Gas adsorption capacitor device and gas adsorption detection equipment

Abstract

The utility model relates to the technical field of gas separation equipment, particularly provides a gas adsorption capacitor device and gas adsorption detection equipment, and aims to solve the problems that the operability, repeatability and adsorption effect of the conventional gas adsorption capacitor need to be improved. For this purpose, the body adsorption capacitor device of the utility model comprises: a power supply capable of charging the gas adsorption capacitor device; an adsorption cavity is formed in the shell, and a gas inlet and a gas outlet which are communicated with the adsorption cavity are formed in the shell, so that mixed gas containing target gas can enter the adsorption cavity through the gas inlet and flow out of the adsorption cavity through the gas outlet; the positive plate is arranged in the adsorption cavity and is electrically connected with the negative electrode of the power supply; the negative plate is arranged in the adsorption cavity and is electrically connected with the positive electrode of the power supply; the diaphragm is arranged between the positive plate and the negative plate, so that the positive plate and the negative plate are kept insulated; and the electrolyte is positioned in the adsorption cavity. The operation convenience, the repeatability and the adsorption effect of the device are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas separation equipment technical field, specifically provide a kind of gas adsorption capacitor device and gas adsorption detection equipment. BACKGROUND

[0002] Over the past 50 years, atmospheric carbon dioxide continues to rise, of which 80% comes from the combustion of fossil fuels. This has led to global warming, which has had a significant negative impact on human activities.

[0003] Currently, in order to reduce the amount of carbon dioxide emissions, a variety of gas separation techniques have been applied in practice, which can separate and decompose carbon dioxide from different mixed gases, such as amine washing, pressure swing adsorption (PSA), temperature swing adsorption (TSA), membrane separation technology, and the newly discovered electrochemical-driven carbon dioxide capture method. This method achieves the purpose of carbon dioxide adsorption and desorption by charging and discharging the supercapacitor electrode.

[0004] However, the existing gas adsorption capacitor has the problems of poor adsorption effect, easy operation and poor repeatability.

[0005] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0006] The utility model aims to solve the above technical problems, i.e. the existing gas adsorption capacitor has the problems of poor adsorption effect, easy operation and poor repeatability.

[0007] In a first aspect, the utility model provides a gas adsorption capacitor device, which comprises: a power supply capable of charging the gas adsorption capacitor device; a housing having an adsorption cavity inside; an air inlet and an air outlet are provided on the housing and communicate with the adsorption cavity, so that the mixed gas containing the target gas can enter the adsorption cavity through the air inlet and flow out of the adsorption cavity from the air outlet; a positive electrode sheet is provided in the adsorption cavity and is electrically connected to the negative electrode of the power supply; a negative electrode sheet is provided in the adsorption cavity and is electrically connected to the positive electrode of the power supply; a diaphragm is provided between the positive electrode sheet and the negative electrode sheet to keep the positive electrode sheet and the negative electrode sheet insulated; and an electrolyte is located in the adsorption cavity to wet the positive electrode sheet, the negative electrode sheet and the diaphragm.

[0008] In the preferred technical scheme of the adsorption capacitor device, the shell comprises an upper shell and a lower shell, the upper shell is detachably connected with the lower shell and jointly encloses the adsorption cavity, the gas inlet and the gas outlet are arranged on the upper shell, and the negative electrode sheet is arranged above the positive electrode sheet.

[0009] In the preferred technical scheme of the adsorption capacitor device, upper tabs are arranged on the upper shell, two ends of each of the upper tabs are electrically connected with the negative electrode sheet and the positive electrode of the power supply respectively, lower tabs are arranged on the lower shell, two ends of each of the lower tabs are electrically connected with the positive electrode sheet and the negative electrode of the power supply respectively.

[0010] In the preferred technical scheme of the adsorption capacitor device, the gas adsorption capacitor device further comprises a mesh gasket, and the mesh gasket is arranged above the negative electrode sheet.

[0011] In the preferred technical scheme of the adsorption capacitor device, the mesh gasket is made of stainless steel.

[0012] In the preferred technical scheme of the adsorption capacitor device, the gas adsorption capacitor device further comprises an annular elastic sheet, and the annular elastic sheet abuts between the mesh gasket and the upper shell.

[0013] In the preferred technical scheme of the adsorption capacitor device, the active material of the positive electrode sheet and the negative electrode sheet is porous carbon, the current collector is graphite paper, and / or the diaphragm is filter paper.

[0014] In the preferred technical scheme of the adsorption capacitor device, the inner diameter of the shell is not greater than 2.5 cm, the diameter of the positive electrode sheet and the negative electrode sheet is not greater than 1.6 cm, and / or the diameter of the diaphragm is not greater than 2.2 cm.

[0015] In the second aspect, the utility model provides a gas adsorption detection equipment, the gas adsorption detection equipment includes cold trap device, in situ electrochemical mass spectrometer, reaction gas bottle, carrier gas bottle and above -mentioned gas adsorption capacitor device and power, the carrier gas bottle with the reaction gas bottle's gas outlet end all with the gas inlet communication, the gas outlet with the cold trap device's gas inlet communication, the cold trap device's gas outlet with in situ electrochemical mass spectrometer communication.

[0016] In the preferred technical scheme of the gas adsorption detection equipment, the gas adsorption detection equipment further comprises a sample injection control device, the gas inlet end of the sample injection control device is in communication with the gas outlet ends of the reaction gas bottle and the carrier gas bottle, the gas outlet end of the sample injection control device is in communication with the gas inlet, and the sample injection control device can control the flow rate and flow of the reaction gas bottle and the carrier gas bottle.

[0017] In the case of adopting the technical scheme, the gas adsorption capacitor device comprises: a power supply, the power supply can charge the gas adsorption capacitor device; a shell, the inside of the shell has an adsorption cavity, the shell is provided with an air inlet and an air outlet which are communicated with the adsorption cavity, so that the mixed gas containing the target gas can enter the adsorption cavity through the air inlet and flow out of the adsorption cavity from the air outlet; a positive plate, the positive plate is arranged in the adsorption cavity and is electrically connected with the negative pole of the power supply; a negative plate, the negative plate is arranged in the adsorption cavity and is electrically connected with the positive pole of the power supply; a diaphragm, the diaphragm is arranged between the positive plate and the negative plate to keep the positive plate and the negative plate insulated; and an electrolyte, the electrolyte is located in the adsorption cavity to wet the positive plate, the negative plate and the diaphragm. By forming the adsorption cavity containing the electrode in the inside of the shell, the diffusion of the mixed gas is facilitated during the mixed gas flow passes through the adsorption cavity, so that the contact and reaction of the mixed gas with the electrode are more sufficient, and the adsorption performance of the electrode to the target gas is improved.

[0018] Further, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are detachably connected and jointly enclose the adsorption cavity, the air inlet and the air outlet are arranged on the upper shell, and the negative plate is arranged above the positive plate. Through such arrangement, the shell can be quickly opened and closed, so that the internal electrode, diaphragm and electrolyte can be replaced; meanwhile, the pressing force of the upper and lower shells after each buckling is relatively constant, the distance between the positive plate and the negative plate is relatively fixed, the repeatability of the adsorption test is ensured, and the contact of the mixed gas with the negative plate is more sufficient, which is beneficial to the adsorption and separation of the target gas.

[0019] Further, the upper shell is provided with an upper tab, the two ends of the upper tab are electrically connected with the negative plate and the positive pole of the power supply respectively, the lower shell is provided with a lower tab, and the two ends of the lower tab are electrically connected with the positive plate and the negative pole of the power supply respectively. Through such arrangement, the connection of the positive plate and the negative plate with the power supply is facilitated.

[0020] Further, the gas adsorption capacitor device further comprises a grid gasket, and the grid gasket is arranged above the negative plate. Through such arrangement, the mixed gas can be fully diffused during the mixed gas flow passes through the grid gasket, the contact of the mixed gas with the negative plate is more uniform, and the adsorption of the target gas by the negative plate is facilitated.

[0021] Further, the grid gasket is made of stainless steel. Through such arrangement, the rigidity is improved, the grid gasket can be prevented from being deformed to cause the mesh to be blocked during use, and the passability of the mixed gas is ensured.

[0022] Further, the gas adsorption capacitor device further comprises a ring-shaped elastic sheet abutting between the grid gasket and the upper shell. Through the arrangement, on the one hand, the ring-shaped elastic sheet has good conductivity, ensuring the current transmission between the negative plate, the upper shell and the tab; on the other hand, the grid gasket, the positive and negative plates and the diaphragm can be pressed tightly, preventing displacement of the components and ensuring close contact of the components, thereby improving the stability of the adsorption capacitor device.

[0023] Further, the active material of the positive plate and the negative plate is porous carbon, and the current collector is graphite paper; and / or the diaphragm is filter paper. Through the arrangement, the graphite current collector has lower cost and better corrosion resistance than the metal current collector.

[0024] Further, the inner diameter of the shell is not greater than 2.5 cm, and / or the diameter of the positive plate and the negative plate is not greater than 1.6 cm, and / or the diameter of the diaphragm is not greater than 2.2 cm. Through the arrangement, the area of the plate is smaller, so that the active material can be fully reacted with the mixed gas in time.

[0025] In addition, the gas adsorption detection equipment further comprises a cold trap device, an in-situ electrochemical mass spectrometer, a reaction gas bottle, a carrier gas bottle and the above-mentioned gas adsorption capacitor device and power supply, the gas outlet ends of the carrier gas bottle and the reaction gas bottle are communicated with the gas inlet, the gas outlet is communicated with the gas inlet end of the cold trap device, and the gas outlet end of the cold trap device is communicated with the in-situ electrochemical mass spectrometer. Since the above-mentioned gas adsorption capacitor device is adopted, the technical effects of the above-mentioned gas adsorption capacitor device are further possessed. Compared with the gas adsorption detection equipment before improvement, the gas adsorption detection equipment of the utility model improves the repeatability, operability and accuracy of experimental data by combining the gas adsorption capacitor device with the in-situ electrochemical mass spectrometer, reduces the thickness and area of the plate, helps to reduce polarization, makes the mixed gas repeatedly contact with the plate, and improves the electrochemical performance and adsorption performance of the equipment.

[0026] Further, the gas adsorption detection equipment further comprises a sample injection control device, the gas inlet end of the sample injection control device is communicated with the gas outlet ends of the reaction gas bottle and the carrier gas bottle, the gas outlet end of the sample injection control device is communicated with the gas inlet, and the sample injection control device can control the flow rate and flow of the reaction gas bottle and the carrier gas bottle. Through the arrangement, the proportion of the mixed gas and the carrier gas can be accurately controlled, and then the mixed gas sample or the sample gas after gasification is transported to the mass spectrometer at a certain flow rate, so that the mixed gas sample is more easily introduced into the mass spectrometer. BRIEF DESCRIPTION OF DRAWINGS

[0027] The preferred embodiments of the utility model are described below in combination with the drawings, and the drawings show:

[0028] Figure 1 is an explosion view of the gas adsorption capacitor device of the utility model.

[0029] List of reference signs:

[0030] 1, upper shell; 11, air inlet; 12, air outlet; 13, upper lug; 2, lower shell; 21, lower lug; 3, positive plate; 4, negative plate; 5, diaphragm; 6, grid gasket; 7, gasket; 8, annular spring. DETAILED DESCRIPTION

[0031] The preferred embodiments of the utility model are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0032] It should be noted that in the description of the utility model, the terms "inner", "upper", "lower" and the like indicating the direction or positional relationship of the terms are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0033] In addition, it should also be noted that in the description of the utility model, unless otherwise specified and limited, the terms "set", "mount", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] Based on the problems of the existing gas adsorption capacitor pointed out in the background art that the operability, repeatability and adsorption effect need to be improved. The utility model provides a kind of gas adsorption capacitor device and gas adsorption detection equipment, by setting positive plate, negative plate, diaphragm and electrolyte etc. In the adsorption cavity surrounded by upper and lower shell, mixed gas sample is guided into and guided out by air inlet and air outlet set on shell, while the area of plate is reduced, realizing the full contact of mixed gas and negative plate, reaching the effect of improving adsorption performance, in addition, the stable pressing force of upper and lower shell also ensures the stability of gas adsorption capacitor adsorption performance.

[0035] Specifically, as Figure 1As shown, the gas adsorption capacitor device of the utility model includes: power supply, power supply can charge the gas adsorption capacitor device;Housing, the inside of housing has adsorption cavity, housing is provided with air inlet 11 and air outlet 12 with adsorption cavity communication, to enable the mixed gas containing target gas to pass through air inlet 11 and enter adsorption cavity, and from air outlet 12 flow out adsorption cavity;Positive sheet 3, positive sheet 3 is arranged in adsorption cavity, and is electrically connected with the negative pole of power supply;Negative sheet 4, negative sheet 4 is arranged in adsorption cavity, and is electrically connected with the positive pole of power supply;Diaphragm 5, diaphragm 5 is arranged between positive sheet 3 and negative sheet 4, to make positive sheet 3 and negative sheet 4 keep insulation;Electrolyte, electrolyte is located in adsorption cavity, to wet positive sheet 3, negative sheet 4 and diaphragm 5.

[0036] The application utilizes supercapacitor voltage adsorption technology, an electrochemical driving carbon dioxide capture method based on the principle of electric double-layer capacitor, realizes the adsorption and desorption of target gas by charging and discharging the electrode of supercapacitor, and research shows that the adsorption technology has certain adsorption capacity for various gases, and the adsorption effect on carbon dioxide is particularly obvious.In order to further improve the adsorption performance of carbon dioxide, the gas adsorption capacitor device provided by the application makes a plurality of optimizations and improvements on the basis of the existing supercapacitor adsorption device, and the adsorption effect of the device can be verified by constructing a gas adsorption detection equipment.

[0037] Exemplarily, as Figure 1 As shown, the gas adsorption capacitor device of the utility model adopts the shell structure similar to button cell, the inner diameter of the shell is preferably 25mm, including upper shell 1 and lower shell 2, the adsorption cavity is formed in the inside by buckling the upper shell 1 and the lower shell 2, the annular spring 8, the grid gasket 6, the gasket 7, the negative sheet 4, the diaphragm 5 and the positive sheet 3 are stacked in the adsorption cavity in the order from top to bottom, and a certain amount of electrolyte is injected in the adsorption cavity.

[0038] The positive sheet 3 and the negative sheet 4 are respectively connected with the two levels of power supply to form a capacitor, the charging and discharging of the capacitor are realized by controlling the power supply, specifically, the upper shell 1 and the lower shell 2 are both metal materials, and the two are insulatedly connected, the upper shell 1 is provided with upper pole lug 13, and the lower shell 2 is provided with lower pole lug 21, and the negative sheet 4 is electrically connected with the upper shell 1 through the gasket 7, the grid gasket 6 and the annular spring 8, and the positive sheet 3 is electrically connected with the lower shell 2.

[0039] The inlet 11 connects to the reaction gas cylinder, which contains a mixed gas sample containing carbon dioxide. During the experiment, the mixed gas flows into the adsorption chamber through inlet 11 and comes into full contact with the negative electrode 4. During the capacitor's charging process, the negative electrode adsorbs carbon dioxide. The outlet 12 connects to an in-situ electrochemical mass spectrometer to introduce the adsorbed mixed gas into the spectrometer. The in-situ electrochemical mass spectrometer analyzes the gas components in the mixed gas, detects the remaining carbon dioxide content, and evaluates the adsorption effect of the gas adsorption capacitor device on carbon dioxide.

[0040] Preferably, such as Figure 1 As shown, threaded structures are provided at the connection between the upper shell 1 and the lower shell 2 to achieve threaded connection between the two. The threaded connection not only allows the upper shell 1 and the lower shell 2 to lock together and be quickly disassembled and assembled to replace components such as the electrode and the diaphragm 5, but also ensures that the clamping force between the upper and lower electrode plates is relatively constant after the upper shell 1 and the lower shell 2 are closed, thus ensuring the stability of the capacitive adsorption capacity, keeping the test results stable, and improving the repeatability of multiple adsorption experiments.

[0041] The manufacturing process and operating principle of the gas adsorption capacitor device are explained in detail below with reference to specific implementation methods:

[0042] Preferably, both the positive and negative electrode sheets 4 are porous carbon electrodes, and the active materials of activated carbon, conductive agent and binder are mixed in a mass ratio of 85:10:5. The specific preparation methods are divided into dry electrode and wet electrode.

[0043] In a preferred embodiment of this solution, the dry electrode preparation method specifically involves mixing YP50F, conductive carbon black, and PTFE binder in a mass ratio of 85:10:5 and ball milling the mixture. The resulting powder is then pulverized in an air jet mill to obtain fibrous electrode material powder. The fibrous powder is repeatedly rolled using a roller mill to form a carbon film with a thickness of 250 μm. Simultaneously, conductive adhesive is uniformly coated onto one surface of a 50 μm thick graphite paper. The paper is then dried at 60°C to obtain a conductive adhesive layer with a coating thickness of 10 μm. The carbon film and the graphite paper with the conductive adhesive layer are cut to appropriate sizes and hot-pressed at 0.65 MPa and 160°C to obtain positive and negative electrode sheets with a diameter of 16 mm.

[0044] The wet electrode preparation method involves mixing YP50F, conductive carbon black, and PVDF binder in a mass ratio of 85:10:5, adding N-methylpyrrolidone as a solvent, and preparing a slurry. The slurry is then coated onto graphite paper, dried, and rolled. These steps are repeated multiple times to obtain a compaction density of 10 mg / cm³. 3 The above ion transport layer.

[0045] Preferably, the electrode material loading is ensured to be 10 mg / cm 2 The thickness of the graphite paper current collector is 0.05 mm, and the mass ratio of the positive and negative active materials is 1:1.

[0046] It should be noted that in some other embodiments of the electrode, YP50F can also be replaced by XLS activated carbon, Srilanka activated carbon or Haycarb activated carbon.

[0047] After the preparation of the positive and negative electrode sheets 4, the assembly of the gas adsorption capacitor device is carried out, as shown in Figure 1 Specifically, the upper shell 1, the annular spring 8, the grid gasket 6, the gasket 7, the negative electrode sheet 4, the separator 5, the positive electrode sheet 3 and the lower shell 2 are sequentially installed from top to bottom, and the electrolyte is injected into the lower shell 2.

[0048] Preferably, the separator 5 is selected from filter paper with low flow rate, the electrolyte is a neutral aqueous electrolyte with a concentration of about 1M, and 90-120 μL is added dropwise; the inner diameter of the shell is 25 mm, the diameter of the electrode sheet is 16 mm, and the diameter of the separator 5 is 19-22 mm.

[0049] Then the closing pressure of the upper and lower shells 2 is adjusted to 10 kgF / cm 2 and fixed.

[0050] After the preparation of the gas adsorption capacitor device is completed, a gas adsorption detection device needs to be built, and a polytetrafluoroethylene capillary is used to connect the carrier gas bottle and the reaction gas bottle, the sample control device, the gas adsorption capacitor device, the cold trap device and the in-situ electrochemical mass spectrometer in sequence.

[0051] Specifically, the carrier gas bottle and the reaction gas bottle are connected to the sample control device through two capillary tubes, respectively, to control the inlet rate of the carrier gas and the reaction gas, and the two capillary tubes are connected to the sample control device through a three-way joint to form a capillary tube, which is connected to the gas inlet 11 of the gas adsorption capacitor device. The gas outlet 12 of the gas adsorption capacitor device is connected to the gas inlet end of the cold trap device through a capillary tube, and the gas outlet end of the cold trap device is connected to the in-situ electrochemical mass spectrometer.

[0052] The cooling material used in the cold trap device is dry ice instead of liquid nitrogen; to separate the electrolyte in the mixed gas and prevent the electrolyte from entering the in-situ electrochemical mass spectrometer with the mixed gas and damaging the equipment.

[0053] Preferably, the carrier gas is argon; the mixed gas is 15% carbon dioxide and 85% nitrogen, to simulate the composition of industrial emissions.

[0054] After the experiment starts, first, the adsorption capacitor device is ventilated for 5-8 hours, then the power supply (blue charge and discharge instrument) is used to charge the adsorption capacitor device at a current density of 0.05 A / g, the capacitor voltage changes in the range of 0 to-1V, then to 0V, the in-situ electrochemical mass spectrometer is used to observe the change of carbon dioxide concentration with voltage, the mixed gas inlet rate is adjusted to 0.2sccm by the sample control device, the carrier gas inlet rate is adjusted to 3sccm, and the amount of carbon dioxide adsorption and desorption in the charging and discharging process is calculated based on the reaction gas inlet rate, the carbon dioxide inlet concentration and the mass of the negative active material.

[0055] As shown in the following table, after using the gas adsorption capacitor device of the present application, the adsorption effect of carbon dioxide under several embodiments is obviously improved compared with the adsorption effect of the existing adsorption capacitor device.

[0056] Activated carbon Carbon dioxide adsorption (mmol / kg) Example 1 YP50F 207 Example 2 Huaxian activated carbon 275 Example 3 Srilanka Activated carbon ​ 183 Example 4 Haycarb Activated carbon ​ 207 Comparative Example 1 YP50F 33

[0057] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without deviating from the principles of the utility model, and the technical schemes after these changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A gas adsorption capacitor device, characterized in that, The gas adsorption capacitor device includes: A power source capable of charging the gas adsorption capacitor device; The housing has an adsorption chamber inside, and the housing is provided with an air inlet and an air outlet communicating with the adsorption chamber, so that a mixed gas containing the target gas can enter the adsorption chamber through the air inlet and flow out of the adsorption chamber from the air outlet; A positive electrode plate is disposed in the adsorption cavity and electrically connected to the negative electrode of the power supply. A negative electrode sheet is disposed in the adsorption cavity and electrically connected to the positive electrode of the power supply. A separator is disposed between the positive electrode and the negative electrode to keep the positive electrode and the negative electrode insulated from each other; An electrolyte is located within the adsorption cavity to wet the positive electrode, the negative electrode, and the separator. The gas adsorption capacitor device also includes a grid pad, which is disposed above the negative electrode plate.

2. The gas adsorption capacitor device according to claim 1, characterized in that, The housing includes an upper housing and a lower housing, the upper housing and the lower housing are detachably connected and together form the adsorption cavity, the air inlet and the air outlet are disposed on the upper housing, and the negative electrode is disposed above the positive electrode.

3. The gas adsorption capacitor device according to claim 2, characterized in that, The upper housing is provided with an upper electrode tab, the two ends of which are electrically connected to the negative electrode plate and the positive electrode of the power supply, respectively. The lower housing is provided with a lower electrode tab, the two ends of which are electrically connected to the positive electrode plate and the negative electrode of the power supply, respectively.

4. The gas adsorption capacitor device according to claim 1, characterized in that, The mesh pad is made of stainless steel.

5. The gas adsorption capacitor device according to claim 2, characterized in that, The gas adsorption capacitor device further includes an annular spring sheet, which abuts against the mesh pad and the upper housing.

6. The gas adsorption capacitor device according to claim 1, characterized in that, The active material of the positive electrode and the negative electrode is porous carbon, and the current collector of the positive electrode and the negative electrode is graphite paper; and / or the separator is filter paper.

7. The gas adsorption capacitor device according to claim 1, characterized in that, The inner diameter of the shell is no greater than 2.5 cm, and / or the diameters of the positive electrode and the negative electrode are no greater than 1.6 cm, and / or the diameter of the diaphragm is no greater than 2.2 cm.

8. A gas adsorption detection device, characterized in that, The gas adsorption detection device includes a cold trap device, an in-situ electrochemical mass spectrometer, a reaction gas cylinder, a carrier gas cylinder, and a gas adsorption capacitor device and a power supply as described in any one of claims 1 to 7. The gas outlets of the carrier gas cylinder and the reaction gas cylinder are both connected to the gas inlet. The gas outlet is connected to the gas inlet of the cold trap device, and the gas outlet of the cold trap device is connected to the in-situ electrochemical mass spectrometer.

9. The gas adsorption detection device according to claim 8, characterized in that, The gas adsorption detection device further includes a sample injection control device. The inlet of the sample injection control device is connected to the outlet of the reaction gas cylinder and the carrier gas cylinder, and the outlet of the sample injection control device is connected to the inlet. The sample injection control device can control the flow rate and flow volume of the reaction gas cylinder and the carrier gas cylinder.

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