Post-combustion carbon dioxide trapping system based on solid adsorption method and reaction strengthening method

Abstract

The invention relates to a post-combustion carbon dioxide trapping system based on a solid adsorption method and a reaction strengthening method. The system adopts a helical surface to intensify and form an adsorbent. The after-combustion carbon dioxide capture reaction strengthening method based on the solid adsorption method is used for CO2 capture of a fixed bed system, and comprises the following steps: introducing a mixed gas containing CO2 into a fixed bed reactor loaded with the helical surface reinforced forming adsorption, and completing CO2 adsorption at 600-750 DEG C, normal pressure and air speed of 6000-20000 h <-1 >; the invention provides a solution with high stability and excellent adsorption performance for adsorption and separation of CO2 in high-temperature industrial flue gas.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of environmental pollution prevention and clean coal combustion technology, and more particularly relates to a post-combustion carbon dioxide capture reaction system based on a solid adsorbent and a reaction intensification method, which enhances the heat and mass transfer in the reaction process to improve the carbon dioxide capture efficiency in the reaction system. BACKGROUND

[0002] Under the situation that global warming has become a fact, the reduction of greenhouse gases dominated by CO2 has become the consensus of the international community in response to climate change. CO2 capture, utilization and storage (CO2 Capture Utilization and Storage, CCS) technology is considered to be one of the most promising emission reduction technologies. This technology is to capture CO2 from large fixed carbon emission sources such as coal-fired power plants and cement plants, and then compress and transport the high-concentration CO2 to a chemical plant for utilization or geological storage, so as to control the emission of CO2.

[0003] The CO2 capture technology based on solid adsorbent material is considered to be one of the most promising CO2 capture technologies because of its high CO2 adsorption capacity, compact equipment structure, small land occupation, wide scene adaptation, and high technology maturity. In recent years, the cyclic carbon dioxide capture technology based on calcium oxide adsorbent has attracted widespread attention from the academic and industrial communities. The principle of this technology is that flue gas containing 15-40% CO2 is introduced into a carbonation reactor, calcium oxide-based absorbent absorbs CO2, and then the generated carbonation product is transported to another calcination reactor with higher temperature, calcium oxide absorbent is regenerated, and high-concentration CO2 is obtained for compression, transportation and final geological storage; and the regenerated calcium oxide absorbent is transported back to the carbonation reactor for flue gas CO2 capture. This technology has multiple advantages: 1. The precursor of the adsorbent is abundant in nature and low in price; 2. It has excellent chemical reaction kinetics; 3. It has relatively high CO2 adsorption capacity in theory and can be recycled; 4. It does not need to modify the existing boiler unit; 5. The technology has low cost and good commercial application prospect; 6. The method is environmentally friendly and does not produce any secondary pollution. Based on the calcium cycle CO2 capture technology, the reaction formula is CaO + CO2 → CaCO3 in the carbonation reactor; CaCO3 → CaO + CO2↑ in the calcination reactor.

[0004] However, the CO2 capture capacity of natural calcium-based sorbents will rapidly decay due to sintering of the sorbents in practical cyclic use, and the reactivity of the sorbents will rapidly decrease (far below the theoretical adsorption capacity), increasing the cost of carbon capture in the production process. In order to improve the reactivity of calcium-based sorbents, scholars have made a series of explorations, such as preparing calcium-based sorbents by doping modification and other methods, but most of them are limited to laboratory small-scale tests, and it is difficult to meet the preparation requirements of sorbents for industrial application. Current reports focus more on the development of the intrinsic adsorption performance of materials, and the evaluation of their CO2 capture performance mostly relies on micro-precision instruments such as thermogravimetric analyzers, lacking key data for industrial applications in fixed bed reactors and fluidized bed reactor systems.

[0005] In the applicant's previous research "Effect of lignin, cellulose and hemicellulose on calcium looping behavior of CaO-based sorbents derived from extrusion-spherization method. Chemical Engineering Journal 334 (2018) 2520-2529", a spherical calcium-based sorbent with a diameter of 1 mm was prepared by extrusion-spherization method, and its cyclic CO2 capture performance was tested on a thermogravimetric analyzer. In the previous research of the Duan Lengbo team "Improved CO2 capture performance of CeO2-doped CaO-based pellets: effects of particle size and steam treatment", a series of calcium oxide sorbent pellets were prepared by "tabletting-crushing-sieving" method, and their cyclic CO2 capture performance was tested in a fixed bed reactor. However, the above reaction systems are all intrinsic carbon capture performance studies under large airspeed.

[0006] Sorbent shaping and granulation is a necessary prerequisite for industrial application, but traditional columnar sorbents have a single geometric structure in fixed bed reactors, which is not conducive to gas flow, resulting in low transfer efficiency and affecting the adsorption performance. Flue gas (fluid) flow has the characteristics of low Reynolds number, which means that the flow is more inclined to be laminar rather than turbulent, and the fluid mixing and energy exchange in laminar flow state are insufficient, and the heat and mass transfer efficiency is limited. In addition, the fluid density is low in the heat transfer boundary layer / mass transfer boundary layer, and high in the center area of the flow field, which will further reduce the heat and mass transfer efficiency near the wall. However, there is a lack of research on the enhancement of heat and mass transfer of granular sorbents in the reaction.

[0007] The reaction intensification technology research with the main task of heat transfer intensification and mass transfer intensification is the only way to industrial application, and is crucial for the reaction system design of the solid adsorbent CO2 capture. However, there is no relevant research report on the heat and mass transfer intensification of the carbonation reaction for the high-temperature capture system in which the flow field working medium (CO2) directly participates in the reaction, and there is a lack of experimental determination method for the material heat and mass transfer characteristics under the high-temperature in-situ adsorption state and a lack of theoretical data support for the CO2 capture reaction scale-up. With the improvement of the CO2 adsorption capacity, kinetic performance and heat flow density of the new capture material, the heat and mass transfer efficiency in the reactor will gradually become the bottleneck restricting the overall capture performance. SUMMARY

[0008] The purpose of the present application is to provide a post-combustion CO2 capture system based on the solid adsorption method and a reaction intensification method in view of the limitations of the current technology. The method uses spiral surface reinforced shaped adsorbents to construct the flow field structure of the adsorbent packing in the fixed bed, to create boundary disturbance and local turbulence, thereby improving the mass transfer and heat transfer efficiency of the CO2 capture system and intensifying the CO2 capture reaction efficiency. The present application provides a solution with high stability and excellent adsorption performance for high-temperature industrial flue gas CO2 adsorption separation.

[0009] The technical scheme of the present application is: A post-combustion CO2 capture system based on the solid adsorption method, which uses spiral surface reinforced shaped adsorbents.

[0010] The preparation method of the spiral surface reinforced shaped adsorbent comprises the following steps: 1) The metal precursor (including the precursor of the calcium-based precursor and the precursor of the inert metal stabilizer) is mixed and dissolved with citric acid in a container. The molar ratio of metal ions to citric acid is preferably 1:1-1:2, and the molar ratio of metal ions to water is preferably 20:1-40:1; 2) Then the mixed solution is fully stirred and heated. The stirring speed is preferably 200-400 RPM, the heating temperature is preferably 80-95℃, and the stirring and heating time is 3-5h; 3) The formed wet gel is then placed in a drying oven for aging and drying to form a dry gel. The drying / aging temperature is preferably 105-120℃, and the drying / aging time is preferably 8-16h; 4) The formed dry gel is then calcined / heat treated in a muffle furnace. The preferred calcination / heat treatment temperature is 800-950℃; 5) After cooling to room temperature, the material is collected to obtain a high intrinsic CO2 capture active calcium-based adsorbent powder; 6) The prepared high intrinsic carbon capture active adsorbent powder material is mixed with a binder, and then added into a hopper of a forming device; 7) The powder is sent into an extrusion forming cavity through a screw feeder, and is extruded through the holes of a forming plate, wherein the thickness of the three crescent arc forming plate is preferably 0.3-1 mm, and the arc length is preferably 8-20 mm; 8) The linear forming material extruded through the holes of the forming plate is cut by a cutter to obtain a forming solid adsorbent material with a helical surface reinforcing structure, and the length of the material after cutting is 20-50 mm, the diameter is 1-30 mm, and the adjacent pitch is 10-30 mm.

[0011] A post-combustion carbon dioxide capture reaction intensification method based on a solid adsorption method is used for CO2 capture in a fixed bed system.

[0012] Specifically, the method comprises the following steps: A mixed gas containing CO2 is introduced into a fixed bed reactor loaded with the helical surface reinforcing formed adsorbent, and CO2 adsorption is completed at 600-750 DEG C, normal pressure, and space velocity 6000-20000 h -1 In the mixed gas, the volume content of CO2 is 10-40%, and the remaining gas includes one or both of nitrogen and argon.

[0013] The substantial features of the present application are: In the prior art, due to the low Reynolds number characteristics of the flue gas (fluid) flow, the flow of the flow field is more inclined to be laminar rather than turbulent, the fluid mixing and energy exchange in the laminar flow state are insufficient, and the heat transfer and mass transfer efficiency is limited. In addition, the fluid has low density in the heat transfer boundary layer / mass transfer boundary layer and high density in the center area of the flow field, which further reduces the heat transfer and mass transfer efficiency near the wall. In view of the defects or improvement needs of the prior art, the purpose of the present application is to provide a post-combustion carbon dioxide capture reaction system and a reaction intensification method based on a solid adsorbent. By designing a three-dimensional structure of the formed adsorbent, the flow field structure of the adsorbent filler in the fixed bed is constructed, the boundary disturbance and local turbulence are generated, and the mass transfer and heat transfer efficiency of the carbon dioxide capture system is improved, and the CO2 capture reaction efficiency in the process is intensified. In view of the construction of the flow field structure of the formed adsorbent particles in the fixed bed filler, a preparation method of a new type of helical surface reinforcing formed adsorbent is disclosed, and an efficient CO2 capture method is optimized, which provides a solution with high stability and excellent adsorption performance for high-temperature industrial flue gas CO2 adsorption separation.

[0014] ​According to one aspect of the present application, the carbon dioxide capture reaction system is a gas-solid reaction system based on a fixed bed reactor loaded with solid adsorbent packing. Through experimental research and theoretical calculation research by the research team, a new method for enhancing post-combustion carbon dioxide capture reaction based on solid adsorbent is proposed, and a preparation method of a new type of spiral surface reinforced shaped adsorbent is disclosed.

[0015] The fixed bed reactor comprises an air inlet, a reaction standpipe, and an air outlet. The air inlet introduces industrial carbon-containing flue gas, the reaction standpipe is loaded with solid adsorbent packing, and the air outlet discharges zero-carbon flue gas (directly into the atmosphere).

[0016] The key core of the technology lies in the research and development of high intrinsic carbon capture active adsorbent (micro-nano scale) and the construction of the flow field structure of the shaped adsorbent particles in the fixed bed packing (mesoscale). By increasing the flow field boundary disturbance and local turbulence, the mass transfer and heat transfer efficiency of the carbon dioxide capture system is improved, and the CO2 capture reaction efficiency in the process is enhanced. For the research and development of high intrinsic carbon capture active adsorbent, scholars have made a lot of exploration, including the applicant team has also disclosed a plurality of high-performance adsorbents for CO2 capture.

[0017] The applicant found in the exploration that the applicability of the shaping method in the shaping and granulation of the powder adsorbent prepared by different methods (even if the chemical composition is calcium oxide) is greatly different, which is reflected in the great difference in the adhesion, thermoplasticity, mechanical interlocking ability, electrostatic force and van der Waals force of the powder material. For the shaped adsorbent of a specific flow channel structure (such as the new type of spiral surface reinforced shaped adsorbent proposed in the present application), the design and preparation method of the high intrinsic carbon capture active adsorbent also needs to be adjusted accordingly.

[0018] Shaping and granulation of adsorbent is a necessary prerequisite for industrial application, and extrusion shaping is the key to shaping of adsorbent powder. The shaped materials obtained include strips, columns and the like. However, traditional strip-shaped and columnar adsorbents (such as the strip-shaped adsorbent prepared by the extrusion method, Figure 1 have the problem of single geometry in the fixed bed reactor, which is not conducive to the flow of gas, resulting in low transfer efficiency and affecting the adsorption performance. On this basis, the applicant developed spherical adsorbents (extrusion-rolling method, Figure 3 ), trilobate adsorbents (extrusion method, Figure 4 ), quadrangular prism adsorbents (extrusion method, Figure 1 ), etc. for CO2 capture test in the fixed bed. A new type of spiral surface reinforced shaped adsorbent (extrusion-rolling method, Figure 5), to obtain the maximum mass transfer coefficient and heat transfer coefficient, to realize the adsorption reaction intensification, and to provide a post-combustion carbon dioxide capture system and reaction intensification method based on solid adsorbents.

[0019] The present application has the following beneficial effects: The present application discloses a post-combustion carbon dioxide capture system and reaction intensification method based on solid adsorbents. By intensifying the specific surface and mesoporous structure of the shaped adsorbent, the intrinsic reaction activity of the adsorbent is improved; by constructing the flow field structure of the shaped adsorbent particles in the fixed bed filler, the flow field disturbance and local turbulence are generated, thereby enhancing the contact between CO2 and the adsorbent, improving the mass transfer and heat transfer efficiency of the carbon dioxide capture system, and intensifying the CO2 capture reaction efficiency. In view of the construction of the flow field structure of the shaped adsorbent particles in the fixed bed filler, a preparation method of a new spiral surface reinforced shaped adsorbent is disclosed, and a new high-efficiency CO2 capture method is provided, which provides a solution with high stability and excellent adsorption performance for high-temperature industrial flue gas CO2 adsorption separation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A schematic diagram of a fixed bed carbon capture system based on strip-shaped adsorbent filler Figure 2 A schematic diagram of a fixed bed carbon capture system based on short column-shaped adsorbent filler Figure 3 A fixed bed carbon capture system based on spherical adsorbent filler Figure 4 A fixed bed carbon capture system based on three-leaf-shaped adsorbent filler Figure 5 A fixed bed carbon capture system based on spiral surface reinforced shaped adsorbent filler Figure 6 A preferred preparation method of high intrinsic activity adsorbent powder Figure 7 A spiral surface reinforced shaped adsorbent preparation method Figure 8 A schematic diagram of an extrusion granulation device Figure 9 A shaped hole plate structure diagram of an extrusion granulation device (for preparing traditional column-shaped adsorbents) Figure 10 A shaped hole plate structure diagram of an extrusion granulation device (for preparing spiral surface reinforced shaped adsorbents) Figure 11 Preparation of columnar adsorbents by extrusion granulation method Figure 12 Preparation of strip-shaped adsorbents by extrusion granulation method Figure 13 Preparation of spiral face enhanced shaped adsorbents by extrusion granulation method Figure 14 Heat transfer coefficient of spiral face enhanced shaped adsorbents obtained from example 1, 2, 3 in fixed bed carbon capture reaction system Figure 15 Mass transfer coefficient of spiral face enhanced shaped adsorbents obtained from example 1, 2, 3 in fixed bed carbon capture reaction system DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and points of the present application clearer, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0022] Example 1: A high specific surface area and mesoporous powder material with high intrinsic carbon capture activity is prepared by a sol-gel method, and the preparation method is as follows: 1) A metal precursor (including calcium nitrate and magnesium nitrate, wherein Mg accounts for 10 mol.%) is mixed and dissolved with citric acid in a container. The molar ratio of metal ions to citric acid is preferably 1:1; the molar ratio of metal ions to water is preferably 40:1; 2) The mixed solution is then heated and stirred thoroughly. The stirring speed is 400 RPM; the heating temperature is 80°C; and the stirring and heating time is 5h; 3) The wet gel formed is then placed in a drying oven for aging and drying to form a dry gel. The drying / aging temperature is 120°C; and the drying / aging time is 8h; 4) The dry gel formed is then calcined / heat treated in a muffle furnace. The preferred calcination / heat treatment temperature is 800°C; 5) After the material is cooled to room temperature, a high intrinsic carbon capture activity calcium-based adsorbent powder is obtained.

[0023] Then, the high intrinsic carbon capture activity calcium-based adsorbent powder is prepared into spherical adsorbent particles by an extrusion and rounding method, with the particle diameters being 3mm and 10mm respectively, and the particles are placed in a fixed bed reactor for CO2 capture test to measure the CO2 capture activity and the heat and mass transfer coefficients.

[0024] The calcium-based adsorbent particles synthesized in this example are tested for CO2 adsorption performance and transfer coefficient in a fixed bed reactor, and the test method is as follows: The reaction tube diameter of the fixed bed reactor was 40 mm, the adsorbent loading mass was 8 g, the adsorption process was carried out at 650 ℃, 15 vol% CO2 (the rest was nitrogen), normal pressure for 90 min, and the mixed gas flow rate of the adsorption process was set to 250, 500, 750 mL / min, so as to calculate the space velocity of 6000~20000 h -1 ; the desorption process was carried out at 750 ℃, pure N2 atmosphere, normal pressure for 60 min.

[0025] The transfer coefficient test process was that the adsorption process was carried out at 650 ℃, 15 vol% CO2 for 90 min, the mixed gas flow rate was 200 mL / min; the desorption process was carried out at 750 ℃, pure N2 atmosphere for 60 min, and the test was repeated for 3 times.

[0026]

[0027] In the formula, N CO2 (mol) is the mass transfer flux of CO2 in the reference test; V ref (mL / min) is the flow rate of N2; p ref (%) is the volume percentage of CO2 measured by the CO2 concentration analyzer in the reference test; V ads (mL / min) is the flow rate of N2; p ads (%) is the volume percentage of CO2 measured by the CO2 concentration analyzer in the adsorption test; The mass transfer coefficient is represented by k f (m / s); c CO2 (mol / m 3 ) is the concentration of CO2 in the mixed gas; c CO2,e (mol / m 3 ) is the equilibrium concentration of CO2; A (m 2 ) is the total surface area of the particles in the fixed bed; The heat transfer coefficient is represented by h f (W / m 2 ·K -1 ); C p,CO2 (kJ / m 3 ·K -1 ) is the constant pressure specific heat capacity of CO2 at 650 ℃; T1 (K) represents the inlet gas temperature of the fixed bed reactor; T2(K) represents the temperature of the gas at the outlet of the fixed bed reactor; T g (K) represents the temperature of the gas at the outlet of the fixed bed reactor.

[0028] Example 2: A high specific surface area and mesoporous powder material with high intrinsic carbon capture activity was prepared by the same sol-gel method as in Example 1, and then prepared into cylindrical adsorbent particles by an extrusion method, with particle diameters of 3 mm and 10 mm, respectively, and placed in a fixed bed reactor for CO2 capture testing to measure its CO2 capture activity and heat and mass transfer coefficients. The testing method was the same as in Example 1.

[0029] As Figure 14 shown in FIG. 15, Example 1 is an adsorbent packing method using a spherical structure arrangement, and when loading the particle adsorbent with a particle diameter of 3 mm, the measured heat transfer coefficient is 0.22 W / m 2 K -1 , while in comparison, Example 2 is an adsorbent packing method using a cylindrical structure arrangement, obtaining 0.24 W / m 2 K -1 ， When loading the particle adsorbent with a particle diameter of 10 mm, the measured heat transfer coefficient is 0.12 W / m 2 K -1 , while in comparison, Example 2 is an adsorbent packing method using a cylindrical structure arrangement, obtaining 0.08 W / m 2 K -1 。 On the other hand, it can be seen that when loading the particle adsorbent with a particle diameter of 3 mm, the measured mass transfer coefficient of Example 1 is 3*10 -5 m / s, while in comparison, Example 2 is an adsorbent packing method using a cylindrical structure arrangement, obtaining 2.2*10 -5 m / s ， When loading the particle adsorbent with a particle diameter of 10 mm, the measured mass transfer coefficient is 1.2*10 -5 m / s, while in comparison, Example 2 is an adsorbent packing method using a cylindrical structure arrangement, obtaining 1.23*10 -5 m / s 。

[0030] Example 3: A powder material with high intrinsic carbon capture activity, high specific surface area, and mesoporous porosity was prepared using the same sol-gel method as in Example 1. Subsequently, the orifice plate of the molding and extrusion equipment was changed to a crescent shape, and helical-faced reinforced adsorbent particles were prepared by extrusion and slicing. The characteristic diameters of the particles were 3 mm and 10 mm, respectively. These particles were then placed in a fixed-bed reactor for CO2 capture testing, and their CO2 capture activity and heat and mass transfer coefficients were calculated. The testing method was the same as in Example 1.

[0031] like Figure 14 As shown in Figure 15, Example 1 uses a spherical adsorbent packing method. When loading adsorbent particles with a diameter of 3 mm, the measured heat transfer coefficient is 0.22 W / m. 2 K -1 In contrast, Example 3 uses an adsorbent packing method with a spiral-reinforced structure, achieving 0.54 W / m³. 2 K -1 ， When loaded with particulate adsorbent with a particle diameter of 10 mm, the measured heat transfer coefficient was 0.12 W / m. 2 K -1 In contrast, Example 3 uses an adsorbent packing method with a spiral reinforced structure, achieving 0.49 W / m³. 2 K -1 。 On the other hand, it can be seen that in Example 1, when the adsorbent particles with a diameter of 3 mm were loaded, the measured mass transfer coefficient was 3*10. -5 In contrast, Example 3, which uses an adsorbent packing method with a helical reinforced structure, achieved 8.2*10 m / s. -5 m / s ， When loaded with particulate adsorbent with a particle diameter of 10 mm, the measured mass transfer coefficient was 1.2 × 10⁻⁶. -5 In contrast, Example 3, which uses an adsorbent packing method with a helical reinforced structure, achieved 8.6*10 m / s. -5 m / s 。

[0032] From the above examples, we can conclude that: by enhancing the specific surface area and mesoporous structure of the shaped adsorbent, the intrinsic reactivity of the adsorbent can be improved; by constructing the flow field structure of the shaped adsorbent particles in the fixed bed packing, flow field disturbance and local turbulence can be created, thereby enhancing the contact between CO2 and the adsorbent, improving the mass and heat transfer efficiency of the carbon dioxide capture system, and enhancing the CO2 capture reaction efficiency during the process.

[0033] It should be understood that although the present specification describes only one embodiment for carrying out the application, the specification is written to cover all possible embodiments for carrying out the application. The description of the embodiment is merely written for clarity and the skilled person should consider the specification as a whole and the technical solutions in each embodiment can be combined appropriately to form other embodiments which can be understood by the skilled person.

[0034] The details of the application are set forth in the accompanying description below. Although certain embodiments of the application are specifically illustrated and described herein, it will be appreciated that any arrangement calculated to achieve the same purpose can be substituted for the embodiments shown and described without departing from the spirit and scope of the application. It is therefore desired that the application be considered in all its aspects as illustrative and not restrictive.

Claims

1. A post-combustion carbon dioxide capture system based on solid adsorption, characterized in that, This system uses a spiral-face reinforced adsorbent; The preparation method of the spiral-face reinforced adsorbent includes the following steps: 1) A metal precursor (including calcium-based precursors and precursors of inert metal stabilizers) is mixed and dissolved in citric acid in a container. The preferred molar ratio of metal ions to citric acid is 1:1 to 1:2; the preferred molar ratio of metal ions to water is 20:1 to 40:

1. 2) The mixture is then thoroughly stirred and heated. The preferred stirring speed is 200-400 RPM; the preferred heating temperature is 80-95℃; and the stirring and heating time is 3-5 hours. 3) The formed wet gel is then placed in a drying oven for aging and drying to form a dry gel. The preferred drying / aging temperature is 105–120 °C; the preferred drying / aging time is 8–16 h. 4) The resulting dry gel is then calcined / heat-treated in a muffle furnace. The preferred calcination / heat treatment temperature is 800–950 °C. 5) The material was collected after being cooled to room temperature to obtain high intrinsic carbon capture active calcium-based adsorbent powder; 6) After the high intrinsic carbon capture active adsorbent powder material prepared above is mixed evenly with the binder, it is added through the hopper of the molding equipment; 7) The powder is fed into the extrusion molding cavity through the screw feeder, shaped under pressure and extruded through the holes of the forming plate, wherein the thickness of the crescent-shaped arc plate is 0.3-1mm and the arc length is 8-20mm; 8) The linear molding material extruded from the holes of the molding plate is sheared by a cutting blade to obtain a solid adsorbent material with a spiral surface reinforced structure. The length after shearing is 20-50mm, the diameter is 1-30mm, and the adjacent pitch is 10-30mm.

2. A method for enhancing the post-combustion carbon dioxide capture reaction based on solid adsorption, characterized in that, The aforementioned post-combustion carbon dioxide capture system based on solid adsorption is used for CO2 capture in a fixed-bed system.

3. The enhanced method for post-combustion carbon dioxide capture reaction based on solid adsorption as described in claim 2, characterized in that, Includes the following steps: A mixed gas containing CO2 was introduced into a fixed-bed reactor equipped with the aforementioned spiral-surface reinforced adsorption system, and the reaction was carried out at 600–750 °C, atmospheric pressure, and a space velocity of 6000–20000 h⁻¹. -1 CO2 adsorption is completed below; In the mixture, the volume content of CO2 is 10-40%, and the remaining gases include one or both of nitrogen and argon.

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