A method and apparatus for simultaneous analysis of adsorption process kinetics and thermodynamics

Abstract

The application discloses a method and device for synchronously analyzing adsorption process kinetics and thermodynamics, which obtains dynamic adsorption curves and heat absorption and release curves by synchronously recording mass change and heat change of an adsorbent in an adsorption medium, and then carries out fitting or integral calculation on the curves to obtain a kinetic diffusion time constant of the adsorbent to an adsorbate and an adsorption enthalpy value, so that adsorption behaviors of the adsorbent are synchronously analyzed from the aspects of kinetics and thermodynamics. The test method disclosed by the application is more real and objective than a previous theoretical calculation method, has high accuracy, saves time and effort, and solves the problem of synchronous determination of the diffusion time constant and the adsorption enthalpy in the adsorption process of the adsorbent, so that it is convenient to further study adsorption behavior differences of the adsorbent to different adsorbates and an adsorption separation mechanism.

Description

Technical Field

[0001] This invention relates to the field of adsorption process technology, and in particular to a method and apparatus for simultaneous analysis of adsorption process kinetics and thermodynamics. Background Technology

[0002] Separation and purification of products in industrial production are essential steps for achieving final application, but they are also extremely energy-intensive processes. Adsorption separation technology can significantly improve separation efficiency and reduce energy consumption, thus attracting widespread research. Adsorption separation technology mainly relies on the differences in adsorption and desorption behavior of adsorbents on different media to achieve separation, including molecular sieving, thermodynamic separation, and kinetic separation. Molecular sieving, also known as steric hindrance, occurs because the adsorbate molecules have different sizes and shapes, and the adsorbent channels only allow certain components to enter, preventing others from entering. Thermodynamic separation mainly relies on the different affinities between the adsorbent surface and the adsorbate, resulting in different adsorption effects and achieving separation. These differences in affinity manifest as different adsorption enthalpies. Currently, adsorption enthalpies are mainly obtained through simulation calculations, such as fitting adsorption isotherms using the Viral equation, Langmuir-Freundlich equation, and Clausius-Clapeyron equation. However, the goodness of fit is affected by subjective factors and the fitting model, resulting in significant errors, and not all adsorption curves can find suitable fitting models. Kinetic separation primarily relies on the different diffusion rates of components after they enter the adsorbent. However, the diffusion rate depends not only on the specific diffusion mechanism (molecular diffusion, Knudsen diffusion, surface diffusion, etc.) but also on the configuration of the adsorbate molecules, the pore structure of the adsorbent, the affinity between the adsorbate and adsorbent, the composition of the mixed components, and temperature, making it a more complex process. Characterization of kinetic separation mainly relies on time-varying kinetic adsorption tests, but this aspect is still relatively rarely discussed in current research papers.

[0003] The actual separation process of adsorbents from mixed components is usually related to both thermodynamic and kinetic factors, involving the synergistic effects of multiple mechanisms. This is especially true for mixed components with similar sizes and shapes, where a single mechanism is often insufficient for efficient separation. Therefore, simultaneous thermodynamic and kinetic analysis helps to gain a deeper understanding of the adsorption mechanism of adsorbents and can guide the precise design of adsorbent materials, which is of great significance for improving the separation selectivity of adsorbents. However, most existing mechanistic research methods are based on theoretical simulations, numerical calculations, or single-factor studies. For example, CN104897508A invented a method for testing the thermodynamic parameters of functional materials. It uses a resonant microcantilever beam to test the adsorption isotherm curve of the material and then calculates the adsorption enthalpy using the Clausius-Clapeyron equation. This method does not directly measure the heat change during the adsorption process experimentally, resulting in subjective analytical errors in the calculation process, and it fails to simultaneously obtain kinetic parameters. For example, CN113433029A invented a device and method for testing adsorption kinetics and heat of adsorption. It uses pressure measuring elements and temperature measuring elements to obtain the adsorption kinetic curve and the temperature change of the sample cell, and then converts them into adsorption rate and heat of adsorption respectively. Although this method can test the heat of adsorption simultaneously, the heat released during the sample adsorption process is low, and the accuracy of the temperature measuring elements used is very limited, which affects the test results. In addition, the device cannot control the test temperature and does not have a steam generating device, so it cannot realize adsorption test and steam adsorption test at different temperatures. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a method and apparatus for simultaneous analysis of the kinetics and thermodynamics of the adsorption process, particularly for simultaneously testing the kinetic diffusion time constant and adsorption enthalpy during the adsorption of a gaseous or vaporous adsorption medium by an adsorbent, so as to facilitate the analysis of the adsorption behavior of the adsorbent from a kinetic and thermodynamic perspective.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for simultaneous analysis of the kinetics and thermodynamics of an adsorption process, specifically comprising the following steps:

[0006] Step 1: In-situ activation treatment of the adsorbent;

[0007] Step 2: Simultaneous testing of the dynamic adsorption process and thermal change signal of the adsorbent;

[0008] Step 3: Simultaneous kinetic and thermodynamic analysis.

[0009] In a preferred embodiment, step 1 specifically includes: placing the adsorbent in a crucible, placing the crucible at the left end of the sample holder of the synchronous thermal analyzer (1), and placing a similar empty crucible at the right end of the sample holder as a reference crucible; closing the exhaust valve (9) of the synchronous thermal analyzer; opening the pumping valve (10) of the synchronous thermal analyzer; setting the heating program on the synchronous thermal analyzer; turning on the vacuum pump (4) to start the activation of the adsorbent; until the weight of the adsorbent reaches equilibrium, the vacuum pump can be turned off to end the activation; closing the pumping valve (10); turning on the protective gas (7) and the second purge gas (6); backfilling the gas until atmospheric pressure is reached; and then opening the exhaust port (9) of the synchronous thermal analyzer.

[0010] In a preferred embodiment, step 2 is specifically divided into two parts: sample testing and baseline testing.

[0011] a. Sample testing: Set the protective gas flow rate and keep it constant; if the adsorbate to be tested is vapor, open the first purge gas and open the exhaust valve (11) to fully purge; if the adsorbate to be tested is other gas, open the second purge gas and set an appropriate purge gas flow rate; set an appropriate test temperature, and after the temperature is constant, click to start the test, and at the same time close the exhaust valve (11); use a computer (8) to record the mass change and heat change of the sample, and obtain the TG curve and thermal change curve of the sample respectively.

[0012] b. Baseline test: Replace the crucible containing the sample on the left end of the sample holder of the synchronous thermal analyzer (1) with an empty crucible. The steps for testing the baseline are the same as those for testing the sample.

[0013] c. Subtracting the baseline from the sample test curve yields the final TG curve and thermal change curve.

[0014] In a preferred embodiment, step 3 specifically includes:

[0015] (1) Calculation of kinetic diffusion time constant: According to diffusion equation (1), the dynamic adsorption data points of the sample in the low-pressure region are taken, and q is used as the time constant. t / q e right Plot the graph, obtain the slope k through linear fitting, and calculate the diffusion time constant (D / r) of the adsorbate in the sample according to formula (2). 2 );

[0016]

[0017]

[0018] In the formula, q t Let q be the amount of adsorbate adsorbed by the sample at time t (mg / g). edenoted as the adsorption amount at adsorption equilibrium (mg / g), where D is the diffusion coefficient of the adsorbate in the sample, and r is the radius of the equivalent sphere.

[0019] (2) Calculation of thermodynamic adsorption enthalpy: Integrate the peak value of the final thermal change curve to obtain the integral area S (J / g), and calculate the adsorption enthalpy ΔH according to formula (3). ads ;

[0020]

[0021] Here, q e,m The adsorption amount at adsorption equilibrium is expressed as mmol / g.

[0022] This invention provides a device for simultaneous analysis of adsorption process kinetics and thermodynamics, and a method for simultaneous analysis of adsorption process kinetics and thermodynamics as described above, comprising a simultaneous thermal analyzer (1), a steam generator (2), a constant temperature circulating water bath (3), a vacuum pump (4), a mass flow meter (5-7), and a computer (8); the simultaneous thermal analyzer (1) is connected to the steam generator (2), the constant temperature circulating water bath (3), the vacuum pump (4), the mass flow meter (5-7), and the computer (8);

[0023] The simultaneous thermal analyzer can simultaneously test the thermogravimetric (TG) change and thermal change of the adsorbent, specifically including differential scanning calorimetry (DSC) change or differential thermal (DTC) change; the vapor generator has a self-heating function and pipeline insulation function, with a temperature control range of not less than 20-80℃, and the solvent in the vapor generator can be added or replaced as needed; the constant temperature circulating water bath can control the temperature range of not less than 20-100℃; the ultimate vacuum degree of the vacuum pump is not less than 0.01mbar.

[0024] In a preferred embodiment, the adsorbent comprises porous materials, metal-organic frameworks (MOFs), polymers, carbon nanomaterials, silica, and molecular sieves.

[0025] Compared with the prior art, the present invention has the following advantages: The testing method of the present invention is more realistic and objective than the previous theoretical calculation and testing methods, with higher accuracy and testing precision, and saves time and effort. It solves the problem of simultaneous determination of diffusion time constant and adsorption enthalpy during adsorption of adsorbent, which facilitates further research on the differences in adsorption behavior of adsorbents for different adsorbates and the adsorption separation mechanism. Moreover, it is equipped with a vapor generator, which can realize the testing of different components such as gas and vapor, and has a wider range of applications. Attached Figure Description

[0026] Figure 1 A schematic diagram of the testing apparatus involved in this invention;

[0027] Figure 2 This invention utilizes microporous MOF-1 as an adsorbent to calculate the adsorption curve, diffusion time constant, and adsorption enthalpy of water vapor.

[0028] Figure 3 This invention utilizes microporous MOF-2 as an adsorbent to calculate the adsorption curve, diffusion time constant, and adsorption enthalpy of methanol vapor.

[0029] Figure 4 This invention utilizes MOF-3 as an adsorbent to calculate the adsorption curve, diffusion time constant, and adsorption enthalpy of CO2.

[0030] Figure reference numerals: 1—Synchronous thermal analyzer, 2—Steam generator, 3—Constant temperature circulating water bath, 4—Vacuum pump, 5—Mass flow meter, 6—Mass flow meter, 7—Mass flow meter, 8—Computer, 9—Exhaust valve, 10—Evacuation valve, 11—Pull valve. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application; as used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise; furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] Example 1

[0035] like Figure 1 As shown, the device used for simultaneous analysis of the kinetics and thermodynamics of the adsorption process in this embodiment consists of a simultaneous thermal analyzer, a steam generator, a constant temperature circulating water bath, a vacuum pump, a mass flow meter, and a computer. The simultaneous thermal analyzer (1) is connected to the steam generator (2), the constant temperature circulating water bath (3), the vacuum pump (4), the mass flow meter (5-7), and the computer (8).

[0036] The simultaneous thermal analyzer can simultaneously test the thermogravimetric (TG) changes and differential scanning calorimetric (DSC) changes of the adsorbent. The steam generator has self-heating and pipeline insulation functions, with a temperature set to 35°C, and is filled with ultrapure water. The constant-temperature circulating water bath can control the temperature range from 20 to 100°C. The ultimate vacuum of the vacuum pump is 0.01 mbar.

[0037] The adsorbent used in this embodiment is microporous MOF-1.

[0038] The specific testing steps are as follows:

[0039] (1) In-situ activation treatment of the adsorbent:

[0040] a. Place approximately 10 mg of MOF-1 in a crucible and place it on the left end of the sample holder of the synchronous thermal analyzer (1). At the same time, place a similar empty crucible on the right end of the sample holder as a reference crucible. Close the exhaust valve (9) of the synchronous thermal analyzer and open the suction valve (10). Set the heating program on the synchronous thermal analyzer as follows: heat from 25℃ to 110℃ at 10K / min, hold the temperature for 12 hours, and then cool naturally to 25℃. Turn on the vacuum pump (4) and then click the start program to start the activation of the adsorbent. After activation, turn off the vacuum pump and the suction valve (10). Turn on the protective gas (7) and the purge gas 2 (6). Both gases are N2, and the gas flow rate is set to 20 mL / min until the sample chamber returns to normal pressure. Then open the exhaust port (9) of the synchronous thermal analyzer.

[0041] (2) Dynamic adsorption process of the adsorbent and simultaneous DSC testing:

[0042] It is divided into two parts: sample testing and baseline testing.

[0043] a. Sample testing: Set the protective gas flow rate to 20 mL / min; turn on purge gas 1, which is air, and set the flow rate to 10 mL / min. First, open the vent valve (11) to fully vent the gas. Set the test temperature to 35℃. After the temperature stabilizes, click "Start Test" and close the vent valve (11) at the same time. Use a computer (8) to record the mass change and heat change of MOF-1 after adsorbing water vapor, and obtain the TG curve and DSC curve of the sample respectively.

[0044] b. Baseline test: Replace the crucible containing the sample on the left end of the sample holder of the synchronous thermal analyzer (1) with an empty crucible. The steps for testing the baseline are the same as those for testing the sample.

[0045] c. Subtracting the baseline from the sample test curve yields the final TG curve and DSC curve (e.g., Figure 2 a).

[0046] (3) Simultaneous analysis of kinetics and thermodynamics:

[0047] a. Calculation of kinetic diffusion time constant: According to the diffusion equation (1), the dynamic adsorption data points of the sample in the low-pressure region are taken, and q is used as the time constant. t / q e right Plot the graph, obtain the slope k through linear fitting, and calculate the diffusion time constant (D / r) of the adsorbate in the sample according to formula (2). 2 )(like Figure 2 b).

[0048]

[0049]

[0050] In the formula, q t Let q be the amount of water vapor adsorbed by the sample at time t (mg / g). e denoted as the adsorption amount at adsorption equilibrium (mg / g), D is the diffusion coefficient of the adsorbate in the sample, and r is the radius of the equivalent sphere.

[0051] b. Calculation of thermodynamic adsorption enthalpy: Integrate the peak value of the final DSC curve to obtain the integration area S (J / g), and calculate the adsorption enthalpy ΔH according to formula (3). ads (like Figure 2 a).

[0052]

[0053] Here, q e,m The adsorption amount at adsorption equilibrium is expressed as mmol / g.

[0054] Example 2

[0055] The testing apparatus used in this embodiment is the same as in Embodiment 1, except that the solvent in the vapor generator is replaced with anhydrous methanol solution and the adsorbent is replaced with microporous MOF-2.

[0056] The specific testing steps are as follows:

[0057] (1) In-situ activation treatment of the adsorbent:

[0058] a. Place approximately 10 mg of MOF-2 in a crucible and place it on the left end of the sample holder of the synchronous thermal analyzer (1). At the same time, place a similar empty crucible on the right end of the sample holder as a reference crucible. Close the exhaust valve (9) of the synchronous thermal analyzer and open the suction valve (10). Set the heating program on the synchronous thermal analyzer as follows: heat from 25℃ to 100℃ at 10K / min, hold the temperature for 12 hours, and then cool naturally to 25℃. Turn on the vacuum pump (4) and then click the start program to begin the activation of the adsorbent. After activation, turn off the vacuum pump and the suction valve (10). Turn on the protective gas (7) and the purge gas 2 (6). Both gases are N2, and the gas flow rate is set to 20 mL / min until the sample chamber returns to normal pressure. Then open the exhaust port (9) of the synchronous thermal analyzer.

[0059] (2) Dynamic adsorption process of the adsorbent and simultaneous DSC testing:

[0060] It is divided into two parts: sample testing and baseline testing.

[0061] a. Sample testing: Set the protective gas flow rate to 20 mL / min; turn on purge gas 1, which is air, and set the flow rate to 10 mL / min. First, open the vent valve (11) to fully vent the gas. Set the test temperature to 35℃. After the temperature stabilizes, click "Start Test" and close the vent valve (11) at the same time. Use a computer (8) to record the mass change and heat change of MOF-2 after adsorbing methanol vapor, and obtain the TG curve and DSC curve of the sample respectively.

[0062] b. Baseline test: Replace the crucible containing the sample on the left end of the sample holder of the synchronous thermal analyzer (1) with an empty crucible. The steps for testing the baseline are the same as those for testing the sample.

[0063] c. Subtracting the baseline from the sample test curve yields the final TG curve and DSC curve (e.g., Figure 3 a).

[0064] (3) Simultaneous analysis of kinetics and thermodynamics:

[0065] a. Calculation of kinetic diffusion time constant: According to the diffusion equation (1), the dynamic adsorption data points of the sample in the low-pressure region are taken, and q is used as the time constant. t / q e right Plot the graph, obtain the slope k through linear fitting, and calculate the diffusion time constant (D / r) of the adsorbate in the sample according to formula (2). 2 )(like Figure 3 b).

[0066]

[0067]

[0068] In the formula, q t Let q be the amount of methanol vapor adsorbed by the sample at time t (mg / g). e denoted as the adsorption amount at adsorption equilibrium (mg / g), D is the diffusion coefficient of the adsorbate in the sample, and r is the radius of the equivalent sphere.

[0069] b. Calculation of thermodynamic adsorption enthalpy: Integrate the peak value of the final DSC curve to obtain the integration area S (J / g), and calculate the adsorption enthalpy ΔH according to formula (3). ads (like Figure 3 a).

[0070]

[0071] Here, q e,m The adsorption amount at adsorption equilibrium is expressed as mmol / g.

[0072] Example 3

[0073] The apparatus used in this embodiment for simultaneous analysis of the kinetics and thermodynamics of the adsorption process consists of a simultaneous thermal analyzer, a protective gas, a purge gas 2, a constant temperature circulating water bath, a vacuum pump, a mass flow meter, and a computer. The simultaneous thermal analyzer (1) is connected to the constant temperature circulating water bath (3), the vacuum pump (4), the mass flow meter (5-7), and the computer (8).

[0074] The simultaneous thermal analyzer can simultaneously test the thermogravimetric (TG) changes and differential scanning calorimetric (DSC) changes of the adsorbent. The constant temperature circulating water bath can control the temperature range from 20 to 100°C. The ultimate vacuum of the vacuum pump is 0.01 mbar.

[0075] The adsorbent used in this embodiment is MOF-3.

[0076] The specific testing steps are as follows:

[0077] (1) In-situ activation treatment of the adsorbent:

[0078] a. Place approximately 10 mg of MOF-3 in a crucible and place it on the left end of the sample holder of the synchronous thermal analyzer (1). At the same time, place a similar empty crucible on the right end of the sample holder as a reference crucible. Close the exhaust valve (9) of the synchronous thermal analyzer and open the suction valve (10). Set the heating program on the synchronous thermal analyzer as follows: heat from 25℃ to 100℃ at 10K / min, hold the temperature for 12 hours, and then cool naturally to 25℃. Turn on the vacuum pump (4) and then click the start program to start the activation of the adsorbent. After activation, turn off the vacuum pump and the suction valve (10). Turn on the protective gas (7) and the purge gas 2 (6). Both gases are N2, and the gas flow rate is set to 20 mL / min until the sample chamber returns to normal pressure. Then open the exhaust port (9) of the synchronous thermal analyzer.

[0079] (2) Dynamic adsorption process of the adsorbent and simultaneous DSC testing:

[0080] It is divided into two parts: sample testing and baseline testing.

[0081] a. Sample testing: Set the protective gas flow rate to 20 mL / min; turn on purge gas 2, which is CO2, set the flow rate to 10 mL / min, and set the test temperature to 35℃. After the temperature stabilizes, click "Start Test". The mass change and heat change of MOF-3 after adsorbing CO2 were recorded by computer (8), and the TG curve and DSC curve of the sample were obtained respectively.

[0082] b. Baseline test: Replace the crucible containing the sample on the left end of the sample holder of the synchronous thermal analyzer (1) with an empty crucible. The steps for testing the baseline are the same as those for testing the sample.

[0083] c. Subtracting the baseline from the sample test curve yields the final TG curve and DSC curve (e.g., Figure 4 a).

[0084] (3) Simultaneous analysis of kinetics and thermodynamics:

[0085] a. Calculation of kinetic diffusion time constant: According to the diffusion equation (1), the dynamic adsorption data points of the sample in the low-pressure region are taken, and q is used as the time constant. t / q e right Plot the graph, obtain the slope k through linear fitting, and calculate the diffusion time constant (D / r) of the adsorbate in the sample according to formula (2). 2 )(like Figure 4 b).

[0086]

[0087]

[0088] In the formula, qt Let q be the amount of CO2 adsorbed by the sample at time t (mg / g). e denoted as the adsorption amount at adsorption equilibrium (mg / g), D is the diffusion coefficient of the adsorbate in the sample, and r is the radius of the equivalent sphere.

[0089] b. Calculation of thermodynamic adsorption enthalpy: Integrate the peak value of the final DSC curve to obtain the integration area S (J / g), and calculate the adsorption enthalpy ΔH according to formula (3). ads (like Figure 4 a).

[0090]

[0091] Here, q e,m The adsorption amount at adsorption equilibrium is expressed as mmol / g.

[0092] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for simultaneous analysis of the kinetics and thermodynamics of an adsorption process, characterized in that, Specifically, the following steps are included: Step 1: In-situ activation treatment of the adsorbent; Step 2: Simultaneous testing of the dynamic adsorption process and thermal change signal of the adsorbent; Step 3: Simultaneous kinetic and thermodynamic analysis; Step 1 specifically includes: placing the adsorbent in a crucible, placing the crucible at the left end of the sample holder of the synchronous thermal analyzer (1), and placing an empty crucible at the right end of the sample holder as a reference crucible; closing the exhaust valve (9) of the synchronous thermal analyzer; opening the pumping valve (10) of the synchronous thermal analyzer; setting the heating program on the synchronous thermal analyzer; turning on the vacuum pump (4) to start the activation of the adsorbent; until the weight of the adsorbent reaches equilibrium, the vacuum pump can be turned off to end the activation; closing the pumping valve (10); opening the protective gas passage and the second purge gas passage; backfilling the gas until atmospheric pressure is reached; and then opening the exhaust valve (9) of the synchronous thermal analyzer. Step 2 is specifically divided into two parts: sample testing and baseline testing. a. Sample testing: Set the protective gas flow rate and keep the flow rate constant; if the adsorbate to be tested is vapor, open the first purge gas passage and open the vent valve (11) first; if the adsorbate to be tested is non-vapor, open the second purge gas passage and set an appropriate purge gas flow rate; set an appropriate test temperature, and after the temperature is constant, click to start the test, and at the same time close the vent valve (11); use a computer (8) to record the mass change and heat change of the sample, and obtain the thermogravimetric curve and heat change curve of the sample respectively; b. Baseline test: Replace the crucible with the sample on the left side of the sample holder of the synchronous thermal analyzer (1) with an empty crucible. The steps for testing the baseline are the same as those for testing the sample. c. Subtract the baseline from the sample test curve to obtain the final thermogravimetric curve and thermal change curve; Step 3 specifically includes: (1) Calculation of kinetic diffusion time constant: According to the diffusion equation formula (1), the dynamic adsorption data points of the sample in the low-pressure region are taken, and q is used as the time constant. t ⁄q e right Plot the graph, obtain the slope k through linear fitting, and calculate the diffusion time constant (D / r) of the adsorbate in the sample according to formula (2). 2 ); (1) = (2) In the formula, q t Let q be the amount of adsorbate adsorbed by the sample at time t. e denoted as the adsorption amount at adsorption equilibrium, D is the diffusion coefficient of the adsorbate in the sample, and r is the radius of the equivalent sphere. (2) Calculation of thermodynamic adsorption enthalpy: Integrate the peak value of the final thermal change curve to obtain the integral area S (J / g), and calculate the adsorption enthalpy value according to formula (3). ; = (3) Here, q e,m This represents the amount of adsorption at adsorption equilibrium.

2. A device for simultaneous analysis of adsorption process kinetics and thermodynamics, characterized in that... The method for simultaneous analysis of the kinetics and thermodynamics of an adsorption process as described in claim 1 includes a simultaneous thermal analyzer (1), a steam generator (2), a constant temperature circulating water bath (3), a vacuum pump (4), a mass flow meter (5-7), and a computer (8); the simultaneous thermal analyzer (1) is connected to the steam generator (2), the constant temperature circulating water bath (3), the vacuum pump (4), the mass flow meter (5-7), and the computer (8); The synchronous thermal analyzer synchronously tests the thermogravimetric and thermal changes of the adsorbent, and the thermal changes specifically include differential scanning calorimetry or differential thermal change; the steam generator (2) has a self-heating function and pipeline insulation function, and the temperature control range is 20 ~ 80 ℃. The solvent in the steam generator (2) can be added or replaced as needed; the temperature range of the constant temperature circulating water bath is 20 ~ 100 ℃; the ultimate vacuum degree of the vacuum pump is not less than 0.01 mbar.

3. The device for simultaneous analysis of adsorption process kinetics and thermodynamics according to claim 2, characterized in that, The adsorbents include metal-organic frameworks (MOFs), polymers, carbon nanomaterials, silica, and molecular sieves.

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