjust the solution to an alkaline solution with a pH of 8, add calcium chloride, transfer it into a reaction kettle, and react at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1 g: 70 mL: 0.5 g.

[0109] The third step is modification

[0110] Filter the reaction product of the second step with fast qualitative filter paper, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, and react at 65 °C for 3 h under vacuum conditions. Collect the solid to obtain a carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0111] Example 11

[0112] A preparation process of a carbon dioxide capture material includes:

[0113] The first step is to prepare a silicon-based material

[0114] Mix an organic solvent, an amino organosilane, and a silicon-based carrier in a beaker, put them into a reaction kettle, react at 90 °C for 4 h, filter with fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain a silicon-based material; the ratio of the organic solvent, the amino organosilane, and the silicon-based carrier is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is mesoporous material DMSN.

[0115] The second step is activation

[0116] Add the silicon-based material to an ethanol solution with a volume fraction of 20%, adjust the solution to an alkaline solution with a pH of 8, add sodium chloride, put it into a reaction kettle, and react at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, the ethanol solution, and the inorganic salt is 1 g: 70 mL: 1.5 g.

[0117] The third step is modification

[0118] Filter the reaction product of the second step with fast qualitative filter paper, collect the precipitate, wash it until neutral, dry the washed precipitate, soak the dried precipitate in a mixed solution of styrene and glycidyl methacrylate, and react at 65 °C for 3 h under vacuum conditions. Collect the solid to obtain a carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0119] Control 1

[0120] Control 1 is the prior art and is the adsorption material prepared in Example 1 of CN106732410B.

[0121] Control 2

[0122] A preparation process of a carbon dioxide capture material without activation includes:

[0123] The first step is to prepare a silicon-based material

[0124] Mix the organic solvent, amino organosilane, and silicon-based support in a beaker, transfer it to a reaction kettle, react at 90 °C for 4 h, filter with fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain the silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based support is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based support is the mesoporous material SBA-15.

[0125] Step 2, modification

[0126] Soak the silicon-based material obtained in the first step in a mixed solution of styrene and glycidyl methacrylate, react at 65 °C for 3 h under vacuum conditions, collect the solid to obtain the carbon dioxide capture material. Among them, in the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0127] Control 3

[0128] A preparation process of a carbon dioxide capture material, which is modified only once, includes:

[0129] Step 1, prepare the silicon-based material

[0130] Mix the organic solvent, amino organosilane, and silicon-based support in a beaker, transfer it to a reaction kettle, react at 90 °C for 4 h, filter with fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain the silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based support is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based support is the mesoporous material SBA-15.

[0131] Control 4

[0132] A preparation process of a carbon dioxide capture material, which is modified only once + activated, includes:

[0133] Step 1, prepare the silicon-based material

[0134] Mix the organic solvent, amino organosilane, and silicon-based support in a beaker, transfer it to a reaction kettle, react at 90 °C for 4 h, filter with fast qualitative filter paper, collect the solid, wash it, and dry it at 90 °C to obtain the silicon-based material; the ratio of the organic solvent, amino organosilane, and silicon-based support is 1 g: 80 mL: 1 g, the amino organosilane is 3-aminopropyltriethoxysilane, and the silicon-based support is the mesoporous material SBA-15.

[0135] Step 2, activation

[0136] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to be an alkaline solution with a pH of 8. Sodium chloride is added, and it is loaded into a reaction kettle and reacted at 90 °C for 4 h to activate the groups of the silicon-based material; the ratio of the silicon-based material, ethanol solution, and inorganic salt is 1 g: 70 mL: 1.5 g. The reaction product of the second step is filtered with fast qualitative filter paper, the precipitate is collected, washed to neutrality, and the washed precipitate is dried to obtain a solid material.

[0137] Since the carbon dioxide capture material prepared in the present invention is aimed at improving the carbon dioxide capture amount, we refer to the method of CN106732410B to test the carbon dioxide adsorption amount, with the unit of mmol / g. To compare the carbon dioxide capture capabilities of materials prepared by different methods, the results are shown in Table 1.

[0138] Table 1 Carbon dioxide adsorption amounts at different temperatures

[0139]

[0140]

[0141] In order to further prove the effect stability of the material of the present invention and exclude the interference of the detection method on the results, we also refer to another set of detection methods "Fu Shuixiang, Wang Yaoqiang. Determination of carbon dioxide adsorption amount in activated carbon particles [J], Environmental Science and Technology, 2010 (S1): 3. DOI: CNKI:SUN:FJKS.0.2010-S1-070" to test the adsorption rate, and the results are shown in Figure 2.

[0142] Table 2 Carbon dioxide adsorption rates (%) at different temperatures

[0143]

[0144]

[0145] It can be seen from the data in Table 1 and Table 2 that no matter which detection method is adopted, the carbon dioxide capture material prepared in the present invention has a higher capture amount.

[0146] It should be noted that when the present invention involves numerical ranges, it should be understood that any value between the two endpoints of each numerical range and the two endpoints can be selected. Since the steps and methods adopted are the same as those in the examples, in order to prevent repetition, the present invention describes the preferred examples. Although the preferred examples of the present invention have been described, those skilled in the art can make additional changes and modifications to these examples once they know the basic creative concept, and these changes and modifications all fall within the scope of the present invention.

[0147] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. If these modifications and variations of the present invention fall within the scope of equivalent technologies of the present invention, the present invention also intends to include these changes and modifications.

Claims

1. A process for preparing a carbon dioxide capture material, characterized in that: include: The first step is to prepare silicon-based materials The organic solvent, aminoorganosilane and silicon-based carrier are mixed, and the mixture is subjected to a solvent thermal reaction at 90°C to 100°C for 4h to 6h, and the solid is collected, washed and dried to obtain a silicon-based material; Step 2: Activation The silicon-based material is added to an ethanol solution with a volume fraction of 20% to 30%, the pH of the solution is adjusted to be alkaline, an inorganic salt is added, and the anion of the inorganic salt is a chloride ion, and a solvent thermal reaction is performed at 90° C. to 100° C. for 4 h to 6 h to activate the groups of the silicon-based material; The third step, modification The reaction product of the second step is filtered, the precipitate is collected, washed to neutrality, the washed precipitate is dried, and the dried precipitate is immersed in a mixed solution of styrene and glycidyl methacrylate, and reacted at 65° C. to 75° C. under vacuum conditions for 3 h to 4 h to obtain a carbon dioxide capture material.

2. The process for preparing the carbon dioxide capture material according to claim 1, characterized in that: The pH of the alkaline solution is 8-10.

3. The process for preparing the carbon dioxide capture material according to claim 2, characterized in that: The inorganic salt is sodium chloride or calcium chloride.

4. The process for preparing the carbon dioxide capture material according to claim 3, characterized in that: The ratio of the silicon-based material, the ethanol solution and the inorganic salt is 1g:70mL-100mL:0.5g-1.5g.

5. The process for preparing the carbon dioxide capture material according to claim 3, characterized in that: When the inorganic salt is sodium chloride, the ratio of the silicon-based material, the ethanol solution, and the inorganic salt is 1 g: 70 mL to 100 mL: 1.0 g to 1.5 g; When the inorganic salt is calcium chloride, the ratio of the silicon-based material, the ethanol solution and the inorganic salt is 1 g: 70 mL to 100 mL: 0.5 g to 1.0 g.

6. The process for preparing the carbon dioxide capture material according to claim 3, characterized in that: In the first step, the ratio of organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL~100mL:1g~3g; In the mixed solution of the third step, the mass ratio of styrene to glycidyl methacrylate is 1:1; the vacuum reaction conditions are 70°C for 3h.

7. The process for preparing the carbon dioxide capture material according to claim 3, characterized in that: The silicon-based carrier is a mesoporous material SBA-15 or monodispersed mesoporous silicon oxide nanoparticles.

8. The carbon dioxide capture material prepared by the preparation process according to any one of claims 1 to 7.

9. Use of the carbon dioxide capture material according to claim 8 in capturing carbon dioxide.

10. The use according to claim 9, characterized in that: The carbon dioxide capture material is used as filler to make an adsorption column, and then the carbon dioxide is captured.

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