A particle-enhanced carbon dioxide absorbent and its preparation method

Abstract

This invention provides a particle-enhanced carbon dioxide absorbent and its preparation method. The particle-enhanced carbon dioxide absorbent, by mass (100%), comprises 0.05%-0.3% solid phase and 99.7%-99.95% liquid phase. The preparation of the solid phase includes the following steps: mechanically dismantling retired ternary lithium-ion batteries to obtain electrode material, i.e., black powder; calcining the black powder in a chain furnace; leaching the calcined black powder with sulfuric acid; drying the leaching residue; and ball milling the dried residue to finally obtain solid particles. The absorbent preparation method involves mixing the solid particles, chemical absorbent, and water in a certain proportion, and then dispersing them by stirring and ultrasonication to form a dispersed and stable suspension. The particle-enhanced carbon dioxide absorbent provided by this invention exhibits superior absorption and desorption kinetics for low-concentration CO2, while reducing desorption energy consumption, achieving efficient and low-energy separation of CO2 from low-concentration CO2 mixtures.

Description

Technical Field

[0001] This invention relates to the field of mixed gas separation and purification technology, specifically to a particle-enhanced carbon dioxide absorbent and its preparation method. Background Technology

[0002] Carbon dioxide capture, utilization, and storage (CCUS) technology is considered an effective method for achieving carbon dioxide emission reduction. Chemical absorption based on organic amine absorbents has been widely used in post-combustion CO2 capture. However, the high energy consumption of the absorbent regeneration process is a key and primary problem that needs to be addressed. Therefore, finding a low-energy, high-efficiency absorbent is crucial for reducing CO2 emissions and lowering carbon capture costs.

[0003] Nanoparticles significantly enhance heat and mass transfer processes. In the field of CO2 chemical absorption, nanoparticles, due to their size advantage, can promote gas-liquid mass transfer during CO2 absorption and desorption. Compared to traditional CO2 absorbents, nanofluid absorbents prepared based on nanoparticles also possess some unique properties, such as high thermal stability and low vapor pressure, thus showing potential industrial application value in carbon dioxide chemical absorption. However, the complex and costly preparation process of nanoparticles hinders the widespread adoption of nanofluid absorbents. Some particles generated in recycling processes have small particle sizes and possess the potential for gas adsorption and enhanced mass transfer. Modifying these particles and dispersing them in absorbents to form stable suspensions can also enhance CO2 absorption and desorption, achieving low desorption energy consumption while reducing absorbent costs. Summary of the Invention

[0004] Based on the above background, the purpose of this invention is to provide a particle-enhanced carbon dioxide absorbent that enhances CO2 absorption and desorption performance and can reduce the desorption energy consumption of the CO2 absorbent at low cost.

[0005] To achieve the above objectives, the present invention provides a method for preparing a particle-enhanced carbon dioxide absorbent as follows:

[0006] A particle-enhanced carbon dioxide absorbent, comprising, by weight 100%, 0.05%-0.3% of a solid phase and 99.7%-99.95% of a liquid phase, wherein the solid phase is solid particles; and, by weight 100%, the liquid phase comprises 30%-60% of a chemical absorbent and 40%-70% of water; wherein the chemical absorbent is one or a combination of two or more alkanolamines.

[0007] Preferably, the solid particles are prepared by: mechanically dismantling retired ternary lithium-ion batteries to obtain an electrode material mixture, i.e., black powder; calcining the black powder in a chain furnace at 500°C to 800°C, controlling the oxygen concentration in the calcination atmosphere to be below 0.3%; leaching the calcined black powder with sulfuric acid; drying the leaching residue; and ball milling the leaching residue to finally obtain solid particles. The solid particles are mainly composed of carbon and oxygen, and small amounts of nickel, cobalt, manganese, and sulfur.

[0008] Preferably, the ball milling process involves a frequency of 10 Hz and a duration of 5-30 minutes. More preferably, the ball milling process involves removing larger particles through a 500-mesh sieve and ball milling for 15 minutes at a vibration frequency of 10 Hz.

[0009] Preferably, the solid particles contain 17%-18% oxygen, 3%-4% nickel, 1%-2% cobalt, 7%-8% manganese and 5%-6% sulfur by weight, with the balance being carbon.

[0010] Preferably, the amount of the solid phase added is 0.05%-0.2%.

[0011] Preferably, the calcination conditions for the black powder are: calcination temperature 600℃.

[0012] Preferably, the alkanolamines include one or a combination of two or more of ethanolamine (MEA), diethanolamine (DEA), N-(2-hydroxyethyl)ethylenediamine (AEEA), and diethylaminoethanol (DEEA).

[0013] Preferably, the absorbent comprises, by weight 100%, 0.10% solid particles, 2.5 mol / L ethanolamine, 2.5 mol / L diethylaminoethanol, and the balance being water; or, 0.10% solid particles, 5 mol / L diethanolamine, and the balance being water.

[0014] A method for preparing the particle-enhanced carbon dioxide absorbent specifically comprises: mixing solid and liquid raw materials in a certain proportion, and dispersing them by stirring and ultrasonication to form a dispersed and stable suspension; wherein the stirring rate is 100-200 rpm and the stirring time is 3-4 hours; wherein the ultrasonic temperature is controlled at 30-50℃ and the ultrasonic time is 10-15 minutes.

[0015] According to a specific embodiment of the present invention, the preparation method of the above-mentioned particle-enhanced carbon dioxide absorbent includes the following steps: mixing solid particles, chemical absorbent and water in proportion, controlling the rotation speed at 100-200 rpm, stirring for 3-4 hours, and then controlling the temperature at 30-50℃ for ultrasonic dispersion for 10-15 minutes to make it into a dispersed and stable suspension.

[0016] Compared with existing absorbents, the present invention has the following advantages: The particle-enhanced carbon dioxide absorbent of the present invention utilizes the black powder leaching residue obtained from the recycling process of retired ternary lithium-ion batteries as a solid particle addition, thereby enhancing the capture performance of existing CO2 absorbents and reducing the cost and regeneration energy consumption of absorbents; it has superior absorption and desorption kinetics for low-concentration CO2, while reducing desorption energy consumption, thus achieving efficient and low-energy separation of CO2 from low-concentration CO2 mixtures. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This refers to the CO2 absorbent absorption and desorption performance evaluation device in Examples 1 and 2 of the present invention;

[0019] Figure 2 This is a graph showing the change in the absorption rate of the CO2 absorbent over time in Example 1 of the present invention;

[0020] Figure 3 This is a graph showing the change in CO2 absorbent absorption load over time in Example 1 of the present invention;

[0021] Figure 4 This is a graph showing the change in the desorption rate of the CO2 absorbent over time in Example 1 of the present invention;

[0022] Figure 5 This is a graph showing the change in CO2 absorbent desorption load over time in Example 1 of the present invention;

[0023] Figure 6 This is a graph showing the change in CO2 absorbent absorption load over time in Example 2 of the present invention;

[0024] Figure 7 This is a graph showing the change in CO2 absorbent desorption load over time in Example 2 of the present invention;

[0025] Figure 8 This is a particle size distribution diagram of the CO2 absorbent solid particles after different ball milling times in an embodiment of the present invention;

[0026] Figure 9 This is a diagram showing the specific surface area and pore volume of the CO2 absorbent solid particles after different ball milling times in the embodiments of the present invention;

[0027] Figure 10The contact angle of the solid particulate material;

[0028] Figure 11 The images show scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) spectra of the CO2 absorbent solid particles in Examples 1 and 2 of this invention.

[0029] Figure 12 This is an elemental atomic ratio diagram of the CO2 absorbent solid particles in Examples 1 and 2 of the present invention;

[0030] Figure 13 This is a diagram showing the elemental mass ratio of the CO2 absorbent solid particles in Examples 1 and 2 of the present invention. Detailed Implementation

[0031] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any modifications and / or alterations made to the present invention will fall within the protection scope of the present invention.

[0032] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the art. Unless otherwise specified, the methods in the following embodiments are conventional methods in the art. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following detailed description, many specific details are set forth to facilitate explanation and provide a full understanding of the embodiments of the present invention.

[0034] This invention provides a particle-enhanced carbon dioxide absorbent comprising 0.05%-0.3% solid phase and 99.7%-99.95% liquid phase. The solid phase consists of solid particles; the liquid phase, based on its total mass of 100%, comprises 30%-60% chemical absorbent and 40%-70% water; the chemical absorbent is one or a combination of two or more alkanolamines.

[0035] In the carbon dioxide absorbent of the present invention, the liquid phase of the carbon dioxide absorbent includes a chemical absorbent and water. The chemical absorbent is mainly one or two of the alkanolamines. The ratio of the solid phase to the liquid phase is controlled within a suitable range, which can improve the absorption and desorption performance of the absorbent.

[0036] The preparation method of the particle-enhanced carbon dioxide absorbent in this invention includes the following steps: mixing solid particles, chemical absorbent and water in proportion, controlling the rotation speed at 100-200 rpm, stirring for 3-4 hours, and then controlling the temperature at 30-50℃ for ultrasonic dispersion for 10-15 minutes to make it a dispersed and stable suspension.

[0037] The absorption performance testing method of the absorbent in the embodiments of the present invention, such as... Figure 1 As shown in (a), the steps include:

[0038] Place 25 mL of absorbent into a bubble absorption bottle and place it in a constant temperature water bath at 40°C.

[0039] The gas flow rate was controlled at 250 mL / min by a mass flow controller, and a mixture of 15% CO2 and 85% N2 was introduced into the bubbling absorption bottle to allow the absorbent to react fully.

[0040] The gas flow rate at the outlet was recorded using an electronic soap film flow meter. When the gas flow rate at the outlet remained stable for 10 minutes, the solution reached absorption saturation and the CO2 absorption load reached its maximum value.

[0041] The CO2 absorption rate of the absorbent can be calculated by the difference in flow rates between the inlet and outlet gases. Integrating this absorption rate over time yields the CO2 absorption load of the absorbent, calculated using the following formula:

[0042]

[0043] Where, r a V represents the absorption rate of the absorbent (mmol / min); in and V out The gas flow rates at the inlet and outlet are (mL / min), respectively; P and P0 are the atmospheric pressures (kPa) under actual and standard conditions, respectively; T and T0 are the temperatures (K) under actual and standard conditions, respectively; L a t represents the absorption load of the absorbent (mmol); t represents the absorption saturation time (min).

[0044] The method for testing the desorption performance of the absorbent in the embodiments of the present invention is as follows: Figure 1 As shown in (b), the process includes the following steps: the CO2 desorption reactor is a three-necked glass flask, and a heat-collecting constant temperature magnetic stirring bath is used to provide a 120°C constant temperature oil bath environment for the reaction.

[0045] Before the experiment begins, heat the three-necked glass flask to the reaction temperature. Once the temperature inside the reactor is stable, quickly transfer 50 mL of saturated absorbent into the reactor. Use the reaction solution that has just reached saturation as much as possible to avoid premature desorption of the rich solution. No additional gas is used for purging during the reaction.

[0046] A magnetic rotor is used at the bottom of the reactor to control a constant speed of about 200 rpm to stir and desorb the rich liquid, so as to make the temperature uniform.

[0047] The desorbed CO2 gas flow rate was measured and recorded using an electronic soap film flow meter; the desorption reaction ended when no gas flowed out of the outlet for 10 minutes.

[0048] The CO2 desorption rate of the absorbent is calculated by measuring the outlet gas velocity, and then the desorption rate is integrated over time to obtain the CO2 desorption load. The calculation formula is as follows:

[0049]

[0050] Where: L des V represents the desorption rate of the absorbent (mmol / min); out , P and P0 are the CO2 gas flow rates at the outlet (mL / min); P and P0 are the atmospheric pressures (kPa) under actual and standard conditions, respectively; T and T0 are the temperatures (K) under actual and standard conditions, respectively; L des t represents the amount of CO2 desorbed from the absorbent-rich solution (mmol); t represents the absorption saturation time (min).

[0051] Optimization of solid particle preparation method in the example

[0052] The preparation steps of the solid phase, i.e., solid particles, described in this invention are as follows:

[0053] Mechanical dismantling of retired ternary lithium-ion batteries yields a mixture of positive and negative electrode materials, i.e., black powder. This black powder is calcined in a chain furnace at 600℃, with the oxygen concentration controlled to be below 0.3%. The calcined black powder is then leached with sulfuric acid. After drying the leaching residue, it is ball-milled at a frequency of 10Hz for 5-30 minutes, ultimately yielding solid particles at different ball-milling times. These are solid particles 1, 2, 3, and 4, respectively.

[0054] Larger particles of battery black powder are removed by using a 500-mesh sieve, and solid particles are prepared using the above treatment method. Solid particles 1 are not treated in any way.

[0055] Solid particles 2 are particles obtained by ball milling battery black powder at a vibration frequency of 10Hz for 5 minutes;

[0056] Solid particles 3 are particles obtained by ball milling battery black powder at a vibration frequency of 10Hz for 15 minutes;

[0057] Solid particles 4 are particles obtained by ball milling battery black powder at a vibration frequency of 10Hz for 30 minutes.

[0058] like Figure 8 As shown, the particle sizes of the four solid particles are mainly distributed between 488-660 nm. Figure 9 As shown, the specific surface area and pore volume of solid particles increase with increasing ball milling time. The specific surface area of ​​solid particle 4 is twice that of solid particle 1, and the pore volume increases significantly. However, compared with solid particle 3, the increase is smaller. The effect of ball milling on particles is reduced. Therefore, the preparation conditions of solid particle 3 are optimal.

[0059] Figure 10 The contact angle of the solid particulate material was characterized. The solid particulate material exhibits good hydrophilicity, which is beneficial for uniform dispersion in the liquid phase. The scanning electron microscope (SEM) images of the solid particles are shown below. Figure 11 As shown, the atomic ratio and weight ratio of the elements are respectively as follows: Figure 12 and Figure 13 As shown. According to the SEM-EDS spectrum, the main component of the leaching residue is carbon, accounting for 78.02% of the atoms. It originates from the graphite of the lithium-ion battery negative electrode, with a small amount of impurities such as manganese sulfate adhering to the surface, representing residual positive electrode material after acid leaching. Figure 13 It can be seen that the obtained solid particles contain 17.85% oxygen, 3.29% nickel, 1.88% cobalt, 7.63% manganese and 5.2% sulfur, with the balance being carbon.

[0060] In the following embodiments, the solid particles 3 obtained were selected as leaching residue for ternary lithium-ion battery black powder for testing.

[0061] Example 1

[0062] This embodiment provides a set of particle-enhanced carbon dioxide absorbents, namely: absorbent 1, absorbent 2, absorbent 3, absorbent 4, and absorbent 5;

[0063] The absorbent is prepared using the above-described method for preparing particle-enhanced carbon dioxide absorbent, wherein...

[0064] The composition of absorbent 1 is (5 mol / L ethanolamine + balance water);

[0065] The composition of absorbent 2 is (0.05% ternary lithium-ion battery black powder leaching residue + 5 mol / L ethanolamine + balance water);

[0066] The composition of absorbent 3 is (0.1% ternary lithium-ion battery black powder leaching residue + 5 mol / L ethanolamine + balance water);

[0067] The composition of absorbent 4 is (0.2% ternary lithium-ion battery black powder leaching residue + 5 mol / L ethanolamine + balance water);

[0068] The composition of absorbent 5 is (0.3% ternary lithium-ion battery black powder leaching residue + 5 mol / L ethanolamine + balance water);

[0069] Using the above-described absorption device testing method, the absorption rate and absorption load of each absorbent were tested, and the results are as follows: Figure 2 and Figure 3 As shown. Figure 2 and Figure 3 In the figure, the horizontal axis represents time, and the vertical axis represents absorption rate and absorption load, respectively. As can be seen from the figure, compared with the blank absorbent 1, adding a certain proportion of ternary lithium-ion battery black powder leaching residue helps to improve the absorption rate and absorption load of the absorbent. The absorption rates of absorbents 2, 3, and 4 are generally faster, while absorbent 5, due to its excessively high solid particle concentration, actually leads to a decrease in absorption rate, lower than that of absorbent 1. After absorption saturation, the CO2 absorption load is shown in Table 1. The absorption loads of absorbents 2, 3, and 4 are all greater than that of the blank absorbent 1, while the absorption load of absorbent 5 is lower than that of absorbent 1. Absorbent 3 has the highest absorption load; therefore, the solid particle concentration of absorbent 3 is optimal.

[0070] Table 1 CO2 Absorption Load of Example 1

[0071] absorbent <![CDATA[CO2 absorption load (mmol)]]> Absorbent 1 66.53 Absorbent 2 68.24 Absorbent 3 69.99 Absorbent 4 68.36 Absorbent 5 61.75

[0072] Using the above-described desorption device and testing method, the desorption rate and desorption load of each absorbent were tested, and the results are as follows: Figure 4 and Figure 5 As shown. Figure 4 and Figure 5 In the figure, the horizontal axis represents time, and the vertical axis represents desorption rate and desorption load, respectively. As can be seen from the figure, compared with absorbent 1, absorbents 2, 3, and 4 have higher maximum desorption rates, while absorbent V has a slower desorption rate. After complete desorption, the amount of CO2 desorbed is shown in Table 2. The amount of CO2 desorbed by absorbents 2, 3, and 4 is greater than that of absorbent 1, while the amount of CO2 desorbed by absorbent 5 is lower than that of absorbent 1. Absorbent 3 has the largest amount of CO2 desorbed. Therefore, the optimal concentration of solid particles in absorbent 3 is 0.10%.

[0073] Table 2 CO2 desorption amount in Example 1

[0074] absorbent <![CDATA[Amount of desorbed CO2 (mmol)]]> Absorbent 1 56.94 Absorbent 2 57.90 Absorbent 3 61.27 Absorbent 4 57.45 Absorbent 5 54.93

[0075] Example 2

[0076] This embodiment provides a set of particle-enhanced carbon dioxide absorbents, namely: absorbent 6, absorbent 7, absorbent 8, absorbent 9, absorbent 10, absorbent 11, absorbent 12, and absorbent 13.

[0077] The absorbent is prepared using the above-described method for preparing particle-enhanced carbon dioxide absorbent, wherein...

[0078] The composition of absorbent 6 is (5 mol / L diethanolamine + balance water);

[0079] The composition of absorbent 7 is (0.1% ternary lithium-ion battery black powder leaching residue + 5 mol / L diethanolamine + balance water);

[0080] The composition of absorbent 8 is (5 mol / L N-(2-hydroxyethyl)ethylenediamine + balance water);

[0081] The composition of absorbent 9 is (0.10% ternary lithium-ion battery black powder leaching residue + 5 mol / L N-(2-hydroxyethyl)ethylenediamine + balance water);

[0082] The composition of absorbent 10 is (5 mol / L diethylaminoethanol + balance water);

[0083] The composition of absorbent 11 is (0.10% ternary lithium-ion battery black powder leaching residue + 5 mol / L diethylaminoethanol + balance water);

[0084] The composition of absorbent 12 is (2.5 mol / L ethanolamine + 2.5 mol / L diethylaminoethanol + balance water);

[0085] The composition of absorbent 13 is (0.10% ternary lithium-ion battery black powder leaching residue + 2.5 mol / L ethanolamine + 2.5 mol / L diethylaminoethanol + balance water);

[0086] Using the above-described absorption device testing method, the absorption rate and absorption load of each absorbent were tested, and the results are as follows: Figure 6 As shown. Figure 6 In the figure, the horizontal axis represents time, and the vertical axis represents absorption load. As can be seen from the figure, absorbents 7, 9, 11, and 13 all have faster absorption rates compared to absorbents 6, 8, 10, and 12, respectively. The CO2 absorption loads after absorption saturation are shown in Table 3. The CO2 absorption loads of absorbents 7, 9, 11, and 13 are all higher than those of the control absorbents. Therefore, the addition of 0.10% solid particles has a certain enhancing effect on the absorption performance of different organic amine absorbents or mixed amine absorbents.

[0087] Table 3 CO2 Absorption Load in Example 2

[0088] absorbent <![CDATA[CO2 absorption load (mmol)]]> Absorbent 6 62.36 Absorbent 7 64.14 Absorbent 8 108.91 Absorbent 9 115.00 Absorbent 10 71.22 Absorbent 11 74.13 Absorbent 12 30.32 Absorbent 13 32.92

[0089] Using the above-described desorption device and testing method, the desorption rate and desorption load of each absorbent were tested, and the results are as follows: Figure 7 As shown. Figure 7In the figure, the horizontal axis represents time, and the vertical axis represents desorption load. As can be seen from the figure, absorbents 7, 9, 11, and 13 all exhibit faster desorption rates compared to absorbents 6, 8, 10, and 12, respectively. The amount of CO2 desorbed by each absorbent after complete desorption is shown in Table 3. The amount of CO2 desorbed by absorbents 7, 9, 11, and 13 is greater than that of the control absorbent. Therefore, the addition of 0.10% solid particles has a certain enhancing effect on the desorption performance of different organic amine absorbents or mixed amine absorbents.

[0090] Table 4. CO2 desorption amount in Example 2

[0091]

[0092]

[0093] Based on the above experimental results, it can be seen that the formulation of absorbent 7 and absorbent 13 has the best effect, with better absorption and desorption kinetics for low concentration CO2, while reducing desorption energy consumption, thus achieving efficient and low-energy separation of CO2 from low concentration CO2 mixtures.

[0094] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0095] The present invention provides a detailed description of a particle-enhanced carbon dioxide absorbent and its preparation method. Specific examples have been used to illustrate the principles and implementation methods of the invention. These examples are merely illustrative to aid in understanding the method and core concepts of the invention. It should be noted that those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims.

Claims

1. A particulate enhanced carbon dioxide absorbent characterised in that: The composition of the absorbent comprises 0.05%-0.3% of solid phase and 99.7%-99.95% of liquid phase, based on the total mass of the absorbent being 100%; The solid phase is solid particles; the composition of the liquid phase comprises 30%-60% of chemical absorbent and 40%-70% of water, based on the total mass of the liquid phase being 100%; the chemical absorbent is one or a combination of two or more of alcohol amine substances; The preparation method of the solid particles is: mechanically disassembling a retired ternary lithium ion battery to obtain an electrode material mixture, i.e. black powder, roasting the black powder in a chain furnace at 500-800 DEG C, controlling the oxygen concentration in the roasting atmosphere to be lower than 0.3%, leaching the roasted black powder with sulfuric acid, drying the leaching residue, and ball milling the leaching residue to obtain the solid particles; The solid particles contain, by weight percentage, 17%-18% of oxygen, 3%-4% of nickel, 1%-2% of cobalt, 7%-8% of manganese, and 5%-6% of sulfur, and the balance is carbon.

2. The particulate-enhanced carbon dioxide absorbent of claim 1, wherein: The ball milling treatment is: removing particles with large particle size through a 500-mesh sieve, and ball milling for 15 minutes at a vibration frequency of 10 Hz.

3. The particulate-enhanced carbon dioxide absorbent of claim 1, wherein: The ball milling treatment is: removing particles with large particle size through a 500-mesh sieve, and ball milling for 15 minutes at a vibration frequency of 10 Hz.

4. The particulate-enhanced carbon dioxide absorbent of claim 1, wherein: The addition amount of the solid phase is 0.05%-0.2%.

5. The particulate-enhanced carbon dioxide absorbent of claim 1, wherein: The black powder roasting condition is: a roasting temperature of 600 DEG C.

6. The particulate-enhanced carbon dioxide absorbent of claim 2, wherein: The alcohol amine substances include one or a combination of two or more of ethanol amine, diethanol amine, N-(2-hydroxyethyl) ethylenediamine, and diethylamino ethanol.

7. The particulate-enhanced carbon dioxide absorbent of claim 1, wherein: The composition of the absorbent comprises 0.10% of solid particles, 2.5 mol / L of ethanol amine, 2.5 mol / L of diethylamino ethanol, and the balance is water, based on the total mass of the absorbent being 100%; or 0.10% of solid particles, 5 mol / L of diethanol amine, and the balance is water.

8. A method of producing the particulate-strengthened carbon dioxide absorbent of claim 1, characterized by: The solid phase and the liquid phase raw materials are mixed in proportion, dispersed by stirring and ultrasonic, and then made into a stable suspension; the stirring rate is 100-200 rpm, and the stirring time is 3-4 hours; the ultrasonic temperature is controlled at 30-50 DEG C, and the ultrasonic time is 10-15 minutes.

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