A carbon dioxide adsorbent material that is easy to dissociate and regenerate

Abstract

This invention discloses a carbon dioxide adsorbent material that is easy to dissociate and regenerate. Its main effective phase component is a graphite-like carbon nitride / Al2O3 / CuO phase. This invention has the following advantages: 1. It improves the capture rate of low-concentration carbon dioxide indoors, reducing the time required for capture and purification; 2. It reduces the energy consumption and indirect carbon emissions caused by the adsorbent dissociation and regeneration process; 3. It increases the capture-regeneration cycle frequency of the carbon dioxide adsorbent, achieving long-term indoor carbon dioxide purification.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a carbon dioxide adsorption material that is easy to dissociate and regenerate. Background Technology

[0002] Carbon dioxide emitted by indoor occupants is a significant component of building carbon emissions, and excessive carbon dioxide can also harm the health of indoor occupants. To improve indoor air quality, adsorption methods are needed to capture and fix the carbon dioxide produced by indoor occupants' respiration.

[0003] There are many patented technologies concerning carbon dioxide adsorption materials in the existing technology. For example, CN117772124A disclosed a high-efficiency solid atmospheric carbon capture material and its preparation method and application. CN117772164A disclosed a high-temperature regeneration system and method for porous adsorbents. CN117718000A disclosed a method for synthesizing spherical nano-calcium-based carbon dioxide adsorbents. CN117680097A disclosed a carbon dioxide absorbent and its preparation method. However, since most existing patents and corresponding research focus on improving carbon dioxide capture capacity (the amount of carbon dioxide that a unit of adsorbent can capture) and capture intensity (the change in the adsorbent's carbon dioxide capture capacity with increasing temperature), they neglect the subsequent adsorbent dissociation and regeneration process. Therefore, existing adsorbents often need to be heated to above 100 ℃ after saturation to complete dissociation and regeneration, which requires high energy consumption and indirectly causes significant carbon emissions. Therefore, existing indoor carbon dioxide adsorbents are not suitable for repeated recycling.

[0004] Therefore, how to provide an adsorption material that has a high indoor carbon dioxide capture rate and low dissociation and regeneration energy consumption to achieve long-term indoor carbon dioxide purification has become a problem that needs to be considered and solved by those skilled in the art. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a carbon dioxide adsorbent material that can have a high indoor carbon dioxide capture rate and can improve the carbon dioxide capture-regeneration cycle frequency, so as to achieve a long-term indoor carbon dioxide purification effect.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A carbon dioxide adsorbent material that is easy to dissociate and regenerate is characterized in that the main effective phase component of the adsorbent material is a graphitic carbon nitride / Al2O3 / CuO phase.

[0008] The graphite-like carbon nitride / Al2O3 / CuO phase refers to a porous phase composition with graphite-like carbon nitride material as the matrix and Al2O3 and CuO components bonded together by chemical bonds. When used, this material can achieve rapid adsorption of carbon dioxide. The principle is as follows: First, graphite-like carbon nitride is a novel photocatalytic material with a porous layered structure similar to graphite. It has a large specific surface area and abundant active sites, especially the carbon atom sites and some nitrogen atom sites on the surface, which can be directly used to adsorb carbon dioxide, exhibiting high adsorption strength. Second, for the remaining nitrogen atom sites with lower carbon dioxide adsorption strength, the intercalation of Al2O3 and CuO can introduce metal active electrons, improving the lack of electrons around these nitrogen atom sites, thereby restoring / releasing the corresponding carbon dioxide adsorption potential. Furthermore, and more fundamentally, carbon dioxide directly adsorbed onto the nitrogen and carbon atoms of the graphitic carbon nitride surface is a strong chemisorption, with high adsorption intensity, but requiring high dissociation temperatures and energy consumption. Carbon dioxide directly adsorbed onto the oxygen atom sites on the Al₂O₃ and CuO surfaces is a weak physisorption, and the adsorbed carbon dioxide is easily released back into the air. By embedding Al₂O₃ and CuO into the graphitic carbon nitride surface, the delocalized π-orbital electrons on the graphitic carbon nitride surface can be redistributed and aggregated in the Al₂O₃ / CuO region, thereby weakening the carbon dioxide adsorption intensity at the carbon and nitrogen sites and enhancing the carbon dioxide adsorption intensity at the oxygen atom sites in the Al₂O₃ / CuO region. Therefore, in summary, the above process can achieve high adsorption intensity across the entire surface of the graphitic carbon nitride / Al₂O₃ / CuO phase, while also facilitating subsequent dissociation and regeneration.

[0009] Furthermore, the adsorbent material is composed of the following phase materials in the following mass proportions: 0.01-0.1 parts of pure graphitic carbon nitride phase, 0.05-0.25 parts of Al2O3 phase, 0.07-0.30 parts of CuO phase, 0.03-0.15 parts of graphitic carbon nitride / Al2O3 phase, 0.05-0.18 parts of graphitic carbon nitride / CuO phase, and 0.02-0.79 parts of graphitic carbon nitride / Al2O3 / CuO phase.

[0010] Furthermore, the optimal proportions are: 0.01 parts of pure graphitic carbon nitride phase, 0.05 parts of Al2O3 phase, 0.1 parts of CuO phase, 0.03 parts of graphitic carbon nitride / Al2O3 phase, 0.05 parts of graphitic carbon nitride / CuO phase, and 0.76 parts of graphitic carbon nitride / Al2O3 / CuO phase.

[0011] In the above material composition, the graphitic carbon nitride / Al2O3 / CuO phase is the main effective component of the adsorbent material. This phase is the primary site for carbon dioxide capture and dissociation, hence its largest proportion. The remaining phases are preparation byproducts and constitute a smaller proportion. Their uniform mixing with the main effective component better ensures the stability of the material's phase structure. Simultaneously, as common reaction products, these other phases can provide a certain dynamic conversion and replenishment effect after the main effective component is converted and consumed, further ensuring the persistence of the adsorption effect. Furthermore, the Al2O3 and CuO phases in the material can act as heat conduction enhancing media, facilitating dissociation and regeneration after use.

[0012] The adsorption reaction process of this adsorbent material for carbon dioxide includes: the reaction of carbon dioxide with carbon and nitrogen atoms on the surface of the graphitic carbon nitride phase: CO2 + N···C / N···C → N···[C / N···O -• C •- O] ···C, in which the adsorbed carbon dioxide has a V-shaped structure; carbon dioxide is fixed by reaction with Al2O3 and CuO: CO2 + Al2O3 → Al2(CO3)3, CO2 + CuO → CuCO3

[0013] After adsorbing carbon dioxide, this adsorbent material can be easily and rapidly regenerated through dissociation. The dissociation and regeneration process is as follows: place the saturated adsorbent in a forced-air drying oven at a temperature of 50-150 ℃ (approximately 70 ℃ for 50% dissociation and approximately 115 ℃ for 90% dissociation), and continue drying for 2.5 h to achieve dissociation and regeneration. After completion, the material can be removed for precise weighing and Fourier transform infrared spectroscopy analysis to determine whether CO2 is still adsorbed on the surface of the regenerated adsorbent and the amount of residual CO2. The principle behind rapid dissociation is as follows: First, the surface of the graphitic carbon nitride / Al2O3 / CuO phase maintains a near-two-dimensional morphological structure. During external heating, the input heat can be transferred across the entire surface through nitrogen-carbon chemical bond vibrations and delocalized π-bond phonons, achieving basic carbon dioxide dissociation. Simultaneously, since the embedded Al2O3 and CuO belong to the trigonal and simple monoclinic crystal systems, respectively, and have 1211.2-9600 cm⁻¹ crystal structures, respectively... -1 and 557-733 cm -1The vibration constants of the two phases can be superimposed through different vibration models to transfer dissociation heat to the surface of the graphitic carbon nitride, enhancing its heat transfer rate and increasing its multidimensional vibration amplitude, thereby weakening the vibrational inertia of the carbon dioxide dissociation process and lowering the carbon dioxide dissociation energy barrier. Furthermore, the Al2O3 and CuO phases individually loaded on the surface of the graphitic carbon nitride can cooperate as a heat conduction enhancement medium. That is, as the temperature rises (the dissociation temperature is higher than the adsorption process temperature), the thermal conductivity of the Al2O3 phase remains at 25-30 W / (m·K), while the thermal conductivity of the CuO phase can increase to 200-400 W / (m·K). Therefore, the Al2O3 phase region becomes a heat concentration region, and the CuO phase region becomes a heat diffusion region. A directional heat conduction path is formed between the Al2O3 and CuO phases. The heat transfer on the surface of the graphitic carbon nitride located on this directional heat conduction path is further enhanced, and the corresponding carbon dioxide dissociation becomes easier.

[0014] Furthermore, the adsorbent material is prepared using the following steps:

[0015] Step 1: Weigh 0.5 mol or a multiple thereof of melamine (C3H6N6, preferably analytical grade 98.0%) and place it in a calcination apparatus (preferably an aluminum crucible). Heat the melamine from room temperature to 500-600℃ (preferably 550℃) at a rate of 8-12℃ / min (preferably 10℃ / min) and continue calcining in air for 1.5-2.5h (preferably 2h). Then allow it to cool to room temperature under natural ventilation to obtain a light yellow blocky object. Grind the blocky object into a powder passing through 200 mesh.

[0016] Step 2: Pour the above 200-mesh powder into 500 ml or an equivalent amount of deionized water for dispersion treatment (preferably using an ultrasonic cleaner for dispersion, ultrasonic treatment time 1 h) to obtain a pale yellow suspension.

[0017] Step 3: Add 0.15 mol or an equivalent multiple of aluminum nitrate nonahydrate (Al(NO3)3·9H2O) and 0.25 mol or an equivalent multiple of copper nitrate hemipentahydrate (Cu(NO3)2·2.5H2O) to the above pale yellow suspension, and then stir thoroughly to mix evenly (preferably by stirring continuously at 50 °C and 100 r / min for 3 h in a magnetic stirrer). Then dry thoroughly in a drying oven (preferably by evaporating at 80 °C for 24 h) to obtain a pale yellow / pale blue block; then grind it further into a pale yellow / pale blue powder passing through 200 mesh.

[0018] Step 4: Place the above-mentioned light yellow / light blue powder in a calcination apparatus (preferably an aluminum crucible), heat it from room temperature to 500-600℃ (preferably 550℃) at a rate of 8-12℃ / min (preferably 10℃ / min), and continue calcining it under a protective atmosphere (preferably an argon atmosphere) for 1.5-2.5h (preferably 2h). Then, allow it to cool to room temperature naturally to obtain the final desired adsorbent powder.

[0019] The reaction principle involved in the above preparation steps is as follows: In step 1, melamine calcination reacts with oxygen to generate pure graphite-like carbon nitride, with the reaction equation: C3H6N6 + O2 → C3N4 + H2O; In step 4, aluminum nitrate and copper nitrate adhering to the surface of the pure graphite-like carbon nitride decompose to generate corresponding metal oxides and embed into the graphite-like carbon nitride to form a composite adsorbent. The decomposition reactions of aluminum nitrate and copper nitrate are Al(NO3)3 → Al2O3 + NO2 + O2 and Cu(NO3)2 → CuO + NO2 + O2. The reaction process of aluminum oxide / copper oxide embedding into the graphite-like carbon nitride is C3N4 + Al2O3 + CuO → NC···Al2O3···C···N···CuO···N···C···NC. Therefore, the above steps can conveniently and quickly prepare the carbon dioxide adsorbent material, and ensure that the phase composition of the material is uniformly mixed and the adsorption quality is stable and reliable.

[0020] According to the applicant's test verification, the carbon dioxide adsorption material prepared by this invention has a carbon dioxide adsorption intensity difference of no more than 20% at different sites; the average adsorption rate of carbon dioxide is increased from 0.001 mol / (min·g) to about 0.0035 mol / (min·g); the temperature required for 50% dissociation of carbon dioxide is reduced to about 70℃, and the temperature required for 90% dissociation is reduced to about 115℃.

[0021] The present invention has the following advantages: 1. It improves the indoor low-concentration carbon dioxide capture rate and reduces the time required for capture and purification; 2. It reduces the energy consumption required for the adsorbent dissociation and regeneration process and the indirect carbon emissions; 3. It increases the capture-regeneration cycle frequency of carbon dioxide adsorbent, and realizes long-term indoor carbon dioxide purification. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the adsorption principle of the adsorption material of the present invention.

[0023] Figure 2 This is a schematic diagram comparing the adsorption effects of the adsorption material of the present invention with those of three other adsorption materials of different phases.

[0024] Figure 3This is a schematic diagram comparing the equivalent dissociation temperatures of the adsorbent material of the present invention and three other adsorbent materials of different phases under two different dissociation degree requirements. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to specific embodiments.

[0026] Implementation method: A carbon dioxide adsorbent material that is easy to dissociate and regenerate, characterized in that the main effective phase component of the adsorbent material is a graphite-like carbon nitride / Al2O3 / CuO phase.

[0027] The graphite-like carbon nitride / Al₂O₃ / CuO phase refers to a porous phase composition with graphite-like carbon nitride material as the matrix, simultaneously incorporating Al₂O₃ and CuO components through chemical bonding. This material enables rapid adsorption of carbon dioxide during use, for the following reasons: [See details]. Figure 1 First, graphitic carbon nitride is a novel photocatalytic material with a porous, layered structure similar to graphite. It has a large specific surface area and abundant active sites, particularly the carbon and some nitrogen atom sites on its surface, which can directly adsorb carbon dioxide with high adsorption strength. Second, for the remaining nitrogen atom sites with lower carbon dioxide adsorption strength, the intercalation of Al2O3 and CuO can introduce metal active electrons, improving the lack of electrons around these nitrogen atom sites and thus restoring / releasing the corresponding carbon dioxide adsorption potential. Furthermore, and more fundamentally, the direct adsorption of nitrogen and carbon atoms on the surface of graphitic carbon nitride by carbon dioxide is a strong chemisorption, with high adsorption strength but requiring high dissociation temperatures and energy consumption. In contrast, the direct adsorption of carbon dioxide on oxygen atom sites on the Al2O3 and CuO surfaces is a weak physisorption, and the adsorbed carbon dioxide is easily released back into the air. By embedding Al2O3 and CuO into the surface of graphitic carbon nitride, the delocalized π-orbital electrons on the surface of graphitic carbon nitride can be redistributed and aggregated in the Al2O3 / CuO region, thereby weakening the carbon dioxide adsorption intensity at carbon and nitrogen sites and enhancing the carbon dioxide adsorption intensity at oxygen sites in the Al2O3 / CuO region. Therefore, in summary, the above process can achieve high adsorption intensity across the entire surface of the graphitic carbon nitride / Al2O3 / CuO phase, while also facilitating subsequent dissociation and regeneration.

[0028] The adsorbent material is composed of the following phase materials in the following mass proportions: 0.01-0.1 parts of pure graphitic carbon nitride phase, 0.05-0.25 parts of Al2O3 phase, 0.07-0.30 parts of CuO phase, 0.03-0.15 parts of graphitic carbon nitride / Al2O3 phase, 0.05-0.18 parts of graphitic carbon nitride / CuO phase, and 0.02-0.79 parts of graphitic carbon nitride / Al2O3 / CuO phase.

[0029] The optimal proportions are: 0.01 parts of pure graphitic carbon nitride phase, 0.05 parts of Al2O3 phase, 0.1 parts of CuO phase, 0.03 parts of graphitic carbon nitride / Al2O3 phase, 0.05 parts of graphitic carbon nitride / CuO phase, and 0.76 parts of graphitic carbon nitride / Al2O3 / CuO phase.

[0030] In the above material composition, the graphitic carbon nitride / Al2O3 / CuO phase is the main effective component of the adsorbent material. This phase is the primary site for carbon dioxide capture and dissociation, hence its largest proportion. The remaining phases are preparation byproducts and constitute a smaller proportion. Their uniform mixing with the main effective component better ensures the stability of the material's phase structure. Simultaneously, as common reaction products, these other phases can provide a certain dynamic conversion and replenishment effect after the main effective component is converted and consumed, further ensuring the persistence of the adsorption effect. Furthermore, the Al2O3 and CuO phases in the material can act as heat conduction enhancing media, facilitating dissociation and regeneration after use.

[0031] The adsorption reaction process of this adsorbent material for carbon dioxide includes: the reaction of carbon dioxide with carbon and nitrogen atoms on the surface of the graphitic carbon nitride phase: CO2 + N···C / N···C → N···[C / N···O -• C •- O] ···C, in which the adsorbed carbon dioxide has a V-shaped structure; carbon dioxide is fixed by reaction with Al2O3 and CuO: CO2 + Al2O3 → Al2(CO3)3, CO2 + CuO → CuCO3

[0032] After adsorbing carbon dioxide, this adsorbent material can be easily and rapidly regenerated through dissociation. The dissociation and regeneration process is as follows: place the saturated adsorbent in a forced-air drying oven at a temperature of 50-150 ℃ (approximately 70 ℃ for 50% dissociation and approximately 115 ℃ for 90% dissociation), and continue drying for 2.5 h to achieve dissociation and regeneration. After completion, the material can be removed for precise weighing and Fourier transform infrared spectroscopy analysis to determine whether CO2 is still adsorbed on the surface of the regenerated adsorbent and the amount of residual CO2. The principle behind rapid dissociation is as follows: First, the surface of the graphitic carbon nitride / Al2O3 / CuO phase maintains a near-two-dimensional morphological structure. During external heating, the input heat can be transferred across the entire surface through nitrogen-carbon chemical bond vibrations and delocalized π-bond phonons, achieving basic carbon dioxide dissociation. Simultaneously, since the embedded Al2O3 and CuO belong to the trigonal and simple monoclinic crystal systems, respectively, and have 1211.2-9600 cm⁻¹ crystal structures, respectively... -1 and 557-733 cm -1 The vibration constants of the two phases can be superimposed through different vibration models to transfer dissociation heat to the surface of the graphitic carbon nitride, enhancing its heat transfer rate and increasing its multidimensional vibration amplitude, thereby weakening the vibrational inertia of the carbon dioxide dissociation process and lowering the carbon dioxide dissociation energy barrier. Furthermore, the Al2O3 and CuO phases individually loaded on the surface of the graphitic carbon nitride can cooperate as a heat conduction enhancement medium. That is, as the temperature rises (the dissociation temperature is higher than the adsorption process temperature), the thermal conductivity of the Al2O3 phase remains at 25-30 W / (m·K), while the thermal conductivity of the CuO phase can increase to 200-400 W / (m·K). Therefore, the Al2O3 phase region becomes a heat concentration region, and the CuO phase region becomes a heat diffusion region. A directional heat conduction path is formed between the Al2O3 and CuO phases. The heat transfer on the surface of the graphitic carbon nitride located on this directional heat conduction path is further enhanced, and the corresponding carbon dioxide dissociation becomes easier.

[0033] In practice, the adsorbent material is prepared using the following steps:

[0034] Step 1: Weigh 0.5 mol or a multiple of melamine (C3H6N6, specifically 98.0% analytical grade) and place it in a calcination apparatus (specifically an aluminum crucible). Heat the melamine from room temperature to 550°C at a rate of 10°C / min and continue calcining in air for 2 hours. Then allow it to cool to room temperature under natural ventilation to obtain a light yellow blocky object. Grind the blocky object into a powder passing through 200 mesh.

[0035] Step 2: Pour the above 200-mesh powder into 500 ml or an equivalent amount of deionized water, disperse it using an ultrasonic cleaner, and ultrasonically treat it for 1 hour to obtain a pale yellow suspension.

[0036] Step 3: Add 0.15 mol or an equivalent multiple of aluminum nitrate nonahydrate (Al(NO3)3·9H2O) and 0.25 mol or an equivalent multiple of copper nitrate hemipentahydrate (Cu(NO3)2·2.5H2O) to the above pale yellow suspension. Stir continuously in a magnetic stirrer at 50 °C and 100 r / min for 3 h. Then evaporate in a drying oven at 80 °C for 24 h to obtain a pale yellow / pale blue block. Further grind it into a pale yellow / pale blue powder passing through 200 mesh.

[0037] Step 4: Place the above light yellow / light blue powder in a calcination apparatus (specifically an aluminum crucible), heat it from room temperature to 550°C at a rate of 10°C / min, and continue calcining it in an argon (Ar) atmosphere for 2 hours. Then, allow it to cool to room temperature naturally to obtain the final adsorbent powder.

[0038] The reaction principle involved in the above preparation steps is as follows: In step 1, melamine calcination reacts with oxygen to generate pure graphite-like carbon nitride, with the reaction equation: C3H6N6 + O2 → C3N4 + H2O; In step 4, aluminum nitrate and copper nitrate adhering to the surface of the pure graphite-like carbon nitride decompose to generate corresponding metal oxides and embed into the graphite-like carbon nitride to form a composite adsorbent. The decomposition reactions of aluminum nitrate and copper nitrate are Al(NO3)3 → Al2O3 + NO2 + O2 and Cu(NO3)2 → CuO + NO2 + O2. The reaction process of aluminum oxide / copper oxide embedding into the graphite-like carbon nitride is C3N4 + Al2O3 + CuO → NC···Al2O3···C···N···CuO···N···C···NC. Therefore, the above steps can conveniently and quickly prepare the carbon dioxide adsorbent material, and ensure that the phase composition of the material is uniformly mixed and the adsorption quality is stable and reliable.

[0039] See Figure 2 and Figure 3To verify the effectiveness of the materials in this application, the applicant conducted comparative experiments with the above-mentioned materials and three other materials (pure graphitic carbon nitride, graphitic carbon nitride / Al2O3, and graphitic carbon nitride / CuO). (Analysis of the difference in CO2 adsorption intensity at different sites: obtained by combining quantum chemical calculations and molecular dynamics simulations, i.e., modeling based on the structural characterization results of different adsorbents, and then performing simulation calculations under the same parameters as the experimental environment to obtain the adsorption intensity of CO2 at different sites and compare them; CO2 adsorption rate test: different adsorbents were placed in a simulated climate chamber, and adsorption kinetics experiments were conducted at a CO2 concentration of 5000 ppm / 25 ℃ ambient temperature / 101 kPa ambient pressure. The CO2 adsorption amount of the adsorbent was tested at 5 min, 10 min, 30 min and 60 min, and then the average adsorption rate was calculated). According to the applicant's test verification, the carbon dioxide adsorption material prepared by this invention has a carbon dioxide adsorption intensity difference of no more than 20% at different sites; the average adsorption rate of carbon dioxide is increased from 0.001 mol / (min·g) to about 0.0035 mol / (min·g); the temperature required for 50% dissociation of carbon dioxide is reduced to about 70℃, and the temperature required for 90% dissociation is reduced to about 115℃.

[0040] Therefore, the present invention has the following advantages: 1. It improves the indoor low-concentration carbon dioxide capture rate and reduces the time required for capture and purification; 2. It reduces the energy consumption required for the adsorbent dissociation and regeneration process and the indirect carbon emissions; 3. It increases the capture-regeneration cycle frequency of carbon dioxide adsorbent and realizes long-term indoor carbon dioxide purification.

Claims

1. A preparation method of a carbon dioxide adsorption material facilitating dissociation and regeneration, characterized in that, It is prepared by the following preparation steps: Step 1: Weigh 0.5 mol or its multiple of melamine and place it in a calcination device. Heat it from room temperature to 500 - 600 °C at a rate of 8 - 12 °C / min and continuously calcine it for 1.5 - 2.5 h in an air atmosphere. Then, let it cool to room temperature by natural ventilation to obtain a light yellow块状物体 (blocky object). Grind the blocky object into a powder passing through 200 meshes; Step 2: Pour the above powder passing through 200 meshes into 500 ml or its equivalent multiple of deionized water and perform dispersion treatment to obtain a light yellow suspension; Step 3: Pour 0.15 mol or its equivalent multiple of aluminum nitrate nonahydrate and 0.25 mol or its equivalent multiple of copper nitrate hemipentahydrate Cu(NO3)2·2.5H2O into the above light yellow suspension, stir well and mix evenly, and then dry it thoroughly in a drying oven to obtain a light yellow / light blue blocky object; further grind it into a light yellow / light blue powder passing through 200 meshes; Step 4: Place the above light yellow / light blue powder in a calcination device, heat it from room temperature to 500 - 600 °C at a rate of 8 - 12 °C / min and continuously calcine it for 1.5 - 2.5 h under atmosphere protection. Then, let it cool to room temperature by natural ventilation to obtain the final required adsorbent powder.

2. The preparation method of the carbon dioxide adsorption material facilitating dissociation and regeneration according to claim 1, wherein In Step 1, the melamine adopts the analytical pure 98.0% specification.

3. The preparation method of the carbon dioxide adsorption material facilitating dissociation and regeneration according to claim 1, wherein In Steps 1 and 4, the calcination device adopts an aluminum crucible.

4. The preparation method of the carbon dioxide adsorption material facilitating dissociation and regeneration according to claim 1, characterized in that, In Step 1, during calcination, heat it from room temperature to 550 °C at a rate of 10 °C / min and continuously calcine it for 2 h in an air atmosphere.

5. The preparation method of the carbon dioxide adsorption material facilitating dissociation and regeneration according to claim 1, wherein, In Step 2, use an ultrasonic cleaner to disperse it, and the ultrasonic treatment time is 1 h.

6. The preparation method of the carbon dioxide adsorption material facilitating dissociation and regeneration according to claim 1, characterized in that, In Step 3, during mixing, use a magnetic stirrer to continuously stir and mix at 50 °C and 100 r / min for 3 h; During drying, evaporate at 80 °C for 24 h.

7. The preparation method of the carbon dioxide adsorption material facilitating dissociation and regeneration according to claim 1, characterized in that, In Step 4, during calcination, heat it from room temperature to 550 °C at a rate of 10 °C / min and continuously calcine it for 2 h under argon atmosphere protection.

8. A carbon dioxide adsorption material facilitating dissociation and regeneration, characterized in that, It is prepared by the preparation method described in any one of Claims 1 to Claim 7.

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