Carbon Capture Sorbent Performance Test System

Abstract

It is a carbon capture absorbent performance test system. The carbon capture absorbent performance test system includes a carbon capture unit (1), an external circulation unit (2), and a detection assembly (3). The carbon capture unit (1) reacts carbon dioxide with an absorbent solution. The external circulation unit (2) includes an external circulation line (23), a temperature adjustment means (22), and a driving means (21). Both the temperature adjustment means (22) and the driving means (21) are provided on the external circulation line. The temperature adjustment means (22) can adjust the temperature of the absorbent solution in the external circulation line. The driving means (21) can drive the absorbent solution to circulate between the external circulation line (23) and the carbon capture unit (1). The detection assembly (3) can detect the carbon capture rate of the carbon capture unit (1).

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority from Chinese Patent Application No. 202310132789.5, filed in China on February 17, 2023, the entire contents of which are incorporated herein by reference. [Technical Field]

[0002] The present disclosure relates to the field of carbon capture technology, and more particularly to a carbon capture sorbent performance testing system. [Background technology]

[0003] At present, industrial carbon capture technologies mainly include chemical absorption and physical adsorption. Chemical absorption mainly uses absorbent solutions to separate and collect carbon dioxide in industrial exhaust gases. The reaction principle is that the absorbent solution reacts with carbon dioxide to form a stable compound solution, which then decomposes under high temperature to return to carbon dioxide gas and absorbent solution, thereby realizing the separate collection of carbon dioxide and the recovery and reuse of the absorbent solution. Summary of the Invention [Problem to be solved by the invention]

[0004] In related art, the temperature changes in each carbon capture process, such as the heat exchange process between the rich liquid and the lean liquid, the heating process of the desorption tower, and the reflux cooling process, can cause the absorbent to volatilize or deteriorate, resulting in a certain amount of absorbent loss. Therefore, to maintain normal carbon capture, the absorbent must be replenished during the carbon capture process. However, because it is difficult to determine the specific absorbent loss rate in each carbon capture process, operators are unable to replenish the absorbent as needed, which affects the carbon capture efficiency. [Means for solving the problem]

[0005] An embodiment of the present disclosure provides a carbon capture absorbent performance testing system that simulates each process in a carbon capture industrial circulation system, using a temperature control device to simulate each process under actual operating conditions, and detecting the amount of absorbent content loss under the simulated operating conditions, thereby obtaining the amount of absorbent loss in the actual carbon capture process, providing a basis for appropriately replenishing the amount of absorbent used and maintaining stable carbon capture efficiency. The carbon capture absorbent performance testing system of the embodiment of the present disclosure can also be used to monitor factors that affect the absorbent loss rate, such as the temperature of the absorption tower, the heating temperature of the desorption tower, and the materials used to make the carbon capture device. Therefore, the test results can be used to reduce the absorbent loss rate and optimize the carbon capture process.

[0006] A carbon capture absorbent performance testing system according to an embodiment of the present disclosure includes: a carbon capture unit that absorbs carbon dioxide by reacting the carbon dioxide with an absorbent solution; an external circulation unit having an external circulation line, a temperature adjustment means, and a driving means, wherein an inlet of the external circulation line is connected to a liquid outlet of the carbon capture unit and an outlet of the external circulation line is connected to a liquid inlet of the carbon capture unit, both the temperature adjustment means and the driving means are provided in the external circulation line, the temperature adjustment means adjusts the temperature of the absorbent solution in the external circulation line, and the driving means drives the absorbent solution to circulate between the external circulation line and the carbon capture unit; and a detection assembly that detects the carbon capture rate of the carbon capture unit.

[0007] According to the carbon capture absorbent performance testing system of the embodiment of the present disclosure, the external circulation unit can use a driving means to transport the absorbent solution from the carbon capture unit to the temperature adjustment means, and then the temperature adjustment means can adjust the temperature of the absorbent solution to simulate the temperature change of the absorbent solution in an actual carbon capture process. The temperature-adjusted absorbent solution is then returned to the carbon capture unit through the external circulation line to react with carbon dioxide. Finally, the detection assembly can detect the carbon capture efficiency of the temperature-adjusted absorbent solution and the carbon capture efficiency of the non-temperature-adjusted absorbent solution, and the two data can be compared to obtain the change in the ability of the absorbent solution to absorb carbon dioxide under the simulated working conditions, as well as the absorbent loss rate. As a result, the carbon capture absorbent performance testing system according to the embodiment of the present disclosure uses simplified testing equipment to simulate each step in an actual carbon capture industrial cycle, uses a temperature control means to simulate the temperature of each step under actual working conditions, and detects the loss of absorbent content under simulated working conditions, thereby obtaining the loss of absorbent in the actual carbon capture process, providing a basis for appropriately replenishing the amount of absorbent used and maintaining stable carbon capture efficiency.

[0008] In addition, the carbon capture sorbent performance testing system according to the embodiment of the present disclosure can also be used to observe factors that affect the sorbent loss rate, such as the temperature of the absorption tower, the heating temperature of the desorption tower, the manufacturing material of the carbon capture device, etc. Therefore, the test results can be used to reduce the sorbent loss rate and optimize the carbon capture process.

[0009] In some embodiments, the detection assembly may include a first detection assembly disposed at a gas inlet of the carbon capture unit to detect the carbon dioxide content in the inlet gas, and a second detection assembly disposed at a gas outlet of the carbon capture unit to detect the carbon dioxide content in the exhaust gas.

[0010] In some embodiments, the temperature adjustment means comprises a heater and a heat exchanger, the external circulation line comprises a liquid inlet line communicating with the liquid outlet of the carbon capture unit and a liquid return line communicating with the liquid inlet of the carbon capture unit, the cold source chamber of the heat exchanger communicates with the liquid inlet line, the heat source chamber of the heat exchanger communicates with the liquid return line, and the heater may be provided in a line between the outlet of the cold source chamber and the inlet of the heat source chamber.

[0011] In some embodiments, the temperature adjustment means may further comprise a cooler provided in an outlet line of the heat source chamber for cooling the hot absorbent solution flowing out of the heat source chamber.

[0012] In some embodiments, the heater may be an electric heater or a heat pipe heater.

[0013] In some embodiments, the external circulation unit further comprises a defoamer, the driving means being provided between the liquid outlet of the carbon capture unit and the temperature adjustment means, and the defoamer being provided between the driving means and the temperature adjustment means.

[0014] In some embodiments, the external circulation unit may further include a metering pump provided between the defoaming device and the temperature adjustment means.

[0015] In some embodiments, the external circulation unit may further include a backpressure valve provided in the external circulation line.

[0016] In some embodiments, the carbon capture sorbent performance testing system may further include a temperature detection assembly that detects the temperatures of the liquid inlet and liquid outlet of the carbon capture unit and the inlet and outlet temperatures of each element of the external circulation unit.

[0017] In some embodiments, the temperature detection assembly includes a plurality of thermometers, each of which is positioned corresponding to a respective temperature measurement point, and the thermometers may be K-type stainless steel thermocouples. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram of a carbon capture sorbent performance testing system according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following detailed description of the embodiments of the present disclosure is provided with reference to the accompanying drawings, which are merely illustrative and are intended to illustrate the present disclosure and should not be construed as limiting the present disclosure.

[0020] As shown in FIG. 1, a carbon capture sorbent performance testing system according to an embodiment of the present disclosure includes a carbon capture unit 1, an external circulation unit 2, and a detection assembly 3.

[0021] Specifically, the carbon capture unit 1 absorbs carbon dioxide by reacting it with an absorbent solution. The external circulation unit 2 includes an external circulation line 23, a temperature adjustment means 22, and a driving means 21. The inlet of the external circulation line 23 is connected to the liquid outlet of the carbon capture unit 1, and the outlet of the external circulation line 23 is connected to the liquid inlet of the carbon capture unit 1. The temperature adjustment means 22 and the driving means 21 are both provided on the external circulation line 23, and the temperature adjustment means 22 adjusts the temperature of the absorbent solution in the external circulation line 23. The driving means 21 drives the absorbent solution to circulate between the external circulation line 23 and the carbon capture unit 1. The detection assembly 3 can detect the carbon capture rate of the carbon capture unit 1.

[0022] The carbon capture absorbent performance testing system according to the embodiment of the present disclosure is designed based on the temperature adjustment process that the absorbent solution undergoes in actual production. That is, in actual production, the absorbent solution first absorbs carbon dioxide in industrial exhaust gas in an absorption tower to form a carbon dioxide-rich liquid. The carbon dioxide-rich liquid then flows into a desorption tower for high-temperature desorption. The carbon dioxide-rich liquid is decomposed into carbon dioxide gas and a carbon dioxide-lean liquid (i.e., the original absorbent solution). The carbon dioxide gas is then stored in a gas storage tank, and the carbon dioxide-lean liquid is cooled and flows back into the absorption tower to participate in the next carbon capture cycle. In this process, the high-temperature carbon dioxide-rich liquid also exchanges heat with the low-temperature carbon dioxide-rich liquid to enhance the utilization of waste heat in the carbon capture process.

[0023] That is, in the carbon capture absorbent performance testing system according to the embodiment of the present disclosure, the carbon capture unit 1 can absorb carbon dioxide into the absorbent solution instead of the absorption tower, and the external circulation unit 2 can transport the absorbent solution from the carbon capture unit 1 to the temperature adjustment means 22 using the driving means 21. The temperature adjustment means 22 can then adjust the temperature of the absorbent solution to simulate temperature changes in the carbon capture process, such as heating in the desorption tower, heat exchange between the rich liquid and the lean liquid, and cooling for recovery of the lean liquid. The temperature-adjusted absorbent solution is then returned to the carbon capture unit 1 through the external circulation line 23 to react with carbon dioxide. Finally, the detection assembly 3 can detect changes in the carbon dioxide content in the carbon capture unit 1, thereby reflecting the carbon capture efficiency of the absorbent solution.

[0024] To facilitate understanding of how to use the carbon capture absorbent performance testing system according to the embodiments of the present disclosure, the following describes the process of testing a carbon capture absorbent. In some embodiments, when conducting a test, one set of absorbent solution is first prepared and carbon capture is performed directly in the carbon capture unit 1 (i.e., the external circulation unit 2 is turned off and the temperature of the absorbent solution is not adjusted), and the carbon capture efficiency of the absorbent solution in that set is recorded using the detection assembly 3. Then, another set of absorbent solution with the same concentration is prepared and the temperature of the absorbent solution in that set is adjusted using the external circulation unit 2, and carbon capture is performed in the carbon capture unit 1. Similarly, the carbon capture efficiency of the absorbent solution in that set is recorded using the detection assembly 3. Finally, the carbon capture efficiency of the two sets of absorbent solutions can be compared to obtain the absorbent loss rate under simulated operating conditions.

[0025] The loss of absorbent is reflected in a decrease in the absorbent concentration in the solution, but it is difficult to accurately measure the absorbent concentration. Therefore, in the embodiment of the present disclosure, the absorbent loss rate can be reflected in part by using the change in the carbon capture efficiency of the absorbent solution before and after temperature adjustment. That is, the higher the carbon capture efficiency of the absorbent solution, the lower the absorbent loss rate. Conversely, the lower the carbon capture efficiency of the absorbent solution, the higher the absorbent loss rate.

[0026] Furthermore, the absorbent loss rate varies when the same absorbent solution is used in a carbon capture process under different temperature adjustment modes, or when different absorbent solutions are used in a carbon capture process under the same temperature adjustment mode. In contrast, the embodiments of the present disclosure use simple testing equipment to simulate the temperature changes experienced by the absorbent solution in an actual carbon capture process, thereby not only accurately adjusting the temperature of the absorbent solution according to the actual working conditions, but also avoiding the influence of other external factors on the test results, and obtaining accurate absorbent loss rates under various working conditions. As a result, it is possible to provide a basis for appropriately replenishing the amount of absorbent used in the actual carbon capture process and maintain stable carbon capture efficiency.

[0027] Furthermore, the external circulation unit 2 adjusts the temperature by drawing out the absorbent solution from the carbon capture unit 1, which makes it easier to achieve a temperature adjustment mode that matches the actual working conditions, thereby improving test accuracy.

[0028] In some embodiments, the driving means 21 can be a peristaltic pump, which can achieve liquid transport by squeezing a hose, so that the absorbent solution passes only through the hose in the pump body, making it less likely to remain, easier to clean, and less likely to be contaminated. This ensures that the carbon capture absorbent performance testing system provided by the embodiments of the present disclosure can be used multiple times, improving testing efficiency.

[0029] The carbon capture absorbent performance testing system according to the embodiments of the present disclosure can also be used to observe factors affecting the absorbent loss rate. In some embodiments, the effect of the temperature of the absorption tower on the absorbent loss rate can be obtained by changing the initial temperature of the absorbent solution in the carbon capture unit 1 and observing the change in the carbon capture rate of the absorbent solution. In some embodiments, the effect of the heating temperature of the desorption tower on the absorbent loss rate can be obtained by changing the maximum heating temperature of the temperature control means 22 and observing the change in the carbon capture rate of the absorbent solution. In some embodiments, the effect of the absorbent solution transition material on the absorbent loss rate can be obtained by changing the manufacturing materials of each assembly of the carbon capture absorbent performance testing system and observing the change in the carbon capture rate of the absorbent solution. As a result, the test results can be used to reduce the absorbent loss rate and optimize the carbon capture process.

[0030] In a carbon capture absorbent performance testing system according to an embodiment of the present disclosure, the external circulation unit can use a driving means to transport the absorbent solution from the carbon capture unit to a temperature adjustment means, and the temperature adjustment means can then adjust the temperature of the absorbent solution to simulate the temperature change of the absorbent solution in an actual carbon capture process, and the temperature-adjusted absorbent solution can then be returned to the carbon capture unit through the external circulation line to react with carbon dioxide. Finally, the detection assembly can detect the carbon capture efficiency of the temperature-adjusted absorbent solution and the carbon capture efficiency of the non-temperature-adjusted absorbent solution, and the two data can be compared to obtain the change in the ability of the absorbent solution to absorb carbon dioxide under the simulated operating conditions and the absorbent loss rate. As a result, the carbon capture absorbent performance testing system according to the embodiment of the present disclosure uses simple testing equipment to simulate each step in an actual carbon capture industrial cycle, uses a temperature control means to simulate the temperature of each step under actual working conditions, and detects the amount of absorbent content lost under the simulated working conditions, thereby obtaining the amount of absorbent lost in the actual carbon capture process, providing a basis for appropriately replenishing the amount of absorbent used, and maintaining stable carbon capture efficiency.

[0031] In addition, the carbon capture sorbent performance testing system according to the embodiments of the present disclosure can also be used to monitor factors that affect the sorbent loss rate, such as the temperature of the absorption tower, the heating temperature of the desorption tower, the material used to make the carbon capture device, etc. As a result, the test results can be used to reduce the sorbent loss rate and optimize the carbon capture process.

[0032] 1, the detection assembly 3 includes a first detection assembly 31 and a second detection assembly 32. The first detection assembly 31 is disposed at the gas inlet of the carbon capture unit 1 and detects the carbon dioxide content in the inlet gas. The second detection assembly 32 is disposed at the gas outlet of the carbon capture unit 1 and detects the carbon dioxide content in the exhaust gas.

[0033] The carbon capture efficiency of the absorbent solution is expressed as the amount of carbon dioxide absorbed by the absorbent solution. In an embodiment of the present disclosure, after a mixed gas containing carbon dioxide is introduced into the carbon capture unit 1, the first detection assembly 31 detects the amount of carbon dioxide in the mixed gas before reaction with the absorbent solution, and the second detection assembly 32 detects the amount of carbon dioxide in the mixed gas after reaction with the absorbent solution. The amount of carbon dioxide reduction can be obtained by comparing the two sets of detection data. The amount of carbon dioxide reduction is the amount of carbon dioxide absorbed by the absorbent solution, and this determines the carbon capture efficiency of the absorbent solution.

[0034] The detection assembly 3 may use a carbon isotope labeling method, an infrared absorption method, or the like to detect changes in the carbon dioxide content, and the specific method can be appropriately selected depending on the test conditions.

[0035] In some embodiments, as shown in FIG. 1, the temperature adjustment means 22 comprises a heater 222 and a heat exchanger 221, the external circulation line 23 comprises a liquid inlet line 231 connected to the liquid outlet of the carbon capture unit 1 and a liquid return line 232 connected to the liquid inlet of the carbon capture unit, the cold source chamber of the heat exchanger 221 is connected to the liquid inlet line 231, the heat source chamber of the heat exchanger 221 is connected to the liquid return line 232, and the heater 222 is provided in the line between the outlet of the cold source chamber and the inlet of the heat source chamber.

[0036] In addition, based on the operating conditions that the temperature control means 22 needs to simulate the temperature change of the absorbent solution during heating in the desorption tower or the heat exchange process between rich liquid and lean liquid, a heater 222 and a heat exchanger 221 can be installed in the temperature control means 22, and the unheated absorbent solution flowing out from the carbon capture unit 1 flows into the cold source chamber of the heat exchanger 221, and the absorbent solution heated by the heater 222 flows into the heat source chamber of the heat exchanger 221, and the two types of solutions can exchange heat within the heat exchanger 221, thereby simulating the temperature change situation of the absorbent solution during the heat exchange process between rich liquid and lean liquid. At the same time, the heater 222 can heat the absorbent solution that flows in, thereby simulating the temperature change situation of the absorbent solution during the desorption tower heating process.

[0037] In some embodiments, as shown in FIG. 1, the temperature adjusting means 22 further comprises a cooler 223, which is provided in the outlet line of the heat source chamber to cool the hot absorbent solution flowing out of the heat source chamber.

[0038] In addition, since the high-temperature absorbent solution needs to be cooled when it is returned to the absorption tower, a cooler 223 can be installed in the temperature adjustment means 22 of the above embodiment, and the cooler 223 can lower the temperature of the absorbent solution.

[0039] In some embodiments, as shown in FIG. 1, heater 222 is an electric heater or a heat pipe heater.

[0040] Note that heater 222 is the only heat source in temperature control means 22. If the heat exchange efficiency of heat exchanger 221 is constant, the heating temperature of the absorbent solution by heater 222 directly affects whether the temperature change of the absorbent solution under the simulated operating conditions can match the actual carbon capture process. Either an electric heater or a heat pipe heater can achieve precise control of the heating temperature of the absorbent solution and ensure that the test requirements are met. In some embodiments, the heat pipe heater is an oil bath heater.

[0041] In some embodiments, as shown in FIG. 1 , the external circulation unit 2 further comprises a defoamer 5, the driving means 21 is disposed between the liquid outlet of the carbon capture unit 1 and the temperature adjustment means 22, and the defoamer 5 is disposed between the driving means 21 and the temperature adjustment means 22.

[0042] After being extracted by the driving means 21, the absorbent solution passes through the defoamer 5 and then flows into the temperature adjustment means 22. This allows the defoamer 5 to remove air bubbles mixed in the absorbent solution, thereby preventing them from affecting the test effect.

[0043] In some embodiments, as shown in FIG. 1, the external circulation unit 2 further includes a metering pump 6 provided between the defoaming device 5 and the temperature adjusting means 22 .

[0044] In addition, the metering pump 6 can adjust the flow rate of the absorbent solution input to the temperature control means 22, ensuring that the absorbent solution can be heated or cooled uniformly within the temperature control means 22, thereby improving the reliability of the test results.

[0045] In some embodiments, as shown in FIG. 1, the external circulation unit 2 further includes a backpressure valve 4 provided in the external circulation line 23 .

[0046] In addition, the back pressure valve 4 can prevent the backflow of the absorbent solution and ensure the stability of the flow rate of the absorbent solution, thereby ensuring the normal execution of the absorbent performance test.

[0047] In some embodiments, a back pressure valve 4 is provided between the cooler 223 and the carbon capture unit 1 .

[0048] In some embodiments, the carbon capture sorbent performance testing system further includes a temperature detection assembly 3 (not shown), which can detect the temperatures of the liquid inlet and liquid outlet of the carbon capture unit 1 and the inlet and outlet temperatures of each element of the external circulation unit 2.

[0049] In addition, the temperature detection assembly 3 can dynamically reflect the temperature of the absorbent solution in each circulation element, and can detect whether the absorbent solution achieves the expected temperature adjustment effect. If an error occurs, the relevant test can be stopped promptly and the test can be continued after the error is resolved, thereby ensuring the accuracy of the test results.

[0050] In some embodiments, the temperature detection assembly 3 comprises a plurality of thermometers, one for each temperature measurement point, and the thermometers are K-type stainless steel thermocouples.

[0051] In addition, the K-type stainless steel thermocouple can measure temperature quickly and accurately, and the temperature measurement results can be displayed using an electric meter, which helps the tester to detect abnormal temperature situations in a timely manner.

[0052] In describing the present disclosure, orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are orientations or positional relationships based on the contents shown in the drawings, and are intended merely to facilitate and simplify the description of the present disclosure, and do not indicate or imply that the devices or elements shown necessarily have a particular orientation or are constructed and operated in a particular orientation, and therefore should not be understood as limitations on the present disclosure.

[0053] Additionally, the terms "first" and "second" are used for descriptive purposes and should not be understood as indicating or implying relative importance or the number of technical features being presented. Thus, a feature qualified by "first" or "second" can explicitly or implicitly include at least one of the feature. In the description of this disclosure, unless explicitly and specifically limited, "plurality" means at least two, e.g., two, three, etc.

[0054] In this disclosure, unless otherwise clearly specified or limited, terms such as "attached," "contacted," "connected," and "fixed" should be understood in a broad sense. For example, they may be fixedly connected, detachably connected, or integrated. They may be mechanically connected, electrically connected, or capable of communicating with each other. They may be directly connected, indirectly connected via an intermediate medium, or may be internal communication between two elements or a mutually functional relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in this disclosure according to specific circumstances.

[0055] In this disclosure, unless expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first feature is in direct contact with the second feature, or that the first and second features are in indirect contact via an intermediate medium. Furthermore, a first feature being "above," "above," and "on the upper surface" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or may simply mean that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or may simply mean that the horizontal height of the first feature is lower than that of the second feature.

[0056] In this disclosure, the terms "one embodiment," "some embodiments," "one example," "specific example," or "some examples" mean that the specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, exemplary descriptions of the above terms do not necessarily refer to the same embodiment or example. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, unless mutually inconsistent, those skilled in the art may combine or combine different embodiments or examples and features of different embodiments or examples described herein.

[0057] Although the embodiments of the present disclosure have been shown and described above, the above embodiments are illustrative and should not be construed as limitations on the present disclosure. Those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure. [Explanation of symbols]

[0058] 1 Carbon Capture Unit 2 External circulation unit 21 Driving means 22 Temperature adjustment means 221 Heat exchanger 222 Heater 223 Cooler 23 External circulation line 231 Liquid inlet line 232 Liquid reflux line 3. Detection Assembly 31 First detection assembly 32 Secondary detection assembly 4 Back pressure valve 5 Defoaming device 6. Metering pump

Claims

1. 1. A carbon capture sorbent performance testing system comprising: a carbon capture unit that absorbs carbon dioxide by reacting the carbon dioxide with an absorbent solution; an external circulation unit comprising an external circulation line, a temperature adjusting means, and a driving means, wherein an inlet of the external circulation line is connected to a liquid outlet of the carbon capture unit, an outlet of the external circulation line is connected to a liquid inlet of the carbon capture unit, the temperature adjusting means and the driving means are both provided on the external circulation line, the temperature adjusting means adjusts the temperature of the absorbent solution in the external circulation line, and the driving means drives the absorbent solution to circulate between the external circulation line and the carbon capture unit; a detection assembly for detecting a carbon capture rate of the carbon capture unit; the temperature adjusting means includes a heater and a heat exchanger, the external circulation line includes a liquid inlet line communicating with a liquid outlet of the carbon capture unit, and a liquid return line communicating with a liquid inlet of the carbon capture unit; a cold source chamber of the heat exchanger communicates with the liquid inlet line, a heat source chamber of the heat exchanger communicates with the liquid return line, and the heater is provided in a line between an outlet of the cold source chamber and an inlet of the heat source chamber; the temperature adjustment means further includes a cooler provided in an outlet line of the heat source chamber and configured to cool the high-temperature absorbent solution flowing out of the heat source chamber; the external circulation unit further comprises a defoamer; A carbon capture absorbent performance testing system, characterized in that the driving means is provided between the liquid outlet of the carbon capture unit and the temperature adjustment means, and the defoaming device is provided between the driving means and the temperature adjustment means.

2. The detection assembly includes: a first detection assembly disposed at a gas inlet of the carbon capture unit for detecting the carbon dioxide content in the inlet gas; 2. The carbon capture sorbent performance testing system according to claim 1, further comprising: a second detection assembly provided at a gas outlet of the carbon capture unit for detecting the carbon dioxide content in the exhaust gas.

3. 2. The carbon capture sorbent performance testing system according to claim 1, wherein the heater is an electric heater or a heat pipe heater.

4. 2. The carbon capture sorbent performance testing system according to claim 1, wherein the external circulation unit further comprises a metering pump provided between the foam breaker and the temperature adjusting means.

5. 5. The carbon capture sorbent performance testing system according to claim 1, wherein the external circulation unit further comprises a back pressure valve provided in the external circulation line.

6. 5. The carbon capture sorbent performance testing system of claim 1, further comprising a temperature detection assembly that detects the temperatures of the liquid inlet and liquid outlet of the carbon capture unit and the inlet and outlet temperatures of each element of the external circulation unit.

7. the temperature detection assembly comprises a plurality of thermometers; 7. The carbon capture sorbent performance testing system according to claim 6, wherein a plurality of said thermometers are arranged corresponding to respective temperature measurement points, and said thermometers are K-type stainless steel thermocouples.

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