Carbon dioxide trapping material and preparation process thereof

Abstract

The invention belongs to the technical field of carbon dioxide trapping materials, and particularly relates to a carbon dioxide trapping material and a preparation process thereof. The preparation method comprises the following steps: reacting an organic solvent, amino organosilane and a silicon-based carrier at 90-100 DEG C for 4-6 hours to form a porous surface structure and generate alkaline adsorption sites; in an inorganic ion environment, activating groups of the silicon-based material, and adjusting surface properties of the silicon-based material; then, styrene and glycidyl methacrylate are adopted for modification, so that active sites for efficiently adsorbing carbon dioxide are generated, the carbon dioxide adsorption efficiency is improved, and energy conservation and environmental protection are facilitated.

Description

Technical Field

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

[0002] Carbon dioxide is injected into the thousand-meter formation and mixed with crude oil in the underground oil reservoir, which improves the fluidity of crude oil, facilitates its discharge, and realizes the underground storage of carbon dioxide. Therefore, carbon dioxide capture, utilization and storage technology can achieve oil production increase and carbon emission reduction, and is an emerging technology for low-carbon and efficient development of fossil energy, that is, the carbon dioxide emitted in the production process is captured and purified, and then put into the new production process for reuse and storage.

[0003] There are some technologies that utilize carbon dioxide to flood oil and capture carbon dioxide in the prior art, such as CN105134145A, CN113652219A, and Chinese patent CN106582202A discloses an intermediate water-supplemented tube bundle carbon dioxide adsorption capture tower, which utilizes an enhanced foam system, which is not only conducive to the efficient development of oil and gas resources, but also can turn waste into treasure and utilize new inorganic fine particles to reduce the pollution caused by new inorganic fine particles to the air environment. How to increase the amount of carbon dioxide captured 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, which are used to increase the carbon dioxide capture amount.

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

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

[0007] The organic solvent, aminoorganosilane and silicon-based carrier are mixed, and the mixture is subjected to 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;

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

[0009] Step 2: Activation

[0010] The silicon-based material is added to an ethanol solution with a volume fraction of 20% to 30%, the solution is adjusted to be an alkaline solution, an inorganic salt is added, and the anion of the inorganic salt is a chloride ion to provide an inorganic ion environment, 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;

[0011] The third step, modification

[0012] 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.

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

[0014] Preferably, in the process for preparing 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, the ethanol solution, and the inorganic salt is 1 g: 70 mL to 100 mL: 0.5 g to 1.5 g.

[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, the ethanol solution, and the inorganic salt is 1 g: 70 mL to 100 mL: 1.0 g to 1.5 g;

[0017] 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.

[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; and the vacuum reaction condition is 70° C. for 3 hours.

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

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

[0021] A 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 a use 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 the carbon dioxide is captured.

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

[0025] The present invention forms a multi-porous surface structure and generates alkaline adsorption sites after an organic solvent, aminoorganosilane and a silicon-based carrier react at 90°C to 100°C for 8h to 12h; activates the groups of the silicon-based material and adjusts the surface properties of the silicon-based material in an inorganic ion environment; and then uses styrene and glycidyl methacrylate for modification to generate active sites for efficient carbon dioxide adsorption. Finally, the silicon-based carrier raw material undergoes multiple modifications to generate multiple active sites for efficient carbon dioxide adsorption, thereby improving the carbon dioxide adsorption efficiency and contributing to energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the technical roadmap of the present invention. DETAILED DESCRIPTION

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

[0028] In the description of the present invention, unless otherwise specified, all reagents used are commercially available and all 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 Technology Co., Ltd., brand: J&K, item number: 962982. The mesoporous material DMSN was purchased from Hangzhou Xinqiao Biotechnology Co., Ltd., which 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 process for preparing a carbon dioxide capture material, comprising:

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

[0034] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0035] Step 2: Activation

[0036] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 4 hours 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 a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0039] Example 2

[0040] A process for preparing a carbon dioxide capture material, comprising:

[0041] The first step is to prepare silicon-based materials

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

[0043] Step 2: Activation

[0044] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 100° C. for 4 hours 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 a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0047] Example 3

[0048] A process for preparing a carbon dioxide capture material, comprising:

[0049] The first step is to prepare silicon-based materials

[0050] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:100mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0051] Step 2: Activation

[0052] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 4 hours 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.

[0053] The third step, modification

[0054] The reaction product of the second step is filtered with a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0055] Example 4

[0056] A process for preparing a carbon dioxide capture material, comprising:

[0057] The first step is to prepare silicon-based materials

[0058] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:3g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0059] Step 2: Activation

[0060] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 4 hours 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.

[0061] The third step, modification

[0062] The reaction product of the second step is filtered with a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0063] Example 5

[0064] A process for preparing a carbon dioxide capture material, comprising:

[0065] The first step is to prepare silicon-based materials

[0066] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 6 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0067] Step 2: Activation

[0068] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 4 hours 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] The reaction product of the second step is filtered with a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0071] Example 6

[0072] A process for preparing a carbon dioxide capture material, comprising:

[0073] The first step is to prepare silicon-based materials

[0074] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0075] Step 2: Activation

[0076] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 4 hours 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: 100 mL: 1.5 g.

[0077] The third step, modification

[0078] The reaction product of the second step is filtered with a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0079] Example 7

[0080] A process for preparing a carbon dioxide capture material, comprising:

[0081] The first step is to prepare silicon-based materials

[0082] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0083] Step 2: Activation

[0084] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 4 hours 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 g.

[0085] The third step, modification

[0086] The reaction product of the second step is filtered with a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0087] Example 8

[0088] A process for preparing a carbon dioxide capture material, comprising:

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

[0090] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0091] Step 2: Activation

[0092] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 6 hours 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.

[0093] The third step, modification

[0094] The reaction product of the second step is filtered with a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0095] Example 9

[0096] A process for preparing a carbon dioxide capture material, comprising:

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

[0098] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0099] Step 2: Activation

[0100] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 10. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 4 hours 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.

[0101] The third step, modification

[0102] The reaction product of the second step is filtered with a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0103] Example 10

[0104] A process for preparing a carbon dioxide capture material, comprising:

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

[0106] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0107] Step 2: Activation

[0108] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Calcium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 4 hours 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:0.5 g.

[0109] The third step, modification

[0110] The reaction product of the second step is filtered with a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0111] Embodiment 11

[0112] A process for preparing a carbon dioxide capture material, comprising:

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

[0114] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material DMSN.

[0115] Step 2: Activation

[0116] The silicon-based material is added to an ethanol solution with a volume fraction of 20%, and the solution is adjusted to an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90° C. for 4 hours 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, modification

[0118] The reaction product of the second step is filtered with a rapid qualitative filter paper, 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, reacted at 65°C for 3 hours under vacuum conditions, and the solid is collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0119] Comparison 1

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

[0121] Comparison 2

[0122] A process for preparing a carbon dioxide capture material without activation, comprising:

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

[0124] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0125] The second step is modification

[0126] The silicon-based material in the first step is immersed in a mixed solution of styrene and glycidyl methacrylate, reacted at 65°C for 3 hours under vacuum conditions, and solids are collected to obtain a carbon dioxide capture material. In the mixed solution, the mass ratio of styrene to glycidyl methacrylate is 1:1.

[0127] Comparison 3

[0128] A process for preparing a carbon dioxide capture material, which is modified only once, comprising:

[0129] The first step is to prepare silicon-based materials

[0130] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier is the mesoporous material SBA-15.

[0131] Comparison 4

[0132] A process for preparing a carbon dioxide capture material, which is modified once and activated, comprises:

[0133] The first step is to prepare silicon-based materials

[0134] The organic solvent, aminoorganosilane and silicon-based carrier are mixed in a beaker, loaded into a reactor, reacted at 90°C for 4 hours, filtered with rapid qualitative filter paper, the solid was collected, washed, and dried at 90°C to obtain a silicon-based material; the ratio of the organic solvent, aminoorganosilane and silicon-based carrier is 1g:80mL:1g, the aminoorganosilane is 3-aminopropyltriethoxysilane, and the silicon-based carrier 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 an alkaline solution with a pH of 8. Sodium chloride is added, and the solution is placed in a reactor and reacted at 90°C for 4 hours to activate the groups of the silicon-based material; the ratio of the silicon-based material, the ethanol solution, and the inorganic salt is 1g:70mL:1.5g. The reaction product of the second step is filtered with a rapid qualitative filter paper, the precipitate is collected, washed to neutrality, and the washed precipitate is dried to obtain a solid material.

[0137] Since the present invention prepares carbon dioxide capture materials and aims to increase the carbon dioxide capture capacity, we refer to the method of CN106732410B to test the carbon dioxide adsorption capacity, in units of mmol / g, to compare the carbon dioxide capture capacity of materials prepared by different methods, and the results are shown in Table 1.

[0138] Table 1 Carbon dioxide adsorption at different temperatures

[0139]

[0140]

[0141] In order to further prove the stability of the effect of the material of the present invention and eliminate the interference of the detection method on the results, we also refer to another set of detection methods "Fu Shuixiang, Wang Yaoqiang. Determination of the adsorption amount of carbon dioxide 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 2.

[0142] Table 2 Carbon dioxide adsorption rate 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 used, the carbon dioxide capture material prepared by the present invention has a higher capture capacity.

[0146] It should be noted that when the present invention involves a numerical range, it should be understood that the two endpoints of each numerical range and any value between the two endpoints can be selected. Since the steps and methods used are the same as those in the embodiments, in order to avoid redundancy, the present invention describes a preferred embodiment. Although the preferred embodiments of the present invention have been described, once those skilled in the art know the basic creative concept, they can make other changes and modifications to these embodiments, 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 the equivalent technology of the present invention, the present invention is also intended to include these modifications and variations.

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 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 DMSN.

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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