Carbon dioxide trapping adsorbent, preparation method and application thereof, and carbon dioxide adsorption equipment

Abstract

The invention relates to the technical field of carbon dioxide capture, and discloses a carbon dioxide capture adsorbent, a preparation method and application thereof and carbon dioxide adsorption equipment. The carbon dioxide trapping adsorbent comprises an adsorption carrier, organic amine and a surfactant, wherein the adsorption carrier loads the surfactant and the organic amine; the adsorption carrier comprises a mesoporous material, and the surfactant is diethanol amine. Organic amine and a surfactant diethanol amine are loaded on a mesoporous material through an impregnation method, the modified solid amine adsorbent for directly capturing carbon dioxide in air is obtained, the prepared carbon dioxide capturing adsorbent is large in adsorption capacity and high in amino utilization rate, the adsorption performance is improved by 10 times or above compared with that of an original mesoporous carrier, and the carbon dioxide capturing adsorbent has a good application prospect. Compared with the carbon dioxide trapping solid amine adsorbent without the surfactant, the carbon dioxide trapping solid amine adsorbent has the advantages that the adsorption capacity, the adsorption rate, the amine efficiency and the stability are obviously improved.

Description

Technical Field

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

[0002] With the accelerated development of urbanization and industrialization, global energy and electricity demand has grown rapidly, which has led to a sharp increase in the consumption of fossil fuels. Greenhouse gases released during the combustion of fossil fuels, especially carbon dioxide, account for more than 90% of total greenhouse gas emissions, becoming the main driver of climate change. Although traditional carbon capture, utilization and storage technologies (CCUS) have achieved certain results in reducing carbon dioxide emissions from large stationary sources such as power plants, refineries and chemical plants, these technologies are mainly aimed at point source emissions and have limited effect on reducing the existing carbon dioxide content in the atmosphere. Therefore, it has become particularly important to explore and develop negative emission technologies such as direct air carbon dioxide capture technology. These technologies can directly absorb carbon dioxide from the atmosphere, providing new solutions for achieving real carbon dioxide emission reductions and addressing climate change.

[0003] In the field of direct air capture (DAC), solid amine adsorbents (porous materials functionalized with amine groups) have received extensive attention and application in DAC technology due to their advantages such as fast adsorption rate, strong carbon dioxide adsorption selectivity, and low adsorption and desorption temperature. However, current solid amine adsorbents still have disadvantages such as low carbon dioxide adsorption capacity and poor cycle stability. Further improving the adsorption capacity of the adsorbent while solving the problem of poor thermochemical stability is a difficulty faced by DAC technology. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a carbon dioxide capture adsorbent and a preparation method thereof, so that the carbon dioxide capture adsorbent can significantly improve the adsorption capacity of carbon dioxide and have high cycle stability;

[0005] Another object of the present application is to provide the use of the above-mentioned carbon dioxide capture adsorbent in the preparation of a product that adsorbs carbon dioxide;

[0006] Another object of the present application is to provide a carbon dioxide adsorption device based on the above-mentioned carbon dioxide capture adsorbent.

[0007] In order to solve the above technical problems / achieve the above purposes or at least partially solve the above technical problems / achieve the above purposes, as a first aspect of the present application, a carbon dioxide capture adsorbent is provided, comprising an adsorption carrier, an organic amine and a surfactant, wherein the adsorption carrier loads the surfactant and the organic amine; the adsorption carrier comprises a mesoporous material, and the surfactant is diethanolamine; the mass percentage of the adsorption carrier is 30-50%, the mass percentage of the organic amine is 40-60%, and the mass percentage of the surfactant is 8-12%.

[0008] Further optionally, the organic amine includes one or more of tetraethylenepentamine, polypropyleneimine, and polyethyleneimine, and the adsorption carrier includes mesoporous silica, wherein the average pore size of the mesoporous silica can be 18.4±3 nm.

[0009] As a second aspect of the present application, a method for preparing the carbon dioxide capture adsorbent is provided, comprising:

[0010] The organic amine and the surfactant are mixed in an organic solvent to form an impregnation solution, the adsorption carrier is added into the impregnation solution for full contact, and the organic solvent is removed to obtain the carbon dioxide capture adsorbent.

[0011] Optionally, the usage ratio of the organic solvent to the adsorption carrier is 10-20 mL: 200 mg.

[0012] Optionally, the organic solvent includes one or both of methanol and ethanol.

[0013] As a third aspect of the present application, a method for carbon dioxide adsorption combining physical and chemical adsorption is provided, wherein the carbon dioxide capture adsorbent described in the present application is used to perform adsorption in an environment where carbon dioxide needs to be adsorbed.

[0014] As a fourth aspect of the present application, a carbon dioxide adsorption device is provided, comprising the carbon dioxide capture adsorbent described in the present application.

[0015] The present application loads organic amines and surfactants on a mesoporous material by an impregnation method to obtain a modified solid amine adsorbent for direct air carbon dioxide capture. The carbon dioxide capture adsorbent prepared in the present application has a large adsorption capacity and a high amine group utilization rate. The adsorption performance is improved by more than 10 times compared with the original mesoporous material carrier. Compared with the solid amine adsorbent for carbon dioxide capture without the addition of a surfactant, the adsorption capacity, adsorption rate, amine efficiency and stability are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application.

[0017] Figure 1 The figure shows a schematic flow diagram of the synthesis process of the carbon dioxide capture adsorbent of the present application; wherein, 1-organic amine impregnation modifier, 2-surfactant, 3-organic solvent, 4-mesoporous material adsorption carrier, 5-carbon dioxide capture adsorbent;

[0018] Figure 2 The following are sample images of the adsorbents of Comparative Example 1, Example 1 and Example 2 under a scanning electron microscope; wherein, from left to right, Figures a and b are scanning electron microscope images of Comparative Example 1 (C) and Example 1 (D1 / T5 / C4), respectively (scale bar 1 μm);

[0019] Figure 3 The figure shows a schematic diagram of saturated adsorption of the carbon dioxide capture adsorbent of the present application under room temperature conditions; wherein C represents comparative example 1, T1 / S1 represents comparative example 2, T1 / C1 represents comparative example 3, D1 / T5 / C4 represents embodiment 1, and N1 / T5 / S4 represents comparative example 4;

[0020] Figure 4 It is a schematic diagram of cyclic adsorption of the carbon dioxide capture adsorbent of the present application under room temperature conditions; wherein, T1 / S1 represents comparative example 2, T1 / C1 represents comparative example 3, D1 / T5 / C4 represents embodiment 1, and N1 / T5 / S4 represents comparative example 4;

[0021] Figure 5 The figure shows the variation of the adsorption amount of the carbon dioxide capture adsorbent of the present application at room temperature with the number of cycles; wherein T1 / S1 represents comparative example 2, T1 / C1 represents comparative example 3, D1 / T5 / C4 represents embodiment 1, and N1 / T5 / S4 represents comparative example 4. DETAILED DESCRIPTION

[0022] The present application discloses a carbon dioxide capture adsorbent, a preparation method and application thereof, and a carbon dioxide adsorption device. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve it. It is particularly important to point out that all similar substitutions and modifications are obvious to those skilled in the art, and they are all deemed to be included in this application. The products, processes and applications described in this application have been described through preferred embodiments. Relevant personnel can obviously modify or appropriately change and combine the products, processes and applications described in this article without departing from the content, spirit and scope of this application to realize and apply the technology of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0023] It should be noted that, in this article, if relational terms such as "first" and "second", "step 1" and "step 2", and "(1)" and "(2)" appear, they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements. At the same time, the embodiments in this application and the features in the embodiments may be combined with each other without conflict.

[0024] Traditional solid adsorbents have limitations such as small adsorption capacity and slow adsorption rate under low carbon dioxide partial pressure conditions, especially for direct air carbon dioxide capture at room temperature. The adsorption capacity is low; the present application improves the defects of existing solid adsorbents by introducing amine-containing materials into mesoporous materials to achieve a combination of physical adsorption and chemical adsorption. At the same time, the present application adds surface additives during the process of impregnation and introduction of organic amines, improves the distribution of loaded amine molecules in the mesoporous material substrate, exposes more active amine sites to the solid amine adsorbent, further increases the adsorption amount of carbon dioxide, and improves the cyclic adsorption performance of the adsorbent to a certain extent, and has obvious advantages for direct air carbon dioxide capture under room temperature conditions. Therefore, in the first aspect of the present application, a carbon dioxide capture adsorbent is provided, including an adsorption carrier, an organic amine and a surfactant, the adsorption carrier loads a surfactant and an organic amine; the adsorption carrier includes a mesoporous material, and the surfactant is diethanolamine.

[0025] In certain embodiments of the present application, the mass percentage of the adsorption carrier is 30-50%, for example 30%, 35%, 40%, 45%, 50%, etc., the mass percentage of the organic amine is 40-60%, for example 40%, 45%, 50%, 55%, 60%, etc., and the mass percentage of the surfactant is 8-12%, for example 8%, 9%, 10%, 11%, 12%, etc.

[0026] In certain embodiments of the present application, the organic amine includes one or more of tetraethylene pentamine, polypropylene imine, and polyethylene imine, and the adsorption carrier includes mesoporous silica. In some other embodiments of the present application, the mesoporous silica has high porosity and large mesopore diameter, and its average pore diameter can be selected as 18.4±3nm. The clogging problem of the loaded amine in the carrier pores is alleviated, and more amine molecules can be loaded therein through impregnation modification, and its adsorption performance can be significantly improved.

[0027] In the second aspect of the present application, the carbon dioxide capture adsorbent is prepared by an impregnation method, which is simpler to prepare, has a larger adsorption capacity and a faster adsorption rate. The preparation method comprises:

[0028] The organic amine and the surfactant are mixed in an organic solvent to form an impregnation solution, the adsorption carrier is added into the impregnation solution for full contact, and the organic solvent is removed to obtain the carbon dioxide capture adsorbent.

[0029] In certain embodiments of the present application, the preparation method comprises:

[0030] S1, vacuum drying the adsorption carrier; dissolving the impregnation modifier organic amine and the surfactant in an organic solvent and stirring and mixing;

[0031] S2, adding the vacuum-dried adsorption carrier to the stirred mixed solution, and stirring the resulting suspension evenly;

[0032] S3, removing the organic solvent from the stirred suspension to obtain an adsorbent for direct air carbon dioxide capture; the schematic diagram of the process is shown in Figure 1 .

[0033] In certain embodiments of the present application, the usage ratio of the organic solvent and the adsorption carrier is 10-20mL:200mg, and the organic solvent includes but is not limited to one or two of methanol and ethanol. Other conventional organic solvents that can dissolve organic amines and surfactants can be used.

[0034] In certain embodiments of the present application, the vacuum drying temperature is 110-120° C., and the time is 8-12 hours; the stirring can be performed by a magnetic stirrer, the rotation speed can be selected to be about 800 rpm, and the stirring time can be selected to be 1-8 hours.

[0035] In certain embodiments of the present application, the method for removing the organic solvent may be by evaporation, such as rotary evaporation, the temperature of the rotary evaporation may be selected to be 35-40° C., and the rotation speed during the rotary evaporation may be selected to be about 60 rpm.

[0036] In the third aspect of the present application, the present application has conducted various performance tests on the provided carbon dioxide capture adsorbent. The results show that at 25°C for a 400ppm carbon dioxide / nitrogen mixture (the volume fraction of carbon dioxide is 0.04%, and the rest is nitrogen), the carbon dioxide capture adsorbent prepared by the present application has an adsorption capacity of more than 3.0mmol / g, and the adsorption performance of four adsorption and desorption cycles is only reduced by about 12% at the lowest. Based on this, the present application provides the use of the carbon dioxide capture adsorbent in the preparation of a product that adsorbs carbon dioxide or for use in the adsorption of carbon dioxide; for example, a carbon dioxide adsorption method combining physical and chemical adsorption, using the carbon dioxide capture adsorbent described in the present application to adsorb in an environment where carbon dioxide needs to be adsorbed, the method combines physical adsorption with chemical adsorption, and the adsorption efficiency is higher.

[0037] In a fourth aspect of the present application, a carbon dioxide adsorption device is also provided, comprising the carbon dioxide capture adsorbent described in the present application.

[0038] In certain embodiments of the present application, the carbon dioxide adsorption equipment may further include a temperature control device to control the temperature to achieve an adsorption and desorption cycle; it may also include a storage device for collecting carbon dioxide after desorption, and the collected carbon dioxide can be used for other purposes; it may also include a device for increasing the air flow rate.

[0039] In each group of comparative experiments provided in this application, unless otherwise specified, other experimental conditions, materials, etc. are kept consistent except for the differences indicated in each group, so as to provide comparability. The experimental materials and reagents used in the examples can be obtained from commercial channels unless otherwise specified.

[0040] The following is a further description of a carbon dioxide capture adsorbent provided in the present application, its preparation method and application, and a carbon dioxide adsorption device.

[0041] Embodiment 1:

[0042] The large-pore mesoporous silica (Silica) with an average pore size of about 18.4 nm was placed in a vacuum oven and vacuum dried at 110°C for 8 hours in order to remove moisture and adsorbed gases such as carbon dioxide.

[0043] Weigh 50 mg of diethanolamine (DEA) and 250 mg of tetraethylenepentamine (TEPA) solution into a 50 mL beaker, and then weigh 10 mL of anhydrous methanol and add it to the beaker. Put a magnetic stir bar in the beaker, place the beaker on a magnetic stirrer, and stir continuously at 800 r / min for 1 hour at room temperature. The purpose of stirring is to make the organic amine impregnation modifier and surfactant loaded more evenly on the silicon-based carrier.

[0044] 200 mg of dried large-pore mesoporous silica (Silica) carrier was added to the stirred solution, and magnetic stirring was continued for 8 hours at the same rotation speed to obtain a suspension.

[0045] The suspension was transferred into a rotary evaporator and the methanol solvent was removed by rotary evaporation at room temperature at a speed of 60 r / min. The obtained powder was vacuum dried in a vacuum oven at room temperature for 8 hours to obtain a modified solid amine adsorbent for direct air carbon dioxide capture, named D1 / T5 / C4. The scanning electron micrograph is shown in Figure 2 .

[0046] Comparative Example 1:

[0047] The large-pore mesoporous silica (Silica) with an average pore size of about 18.4 nm was placed in a vacuum oven and vacuum dried at 110°C for 8 hours to obtain adsorbent C. The scanning electron microscope image is shown in Figure 2 .

[0048] Comparative Example 2:

[0049] The commercial SBA-15 with an average pore size of about 6.5 nm was placed in a vacuum oven and vacuum dried at 110° C. for 8 hours.

[0050] Weigh 200 mg of tetraethylenepentamine (TEPA) and put it into a 50 mL beaker, then weigh 10 mL of anhydrous methanol and add it to the beaker. Put a magnetic stirrer in the beaker, place the beaker on a magnetic stirrer, and stir continuously at 800 r / min for 1 hour at room temperature. Add 200 mg of dried mesoporous silica (SBA-15) carrier to the stirred solution, keep stirring at the same speed for 8 hours to obtain a suspension. Move the suspension into a rotary evaporator and remove the methanol solvent by rotary evaporation at 60 r / min at room temperature. The obtained powder is vacuum dried in a vacuum oven at room temperature for 8 hours to obtain a modified solid amine adsorbent for direct air carbon dioxide capture, named T1 / S1.

[0051] Comparative Example 3:

[0052] The large-pore mesoporous silica (Silica) with an average pore diameter of about 18.4 nm was placed in a vacuum oven and vacuum dried at 110° C. for 8 hours.

[0053] Weigh 200 mg of tetraethylenepentamine (TEPA) and put it into a 50 mL beaker, then weigh 10 mL of anhydrous methanol and add it to the beaker. Put a magnetic stirrer in the beaker, place the beaker on a magnetic stirrer, and stir continuously at 800 r / min for 1 hour at room temperature. Add 200 mg of dried large-pore mesoporous silica (Silica) carrier to the stirred solution, keep stirring at the same speed for 8 hours to obtain a suspension. Move the suspension into a rotary evaporator and remove the methanol solvent by rotary evaporation at 60 r / min at room temperature. The obtained powder is vacuum dried in a vacuum oven at room temperature for 8 hours to obtain a modified solid amine adsorbent for direct air carbon dioxide capture, named T1 / C1.

[0054] Comparative Example 4:

[0055] Commercial SBA-15 (the same as Comparative Example 2) with an average pore diameter of about 6.5 nm was placed in a vacuum oven and vacuum dried at 110° C. for 8 hours.

[0056] Weigh 50 mg of titanium propoxide (NPA-Ti) and 250 mg of tetraethylenepentamine (TEPA) solution, put them into a 50 mL beaker, and then weigh 10 mL of anhydrous methanol and add them to the beaker. Put a magnetic stirrer in the beaker, place the beaker on a magnetic stirrer, and stir continuously for 1 hour at 800 r / min at room temperature. Add 200 mg of dried mesoporous silica (SBA-15) carrier to the stirred solution, keep the same speed and continue magnetic stirring for 8 hours to obtain a suspension. Move the suspension into a rotary evaporator and remove the methanol solvent by rotary evaporation at 60 r / min at room temperature. The obtained powder is vacuum dried in a vacuum oven at room temperature for 8 hours to obtain a modified solid amine adsorbent for direct air carbon dioxide capture, named N1 / T5 / S4.

[0057] Experimental example:

[0058] (1) Adsorption performance

[0059] The carbon dioxide adsorption performance of each adsorbent was tested using a TGA / DSC synchronous thermal analyzer, and the corresponding program was set in the software. First, the sample was pretreated, and high-purity N2 was introduced into the instrument. The temperature was increased from 25°C to 110°C at a heating rate of 10°C / min, and kept at 110°C for 2 hours to remove the residual water and previously adsorbed carbon dioxide in the adsorbent pores. Then the temperature was cooled to 25°C at a cooling rate of 5°C / min, and high-purity N2 was continued to be introduced at 25°C for 1 hour to complete the sample pretreatment. Subsequently, the gas flow was switched to a mixed gas containing 400ppm carbon dioxide / nitrogen, and adsorbed for 10 hours until the adsorbent was saturated with adsorption, and then the gas flow was switched to high-purity N2, and the sample was desorbed at a rate of 10°C / min from 25°C to 110°C. The adsorption performance results are shown in Table 1.

[0060] Table 1 Adsorption test results of 400ppm carbon dioxide in the embodiments and comparative examples

[0061]

[0062]

[0063] According to Table 1 and Figure 3It can be seen that the carbon dioxide adsorption capacity of adsorbent T1 / C1 in Comparative Example 3 is increased by about ten times compared with the solid adsorbent C in Comparative Example 1 to which no organic amine impregnation modifier and surfactant are added, indicating that the organic amine impregnation modification process can significantly improve the carbon dioxide adsorption capacity of the solid adsorbent; the carbon dioxide adsorption capacity of adsorbent T1 / C1 in Comparative Example 3 is increased relative to the carbon dioxide adsorption capacity of adsorbent T1 / S1 in Comparative Example 2, indicating the advantages of the large-pore mesoporous silica carrier itself. The increase in the pore size of the solid carrier alleviates the accumulation and blockage problem of the organic amine impregnation modifier in the pores, making the flow of carbon dioxide in the solid amine material more sufficient and having more reaction adsorption area, so that it has a larger adsorption capacity for carbon dioxide adsorption.

[0064] In Comparative Example 4, adsorbent N1 / T5 / S4 contains additional surfactant titanium n-propoxide compared to adsorbent T1 / S1 in Comparative Example 2. However, from the data in Table 1 and Figure 3 From the curve, it can be seen that titanium n-propoxide cannot significantly increase the adsorption amount of carbon dioxide and the amine efficiency of the adsorbent, which indicates that only a suitable surfactant, such as diethanolamine used in this application, can significantly improve the adsorption effect of carbon dioxide.

[0065] The carbon dioxide adsorption capacity of the adsorbent D1 / T5 / C4 in Example 1 of the present application is increased by 17.1% compared with the adsorbent T1 / C1 in Comparative Example 3, and the amine efficiency is increased by 9.1%, indicating that the addition of the surfactant diethanolamine can further improve the adsorption capacity and amine efficiency of carbon dioxide, and reduce the volume of the blockage area of ​​the organic amine impregnation modifier in the pores, thereby reducing the carbon dioxide diffusion kinetics limitation, so that the adsorption rate of the adsorbent in Example 1 is significantly improved relative to Comparative Example 3, which is significantly different from the effect of using the surfactant titanium n-propoxide in Comparative Example 4. At the same time, the surfactant diethanolamine releases more amine active sites and reduces the viscosity of the amine at the physical level, and can change the mechanism of action of some amine groups with carbon dioxide at the chemical level, thereby improving the amine efficiency of the adsorbent.

[0066] (2) Cyclic stability

[0067] The TGA / DSC simultaneous thermal analyzer was used to test the carbon dioxide cyclic adsorption performance of each adsorbent. The pretreatment step and the heating and cooling steps of the adsorption and desorption steps of the cyclic adsorption process were the same as those of the single adsorption process. The adsorption time of each cycle was 7.5 hours, the desorption time was 25 minutes, and the number of cycles was 4. The cyclic adsorption performance results are shown in Table 2.

[0068] Table 2 Cyclic adsorption test results of 400ppm carbon dioxide in the embodiments and comparative examples

[0069]

[0070]

[0071] Combining Table 2 and Figure 4 , Figure 5 It can be seen that the carbon dioxide adsorption amount of the adsorbent in Example 1 and the adsorbents in Comparative Examples 2, 3, and 4 all decreases to a certain extent with the increase in the number of cycles, which is mainly caused by the loss of the organic amine impregnation modifier during the adsorption and desorption process. After 4 cycles, the adsorbent D1 / T5 / C4 in Example 1 decreased by 12.6% compared with cycle 1, the comparative example 2 decreased by 17.5%, the comparative example 3 decreased by 11.6%, and the comparative example 4 decreased by 18.6%. This shows that compared with SBA-15, the large-pore mesoporous silica (Silica) has better cyclic stability as a solid amine adsorbent carrier; on the other hand, the presence of the surfactant diethanolamine will have a certain promoting effect on the cyclic stability of the adsorbent, and will also enhance the carbon dioxide adsorption rate of the adsorbent. The same surfactant, titanium n-propoxide, cannot bring this promoting effect, and its degree of decline is equivalent to that of the comparative example 2 without the use of a surfactant.

[0072] Based on the above performance test results, the carrier used in this application is a commercial silicon source, the raw materials are easy to obtain, the cost is low, the organic amine impregnation modifier and surfactant used are commonly used in industry, and the process flow of the synthetic adsorbent is simple and easy to operate. In the direct air capture process, the maximum adsorption capacity of carbon dioxide by the modified solid amine adsorbent of this application is 3.048mmol / g, and the amine efficiency is 0.215mol carbon dioxide / mol nitrogen, which can be used as an excellent choice for future DAC adsorption materials.

[0073] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A carbon dioxide capture adsorbent, characterized in that: The invention comprises an adsorption carrier, an organic amine and a surfactant, wherein the adsorption carrier carries the surfactant and the organic amine; the adsorption carrier comprises a mesoporous material, and the surfactant is diethanolamine; the mass percentage of the adsorption carrier is 30-50%, the mass percentage of the organic amine is 40-60%, and the mass percentage of the surfactant is 8-12%.

2. The carbon dioxide capture adsorbent according to claim 1, characterized in that The organic amine includes one or more of tetraethylenepentamine, polypropyleneimine and polyethyleneimine.

3. The carbon dioxide capture adsorbent according to claim 1, characterized in that The adsorption carrier includes mesoporous silica.

4. The carbon dioxide capture adsorbent according to claim 3, characterized in that The average pore diameter of the mesoporous silica is 18.4±3 nm.

5. The method for preparing the carbon dioxide capture adsorbent according to claim 1, characterized in that: include: The organic amine and the surfactant are mixed in an organic solvent to form an impregnation solution, the adsorption carrier is added into the impregnation solution for full contact, and the organic solvent is removed to obtain the carbon dioxide capture adsorbent.

6. The preparation method according to claim 5, characterized in that: The usage ratio of the organic solvent to the adsorption carrier is 10-20 mL: 200 mg.

7. The preparation method according to claim 5 or 6, characterized in that: The organic solvent includes one or both of methanol and ethanol.

8. A method for carbon dioxide adsorption combining physical and chemical adsorption, characterized in that: The carbon dioxide capture adsorbent according to any one of claims 1 to 4 is used to perform adsorption in an environment where carbon dioxide needs to be adsorbed.

9. A carbon dioxide adsorption device, characterized in that: The carbon dioxide capture adsorbent comprises the carbon dioxide capture adsorbent according to any one of claims 1 to 4.

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