Preparation and application of an imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorption material

Abstract

The present invention provides a preparation method of an imidazole column aromatic hydrocarbon-impregnated silicon carbon dioxide adsorbent material and its application in selective adsorption and separation of carbon dioxide. Under nitrogen protection, the present invention uses 1,4-bis(2-bromoethoxy)benzene, a dibromophenol ether derivative of 1,4-benzenediol, as a module to prepare a bromoethoxy-substituted brominated column aromatic hydrocarbon. The brominated column aromatic hydrocarbon is further modified with 2-aminoimidazole to obtain an aminoimidazole-modified brominated column aromatic hydrocarbon. Finally, a multi-step impregnation method is used to impregnate the aminoimidazole-modified brominated column aromatic hydrocarbon in porous silica to obtain an imidazole column aromatic hydrocarbon-impregnated silicon carbon dioxide adsorbent material. The imidazole column aromatic hydrocarbon-impregnated silicon carbon dioxide adsorbent material provided by the present invention has rich active action sites, a wide pore size distribution range, and a designable structure. The adsorbent material exhibits good adsorption and selective separation capabilities for carbon dioxide. In addition, the adsorbent material has good repeatability and stability.

Description

Technical Field

[0001] The invention relates to the preparation of an imidazole column aromatic hydrocarbon-impregnated silicon carbon dioxide adsorption material and its application in efficient adsorption and selective separation of carbon dioxide, belonging to the technical field of environment and energy utilization. Background Art

[0002] Carbon dioxide (CO2) emitted from the flue gases of fossil fuel combustion is a major contributor to the greenhouse effect. With the continued intensification of industrialization, if no action or emission reduction controls are taken, atmospheric CO2 concentrations will continue to rise, posing a serious threat to the environment and human health upon which survival depends. The resulting climate change, such as the 1-3 mm annual sea level rise, is driven by atmospheric CO2 concentrations. Furthermore, CO2-induced ocean acidification is believed to have impacts on organisms and ecosystems. Currently, carbon capture and storage / sequestration, as well as carbon capture and utilization, are key research topics in addressing environmental pollution.

[0003] In recent years, a variety of materials such as porous carbon, zeolite molecular sieves, resins, porous organic polymers, metal-organic frameworks, covalent organic frameworks, and ionic liquids have been widely used in CO2 adsorption and separation research. However, among the many materials, supramolecular macrocyclic compounds such as crown ethers, cyclodextrins, calix[n]arene, and cucurbit[n]uril have shown good application prospects in CO2 encapsulation or adsorption after functional modification due to their macrocyclic cavities. Therefore, functionalization and derivatization of supramolecular macrocyclic hosts are expected to develop excellent CO2 adsorption materials for selective separation of CO2. Pillar[5]arene, as a new supramolecular macrocyclic host, has good research prospects in CO2 adsorption due to its advantages such as being able to be synthesized under mild conditions, high yield, easy functionalization and derivatization, and its own cavity.

[0004] Based on this, the present invention proposes a new and efficient method for preparing an imidazole-coated aromatic hydrocarbon-impregnated silicon CO adsorbent material, and applies it to the study of efficient CO adsorption and selective separation. The authors investigate the effects of variations in the adsorbent's stacked pore structure, functional groups, temperature, and gas flow rate on the dynamic CO adsorption capacity, as well as the CO / CH and CO / N selective separation performance. This adsorbent is expected to be applicable in the field of practical CO adsorption and separation, demonstrating its significant research value and potential application prospects. Summary of the Invention

[0005] The purpose of the present invention is to provide a simple and efficient preparation method and use of imidazole aromatic hydrocarbon-impregnated silicon carbon dioxide adsorption material, and to develop new types of imidazole aromatic hydrocarbon adsorbents. The imidazole aromatic hydrocarbon-impregnated silicon adsorption material prepared by this method has high adsorption performance and separation selectivity for CO2.

[0006] 1. Preparation of Imidazole-coated Arene-impregnated Silicon Carbon Dioxide Adsorption Materials

[0007] (1) 1,4-Benzenediol and ethylene dibromide were refluxed in the presence of potassium hydroxide and potassium iodide as catalysts and acetonitrile as solvent at 75-80°C for 20-24 hours. The solid obtained after vacuum distillation was purified by column chromatography to obtain 1,4-bis(2-bromoethoxy)benzene.

[0008] The molar ratio of 1,4-benzenediol to ethylene dibromide is 1:2-1:3; the molar ratio of 1,4-benzenediol to potassium hydroxide is 1:1-1:1.5; and the molar ratio of 1,4-benzenediol to potassium iodide is 1:2-1:2.5.

[0009] (2) 1, 4-bis(2-bromoethoxy)benzene was used as a structural module, boron trifluoride etherate was used as a catalyst, paraformaldehyde was used as a bridging polymerization agent, and dry 1, 2-dichloromethane was used as a reaction solvent. The reaction was carried out at room temperature under a nitrogen atmosphere for 1.5 to 2.0 hours. After the reaction was completed, methanol was poured into the reaction chamber to terminate the reaction. The reaction was extracted with water and a saturated sodium bicarbonate solution. The organic phase was dried over anhydrous magnesium sulfate. The solid obtained after vacuum distillation was then subjected to column chromatography to obtain brominated columnar aromatic hydrocarbons substituted with bromoethoxy.

[0010] The mass ratio of boron trifluoride etherate to 1, 4-bis(2-bromoethoxy)benzene is 1:1 to 1:1.5; the mass ratio of 1, 4-bis(2-bromoethoxy)benzene to paraformaldehyde is 1:0.5 to 1:1.0.

[0011] The synthesis and structure of bromoethoxy-substituted brominated pillar aromatics are as follows:

[0012]

[0013] (3) The bromoethoxy-substituted brominated pillar arene and 2-aminoimidazole are dissolved in an acetone-acetonitrile mixed solvent, diethylamine is used as a catalyst, and the reaction is carried out at 85-90°C for 10-12 hours. After the reaction is completed, the 2-aminoimidazole-modified pillar arene is directly distilled under reduced pressure to obtain the 2-aminoimidazole-modified pillar arene. The molar ratio of the bromoethoxy-substituted brominated pillar arene to 2-aminoimidazole is 1:10-1:15. The acetone-acetonitrile mixed solvent is a 1:1 volume ratio of acetone to acetonitrile.

[0014] The synthesis and structure of 2-aminoimidazole modified pillararenes are as follows:

[0015]

[0016] (4) Dissolve the 2-aminoimidazole-modified pillar aromatic hydrocarbon in an acetone-acetonitrile solution, disperse the porous silica in the solution, impregnate it at room temperature and pressure for 10-12 hours, and then dry it to complete the impregnation. Repeat the impregnation process twice. Finally, the obtained solid material is dried, calcined, and sieved with 20-40 mesh to obtain the imidazole pillar aromatic hydrocarbon-impregnated silicon carbon dioxide adsorption material.

[0017] The mass concentration of 2-aminoimidazole-modified pillar arene in the acetone-acetonitrile solution is 30% to 40%, the mass ratio of 2-aminoimidazole-modified pillar arene to porous silica is 1:3 to 1:5, and the volume ratio of acetone to acetonitrile in the acetone-acetonitrile solution is 1:1.

[0018] 2. Characterization of Imidazole Pillar Arene-Impregnated Silicon Carbon Dioxide Adsorption Materials

[0019] Infrared spectrum of imidazole aromatic hydrocarbon impregnated silicon carbon dioxide adsorption material Figure 3 As shown, 3550~3300 cm -1 A broad peak at 3432 cm -1 The wavenumbers are assigned to the stretching vibration peaks of 2-aminoimidazole N−H and Si−OH, 2929 and 2852 cm −1 The characteristic peaks at 1645 cm-1 belong to the symmetric and asymmetric stretching vibrations corresponding to the C-H bonds in the alkyl chain. -1 The characteristic peak at 1511 cm is the -C=N double bond stretching vibration peak of the imidazole ring in the 2-aminoimidazole structure, and the peak at 1511 cm -1 The characteristic peak at 1415 cm is attributed to the C=C stretching vibration peak of the imidazole ring in the 2-aminoimidazole structure of the imidazole-modified column aromatic hydrocarbon impregnated silicon-based adsorbent material. -1 The characteristic peaks at 1096, 806 and 462 cm-1 belong to the N-H deformation vibration peaks of aliphatic secondary amines. −1 These characteristic peaks are attributed to the vibration peaks of Si−O−Si bonds. The above infrared data confirm the successful preparation of imidazole-modified pillar aromatic hydrocarbon-impregnated silicon-based adsorption materials.

[0020] Scanning electron microscopy of imidazole-coated aromatic hydrocarbon-impregnated silicon carbon dioxide adsorption material Figure 4 As shown in the figure, the imidazole-modified columnar aromatic hydrocarbon-impregnated silica gel material exhibits a morphology of stacked silica spheres and a rough surface, indicating the successful preparation of the material.

[0021] Thermogravimetric analysis of imidazole-modified aromatic hydrocarbon-impregnated silica-based adsorption materials Figure 5Thermogravimetric analysis shows that SiO2 exhibits high thermal stability under a nitrogen atmosphere, with a weight loss of only 6% even when heated to 750°C. Pillarene-impregnated silica gel and imidazole-modified pillararene-impregnated silica gel also exhibit excellent thermal stability, with the most rapid weight loss occurring between 260°C and 750°C. This is likely due to the decomposition, combustion, and volatilization of the pillararene or imidazole groups in the adsorbent. The final weight loss rates for the pillararene-impregnated silica gel and imidazole-modified pillararene-impregnated silica gel were 11% and 17%, respectively.

[0022] The N2 adsorption / desorption and BJH pore size distribution spectra of the imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorbent material are shown in the figure. Figure 6 The test results show that the imidazole-modified aromatic hydrocarbon-impregnated silicon-based adsorbent material has a typical type IV N2 desorption curve and a surface area of ​​240 m² / g, which is lower than that of the SiO2 porous material (261 m² / g). This indicates that the imidazole-impregnated aromatic hydrocarbon-impregnated silicon carbon dioxide adsorbent material has a mesoporous structure and was successfully prepared.

[0023] 3. Application of High-efficiency Adsorption and Selective Separation of Carbon Dioxide

[0024] Gas flow rate is closely related to mass transfer and is an important factor affecting the adsorption capacity of porous solid materials. The gas flow rate of imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorption material was investigated ( Figure 7 ), dynamic CO2 adsorption experiments were conducted on 0.2 g of the material in a fixed bed at atmospheric pressure and 30°C. The adsorption experiments showed that as the gas flow rate increased from 10 to 40 ml / min, both the CO2 saturation adsorption time and the breakthrough process time decreased. At a gas flow rate of 10 ml / min, the adsorbent's dynamic saturation adsorption capacity reached a maximum of 6.6 mmol / g. With further increases in gas flow rate, the saturation adsorption capacity of the material decreased. At this point, the amino groups on the surface of the imidazole-columned aromatic hydrocarbon-impregnated silicon CO2 adsorption material had fully reacted with CO2 to form a stable structure. This increased CO2 mass transfer resistance made further reaction difficult, and the shortened contact time reduced the CO2 saturation adsorption capacity.

[0025] Temperature has a significant effect on the dynamic adsorption capacity of CO2. Figure 8 The effect of the adsorption temperature range of 30–60°C on the dynamic CO2 adsorption performance of the adsorbent material was investigated at a flow rate of 10 ml / min for a sample of 0.2 g. The experimental data showed that the saturated CO2 adsorption capacity increased with increasing temperature, reaching 6.8 mmol / g at 40°C. However, further increases in temperature resulted in a decrease in the adsorption capacity, suggesting that CO2 adsorption by the material may be a kinetically controlled process. As the temperature continues to rise, CO2 desorption from the adsorption sites within the pores may become more prioritized, leading to a decrease in CO2 adsorption.

[0026] like Figure 9 As shown in Figure 2, the effect of adsorbent material dosage on CO2 adsorption performance was investigated at 40°C and a flow rate of 10 ml / min. The experimental results show that as the mass of the imidazole-coated aromatic silicon CO2 adsorbent material increases from 0.2 to 0.8 g, the breakthrough time gradually decreases and the CO2 saturation adsorption capacity decreases, indicating that the adsorption capacity of the material for acidic gases may be related to the amine ratio. Therefore, a certain amount of adsorbent material enhances CO2 adsorption capacity, resulting in a dominant adsorption mode. As the adsorbent material column height increases, the diffusion resistance of CO2 through the adsorbent material increases, thereby reducing CO2 capacity.

[0027] In addition, the adsorption capacity of SiO2, pillar aromatics impregnated silica gel and imidazole pillar aromatics impregnated silica adsorbent materials for CO2 was compared. Figure 10 As shown in the figure, it was found that the imidazole pillar arene impregnated silicon adsorbent material had the highest saturated adsorption capacity for CO2. This indicates that the bonding of 2-aminoimidazole to the pillar arene greatly improved the adsorption capacity of CO2, indicating that the brominated pillar arene substituted with bromoethoxy and 2-aminoimidazole jointly improved the adsorption performance of CO2.

[0028] In order to further evaluate the actual separation performance of imidazole column aromatic hydrocarbon impregnated silicon adsorbent, dynamic separation selectivity experiments were conducted to evaluate the effect of optimal conditions on the dynamic adsorption selectivity of CO2 / CH4 and CO2 / N2. Figure 11 、 12 As shown in the figure, during the entire adsorption process, the breakthrough time of CO2 is longer than that of CH4 and N2, indicating that the adsorption capacity of CO2 is strong. The breakthrough curve shows that the imidazole column aromatic hydrocarbon impregnated silicon adsorbent has good separation potential for CO2, CH4 and N2.

[0029] In order to further explore the practical industrial application prospects and application value of imidazole column aromatic hydrocarbon impregnated silicon adsorbent materials, a continuous CO2 dynamic adsorption evaluation of cyclic regeneration performance was conducted. Specifically, a binary CO2 / Ar standard with a volume ratio of 5% was used for cyclic regeneration performance evaluation. CO2 was dynamically adsorbed at an adsorption temperature of 40°C, and then a desorption cycle experiment was carried out at a temperature of 110°C with pure argon as the carrier gas at a flow rate of 15 ml / min. From the cyclic adsorption and desorption CO2 adsorption capacity data, it can be concluded that ( Figure 13 After 15 consecutive adsorption cycles, the adsorbent reached a saturated adsorption capacity of 6.0 mmol / g. These results demonstrate that the imidazole-pillararene-impregnated silicon adsorbent prepared by 2-aminoimidazole-modified pillararene exhibits excellent recyclability.

[0030] In summary, the present invention proposes a simple and efficient new preparation method and new use of an imidazole aromatic hydrocarbon impregnated silicon carbon dioxide adsorbent material. Under nitrogen protection, the present invention uses 1,4-diphenol derivative 1,4-bis(2-bromoethoxy)benzene as a structural module to prepare a bromoethoxy-substituted brominated aromatic hydrocarbon raw material. The porous silicon is then dispersed in an acetone-acetonitrile solution containing bromoethoxy-substituted brominated aromatic hydrocarbons, and the imidazole aromatic hydrocarbon impregnated silicon carbon dioxide adsorbent material is prepared by multiple impregnation methods. The adsorption capacity of the imidazole aromatic hydrocarbon impregnated silicon adsorbent material for CO2 is 6.8 mmol / g. The changes in the pore structure of the imidazole aromatic hydrocarbon impregnated silicon adsorbent material, the CO2 adsorption performance, and the effects on the dynamic adsorption of CO2 and the selective separation of CO2 / CH4 and CO2 / N2 are studied. This indicates that the introduction of 2-aminoimidazole in the imidazole pillar aromatic hydrocarbon impregnated silicon adsorbent material provides amine active sites, and the cavity of the pillar aromatic hydrocarbon provides a pore structure that is conducive to adsorption, thereby promoting CO2 adsorption. Moreover, after 15 cycles of regeneration, the dynamic saturated adsorption capacity can still reach 6.0 mmol / g, which is a CO2 adsorption material with research value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the H NMR spectrum of 1,4-bis(2-bromoethoxy)benzene;

[0032] Figure 2 This is the H NMR spectrum of bromoethoxy-substituted brominated columnar aromatic hydrocarbons;

[0033] Figure 3 Infrared spectra of (a) SiO2, (b) brominated pillararene, (c) pillararene impregnated silica gel, and (d) imidazole pillararene impregnated silica adsorption materials;

[0034] Figure 4 This is a scanning electron micrograph of imidazole-coated aromatic hydrocarbon-impregnated silicon adsorbent material;

[0035] Figure 5 Thermogravimetric images of (a) SiO2, (b) pillararene-impregnated silicon and (c) imidazole pillararene-impregnated silicon adsorption materials;

[0036] Figure 6 Nitrogen adsorption / desorption isotherms for imidazole aromatics impregnated silicon adsorbent;

[0037] Figure 7 is the effect of flow rate on the dynamic adsorption performance of CO2;

[0038] Figure 8 The effect of adsorption temperature on CO2 adsorption performance;

[0039] Figure 9 The effect of adsorbent dosage on CO2 adsorption performance;

[0040] Figure 10CO2 adsorption performance of different adsorption materials;

[0041] Figure 11 The CO2 / CH4 selective separation performance of imidazole aromatics impregnated silicon adsorbent (the inset shows the dynamic saturated adsorption capacity);

[0042] Figure 12 The CO2 / N2 selective separation performance of imidazole aromatics impregnated silicon adsorbent (the inset shows the dynamic saturated adsorption capacity);

[0043] Figure 13 The recyclability of imidazole aromatics impregnated silicon adsorbent material for CO2. DETAILED DESCRIPTION

[0044] The present invention will be further described below by way of examples. Example

[0045] (1) 6.5 g (60 mmol) of 1,4-benzenediol, 22.5 g (120 mmol) of ethylene dibromide, 2.4 g (60 mmol) of potassium hydroxide, and 20.0 g (120 mmol) of potassium iodide were added to 400 ml of acetone solution and reacted at 80°C for 24 hours. The mixture was filtered with a fritted funnel and washed with dichloromethane. After filtration, the solution was distilled under reduced pressure, purified by silica gel column chromatography (petroleum ether:dichloromethane, 20 / 1, v / v), and dried in vacuo to obtain 1,4-bis(2-bromoethoxy)benzene. The NMR data of 1, 4-bis(2-bromoethoxy)benzene are δ(ppm):6.79 (s, 4H), 4.18 (t, J = 6.0 Hz, 4H), 3.54 (t, J =6.0 Hz, 4H), proving the successful synthesis of 1, 4-bis(2-bromoethoxy)benzene. The NMR spectrum is shown in Figure 2. Figure 1 shown.

[0046] (2) 3.5 g (10 mmol) of 1,4-bis(2-bromoethoxy)benzene, 2.86 g (20 mmol) of boron trifluoride etherate, and 1.0 g of paraformaldehyde were added to 60 ml of 1,2-dichloromethane and reacted at room temperature for 2.0 hours. After the reaction, 80-100 ml of methanol was poured into the reaction mixture to quench the reaction. The reaction mixture was washed with 30-40 ml of water and 20-30 ml of saturated sodium bicarbonate solution. The organic layer was then dried over 15-20 g of anhydrous magnesium sulfate and the organic solvent was removed by vacuum distillation. The bromoethoxy-substituted brominated aromatic hydrocarbon was obtained by column chromatography using petroleum ether:dichloromethane (10:1, volume ratio). The NMR δ(ppm) of bromoethoxy-substituted brominated pillar aromatic hydrocarbons was 6.91 (s, 10H), 4.23 (t, J = 6.0 Hz, 20H), 3.84 (s, 10H), 3.63 (t, J =4.0 Hz, 20H), which proved the successful synthesis of bromoethoxy-substituted brominated pillar aromatic hydrocarbons. Figure 2 shown.

[0047] (3) 1.6 g (1.0 mmol) of bromoethoxy-substituted brominated pillar arene and 0.9 g (10 mmol) of 2-aminoimidazole were dissolved in 50 ml of acetone-acetonitrile mixed solvent (volume ratio 1:1), 0.1 g of diethylamine was used as a catalyst, and the reaction was carried out at 85 °C for 12 hours. After the reaction, the reaction was directly distilled under reduced pressure to obtain 2-aminoimidazole-modified pillar arene. Then, 0.2 g of 2-aminoimidazole-modified pillar arene was dissolved in 80 ml of acetone-acetonitrile solution (volume ratio 1:1), 2.5 g of porous silica was dispersed in the solution, and the mixture was precipitated and impregnated at room temperature and pressure for 12 hours, followed by drying to complete the impregnation. The impregnation process was repeated twice, and a total of 0.6 g of 2-aminoimidazole-modified pillar arene was used. Finally, the obtained solid material was dried, calcined, and sieved with 20-40 mesh to obtain imidazole pillar arene-impregnated silicon carbon dioxide adsorption material.

Claims

1. A method for preparing an imidazole column aromatic hydrocarbon-impregnated silicon carbon dioxide adsorption material, comprising the following steps: (1) 1,4-benzenediol and ethylene dibromide are refluxed in the presence of potassium hydroxide and potassium iodide as catalysts and acetonitrile as solvent at 75-80°C for 20-24 hours. The solid obtained after vacuum distillation is purified by column chromatography to obtain 1,4-bis(2-bromoethoxy)benzene; (2) 1, 4-bis(2-bromoethoxy)benzene is used as a structural module, boron trifluoride etherate is used as a catalyst, paraformaldehyde is used as a bridging polymerization agent, and dry 1, 2-dichloromethane is used as a reaction solvent. The reaction is carried out at room temperature under a nitrogen atmosphere for 1.5 to 2.0 hours. After the reaction is completed, methanol is poured into the reaction chamber to terminate the reaction. The reaction is extracted with water and a saturated sodium bicarbonate solution. The organic phase is dried over anhydrous magnesium sulfate. The solid obtained after vacuum distillation is subjected to column chromatography to obtain a bromoethoxy-substituted brominated columnar aromatic hydrocarbon. (3) The brominated pillar arene substituted with bromoethoxy and 2-aminoimidazole were dissolved in an acetone-acetonitrile mixed solvent, diethylamine was used as a catalyst, and the reaction was carried out at 85-90 °C for 10-12 hours. After the reaction was completed, the 2-aminoimidazole-modified pillar arene was obtained by direct vacuum distillation. (4) 2-aminoimidazole modified columnar aromatic hydrocarbon is dissolved in acetone-acetonitrile solution, porous silica is dispersed in the solution, and the mixture is impregnated at room temperature and pressure for 10 to 12 hours and then dried to complete the impregnation. The impregnation process is repeated twice. Finally, the obtained solid material is dried, calcined, and sieved to obtain imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorption material.

2. The method for preparing the imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorbent material according to claim 1, characterized in that: In step (1), the molar ratio of 1,4-benzenediol to ethylene dibromide is 1:2 to 1:3; the molar ratio of 1,4-benzenediol to potassium hydroxide is 1:1 to 1:1.5; and the molar ratio of 1,4-benzenediol to potassium iodide is 1:2 to 1:2.

5.

3. The method for preparing the imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorbent material according to claim 1, characterized in that: In step (2), the mass ratio of boron trifluoride etherate to 1,4-bis(2-bromoethoxy)benzene is 1:1 to 1:1.5; the mass ratio of 1,4-bis(2-bromoethoxy)benzene to paraformaldehyde is 1:0.5 to 1:1.

0.

4. The method for preparing the imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorbent material according to claim 1, characterized in that: In step (3), the molar ratio of the brominated pillar aromatic hydrocarbon substituted with bromoethoxy to 2-aminoimidazole is 1:10 to 1:

15.

5. The method for preparing the imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorbent material according to claim 1, characterized in that: In step (3), the acetone-acetonitrile mixed solvent has a volume ratio of acetone to acetonitrile of 1:

1.

6. The method for preparing the imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorbent material according to claim 1, characterized in that: In step (4), the mass concentration of 2-aminoimidazole-modified pillar aromatic hydrocarbon in the acetone-acetonitrile solution is 30% to 40%; the mass ratio of 2-aminoimidazole-modified pillar aromatic hydrocarbon to porous silica is 1:3 to 1:

5.

7. The method for preparing the imidazole column aromatic hydrocarbon impregnated silicon carbon dioxide adsorbent material according to claim 1, characterized in that: In step (4), the volume ratio of acetone to acetonitrile in the acetone-acetonitrile solution is 1:

1.

8. Use of the imidazole pillar aromatic hydrocarbon-impregnated silicon carbon dioxide adsorption material prepared by the method according to claim 1 in the selective adsorption of carbon dioxide.

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