Carbon dioxide absorbent performance evaluation system

Abstract

The invention provides a carbon dioxide absorbent performance evaluation system, which is characterized in that an integrated evaluation platform comprising a gas source system, an absorption system and a measurement system is constructed by integrating multi-gas-source dynamic mixing, gas-liquid quality real-time monitoring and data automatic analysis technologies; the proportion of carbon dioxide and other gas components in simulated flue gas is accurately regulated and controlled through a gas mass flow meter, the overall mass change of gas and liquid in a gas washing bottle is continuously recorded through a weighing table with a heating function, and a dynamic absorption amount curve is generated in combination with temperature control and a data collection device; finally, the effects of simplifying the evaluation process, greatly reducing the time and equipment cost of an absorbent preliminary screening stage and avoiding traditional complex analysis steps are achieved, meanwhile, the absorption performance is directly quantified by monitoring the gas-liquid mass change in real time, the evaluation efficiency and accuracy are remarkably improved, and the method is suitable for popularization and application. And the potential harm to the health of experimenters caused by escape of amine reagents is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide capture applications, and in particular to a carbon dioxide absorbent performance evaluation system. Background Art

[0002] There are many types of absorbents to choose from during the laboratory development phase of carbon dioxide absorbents, including different types and contents of amine reagents.

[0003] In the evaluation of the carbon dioxide absorption performance of absorbents, especially when a large number of formula samples do not meet the optimal ratio, an important indicator of carbon dioxide absorbents is the carbon dioxide adsorption capacity.

[0004] Testing the overall quality of gas and liquid in the system as a preliminary performance evaluation can greatly reduce the workload, sample preparation, and instrument equipment investment.

[0005] Conventional CO2 absorbent performance evaluation requires analysis before and after the CO2 absorption reaction, including gas chromatography, nuclear magnetic resonance spectroscopy, and total organic carbon analysis. This complex and tedious process also makes it difficult to precisely control the mass fractions of each gas, hindering accurate and convenient adjustment to the desired CO2 concentration. Summary of the Invention

[0006] A first aspect of the present disclosure provides a carbon dioxide absorbent performance evaluation system, comprising:

[0007] The gas source system includes a carbon dioxide gas source, a nitrogen gas source, and a sulfur oxide / nitrogen oxide gas source. Each gas source is connected to a gas mixing tank via an independent gas mass flow meter;

[0008] A carbon dioxide absorption system includes a gas flow controller connected to the outlet of the gas mixing tank, and a gas washing bottle connected to the gas flow controller, wherein the gas washing bottle is used to contain a carbon dioxide absorbent;

[0009] The measurement system includes a weighing platform with a heating function, a thermometer and a data collection device, wherein the weighing platform is used to monitor the gas-liquid mixture quality in the washing bottle in real time, the thermometer is used to detect the temperature in the washing bottle, and the data collection device is connected to the weighing platform, the thermometer and the outlet of the washing bottle to collect mass, temperature and gas composition data, and calculate the carbon dioxide absorption amount through the overall gas-liquid mass change curve.

[0010] In combination with the first aspect, the gas source system further includes an oxygen gas source and an inert gas source, and the gas composition ratio of the gas mixing tank is adjusted by a mass flow meter to simulate a preset concentration of flue gas containing carbon dioxide.

[0011] In combination with the first aspect, the data collection device includes a data collector and a data receiving terminal. The data receiving terminal is a computer with data storage and calculation functions, which is used to generate gas-liquid quality change curves and absorption performance evaluation indicators in real time.

[0012] In combination with the first aspect, the heating function of the weighing platform is realized by a built-in temperature control module, which is used to maintain the absorbent in the washing bottle at a preset temperature environment.

[0013] In combination with the first aspect, the outlet of the gas washing bottle is connected to a gas analysis sensor for detecting the composition and concentration of the escaping gas, and the data collection device further corrects the absorption calculation result according to the escaping gas data.

[0014] In combination with the first aspect, the system further includes a pressure regulating device connected to the gas mixing tank and the gas washing bottle, for controlling the pressure parameters of the gas absorption process.

[0015] In combination with the first aspect, the evaluation index is the carbon dioxide absorption per unit mass of the absorbent under the same temperature and pressure conditions, which is used to screen different absorbent formulations.

[0016] Beneficial effects: The present invention provides a carbon dioxide absorbent performance evaluation system, which constructs an integrated evaluation platform including a gas source system, an absorption system and a measurement system by integrating dynamic mixing of multiple gas sources, real-time monitoring of gas-liquid quality and automatic data analysis technology; the ratio of carbon dioxide and other gas components in the simulated flue gas is accurately controlled by a gas mass flow meter, and the overall mass change of gas and liquid in the gas washing bottle is continuously recorded by a weighing table with a heating function, and a dynamic curve of absorption amount is generated in combination with temperature control and data collection devices; ultimately, the evaluation process is simplified, the time and equipment cost of the initial screening stage of the absorbent is greatly reduced, and the traditional complex analysis steps are avoided. At the same time, the absorption performance is directly quantified by real-time monitoring of gas-liquid quality changes, which significantly improves the evaluation efficiency and accuracy, and reduces the potential harm to the health of experimental personnel caused by the escape of amine reagents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a carbon dioxide absorbent performance evaluation system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0018] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure.

[0019] The terms used in the embodiments of the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present disclosure. The singular forms "a," "the," and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0020] like Figure 1 FIG. 1 is a schematic diagram of a carbon dioxide absorbent performance evaluation system according to an embodiment of the present disclosure, comprising:

[0021] The gas source system 110 includes a carbon dioxide gas source, a nitrogen gas source, and a sulfur oxide / nitrogen oxide gas source, each gas source being connected to a gas mixing tank via an independent gas mass flow meter;

[0022] The carbon dioxide absorption system includes a gas flow controller 120 connected to the outlet of the gas mixing tank, and a gas washing bottle 130 connected to the gas flow controller, wherein the gas washing bottle 130 is used to contain a carbon dioxide absorbent;

[0023] The measurement system includes a weighing platform 140 with a heating function, a thermometer 150 and a data collection device 160, wherein the weighing platform 140 is used to monitor the gas-liquid mixture quality in the washing bottle in real time, the thermometer 150 is used to detect the temperature in the washing bottle 130, and the data collection device 160 is connected to the weighing platform 140, the thermometer 150 and the outlet of the washing bottle 130, and is used to collect mass, temperature and gas composition data, and calculate the carbon dioxide absorption amount through the overall gas-liquid mass change curve.

[0024] Specifically, the gas source system (110) provides a mixed gas simulating flue gas containing carbon dioxide, and supports the flexible access of other gases (such as sulfur oxides and nitrogen oxides).

[0025] It contains independent carbon dioxide gas source, nitrogen gas source and reserved sulfur oxide / nitrogen oxide gas source. The flow rate of each gas is accurately controlled by a gas mass flow meter, and the gases are mixed in a gas mixing tank according to a preset ratio to generate simulated flue gas of the required concentration.

[0026] The reserved gas source design enhances the flexibility of the system and can simulate complex industrial flue gas environments (such as flue gas containing sulfur and nitrogen pollutants), which is close to actual application scenarios.

[0027] The gas flow controller (120) regulates the flow of the mixed gas into the gas washing bottle to ensure the stability of the absorption process. By receiving the mixed gas from the gas mixing tank, a constant flow rate is maintained through a flow control module (such as a solenoid valve or a proportional valve) to avoid the influence of gas fluctuations on the experimental results.

[0028] The gas washing bottle (130) serves as a core container for the absorption reaction, contains a carbon dioxide absorbent (such as an amine solution) and generates a gas-liquid reaction with the mixed gas.

[0029] When the mixed gas passes through the scrubbing bottle, carbon dioxide is captured by the absorbent and other gases (such as unreacted nitrogen and possible escape gas) are discharged from the outlet.

[0030] The weighing platform (140) with heating function monitors the change of the gas-liquid mixed mass in the gas washing bottle in real time and maintains the absorbent temperature constant.

[0031] The total mass of the scrubber (initial mass of the absorbent + mass of absorbed carbon dioxide) is continuously recorded by a high-precision weighing sensor to generate a mass-time curve.

[0032] A built-in temperature control module (such as an electric heating plate or a circulating water bath interface) keeps the gas washing bottle at a set temperature (such as 30-80°C) to simulate the absorption performance under different working conditions.

[0033] The thermometer (150) detects the temperature of the absorbent in the gas washing bottle in real time to ensure the consistency of the experimental conditions.

[0034] The data collection device (160) integrates mass, temperature and gas composition data, automatically calculates carbon dioxide absorption and generates evaluation indicators, and receives mass data from the weighing platform, temperature data from the thermometer, and composition analysis data from the gas sensor at the outlet of the gas washing bottle (such as an infrared CO2 sensor or a mass spectrometer).

[0035] The amount of carbon dioxide absorbed per unit time is calculated through software algorithms (such as mass difference subtraction), a dynamic absorption curve is generated, and performance evaluation results (such as maximum absorption rate and saturated absorption capacity) are output.

[0036] The gas source system regulates the mass flow of gases such as CO2 and N2 to generate simulated flue gas of the target concentration. The mixed gas enters the scrubber through a flow controller, where it reacts with the absorbent, capturing the CO2. A weighing platform records changes in gas and liquid mass, a thermometer monitors temperature, and a gas sensor detects outlet gas composition. A data collection device integrates all parameters to generate a mass change curve, automatically calculating absorption capacity and performance indicators.

[0037] Beneficial effects: Through the above design, this system significantly improves the evaluation efficiency and accuracy of carbon dioxide absorbents, and provides a low-cost, high-reliability experimental platform for the research and development of carbon capture technology.

[0038] Furthermore, the gas source system also includes an oxygen gas source and an inert gas source, and the gas composition ratio of the gas mixing tank is adjusted by a mass flow meter to simulate a preset concentration of flue gas containing carbon dioxide.

[0039] Specifically, in actual industrial environments, carbon dioxide usually does not exist alone, but is mixed with other gases (such as oxygen, nitrogen, inert gases, sulfur oxides, nitrogen oxides, etc.). For example:

[0040] Flue gas from coal-fired power plants: Main components are CO2 (about 3%-15%), O2 (5%-10%), N2 (70%-75%), and may also contain trace amounts of SO2 and NO x .

[0041] Steel plant flue gas: CO2 concentration may be higher, and is accompanied by a certain amount of CO (hydrocarbons), O2 and a small amount of inert gases (such as Ar).

[0042] Cement plant flue gas: CO2 concentration is usually high and accompanied by NO x and SO2.

[0043] Because flue gas compositions vary from industrial source to industrial source, experiments using only CO2 cannot truly simulate the absorbent's performance in real-world environments. Therefore, increasing the supply of oxygen (O2) and inert gases (such as argon (Ar) or helium (He)) and precisely controlling their ratios with a mass flow meter can better simulate different flue gas environments and improve the accuracy and reliability of the experiment.

[0044] Furthermore, the data collection device includes a data collector and a data receiving terminal. The data receiving terminal is a computer with data storage and calculation functions, which is used to generate gas-liquid quality change curves and absorption performance evaluation indicators in real time.

[0045] Specifically, during the performance evaluation of carbon dioxide absorbents, it is necessary to monitor changes in gas-liquid mass, temperature, and escaping gas composition in real time, and calculate absorption performance evaluation indicators based on these data. This requires an efficient data collection and processing system to:

[0046] Record experimental data in real time to ensure data integrity and accuracy;

[0047] Automatically generate absorbent performance curves to facilitate the study of the absorbent's absorption rate and maximum absorption capacity;

[0048] Reduce human errors, avoid lags and errors in manual data reading, and improve the repeatability and comparability of experiments.

[0049] The data collection device consists of two parts:

[0050] The data collector is mainly used to obtain experimental data. It is connected to various sensors, including:

[0051] Weighing platform data interface: used to collect gas and liquid mass change data of the gas washing bottle;

[0052] Temperature sensor interface: used to monitor the temperature of the absorbent;

[0053] Gas analysis sensor interface (such as infrared CO2 sensor, SO2 / NO x Sensor): used to detect the escaping gas composition at the outlet of the gas washing bottle;

[0054] Pressure sensor interface: used to monitor the gas pressure in the system to optimize experimental conditions.

[0055] The data collector can be an embedded data acquisition module or a single-chip microcomputer / PLC. Its core functions are:

[0056] Collect data from each sensor in real time; perform preliminary data processing (such as filtering and normalization); and transmit the data to the data receiving terminal.

[0057] The data receiving terminal is typically a computer with data storage and computing capabilities. It may be an industrial personal computer (IPC), an embedded computing device, or a cloud computing platform. Its functions include:

[0058] Data storage: Real-time storage of experimental data to ensure data traceability;

[0059] Data operations: Calculate the gas-liquid mass change curve (through time series analysis); calculate the carbon dioxide absorption rate (determined by the mass change rate); calculate the CO2 absorption capacity per unit mass of absorbent (core evaluation indicator); combine temperature, pressure and other data to modify the absorption performance and optimize the experimental results;

[0060] Generate visual curves: mass change curve (X-axis: time, Y-axis: absorbent mass or CO2 absorption); absorption rate curve (X-axis: time, Y-axis: absorption rate, unit g / min or g / h); temperature-absorption amount correlation curve (used to analyze the effect of temperature on absorption performance).

[0061] Data processing can be performed using MATLAB, Python (Pandas + Matplotlib), LabVIEW or SCADA system.

[0062] Furthermore, the heating function of the weighing platform is realized by a built-in temperature control module, which is used to maintain the absorbent in the washing bottle at a preset temperature environment.

[0063] Specifically, during the performance test of carbon dioxide absorbents, temperature has a significant impact on the absorption capacity and absorption rate of the absorbent. Different types of absorbents (such as amines, carbonates, or metal oxides) have large differences in absorption efficiency at different temperatures. Therefore:

[0064] Ensure that the experimental environment temperature is stable to avoid ambient temperature fluctuations affecting the absorption capacity of the absorbent;

[0065] Control the reaction temperature of the absorbent to meet the setting of industrial application environment (such as 40℃-80℃);

[0066] Improve data accuracy and repeatability and reduce experimental errors caused by temperature changes.

[0067] The main function of the weighing platform is to monitor the mass changes of the gas washing bottle and the absorbent inside it in real time. However, temperature changes may cause changes in the physical properties of the absorbent (such as solvent evaporation and viscosity changes); changes in the absorption rate (such as the rate of chemical absorption or physical adsorption is affected by temperature).

[0068] Therefore, the weighing table has an integrated heating function to keep the experimental temperature stable.

[0069] The temperature control module is integrated into or under the weighing platform and includes heating elements (such as resistance wire, PTC heater, hot plate), providing a uniform and stable heating source to keep the gas washing bottle within the preset temperature range.

[0070] The heating element can be selected from resistance heating (Ni-Cr alloy wire): fast heating, suitable for fine control; PTC (positive temperature coefficient) heating plate: adaptive temperature control, high safety; thermal radiation heating plate: suitable for large area heating, even heat distribution.

[0071] Temperature sensors (such as thermocouples and PT100 thermistors) detect the temperature of the heating area and feed it back to the temperature control unit to ensure temperature stability.

[0072] You can choose K-type thermocouple (suitable for a wide temperature range of 0-1000℃); PT100 platinum resistance (high precision, suitable for laboratory environment of 0-200℃).

[0073] The temperature control unit (such as a PID controller or temperature control chip) automatically adjusts the heating power based on sensor data to ensure that the temperature is maintained at a preset value.

[0074] Control mode: PID (proportional-integral-differential) control: precise temperature control, suitable for laboratory precision testing; ON-OFF (switch) control: suitable for situations where temperature changes are insensitive.

[0075] If the temperature is lower than the set value, the temperature control unit increases the heating power; if the temperature exceeds the set value, the temperature control unit reduces the heating power or turns off the heating element; PID adjustment can reduce temperature fluctuations and improve temperature control accuracy (±0.1℃ level).

[0076] The temperature inside the gas washing bottle gradually stabilizes, and the absorbent absorbs CO2 at the optimal temperature; the temperature control system runs continuously to ensure constant temperature throughout the experiment.

[0077] The weighing platform's heating function is achieved through a built-in temperature control module, ensuring that the absorbent operates at a preset temperature. The module's core technologies include a heating element, temperature sensor, PID temperature control unit, and safety protection mechanism to ensure stable temperature control, improve experimental accuracy and repeatability, and optimize the performance evaluation process of the CO2 absorbent.

[0078] Furthermore, the outlet of the gas washing bottle is connected to a gas analysis sensor for detecting the composition and concentration of the escaping gas, and the data collection device further corrects the absorption calculation result according to the escaping gas data.

[0079] Specifically, in performance evaluation experiments for CO2 absorbers, the amount of CO2 absorbed is typically calculated by monitoring the mass change of the gas-liquid mixture within the scrubber. However, the following issues may arise during the experiment: some CO2 is not fully absorbed by the absorbent and is discharged from the scrubber outlet with the airflow; or the absorption reaction may generate byproducts such as CO, NO2, or SO2, which escape together with the CO2.

[0080] The traditional method only measures the mass change through a weighing table, but ignores the unabsorbed CO2;

[0081] The escaping gas will lead to an overestimation of the absorption amount, thus affecting the true performance evaluation of the absorbent.

[0082] Therefore, a gas analysis sensor is introduced to detect the composition and concentration of the escaping gas at the outlet of the gas washing bottle in real time, and the CO2 absorption amount is corrected in combination with the data collection device to improve the calculation accuracy.

[0083] The gas analysis sensor is installed at the outlet of the gas washing bottle. Its core function is to detect the composition and concentration of the escaping gas to ensure more accurate calculation of the absorption amount.

[0084] Depending on the experimental requirements, the sensor can detect CO2 and other possible escape gases such as O2, NOx, SOx, etc.:

[0085] Non-dispersive infrared (NDIR) CO2 sensor: Suitable for high concentration CO2 detection (0.1% to 100%). It measures CO2 concentration based on infrared absorption and has strong anti-interference capabilities.

[0086] Laser spectroscopy CO2 sensor: Based on tunable diode laser absorption spectroscopy (TDLAS), it has higher accuracy and can be used for ppm-level concentration measurement.

[0087] Electrochemical NOx / SOx sensor: used to detect byproduct concentration and ensure the stability of gas composition during the experiment.

[0088] Oxygen sensor: monitors O2 levels to correct for oxygen interference in CO2 absorption calculations.

[0089] The data collection device is connected to the gas analysis sensor and is used to receive, store and process the escape gas data and further correct the CO2 absorption calculation result.

[0090] The outlet of the gas scrubber is connected to a gas analysis sensor to detect CO2 escape in real time, ensuring more accurate calculation of the absorption amount. The data collection device combines the gas analysis data to correct the CO2 absorption calculation to avoid overestimating the absorption performance. This solution improves experimental accuracy and data reliability, and provides a more scientific basis for the screening of different absorbents.

[0091] Furthermore, the system also includes a pressure regulating device connected to the gas mixing tank and the gas washing bottle, which is used to control the pressure parameters of the gas absorption process.

[0092] Specifically, in the carbon dioxide absorbent performance evaluation system, the experimental process usually involves different gas mixtures, and the pressure changes within the system will affect the gas solubility, absorption rate and experimental repeatability.

[0093] Therefore, the introduction of a pressure regulating device can effectively stabilize the gas flow state inside the system, control the dissolution rate of CO2 into the absorption liquid, and ensure the accuracy and repeatability of the experimental results.

[0094] Inlet pressure control: Pressure Regulator: Installed at the outlet of the gas mixing tank to reduce and stabilize the output pressure of the mixed gas.

[0095] Mass flow controller (MFC): used in conjunction with the pressure reducing valve to ensure a constant gas flow into the gas washing bottle.

[0096] Pressure regulation in the gas washing bottle: Back pressure regulating valve (BPR): installed at the outlet of the gas washing bottle, used to control the pressure in the bottle to avoid pressure instability caused by changes in air flow rate.

[0097] Gas buffer tank (optional): used to balance gas fluctuations and reduce the impact of instantaneous pressure changes.

[0098] Pressure sensor: installed in key locations of gas mixing tanks, gas washing bottles and pipelines to monitor the pressure in the system in real time;

[0099] Connect to data collection device for feedback control and automatic pressure adjustment.

[0100] Pressure stability control: The pressure reducing valve + mass flow controller combination ensures constant pressure when the gas enters the gas washing bottle.

[0101] The back pressure regulating valve is used to maintain the preset pressure in the gas washing bottle to prevent sudden changes in flow from affecting the absorption reaction.

[0102] Dynamic pressure adjustment: Automatically adjust the CO2 supply pressure based on experimental requirements to simulate the absorption process under different working conditions, such as normal pressure, pressurized (such as industrial flue gas conditions) or vacuum environment (special absorbent testing).

[0103] Furthermore, the evaluation index is the carbon dioxide absorption per unit mass of the absorbent under the same temperature and pressure conditions, which is used to screen different absorbent formulations.

[0104] Specifically, to ensure accurate calculations, this system uses real-time data acquisition and mass change measurement, combined with gas composition analysis, to calculate CO2 absorption. As CO2 is absorbed, the system's mass changes. The weighing platform monitors the mass increment of the scrubber in real time to calculate the actual CO2 absorption.

[0105] Since some CO2 may not be completely absorbed and discharged from the system with the air flow, the system installs a gas analysis sensor at the outlet of the scrubber to detect the CO2 concentration in the escaping gas.

[0106] This integral term represents the total mass of escaping CO2 and needs to be deducted from the total amount absorbed to obtain the true absorption capacity.

[0107] By comparing the CO2 absorption per unit mass of absorbents with different formulas, high-efficiency absorbents are screened out; by combining factors such as absorption rate and regeneration performance, the absorbent formula is optimized to enhance its industrial application value.

[0108] By adjusting the gas source composition (CO2, O2, SO2, NOx, etc.), the absorption capacity of the absorbent in the actual flue gas environment is evaluated; combined with the evaluation indicators, the absorbent's resistance to impurities in the flue gas is determined to improve industrial applicability.

[0109] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure, and should all be included in the scope of protection of the present disclosure.

Claims

1. A carbon dioxide absorbent performance evaluation system, characterized in that: include: The gas source system includes a carbon dioxide gas source, a nitrogen gas source, and a sulfur oxide / nitrogen oxide gas source. Each gas source is connected to a gas mixing tank via an independent gas mass flow meter; A carbon dioxide absorption system includes a gas flow controller connected to the outlet of the gas mixing tank, and a gas washing bottle connected to the gas flow controller, wherein the gas washing bottle is used to contain a carbon dioxide absorbent; The measurement system includes a weighing platform with a heating function, a thermometer and a data collection device, wherein the weighing platform is used to monitor the gas-liquid mixture quality in the washing bottle in real time, the thermometer is used to detect the temperature in the washing bottle, and the data collection device is connected to the weighing platform, the thermometer and the outlet of the washing bottle to collect mass, temperature and gas composition data, and calculate the carbon dioxide absorption amount through the overall gas-liquid mass change curve.

2. The system according to claim 1, wherein: The gas source system further includes an oxygen gas source and an inert gas source. The gas composition ratio of the gas mixing tank is adjusted by a mass flow meter to simulate a preset concentration of flue gas containing carbon dioxide.

3. The system according to claim 1, wherein: The data collection device includes a data collector and a data receiving terminal. The data receiving terminal is a computer with data storage and calculation functions, and is used to generate a gas-liquid quality change curve and an absorption performance evaluation index in real time.

4. The system according to claim 1, wherein: The heating function of the weighing platform is realized by a built-in temperature control module, which is used to maintain the absorbent in the washing bottle at a preset temperature environment.

5. The system according to claim 1, wherein: The outlet of the gas washing bottle is connected to a gas analysis sensor for detecting the composition and concentration of the escaping gas. The data collection device further corrects the absorption calculation result based on the escaping gas data.

6. The system according to claim 1, wherein: The system also includes a pressure regulating device connected to the gas mixing tank and the gas washing bottle, and is used to control the pressure parameters of the gas absorption process.

7. The system according to claim 1, wherein: The evaluation index is the carbon dioxide absorption per unit mass of absorbent under the same temperature and pressure conditions, and is used to screen different absorbent formulations.

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