A high-regeneration absorbent for capturing carbon dioxide, its preparation method and application

Abstract

This invention discloses a highly regenerable absorbent for capturing carbon dioxide, its preparation method, and its application, relating to the field of gas separation and purification technology. The absorbent comprises a main absorbent component, a co-absorbent component, an active component, an antioxidant, an auxiliary agent, and water. The absorbent provided by this invention, by introducing the antioxidant 2,6-di-tert-butyl-4-methoxyphenol with a specific structure and the auxiliary agent 1-isopropyl-3-pyrrolidone, synergistically combines with the main absorbent component, the co-absorbent component, the active component, and the solvent water. It exhibits excellent absorption and desorption rates and low-temperature capture performance during CO2 capture, significantly reducing capture energy consumption and improving capture efficiency, thereby reducing operating costs. It is suitable for the capture and treatment of CO2-containing waste gas.

Description

Technical Field

[0001] This invention relates to the field of gas separation and purification technology, and more specifically, to an absorbent with high regeneration performance for capturing carbon dioxide, its preparation method, and its application. Background Technology

[0002] With the continuous rise in global greenhouse gas emissions, the massive emission of carbon dioxide (CO2) has been widely recognized as one of the main causes of climate change and the greenhouse effect. Against this backdrop, carbon capture, utilization, and storage (CCUS) technology has become a key technological pathway for achieving emission reduction targets in various countries. Among these technologies, chemical absorption has become the mainstream technology for industrial-scale CO2 capture due to its high maturity and excellent capture efficiency. Traditional chemical absorption methods mainly use amine solutions, typically monoethanolamine (MEA) aqueous solutions. These absorbents react reversibly with CO2 to generate carbamates and bicarbonates, thereby achieving efficient removal of CO2 from the gas. Although MEA and other alkanolamine aqueous solution absorbents have a certain industrial foundation, they still have several significant problems in practical applications: Traditional alkanolamine absorbents are usually aqueous solutions of about 30 wt%, and their CO2 absorption is an exothermic reaction. The desorption process requires a large amount of heat energy, especially since the latent heat of vaporization of water accounts for a large proportion of the overall regeneration energy consumption. This results in the energy consumption per ton of CO2 captured generally being between 3.0 and 4.0 GJ / tCO2, which is not conducive to optimizing the energy efficiency of the capture system. At the same time, alkanolamines are prone to thermal degradation and oxidative degradation under high-temperature desorption conditions, generating byproducts such as organic acids, aldehydes, and imines. This not only affects the long-term stable use of the absorbent but may also lead to equipment corrosion and system performance deterioration.

[0003] To address the aforementioned issues, various novel CO2 absorbent systems have been proposed both domestically and internationally in recent years, including solid amines, ionic liquids, eutectic solvents, and organic amine / non-aqueous solvent mixtures. Among these, the low-aqueous alcohol amine system has become a hot research topic in recent years due to its combination of the fluidity and ease of operation of liquid absorbents, while also reducing regeneration energy consumption, increasing CO2 loading, and improving solvent stability by reducing water content.

[0004] Chinese patent application CN117427463A discloses a low-aqueous liquid-liquid two-phase absorbent and its application in carbon dioxide capture, belonging to the field of two-phase absorbent technology. This two-phase absorbent is composed of n-pentanol, hydroxyethyl ethylenediamine (AEEA), ethanolamine (MEA), dimethyl sulfoxide (DMSO), and water. While liquid-liquid phase change absorbents have the potential to reduce some regeneration energy consumption, their phase separation process is complex, and the ratio and composition of the two phases drift, increasing the difficulty of industrial scale-up.

[0005] Chinese patent application CN119215614A discloses an amine-based low-water absorbent for capturing carbon dioxide and its application. The amine-based low-water absorbent, by mass percentage, comprises 20%–50% absorbent main component, 35%–70% auxiliary solvent, and 2%–20% water. The solvent effect factor δ of the amine-based low-water absorbent ranges from 0.28 to 0.32. However, its regeneration efficiency is only 80–86%, which significantly affects the capture efficiency during the cycle and increases operating costs.

[0006] Therefore, based on the above-mentioned defects, it is particularly important to select a suitable absorbent component. Studies have found that piperazine (PZ) has advantages such as high boiling point, low solvent loss, and low equipment corrosion, but its application in water-poor systems has the disadvantages of low capture capacity and high energy consumption.

[0007] Chinese patent application CN109758871A discloses a novel method for preparing a ternary compound organic amine agent for CO2 absorption with low water content. The method and ratio are as follows: DETA (diethylenetriamine), TETA (triethylenetetramine) or TEPA (tetraethylenepentamine) are mixed with MDEA (N-methyldiethanolamine) or PZ (piperazine) in a molar ratio of 20:1-20:6 in a solution with a total amine concentration of 0.8 mol / L. The preparation conditions are a temperature of 293 K and a pressure of 101.325 kPa. The mixing conditions are uniform mixing of each of the two prepared solutions at room temperature and pressure. However, this method suffers from high viscosity, limited mass transfer efficiency leading to regeneration difficulties, and increased tendency for corrosion and degradation.

[0008] Therefore, providing an absorbent with high regeneration performance under low water content conditions has become a problem that needs to be solved. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide an absorbent with high regeneration performance for capturing carbon dioxide, its preparation method, and its application. By introducing the antioxidant 2,6-di-tert-butyl-4-methoxyphenol with a specific structure and the auxiliary agent 1-isopropyl-3-pyrrolidone, and combining them synergistically with the main absorbent component, the auxiliary absorbent component, the activating component, and the solvent water, it exhibits excellent carbon dioxide absorption capacity and rapid absorption and desorption kinetics, demonstrating excellent absorption and desorption rates and low-temperature capture performance. It achieves optimization of absorption / desorption rates, significantly reduces capture energy consumption, improves capture efficiency, and significantly reduces the high operating costs caused by alkanolamine solution loss and equipment corrosion. It is suitable for the efficient capture of carbon dioxide in industrial exhaust gas.

[0010] To achieve the above objectives, the technical solution of the present invention is as follows:

[0011] A highly regenerable absorbent for capturing carbon dioxide comprises the following components in weight percentages: 10%–40% main absorbent component, 40%–75% co-absorption component, 1%–12% active component, 0.5%–3% antioxidant, 1%–5% auxiliary agent, and 10%–40% water; wherein the antioxidant is 2,6-di-tert-butyl-4-methoxyphenol; the auxiliary agent is 1-isopropyl-3-pyrrolidone; the main absorbent component is at least one selected from N-ethylpiperazine, 1-methylpiperazine, and N-hydroxyethylpiperazine; the co-absorption component is at least one selected from 1-dimethylamino-2-propanol, diethylaminoethanol, and N,N-dimethylethanolamine; and the active component is at least one selected from piperazine, diethylenetriamine, triethylenetetramine, 3-methylaminopropylamine, N-methyldiethanolamine, and N-hydroxyethylpiperazine.

[0012] The present invention also discloses a method for preparing a highly regenerable absorbent for capturing carbon dioxide as described above, comprising the following steps: adding a main absorbent component, a co-absorbent component, an active component, an antioxidant, and an auxiliary agent to a solvent water for mixing to obtain the absorbent.

[0013] The present invention also discloses the application of the absorbent with high regeneration performance for capturing carbon dioxide as described above in capturing carbon dioxide in industrial exhaust gas.

[0014] Implementing the embodiments of the present invention will have the following beneficial effects:

[0015] The absorbent provided by this invention significantly improves carbon dioxide capture performance by introducing the antioxidant 2,6-di-tert-butyl-4-methoxyphenol with a specific structure and the auxiliary agent 1-isopropyl-3-pyrrolidone, in synergistic combination with the main absorbent component, the auxiliary absorbent component, the activating component, and the solvent water. Specifically, in this system, the antioxidant 2,6-di-tert-butyl-4-methoxyphenol, based on its molecular structure, uses the phenolic hydroxyl group as a free radical scavenging group, the ortho-tert-butyl group to provide steric hindrance, and the methoxy group to exert an electron-donating effect, exhibiting highly efficient antioxidant properties and ensuring the stability of the system. Meanwhile, the molecule of the auxiliary agent 1-isopropyl-3-pyrrolanol contains both a secondary amine group and an alcohol hydroxyl group, the introduction of which helps to reduce regeneration energy consumption; the alcohol hydroxyl group can also enhance compatibility; the main absorbent component not only has high reactivity but also a fast absorption rate; the auxiliary absorbent component can accelerate the absorption and desorption process of the amine solution, improve the overall cycle stability and efficiency of the amine solution, and extend its service life; the active component can further optimize the collection performance; the addition of solvent water is more in line with actual industrial production conditions; in addition, this invention combines the antioxidant (2,6-di-tert-butyl-4-methoxyphenol), the auxiliary agent (1-isopropyl-3-pyrrolanol), and the main absorbent component in a specific ratio, ultimately achieving optimization of the absorption / desorption rate while ensuring high absorption / desorption capacity, significantly reducing collection energy consumption, and improving collection efficiency.

[0016] The absorbent of this invention is absorbed at an absorption temperature of 40°C and an absorption pressure of atmospheric pressure for 60 minutes. It is then desorbed and regenerated at a desorption temperature of 110°C and an absorption pressure of atmospheric pressure for 60 minutes. The absorption rate is 0.076~0.086 L / min, the absorption capacity is 4.54~5.15 L (CO2) / 100g absorbent, the desorption rate is 0.065~0.079 L / min, and the desorption rate is 82.52~99.58%. This ensures stable and efficient operation of the amine solution, reducing amine loss, energy consumption loss, and economic costs and performance degradation caused by equipment corrosion. Attached Figure Description

[0017] Figure 1 This is a diagram of an absorption and desorption apparatus.

[0018] In the diagram: 1: Mass flow meter; 2: Buffer bottle; 3: Three-necked flask; 4: Rotor; 5: Oil bath; 6: Thermometer; 7: Condenser; 8: Drying bottle; 9: Wet corrosion-resistant flow meter; 10: Gas chromatograph; 11: Computer. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments, but this does not limit the present invention in any way.

[0020] This invention discloses an absorbent with high regeneration performance for capturing carbon dioxide, comprising the following components by mass percentage: 10%~40% main absorbent component, 40%~75% co-absorption component, 1%~12% active component, 0.5%~3% antioxidant, 1%~5% auxiliary agent, and 10%~40% water; the antioxidant is 2,6-di-tert-butyl-4-methoxyphenol (CAS No.: 489-01-0); the auxiliary agent is 1-isopropyl-3-pyrrolidone (CAS No.: 42729-56-6); the main absorbent component is at least one of N-ethylpiperazine, 1-methylpiperazine, and N-hydroxyethylpiperazine; the co-absorption component is at least one of 1-dimethylamino-2-propanol, diethylaminoethanol, and N,N-dimethylethanolamine; and the active component is at least one of piperazine, diethylenetriamine, triethylenetetramine, 3-methylaminopropylamine, N-methyldiethanolamine, and N-hydroxyethylpiperazine.

[0021] In one specific embodiment, the mass ratio of the main absorbent component, antioxidant and adjuvant is (15~30):1:(1~1.5).

[0022] In one specific embodiment, the mass ratio of the main absorbent component, antioxidant, and auxiliary agent is 20:1:1.

[0023] In one specific embodiment, the mass ratio of the main absorbent component to the auxiliary absorbent component is 1:(1.5~5).

[0024] In one specific embodiment, the mass ratio of the main absorbent component to the active component is (5~30):1.

[0025] The present invention also discloses a method for preparing a highly regenerable absorbent for capturing carbon dioxide as described above, comprising the following steps: adding the main absorbent component, the auxiliary absorbent component, the active component, the antioxidant and the auxiliary agent to a solvent water and mixing them to obtain the absorbent.

[0026] In one specific embodiment, the mixing temperature is 25~40°C; the mixing time is 10~30 min.

[0027] The present invention also discloses the application of the absorbent with high regeneration performance for capturing carbon dioxide as described above in capturing carbon dioxide in industrial exhaust gas.

[0028] In one specific embodiment, industrial exhaust gas includes at least one of flue gas, steel plant exhaust gas, metallurgical plant exhaust gas, chemical plant exhaust gas, coal / oil / gas power generation boiler exhaust gas, and cement kiln exhaust gas.

[0029] In one specific embodiment, the volume fraction of CO2 in the industrial exhaust gas is 5% to 50%.

[0030] In one specific embodiment, the application conditions are as follows: under the conditions of absorption temperature of 40°C and absorption pressure of atmospheric pressure, the absorption time is 60 min, followed by desorption and regeneration under the conditions of desorption temperature of 110°C and desorption pressure of atmospheric pressure, the desorption time is 60 min, the absorption rate is 0.076~0.086 L / min, the absorption amount is 4.54~5.15 L (CO2) / 100g absorbent, the desorption rate is 0.065~0.079 L / min, and the desorption rate is 82.52~99.58%.

[0031] The following are specific embodiments.

[0032] Example 1

[0033] The high-regenerative absorbent for capturing carbon dioxide in this embodiment comprises the following components by mass percentage: 30% N-ethylpiperazine, 51% N,N-dimethylethanolamine, 3% triethylenetetramine, 1.5% antioxidant 2,6-di-tert-butyl-4-methoxyphenol, 1.5% auxiliary agent 1-isopropyl-3-pyrrolidone, and 13% water.

[0034] The method for preparing the highly regenerable absorbent for capturing carbon dioxide in this embodiment includes the following steps: adding the main absorbent component, the auxiliary absorbent component, the active component, the antioxidant and the auxiliary agent to the solvent water and mixing at 25°C for 20 minutes to obtain the absorbent.

[0035] Example 2

[0036] The high-regeneration absorbent for capturing carbon dioxide in this embodiment comprises the following components by mass percentage: 40% N-ethylpiperazine, 40% N,N-dimethylethanolamine, 4% triethylenetetramine, 2% antioxidant 2,6-di-tert-butyl-4-methoxyphenol, 2% auxiliary agent 1-isopropyl-3-pyrrolidone, and 12% water.

[0037] The preparation method of the absorbent with high regeneration performance for capturing carbon dioxide in this embodiment is the same as in Example 1.

[0038] Example 3

[0039] The high-regenerative absorbent for capturing carbon dioxide in this embodiment comprises the following components by mass percentage: 28% N-ethylpiperazine, 47.6% N,N-dimethylethanolamine, 7% triethylenetetramine, 1.4% antioxidant 2,6-di-tert-butyl-4-methoxyphenol, 1.4% auxiliary agent 1-isopropyl-3-pyrrolidone, and 14.6% water.

[0040] The preparation method of the absorbent with high regeneration performance for capturing carbon dioxide in this embodiment is the same as in Example 1.

[0041] Example 4

[0042] The high-regeneration absorbent for capturing carbon dioxide in this embodiment comprises the following components by mass percentage: 30% N-ethylpiperazine, 51% N,N-dimethylethanolamine, 3% triethylenetetramine, 1% antioxidant 2,6-di-tert-butyl-4-methoxyphenol, 1% auxiliary agent 1-isopropyl-3-pyrrolidone, and 14% water.

[0043] The preparation method of the absorbent with high regeneration performance for capturing carbon dioxide in this embodiment is the same as in Example 1.

[0044] Example 5

[0045] The high-regenerative absorbent for capturing carbon dioxide in this embodiment comprises the following components by mass percentage: 30% N-ethylpiperazine, 51% N,N-dimethylethanolamine, 3% triethylenetetramine, 1.5% antioxidant 2,6-di-tert-butyl-4-methoxyphenol, 2.25% auxiliary agent 1-isopropyl-3-pyrrolidone, and 12.25% water.

[0046] The preparation method of the absorbent with high regeneration performance for capturing carbon dioxide in this embodiment is the same as in Example 1.

[0047] Example 6

[0048] The only difference between this embodiment and Example 1 is that the main absorbent component is N-hydroxyethylpiperazine, the co-absorption component is 1-dimethylamino-2-propanol, and the active component is diethylenetriamine.

[0049] Example 7

[0050] The only difference between this embodiment and Example 1 is that the main absorbent component is 1-methylpiperazine, the auxiliary absorbent component is diethylaminoethanol, and the active component is N-hydroxyethylpiperazine.

[0051] Example 8

[0052] The only difference between this embodiment and Example 1 is that the mass ratio of the main absorbent component, antioxidant, and auxiliary agent is 40:1:1.

[0053] The absorbent solution of this embodiment comprises the following components by mass percentage: 30% N-ethylpiperazine, 51% N,N-dimethylethanolamine, 3% triethylenetetramine, 0.75% antioxidant 2,6-di-tert-butyl-4-methoxyphenol, 0.75% auxiliary agent 1-isopropyl-3-pyrrolidone, and 14.5% water.

[0054] Example 9

[0055] The only difference between this embodiment and Example 1 is that the mass ratio of the main absorbent component, antioxidant, and auxiliary agent is 20:1:2.

[0056] The absorbent in this embodiment comprises the following components by mass percentage: 30% N-ethylpiperazine, 51% N,N-dimethylethanolamine, 3% triethylenetetramine, 1.5% antioxidant 2,6-di-tert-butyl-4-methoxyphenol, 3% adjuvant 1-isopropyl-3-pyrrolidone, and 11.5% water.

[0057] Comparative Example 1

[0058] This comparative example uses an industrially mature MEA amine solution with a mass fraction of 30%, the remainder being water.

[0059] Comparative Example 2

[0060] The only difference between this comparative example and Example 1 is that the antioxidant 2,6-di-tert-butyl-4-methoxyphenol is not added. The absorbent solution of this comparative example comprises the following components by mass percentage: 30% N-ethylpiperazine, 51% N,N-dimethylethanolamine, 3% triethylenetetramine, 3% auxiliary 1-isopropyl-3-pyrrolidone, and 13% water.

[0061] Comparative Example 3

[0062] The only difference between this comparative example and Example 1 is that the additive 1-isopropyl-3-pyrrolidone is not added.

[0063] The absorbent solution of this comparative example comprises the following components by mass percentage: 30% N-ethylpiperazine, 51% N,N-dimethylethanolamine, 3% triethylenetetramine, 3% antioxidant 2,6-di-tert-butyl-4-methoxyphenol, and 13% water.

[0064] Comparative Example 4

[0065] The only difference between this comparative example and Example 1 is that the antioxidant 2,6-di-tert-butyl-4-methoxyphenol and the auxiliary agent 1-isopropyl-3-pyrrolidone are not added.

[0066] The absorbent in this comparative example comprises the following components by mass percentage: 30% N-ethylpiperazine, 51% N,N-dimethylethanolamine, 3% triethylenetetramine, and 16% water.

[0067] Comparative Example 5

[0068] The only difference between this comparative example and Example 1 is that the antioxidant is 2,6-di-tert-butyl-p-cresol.

[0069] Application examples

[0070] The total amine content of the examples and comparative examples was 100g each, and each was placed into a 250mL reactor equipped with a constant temperature oil bath stirrer (experimental setup see...). Figure 1 At 40℃, CO2 with a concentration of 99.995% and a pressure of 0.2MPa was introduced at a flow rate of 300mL / min. The flow was continuously measured for 60 minutes using a wet scrubber to determine the amount and rate of carbon dioxide absorption. After the solution reached saturation, the oil bath temperature was set to 110℃ for desorption for 60 minutes, and the desorption amount and rate were measured.

[0071] The formula for calculating the absorption rate is as follows: (1)

[0072] The formula for calculating the desorption rate is as follows: (2)

[0073] Among them, V a Absorption rate (L / min), V d Desorption rate (L / min), V0: inlet gas flow rate (L / min), t: measurement time (min), V t : The cumulative volume (L) of CO2 at the outlet of the wet gas flow meter at t min.

[0074] Table 1

[0075]

[0076] Results analysis:

[0077] As shown in Table 1, different formulations have a significant impact on the carbon dioxide capture-regeneration behavior of the absorbent. All examples showed high desorption rates within 60 minutes, which were higher than those of the comparative examples. This indicates that the present application, through the synergy of the main absorbent component, the co-absorbent component and the active component, and the reasonable introduction of antioxidants and additives, can significantly improve the regeneration release capacity while ensuring the absorption capacity, thereby obtaining better recycling performance.

[0078] According to Examples 1, 2, and 3, the content of the main absorbent component has a promoting effect on the absorption capacity: when the main absorbent component is increased to 40% (Example 2), the absorption capacity reaches 5.15 L in 60 minutes; when the main absorbent component is reduced to 28% (Example 3), the absorption capacity drops to 4.55 L, indicating that the main absorbent component is an important factor determining the short-term absorption capacity. However, the overall performance is not solely determined by the absorption amount. By controlling the mass ratio of the main absorbent component to the co-absorbent component in Example 2 to 1:1, it was found that the desorption amount (4.25 L) and desorption rate (0.071 L / min) in 60 minutes were both lower than those in Example 1. By controlling the mass ratio of the main absorbent component to the active component in Example 3 to 4:1, it was found that the desorption amount (4.15 L) and desorption rate (0.069 L / min) in 60 minutes were both lower than those in Example 1. In comparison, Example 1, with its combination of main absorbent (30%), co-absorption component (51%), active component (3%), and antioxidant and adjuvant (1.5% each), achieved a desorption capacity of 4.76 L and a desorption rate of approximately 0.079 L / min in 60 min, demonstrating superior overall performance compared to Examples 2-3.

[0079] According to Examples 1, 4-5, and 8-9, there is a preferred range for the amounts of antioxidants, adjuvants, and the main absorbent component. As shown in Example 1, the desorption performance was optimal (desorption amount 4.76 L) when the mass ratio of antioxidants, adjuvants, and the main absorbent component was within the preferred range. However, when this ratio deviated (Example 4 reduced the amounts of antioxidants and adjuvants, Example 5 increased the amount of adjuvants, Example 8 reduced the amounts of antioxidants and adjuvants, and Example 9 increased the amount of adjuvants), the desorption rate decreased significantly. This indicates that simply increasing the amount of adjuvant / antioxidant does not improve performance; there is a clearly optimal range for the amounts of antioxidants and adjuvants, and deviations from this range have a significant impact on achieving low-energy regeneration.

[0080] According to Examples 1, 6 and 7, although the main / auxiliary absorption components and the types of active components were changed, the formulation structure remained similar to that of Example 1. The absorption capacity reached 4.76L and 4.74L, respectively, and the desorption capacity reached 4.70L and 4.68L, respectively. The desorption rate was 0.078L / min, which is close to that of Example 1.

[0081] In the comparative systems, although Comparative Example 1 (30% MEA aqueous solution) had a high absorption capacity of 6.78 L at 60 min, its desorption capacity was only 2.65 L and its desorption rate was about 0.044 L / min. Comparative Examples 2-5 lacked antioxidants or auxiliaries or were replaced with conventional components, and their desorption capacity was only 3.3–3.85 L, which was still significantly lower than that of the example system.

[0082] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A high-regenerability absorption liquid for capturing carbon dioxide, characterized by, It consists of the following components by mass percentage: 30% main absorbent component, 51% co-absorption component, 3% active component, 1.5% antioxidant, 1.5% adjuvant and 13% water; The antioxidant is 2,6-di-tert-butyl-4-methoxyphenol; The auxiliary agent is 1-isopropyl-3-pyrrolidone; The main absorbent component is N-ethylpiperazine; The absorption aid component is N,N-dimethylethanolamine; The active component is triethylenetetramine; 100g of total amine absorbent was placed into a 250mL reactor equipped with a constant-temperature oil bath stirrer. CO2 with a pressure of 0.2MPa and a concentration of 99.995% was introduced at a flow rate of 300mL / min under 40℃ conditions. The flow rate was continuously measured for 60min using a wet-type corrosion-resistant flow meter. The absorption capacity and rate of carbon dioxide were calculated. At 60min, the carbon dioxide absorption capacity was 4.78L, and the average absorption rate was 0.080L / min. After the solution reached saturation, the oil bath temperature was set to 110℃ for desorption for 60min, and the desorption capacity and rate were measured. At 60min, the carbon dioxide desorption capacity was 4.76L, the desorption rate was 99.58%, and the average desorption rate was 0.079L / min.

2. A high-regenerability absorption liquid for capturing carbon dioxide, characterized by, It consists of the following components by mass percentage: 30% main absorbent component, 51% co-absorption component, 3% active component, 1.5% antioxidant, 1.5% adjuvant and 13% water; The antioxidant is 2,6-di-tert-butyl-4-methoxyphenol; The auxiliary agent is 1-isopropyl-3-pyrrolidone; The main absorbent component is N-hydroxyethylpiperazine; The absorption aid component is 1-dimethylamino-2-propanol; The active component is diethylenetriamine; 100g of total amine absorbent was placed in a 250mL reactor equipped with a constant-temperature oil bath stirrer. CO2 with a pressure of 0.2MPa and a concentration of 99.995% was introduced at a flow rate of 300mL / min under 40℃ conditions. The flow rate was continuously measured for 60min using a wet-type corrosion-resistant flow meter. The absorption capacity and rate of carbon dioxide were calculated. At 60min, the carbon dioxide absorption capacity was 4.76L, and the average absorption rate was 0.079L / min. After the solution reached saturation, the oil bath temperature was set to 110℃ for desorption for 60min, and the desorption capacity and rate were measured. At 60min, the carbon dioxide desorption capacity was 4.70L, the desorption rate was 98.74%, and the average desorption rate was 0.078L / min.

3. A high-regenerability absorption liquid for capturing carbon dioxide, characterized by, It consists of the following components by mass percentage: 30% main absorbent component, 51% co-absorption component, 3% active component, 1.5% antioxidant, 1.5% adjuvant and 13% water; The antioxidant is 2,6-di-tert-butyl-4-methoxyphenol; The auxiliary agent is 1-isopropyl-3-pyrrolidone; The main absorber component is 1-methylpiperazine; The absorption aid component is diethylaminoethanol; The active ingredient is N-hydroxyethylpiperazine; 100g of total amine absorbent was placed in a 250mL reactor equipped with a constant-temperature oil bath stirrer. CO2 with a pressure of 0.2MPa and a concentration of 99.995% was introduced at a flow rate of 300mL / min under 40℃ conditions. The flow rate was continuously measured for 60min using a wet-type corrosion-resistant flow meter. The absorption capacity and rate of carbon dioxide were calculated. At 60min, the carbon dioxide absorption capacity was 4.74L, and the average absorption rate was 0.079L / min. After the solution reached saturation, the oil bath temperature was set to 110℃ for desorption for 60min, and the desorption capacity and rate were measured. At 60min, the carbon dioxide desorption capacity was 4.68L, the desorption rate was 98.73%, and the average desorption rate was 0.078L / min.

4. A method for producing a high-regeneration-performance absorption solution for capturing carbon dioxide according to any one of claims 1 to 3, characterized by, The process includes the following steps: adding the main absorbent component, the co-absorbent component, the active component, the antioxidant, and the auxiliary agent to a solvent water and mixing them to obtain the absorbent solution.

5. The method for producing an absorption solution with high regeneration performance for capturing carbon dioxide according to claim 4, characterized by, The mixing temperature is 25°C; the mixing time is 20 min.

6. The application of a highly regenerable absorbent for capturing carbon dioxide as described in any one of claims 1-3 in capturing carbon dioxide from industrial exhaust gases.

7. The application according to claim 6, characterized in that, The industrial exhaust gas includes at least one of the following: flue gas, steel plant exhaust gas, metallurgical plant exhaust gas, chemical plant exhaust gas, power plant boiler exhaust gas, and cement kiln exhaust gas; the volume fraction of CO2 in the industrial exhaust gas is 5% to 50%.

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