CN117225376A - Porous solid adsorbent for carbon dioxide and preparation method thereof - Google Patents
Porous solid adsorbent for carbon dioxide and preparation method thereof Download PDFInfo
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- CN117225376A CN117225376A CN202310905326.8A CN202310905326A CN117225376A CN 117225376 A CN117225376 A CN 117225376A CN 202310905326 A CN202310905326 A CN 202310905326A CN 117225376 A CN117225376 A CN 117225376A
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- carbon dioxide
- porous solid
- boehmite
- pseudo
- solid adsorbent
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 55
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 55
- 239000003463 adsorbent Substances 0.000 title claims abstract description 38
- 239000007787 solid Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 28
- 229920002873 Polyethylenimine Polymers 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000005470 impregnation Methods 0.000 claims abstract description 7
- 238000011068 loading method Methods 0.000 claims abstract description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 33
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 22
- 239000011148 porous material Substances 0.000 claims description 13
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 11
- 239000004005 microsphere Substances 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 1
- 159000000013 aluminium salts Chemical class 0.000 claims 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract description 24
- 239000012467 final product Substances 0.000 abstract description 2
- 239000005431 greenhouse gas Substances 0.000 abstract description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract description 2
- 238000002336 sorption--desorption measurement Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 229910001593 boehmite Inorganic materials 0.000 description 5
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 5
- 239000011343 solid material Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 1
- JGDITNMASUZKPW-UHFFFAOYSA-K aluminium trichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Al](Cl)Cl JGDITNMASUZKPW-UHFFFAOYSA-K 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000012621 metal-organic framework Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000001935 peptisation Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000001508 potassium citrate Substances 0.000 description 1
- 229960002635 potassium citrate Drugs 0.000 description 1
- QEEAPRPFLLJWCF-UHFFFAOYSA-K potassium citrate (anhydrous) Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 description 1
- 235000011082 potassium citrates Nutrition 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 150000003839 salts Chemical group 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- POZPMIFKBAEGSS-UHFFFAOYSA-K trisodium;2-hydroxypropane-1,2,3-tricarboxylate;trihydrate Chemical compound O.O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O POZPMIFKBAEGSS-UHFFFAOYSA-K 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910006636 γ-AlOOH Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The application discloses a carbon dioxide porous solid adsorbent and a preparation method thereof, and relates to the technical field of carbon dioxide adsorption. The preparation method comprises the steps of taking pseudo-boehmite as a carrier, and loading polyethyleneimine on the pseudo-boehmite by adopting a wet impregnation method. According to the preparation method, pseudo-boehmite is directly used as a carrier, so that the carbon dioxide adsorption capacity of the load group amino is improved; at the same time, the addition of polyethyleneimine enhances the stability of the final product. Meanwhile, the preparation method is simple in process and mild in reaction condition, and the prepared porous solid adsorbent has strong adsorption performance on carbon dioxide which is a main greenhouse gas.
Description
Technical Field
The application relates to the technical field of carbon dioxide adsorption, in particular to a carbon dioxide porous solid adsorbent and a preparation method thereof.
Background
In recent years, global warming caused by the "greenhouse effect" has become one of the most interesting environmental problems, and the contribution rate of carbon dioxide to global warming is about 2/3, which has been classified by the U.S. environmental protection agency as a pollutant that may be harmful to public health and social welfare in 12 months 2009. Among the various methods for capturing carbon dioxide which have been studied, the porous solid adsorption method has great comprehensive advantages in terms of capturing efficiency, energy consumption, environment, cost and the like, because it is easier to realize the adsorption-desorption cycle process of carbon dioxide.
The carbon dioxide adsorption performance of the porous solid material is closely related to the specific surface area, pore volume, average pore diameter and other texture properties, and the number of alkaline sites, alkali strength and other physical and chemical properties. The ideal carbon dioxide adsorbent meets the following criteria: low preparation cost, high mechanical strength, hydrothermal stability and chemical stability; high adsorption capacity, high selectivity, fast adsorption/desorption kinetics, high regeneration performance and long service life. Currently, commonly used carbon dioxide adsorbing materials mainly include activated carbon (base) materials, carbon molecular sieves, carbon nanotube base materials, zeolites, metal organic framework compounds, metal oxides, hydrotalcite-like compounds, and the like. The general idea of development is to graft alkaline components such as organic amine and alkali (earth) metal on the surface of a porous solid material or directly synthesize the alkaline porous solid material according to the weak acidity characteristic of carbon dioxide.
However, the organic amine functionalized porous solid material has the defects of poor thermal stability, easy decomposition of organic amine functional groups and the like, and limits the application of the organic amine functionalized porous solid material.
Disclosure of Invention
Aiming at the problems, the application provides the carbon dioxide porous solid adsorption material with good thermal stability and high adsorption quantity, and the preparation method is simple and the reaction condition is mild.
The application solves the technical problems by adopting the following technical scheme:
a method for preparing a porous solid adsorbent of carbon dioxide, comprising: the pseudo-boehmite is used as a carrier, and the polyethyleneimine is loaded on the pseudo-boehmite by adopting a wet impregnation method.
In the application, pseudo-boehmite is directly used as a carrier, and the pseudo-boehmite can provide a reaction adsorption environment containing a large amount of hydroxyl groups, and the adsorption quantity of amine groups in the polyethyleneimine is obviously increased in the environment; meanwhile, the stability of the pseudo-boehmite is enhanced by adding the load polyethylenimine.
Further, the preparation process of pseudo-boehmite comprises dissolving aluminum salt in water, adding citric acid and ethanol into the aluminum salt solution, heating for reaction, and vacuum drying. The pseudo-boehmite with the appearance of hollow microspheres is prepared by adopting low-cost aluminum salt under the hydrothermal condition and using citric acid and ethanol as appearance regulators.
Further, the ratio of the amount of aluminum in the aluminum salt to the amount of citric acid was 4:3.
Further, the average diameter of the pore diameter in the pseudo-boehmite of the hollow microspheres is 3-5 mu m.
Further, the process of loading the polyethyleneimine on the pseudo-boehmite by adopting a wet impregnation method comprises the following steps: and (3) adding pseudo-boehmite and polyethyleneimine into the ethanol solution, stirring and mixing, and heating and drying in an oven.
Further, the added amount of polyethyleneimine accounts for 85% of the mass fraction of the carbon dioxide porous solid adsorbent.
On the other hand, the application also provides the carbon dioxide porous solid adsorbent prepared by the method.
Compared with the prior art, the carbon dioxide porous solid adsorbent and the preparation method thereof have the following main advantages:
(1) The pseudo-boehmite is directly used as a carrier, so that the carbon dioxide adsorption capacity of the load group amino is improved; at the same time, the addition of polyethyleneimine enhances the stability of the final product.
(2) The porous solid adsorbent prepared by the method has the advantages of simple process and mild reaction conditions, and has strong adsorption performance on carbon dioxide which is a main greenhouse gas.
Drawings
FIG. 1 is an SEM image of pseudo-boehmite prepared in example 1 of the application;
FIG. 2 is an SEM image of a porous solid adsorbent of carbon dioxide prepared in example 2 of the application;
FIG. 3 is an adsorption-desorption cycle chart of the carbon dioxide porous solid adsorbent prepared in example 2 of the present application.
Description of the embodiments
The present application will be described in further detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present application to those skilled in the art. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the application. All other embodiments, based on the embodiments of the application, which are obtained by a person of ordinary skill in the art without making any inventive effort, are within the scope of the application.
As mentioned in the background, porous solid adsorption to adsorb carbon dioxide is a promising technological route. On the technical route, in order to obtain a porous material with excellent carbon dioxide adsorption performance, the carrier is required to have better thermal stability, and the unique pore structure (specific surface area, pore volume and average pore diameter) of the porous material can be still maintained at higher temperature; it is also desirable that its surface have a sufficiently high number of basic sites and be highly dispersed to increase its carbon dioxide adsorption capacity.
Pseudo-boehmite (gamma-AlOOH.nH) 2 O, n=0.08-0.62) is a type of boehmite with less than complete crystallization, also known as boehmite colloid, pseudo/quasi/pseudo boehmite, boehmite-like or gelatinous boehmite, a family of hydrated aluminas with a range of transition from weakly crystalline to crystalline, disordered to ordered, and with a specific surface area much higher than that of boehmite with complete crystallization. The crystal structure of pseudo-boehmite is similar to that of boehmite, but has smaller grains and poorer crystallinity, and has a typical thin fold layer structure.
Pseudo-boehmite has many excellent characteristics such as high interfacial gibbs free energy, zero charge, high specific surface area, large porosity, good peptization property, good dispersibility, thixotropic gel and the like.
In the art, when a technician selects aluminum metal oxide as a carrier to prepare a carbon dioxide porous solid adsorption material, alumina with a more stable structure is generally selected as the carrier, and the application overcomes the prejudice, creatively selects pseudo-boehmite with a relatively unstable structure as the carrier and combines polyethylene imine as a carrier, and the prepared carbon dioxide porous solid adsorption material has stable adsorption-desorption performance and very excellent carbon dioxide adsorption capacity, overcomes the defect of the pseudo-boehmite structure, and fully exerts the characteristic of large specific surface area.
The application provides a preparation method of a carbon dioxide porous solid adsorbent, which comprises the steps of taking pseudo-boehmite as a carrier and loading polyethyleneimine on the pseudo-boehmite by adopting a wet impregnation method.
Of these, the pseudo-boehmite raw material may be commercially available raw material, but is more preferably prepared by the following method: dissolving aluminum salt in water, adding citric acid and ethanol into the aluminum salt solution, heating for reaction, and vacuum drying. The aluminum salt raw material may be, for example, aluminum trichloride, aluminum sulfate, etc., and is not limited thereto; citric acid may also be replaced with salts containing citrate such as sodium citrate or potassium citrate.
Under the hydrothermal condition, citric acid and ethanol are used as morphology regulators to prepare pseudo-boehmite with morphology of hollow microspheres, and the subsequent hollow microsphere adsorbent loaded with amino groups has shell layers and multi-stage pore structures, so that the diffusion resistance of carbon dioxide is reduced, and further stronger carbon dioxide adsorption capacity is obtained.
In one embodiment, the ratio of the molar amount of aluminum in the aluminum salt to the molar amount of citric acid (or citrate) is 4:3.
In one embodiment, the average diameter of the pore size in the pseudo-boehmite of the hollow microspheres is 3-5 μm.
Further, the process of loading the polyethyleneimine on the pseudo-boehmite by adopting a wet impregnation method comprises the following steps: and (3) adding pseudo-boehmite and polyethyleneimine into the ethanol solution, stirring and mixing, and heating and drying in an oven. More preferably, the polyethyleneimine is added in an amount of 85% by mass of the carbon dioxide porous solid adsorbent.
The application will be further described with reference to examples and figures.
Example 1: preparation of pseudo-boehmite by hollow microsphere
6mmol of aluminum trichloride hexahydrate was weighed on an electronic balance, dissolved in 35ml of deionized water under strong stirring, then 8mmol of sodium citrate trihydrate was added, and stirred at room temperature for 30min. After that, 5ml of ethanol was added to the solution, and after stirring uniformly, the solution was transferred to a 100ml polytetrafluoroethylene reaction kettle, and then the reaction kettle was placed in a constant temperature drying oven for constant temperature reaction at 200 ℃. And taking the polytetrafluoroethylene reaction kettle out of the drying box after 24 hours, and naturally cooling the polytetrafluoroethylene reaction kettle to room temperature. And separating the suspension in the reaction kettle by using a sand core funnel to obtain a white product. The separated white product was washed 3 times with distilled water, rinsed 2 times with ethanol, and then placed in a vacuum drying oven, and vacuum-dried at 80 ℃ for 12 hours. The obtained product is pseudo-boehmite of hollow microspheres.
As shown in FIG. 1, an SEM image of pseudo-boehmite, a hollow microsphere, which is obtained in example 1; from the figure, it can be clearly seen that the pseudo-boehmite is microspherical, and has perfect appearance, basically no damage and uniform dispersion. It can also be seen from the figure that pseudo-boehmite is a hollow microsphere with a statistical average pore diameter of about 3-5 μm.
It should be noted that the ratio of the molar amounts of aluminum and citric acid in the raw materials given in example 1 is 4:3, which may also be 4:1, 2:1, 1:1.
example 2: preparation of carbon dioxide porous solid adsorbent by taking pseudo-boehmite as carrier
The required mass of Polyethylenimine (PEI) was weighed out and dissolved in 50g of ethanol and stirred for 20min, during which 5g of pseudo-boehmite prepared in example 1 was added to the solution. Placing the obtained suspension at 30deg.C for 160 r.min -1 24h in the shaker. Finally, the mixture was taken out and dried in an oven at 100℃for 10h. The porous solid carbon dioxide adsorbent is prepared, wherein the PEI accounts for 85% of the mass of the porous solid carbon dioxide adsorbent in the preparation process. The PEI addition amount accounts for 10%, 30% and 50% of the mass of the carbon dioxide porous solid adsorbent.
Fig. 2 is an SEM image of the porous solid carbon dioxide adsorbent prepared in example 2, from which it can be seen that the pores at the adsorbent surface decrease when PEI is loaded. The pseudo-boehmite has a relatively large specific surface area, and the large specific surface area enables more active sites to be contacted with reactant carbon dioxide after PEI is loaded.
In practical applications, carbon dioxide is not only required to have a high adsorption capacity, but also to maintain stable adsorption performance after a plurality of adsorption-desorption cycles. The porous solid carbon dioxide adsorbent prepared in example 2 was selected as a study object, the adsorption temperature was 50 ℃, and the carbon dioxide pressure was 1.2MPa. The regeneration condition is that the vacuum is pumped at 100 ℃. As can be seen from fig. 3, the adsorption performance of the adsorbent remained stable after 5 adsorption-desorption cycles.
In the present application, low temperature N is used 2 The structural characteristics and physical properties of the adsorbent were characterized by adsorption-desorption (BET), scanning Electron Microscopy (SEM), and the like, and the performance of the adsorbent was evaluated using a gravimetric microbalance experimental apparatus (Rubotherm microbalance, bochum, germany).
The above examples are only for the purpose of clearly illustrating the application and are not to be construed as a complete limitation of the embodiments. Other variations in form will be apparent to those of ordinary skill in the art in light of the foregoing description, and it is not necessary to present examples of all embodiments herein, but obvious variations are contemplated as falling within the scope of the application.
Claims (10)
1. A method for preparing a porous solid adsorbent for carbon dioxide, comprising the steps of:
and taking pseudo-boehmite as a carrier, and loading the polyethyleneimine on the pseudo-boehmite by adopting a wet impregnation method.
2. The method for preparing a porous solid carbon dioxide adsorbent according to claim 1, wherein the preparation process of pseudo-boehmite comprises dissolving aluminum salt in water, adding citric acid and ethanol into the aluminum salt solution, heating for reaction, and vacuum drying.
3. The method for preparing a porous solid adsorbent for carbon dioxide according to claim 2, wherein the ratio of the amount of aluminum substance in the aluminum salt to the amount of citric acid substance is 4:1-4.
4. A method of preparing a porous solid adsorbent for carbon dioxide as claimed in claim 2 or 3, wherein the ratio of the amount of aluminium in the aluminium salt to the amount of citric acid is 4:3.
5. The method for preparing a porous solid adsorbent for carbon dioxide according to claim 4, wherein the pseudo-boehmite prepared is in the shape of hollow microspheres.
6. The method for preparing a porous solid adsorbent for carbon dioxide according to claim 5, wherein the average diameter of the pore size in pseudo-boehmite of the hollow microspheres is 3 to 5 μm.
7. The method for preparing a porous solid adsorbent for carbon dioxide according to claim 1, wherein the process of loading the polyethyleneimine on pseudo-boehmite by a wet impregnation method comprises: and adding the pseudo-boehmite and the polyethyleneimine into an ethanol solution, stirring and mixing, and heating and drying in an oven.
8. The method for preparing a porous solid adsorbent for carbon dioxide according to claim 7, wherein the polyethyleneimine is added in an amount of 10 to 85% by mass of the porous solid adsorbent for carbon dioxide.
9. The method for producing a carbon dioxide porous solid adsorbent as claimed in claim 7 or 8, wherein the polyethyleneimine is added in an amount of 85% by mass of the carbon dioxide porous solid adsorbent.
10. A carbon dioxide porous solid adsorbent prepared by the method of any one of claims 1-9.
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| CN118079852A (en) * | 2024-04-22 | 2024-05-28 | 成都许量科技发展有限公司 | Carbon dioxide capturing material for mosquito trapping device and preparation method thereof |
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| CN118079852A (en) * | 2024-04-22 | 2024-05-28 | 成都许量科技发展有限公司 | Carbon dioxide capturing material for mosquito trapping device and preparation method thereof |
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