Electrochemical method and system for coupling carbon capture fluid regeneration with co2 separation utilization

Abstract

The present application relates to the technical field of CO2 capture and utilization, in particular to an electrochemical method and system coupling carbon capture liquid regeneration and CO2 separation and utilization. The method steps are as follows: step one: ion membrane electrolysis treatment is carried out on the carbon capture absorption liquid after absorbing carbon dioxide; step two: the mixed gas generated in step one is introduced into the cathode of a fuel cell, and hydrogen is introduced into the anode of the fuel cell; step three: the carbon dioxide obtained by purification in step two is introduced into the cathode of electrolytic cell II, and the electric energy generated by the fuel cell in step two is used for electrolysis treatment of electrolytic cell II, electrochemical reduction is carried out on the purified carbon dioxide, and the reduced product is obtained. The present application couples three electrochemical devices, realizes the regeneration of carbon capture absorption liquid, the separation of carbon dioxide / oxygen mixed gas and the reduction of carbon dioxide in turn, has the advantages of low energy consumption and less secondary pollution, and can realize the capture, separation and green and effective utilization of carbon dioxide at the same time.

Description

Technical fields:

[0001] This invention relates to the field of CO2 capture and utilization technology, and in particular to an electrochemical method and system that couples carbon capture solution regeneration with CO2 separation and utilization. Background technology:

[0002] Chinese Patent CN 113117506 A discloses an electrolytic device and method for capturing carbon dioxide from industrial waste gas or air. The electrolytic device includes a power source, an anode chamber, a cathode chamber, and a gas absorption chamber. The method includes the following steps: 1) The anode electrolyte is electrolyzed to provide O2 and H2. + 2) The cathode electrolyte is electrolyzed to provide H2 and OH-. - 3) Contains OH - The cathode electrolyte absorbs carbon dioxide from industrial waste gas or air to provide a solution containing free carbonate ions and / or free bicarbonate ions; 4) The solution containing free carbonate ions and / or free bicarbonate ions is passed into a solution containing H+. + The reaction occurs in the anolyte to provide carbon dioxide. This invention simultaneously achieves CO2 capture and CO2 absorbent generation in the same electrolysis device, completely avoiding the generation or use of water-insoluble metal carbonate precipitates, and generating high-purity CO2, H2, and O2 separately in different chambers of the electrolysis device.

[0003] Chinese patent CN110773198B relates to a carbon dioxide electrochemical reduction catalyst and its preparation method. The catalyst has a high specific surface area with a special morphology and structure, thereby providing more catalytic active sites. The catalyst preparation method uses spray drying to spray dry a nickel precursor solution and a graphene oxide dispersion, followed by mixing with sulfur powder and calcining in a tube furnace under an argon atmosphere. By effectively controlling the catalyst preparation conditions, the contact specific surface area between carbon dioxide and the catalyst is greatly increased, while the hydrogen evolution reaction accompanying the carbon dioxide reduction process is effectively suppressed, thereby improving the utilization and conversion rate of CO2 and increasing the Faraday efficiency.

[0004] Chinese patent CN112251766B relates to a method for preparing carbon monoxide by electrochemical reduction of carbon dioxide, comprising: using an H-type dual electrochemical cell reactor, with a proton exchange membrane separating the cathode chamber and the anode chamber; introducing carbon dioxide gas into the cathode chamber before the reaction; employing a three-electrode system, with a gas diffusion electrode as the working electrode, a platinum electrode as the auxiliary electrode, and a silver / silver chloride electrode as the reference electrode; the gas diffusion electrode includes a gas diffusion electrode body and a carbon dioxide electrochemical reduction catalyst supported on the gas diffusion electrode body; the carbon dioxide electrochemical reduction catalyst is a gold-based bimetallic catalyst supported on multi-walled carbon nanotubes. This method can improve the Faraday efficiency of the product carbon monoxide.

[0005] Chinese patent CN115995575B discloses a fuel cell system and thermoelectric decoupling method based on the combined use of carbon capture and thermal storage. This invention utilizes a hydrocarbon-fueled solid oxide fuel cell to capture CO2 via adsorption. CO2 adsorption and adsorbent regeneration are exothermic and endothermic processes, respectively. The adsorbent's volumetric energy density is comparable to that of thermal storage materials. The CO2 adsorption / regeneration process of carbon capture can simultaneously serve as thermal storage. The thermoelectric decoupling of the system is achieved through decoupling during the adsorption (exothermic) / regeneration (thermal storage) time. Depending on changes in thermoelectric load, the adsorption and regeneration processes do not occur simultaneously: when the system's heat generation exceeds the heat load, the waste heat can be used to drive the regeneration process; conversely, the regeneration process's endothermic effect is reduced, and the adsorption's exothermic effect meets the heat load shortfall. This invention achieves both carbon capture and thermal storage functions through a single carbon adsorption / regeneration device, reducing the need for dedicated thermal storage equipment and realizing flexible decoupling and control of system heating and power supply.

[0006] The existing patents mentioned above all involve the electrochemical regeneration of carbon capture and absorption liquids and the electrochemical reduction and utilization of carbon dioxide. However, there are no patent reports on how to couple the three technologies of electrochemical regeneration of carbon capture and absorption liquids, electrochemical purification of carbon dioxide, and electrochemical reduction of carbon dioxide to achieve carbon capture and separation utilization. Summary of the Invention:

[0007] The technical problem to be solved by the present invention is to provide an electrochemical method and system for coupling carbon capture liquid regeneration and CO2 separation and utilization. The method couples three electrochemical devices to sequentially realize the regeneration of carbon capture absorbent, the separation of carbon dioxide / oxygen mixture, and the reduction of carbon dioxide. It has the advantages of low energy consumption and less secondary pollution, and can simultaneously realize the capture and separation of carbon dioxide and its green and effective utilization.

[0008] The technical solution adopted in this invention is: an electrochemical method coupling carbon capture solution regeneration and CO2 separation and utilization, the steps of which are as follows:

[0009] Step 1: The carbon capture and absorption liquid after absorbing carbon dioxide is subjected to ion membrane electrolysis. Hydrogen gas is obtained at the cathode of electrolysis cell I, and a mixture of carbon dioxide and oxygen gas is obtained at the anode of electrolysis cell I, thus regenerating the carbon capture and absorption liquid.

[0010] Step 2: The mixed gas produced by electrolysis in Step 1 is passed into the cathode of the fuel cell, and hydrogen is passed into the anode of the fuel cell; while the fuel cell generates electricity, purified carbon dioxide is obtained at the cathode of the fuel cell.

[0011] Step 3: The carbon dioxide purified in Step 2 is passed into the cathode of electrolytic cell II. The electrical energy generated by the fuel cell in Step 2 is used to electrolyze the purified carbon dioxide in electrolytic cell II to obtain the reduced product.

[0012] Furthermore, the carbon capture and absorption solution in step one is an alkaline aqueous solution.

[0013] Furthermore, the carbon capture and absorption liquid in step one includes at least one of alkaline inorganic substances and nitrogen-containing organic substances; the nitrogen-containing organic substances include at least one of amino acid salts and organic alcohol amines.

[0014] Furthermore, the electrolysis conditions in step one are: electrolysis temperature of 10℃-90℃ and electrolysis voltage of 1V-50V.

[0015] Furthermore, the fuel cell in step two is a hydrogen-oxygen fuel cell.

[0016] Furthermore, the fuel cell electrolyte in step two is an acidic electrolyte solution or an alkaline electrolyte solution.

[0017] Furthermore, the electrolysis conditions in step three are: electrolysis temperature of 10℃-90℃ and electrolysis voltage of 1V-50V.

[0018] Furthermore, the electrochemical reduction product in step three is one or more of carbon monoxide (syngas), carbon monoxide, methanol, formic acid, methane, ethylene, and n-propanol.

[0019] An electrochemical system coupling carbon capture liquid regeneration and CO2 separation and utilization, the system includes an electrolytic cell I, a fuel cell, an electrolytic cell II, and a voltage regulating device;

[0020] The electrolytic cell I includes an anode chamber and a cathode chamber, with a cation exchange membrane provided between the anode chamber and the cathode chamber.

[0021] The fuel cell includes a fuel cell cathode chamber and a fuel cell anode chamber;

[0022] The electrolytic cell II includes an anode chamber and a cathode chamber.

[0023] The gas generated in the anode chamber of electrolytic cell I can be introduced into the cathode chamber of the fuel cell, and the gas generated in the cathode chamber of electrolytic cell I can be introduced into the anode chamber of the fuel cell; the electrical energy generated by the fuel cell is used to power electrolytic cell II after the voltage is regulated by a voltage regulator, and the gas generated by the fuel cell can be introduced into the cathode chamber of electrolytic cell II.

[0024] Furthermore, the fuel cell is a proton exchange membrane hydrogen-oxygen fuel cell.

[0025] The beneficial effects of this invention are: this invention couples three electrochemical devices to sequentially realize the regeneration of carbon capture and absorption liquid, the separation of carbon dioxide / oxygen mixture, and the reduction of carbon dioxide. It has the advantages of low energy consumption and less secondary pollution, and can simultaneously realize the capture and separation of carbon dioxide and its green and effective utilization. Attached image description:

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] Figure 1 A schematic diagram of the structure of an electrochemical system for coupling carbon capture solution regeneration and CO2 separation and utilization. Detailed implementation method:

[0028] The specific embodiments listed below are merely descriptions of the principles and features of this application. The examples given are only for explaining this application and are not intended to limit the scope of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0029] It should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "setting," "injection," "access," and "connection," etc., should be interpreted broadly. For example, connection can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms within the context of the application.

[0030] The electrochemical method for coupling carbon capture liquid regeneration and CO2 separation and utilization provided by this invention is applicable to the regeneration of absorbent in carbon capture solution and the separation and utilization of carbon dioxide, such as the regeneration of CO2 after absorption by alkaline KOH aqueous solution, and the utilization of CO2 electrochemically converted into CO.

[0031] The electrolytic cell I1 and electrolytic cell II3 of the present invention each include at least an electrolytic cell, a cathode chamber, and an anode chamber. The cathode chamber and the anode chamber are both located inside the electrolytic cell. The present invention does not limit the electrode materials of the cathode and anode of the electrolytic cell I1 and electrolytic cell II3. They can be selected according to the actual situation. For example, they can be transition metal oxides and their compounds, metal alloy materials, or carbon-based composite materials.

[0032] The fuel cell 2 of the present invention includes at least a battery tank, a cathode chamber (positive electrode chamber), and an anode chamber (negative electrode chamber). The cathode chamber and the anode chamber are both disposed in the battery tank. The present invention does not limit the electrode materials of the battery cathode and anode, and can be selected according to the actual situation. For example, they can be transition metal oxides and their compounds, metal alloy materials, or carbon-based composite materials.

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Example 1

[0035] As attached Figure 1 As shown, the electrochemical system for coupling carbon capture solution regeneration and CO2 separation and utilization in this embodiment includes:

[0036] Electrolytic cell I1 is used for the electrolytic treatment of the carbon capture and absorption liquid after carbon dioxide absorption. O2 and H2 are generated at the anode of electrolytic cell I1. + H + CO3 in carbon capture and absorption liquid 2- or HCO3 - The reaction produces CO2. Hydrogen and OH- are generated at the cathode of electrolytic cell I1. - The cations and OH in the carbon capture and absorption solution - The process combines to achieve regeneration. A cation exchange membrane 1-3 is installed between the anode chamber 1-1 and the cathode chamber 1-2 of electrolytic cell I. The carbon capture and absorption solution is a 60wt% KOH aqueous solution, which absorbs carbon dioxide and is then injected into electrolytic cell I.

[0037] Fuel cell 2 is used to purify CO2 in a CO2 / O2 mixture and generate electricity. Fuel cell 2 is a proton exchange membrane hydrogen-oxygen fuel cell. At the anode (negative electrode), hydrogen is oxidized to H2O. + In the CO2 / O2 mixture at the cathode (positive electrode) of the battery, the O2 is oxidized, and the CO2 is purified. Specifically, the anode gas from electrolytic cell I1 is fed into the cathode (positive electrode) of fuel cell 2, and the cathode gas from electrolytic cell I1 is fed into the anode (negative electrode) of fuel cell 2.

[0038] Electrolytic cell II3 utilizes the electrical energy generated by fuel cell 2 to electrochemically reduce and utilize CO2. Before current is introduced into electrolytic cell II3, the electrolysis voltage is regulated by a transformer. Purified CO2 gas is introduced into the cathode of electrolytic cell II3. The cathode (positive electrode) of fuel cell 2 is connected to the anode of electrolytic cell II3, and the anode (negative electrode) of fuel cell 2 is connected to the cathode of electrolytic cell II3.

[0039] The power source provides DC power to the cathode and anode of electrolytic cell I1.

[0040] The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization in this embodiment is carried out in the above-mentioned electrochemical system, as shown in the attached figure. Figure 1As shown, it includes:

[0041] Step 1: After saturating the 60wt% KOH aqueous solution with carbon dioxide, the solution was injected into electrolytic cell I1. The electrolysis temperature was controlled at 50℃ and the electrolysis voltage at 2V. Electrolysis was performed, and a mixture of carbon dioxide and oxygen was collected at the anode region of electrolytic cell I1, while pure hydrogen was collected at the cathode region. Analysis showed that the molar content of carbon dioxide in the mixed gas was 66.7%.

[0042] Step 2: The cathode gas and anode gas generated in Step 1 are introduced into the anode (negative electrode) and cathode (positive electrode) of fuel cell 2, respectively. While generating current, carbon dioxide is purified (>99%) at the cathode of fuel cell 2.

[0043] Step 3: Pass the current generated in Step 2 into electrolytic cell II3, control the electrolysis temperature at 50℃ and the electrolysis voltage at 2V, and electrochemically reduce the purified carbon dioxide to obtain CO product with a purity of over 60%.

[0044] Example 2

[0045] As attached Figure 1 As shown, the electrochemical system for coupling carbon capture solution regeneration and CO2 separation and utilization in this embodiment includes:

[0046] Electrolytic cell I1 is used for the electrolytic treatment of the carbon capture and absorption liquid after carbon dioxide absorption. O2 and H2 are generated at the anode of electrolytic cell I1. + H + CO3 in carbon capture and absorption liquid 2- or HCO3 - The reaction produces CO2. Hydrogen and OH- are generated at the cathode of electrolytic cell I1. - The cations and OH in the carbon capture and absorption solution - The process combines to achieve regeneration. A cation exchange membrane 1-3 is installed between the anode chamber 1-1 and the cathode chamber 1-2 of electrolytic cell I. The carbon capture and absorption solution is a 30wt% aqueous solution of ethanolamine, which absorbs carbon dioxide and is then injected into electrolytic cell I.

[0047] Fuel cell 2 is used for purifying CO2 in a CO2 / O2 mixture and generating electricity. Fuel cell 2 is a proton exchange membrane hydrogen-oxygen fuel cell. At the anode (negative electrode), hydrogen is oxidized to H2O. + In the CO2 / O2 mixture at the cathode (positive electrode) of the battery, the O2 is oxidized, and the CO2 is purified. Specifically, the anode gas from electrolytic cell I1 is fed into the cathode (positive electrode) of fuel cell 2, and the cathode gas from electrolytic cell I1 is fed into the anode (negative electrode) of fuel cell 2.

[0048] Electrolytic cell II3 utilizes the current generated by fuel cell 2 to electrochemically reduce and utilize CO2. Before the current is introduced into electrolytic cell II3, the electrolysis voltage is regulated by a transformer. Purified CO2 gas is introduced into the cathode of electrolytic cell II3. The cathode (positive electrode) of fuel cell 2 is connected to the anode of electrolytic cell II3, and the anode (negative electrode) of fuel cell 2 is connected to the cathode of electrolytic cell II3.

[0049] The power source provides DC power to the cathode and anode of electrolytic cell I1.

[0050] The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization in this embodiment is carried out in the above-mentioned electrochemical system, as shown in the attached figure. Figure 1 As shown, it includes:

[0051] Step 1: After saturating a 30wt% aqueous solution of ethanolamine with carbon dioxide, the solution is injected into electrolytic cell I1. The electrolysis temperature is controlled at 60℃ and the electrolysis voltage at 5V. Electrolysis is performed, and a mixture of carbon dioxide and oxygen is collected at the anode region of electrolytic cell I1, while pure hydrogen is collected at the cathode region. Analysis shows that the molar content of carbon dioxide in the mixture is 50%.

[0052] Step 2: The cathode gas and anode gas generated in Step 1 are introduced into the anode (negative electrode) and cathode (positive electrode) of fuel cell 2, respectively. While generating current, carbon dioxide is purified (>99%) at the cathode of fuel cell 2.

[0053] Step 3: Pass the current generated in Step 2 into electrolytic cell II3, control the electrolysis temperature at 60℃ and the electrolysis voltage at 5V, and electrochemically reduce the purified carbon dioxide to obtain CO product with a purity of over 60%.

[0054] Example 3

[0055] As attached Figure 1 As shown, the electrochemical system for coupling carbon capture solution regeneration and CO2 separation and utilization in this embodiment includes:

[0056] Electrolytic cell I1 is used for the electrolytic treatment of the carbon capture and absorption liquid after carbon dioxide absorption. O2 and H2 are generated at the anode of electrolytic cell I1. + H + CO3 in carbon capture and absorption liquid 2- or HCO3 - The reaction produces CO2. Hydrogen and OH- are generated at the cathode of electrolytic cell I1. - The cations and OH in the carbon capture and absorption solution - The process combines to achieve regeneration. A cation exchange membrane 1-3 is installed between the anode chamber 1-1 and the cathode chamber 1-2 of electrolytic cell I. The carbon capture and absorption solution is a 10wt% potassium glycinate aqueous solution, which absorbs carbon dioxide and is then injected into electrolytic cell I.

[0057] Fuel cell 2 is used for purifying CO2 in a CO2 / O2 mixture and generating electricity. Fuel cell 2 is a proton exchange membrane hydrogen-oxygen fuel cell. At the anode (negative electrode), hydrogen is oxidized to H2O. + In the CO2 / O2 mixture at the cathode (positive electrode) of the battery, the O2 is oxidized, and the CO2 is purified. Specifically, the anode gas from electrolytic cell I1 is fed into the cathode (positive electrode) of fuel cell 2, and the cathode gas from electrolytic cell I1 is fed into the anode (negative electrode) of fuel cell 2.

[0058] Electrolytic cell II3 utilizes the current generated by fuel cell 2 to electrochemically reduce and utilize CO2. Before the current is introduced into electrolytic cell II3, the electrolysis voltage is regulated by a transformer. Purified CO2 gas is introduced into the cathode of electrolytic cell II3. The cathode (positive electrode) of fuel cell 2 is connected to the anode of electrolytic cell II3, and the anode (negative electrode) of fuel cell 2 is connected to the cathode of electrolytic cell II3.

[0059] The power source provides DC power to the cathode and anode of electrolytic cell I1.

[0060] The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization in this embodiment is carried out in the above-mentioned electrochemical system, as shown in the attached figure. Figure 1 As shown, it includes:

[0061] Step 1: After saturating the 10wt% potassium glycinate aqueous solution with carbon dioxide, the solution was injected into electrolytic cell I1. The electrolysis temperature was controlled at 80℃ and the electrolysis voltage at 3V. Electrolysis was performed, and a mixture of carbon dioxide and oxygen was collected at the anode region of electrolytic cell I1, while pure hydrogen was collected at the cathode region. Analysis showed that the molar content of carbon dioxide in the mixed gas was 66.7%.

[0062] Step 2: The cathode gas and anode gas generated in Step 1 are introduced into the anode (negative electrode) and cathode (positive electrode) of fuel cell 2, respectively. While generating current, carbon dioxide is purified (>99%) at the cathode of fuel cell 2.

[0063] Step 3: Pass the current generated in Step 2 into electrolytic cell II3, control the electrolysis temperature at 20℃ and the electrolysis voltage at 3V, and electrochemically reduce the purified carbon dioxide to obtain CO product with a purity of over 60%.

[0064] The preferred embodiments and experimental verifications of this application have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this application without inventive effort. Therefore, any technical solutions that can be obtained by those skilled in the art based on the concept of this application through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An electrochemical method coupling carbon capture solution regeneration and CO2 separation and utilization, characterized in that: The steps of this method are as follows: Step 1: The carbon capture and absorption liquid after absorbing carbon dioxide is subjected to ion membrane electrolysis treatment. Hydrogen gas is obtained at the cathode of electrolytic cell I (1), and a mixture of carbon dioxide and oxygen gas is obtained at the anode of electrolytic cell I (1). The carbon capture and absorption liquid is regenerated. Step 2: The mixed gas generated by electrolysis in Step 1 is introduced into the cathode of the fuel cell (2), and hydrogen is introduced into the anode of the fuel cell (2); while the fuel cell (2) generates electrical energy, purified carbon dioxide is obtained at the cathode of the fuel cell (2). Step 3: The carbon dioxide purified in Step 2 is passed into the cathode of electrolytic cell II (3). The electrical energy generated by the fuel cell (2) in Step 2 is used for electrolysis in electrolytic cell II (3) to electrochemically reduce the purified carbon dioxide and obtain the reduced product.

2. The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization according to claim 1, characterized in that: The carbon capture and absorption solution in step one is an alkaline aqueous solution.

3. The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization according to claim 1, characterized in that: The carbon capture and absorption liquid in step one includes at least one of alkaline inorganic substances and nitrogen-containing organic substances; the nitrogen-containing organic substances include at least one of amino acid salts and organic alcohol amines.

4. The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization according to claim 1, characterized in that: The electrolysis conditions in step one are: electrolysis temperature of 10℃-90℃ and electrolysis voltage of 1V-50V.

5. The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization according to claim 1, characterized in that: The fuel cell (2) in step two is a hydrogen-oxygen fuel cell.

6. The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization according to claim 1, characterized in that: The electrolyte in the fuel cell (2) in step two is an acidic electrolyte solution or an alkaline electrolyte solution.

7. The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization according to claim 1, characterized in that: The electrolysis conditions in step three are: electrolysis temperature of 10℃-90℃ and electrolysis voltage of 1V-50V.

8. The electrochemical method for coupling carbon capture solution regeneration and CO2 separation and utilization according to claim 1, characterized in that: The electrochemical reduction product in step three is one or more of the following: carbon monoxide (syngas), carbon monoxide, methanol, formic acid, methane, ethylene, and n-propanol.

9. An electrochemical system coupling carbon capture solution regeneration and CO2 separation and utilization, applied to the electrochemical method coupling carbon capture solution regeneration and CO2 separation and utilization as described in any one of claims 1-7, characterized in that: The system includes an electrolytic cell I (1), a fuel cell (2), an electrolytic cell II (3), and a voltage regulator; The electrolytic cell I (1) includes an anode chamber (1-1) and a cathode chamber (1-2), and a cation exchange membrane (1-3) is provided between the anode chamber (1-1) and the cathode chamber (1-2); The fuel cell (2) includes a fuel cell cathode chamber (2-1) and a fuel cell anode chamber (2-2); The electrolytic cell II (3) includes an anode chamber (3-1) and a cathode chamber (3-2). The gas generated in the anode chamber (1-1) of the electrolytic cell I can be introduced into the cathode chamber (2-1) of the fuel cell, and the gas generated in the cathode chamber (1-2) of the electrolytic cell I can be introduced into the anode chamber (2-2) of the fuel cell; the electrical energy generated by the fuel cell (2) is used to power the electrolytic cell II (3) after the voltage is regulated by the voltage regulating device, and the gas generated by the fuel cell (2) can be introduced into the cathode chamber (3-2) of the electrolytic cell II.

10. The electrochemical system for coupled carbon capture solution regeneration and CO2 separation and utilization according to claim 9, characterized in that: The fuel cell (2) is a proton exchange membrane hydrogen-oxygen fuel cell.

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