Electrolytic cell device and method for coupling carbon capture fluid regeneration with co2 utilization

Abstract

The present application relates to the technical field of CO2 capture and utilization, and particularly relates to an electrolytic cell device and method coupling carbon capture liquid regeneration and CO2 utilization. The device comprises an electrolytic cell cathode chamber, an electrolytic cell anode chamber, a carbon dioxide desorption chamber and a power supply. The method steps are as follows: step one: adding carbon capture absorption liquid after absorbing carbon dioxide into the carbon dioxide desorption chamber, adding electrolyte I into the electrolytic cell cathode chamber, and adding electrolyte II into the electrolytic cell anode chamber; step two: introducing carbon dioxide into the electrolytic cell cathode chamber; step three: connecting the power supply, and performing carbon capture absorption liquid electrolysis treatment and carbon dioxide electrochemical reduction. The present application couples carbon capture absorption liquid electrochemical regeneration technology and carbon dioxide electrochemical reduction technology, has the advantages of low energy consumption and less secondary pollution, and can simultaneously realize low-cost regeneration of carbon capture absorption liquid and green and efficient utilization of carbon dioxide.

Description

Technical fields:

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

[0002] Chinese patent CN 113117506A 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 electrochemical regeneration of carbon capture and absorption liquids with the electrochemical reduction of carbon dioxide to simultaneously achieve carbon capture and utilization of carbon dioxide using an electrochemical method. Summary of the Invention:

[0007] The technical problem to be solved by the present invention is to provide an electrolytic cell device and method that couples carbon capture liquid regeneration and CO2 utilization. The device and method couple the electrochemical regeneration technology of carbon capture absorbent and the electrochemical reduction technology of carbon dioxide, which has the advantages of low energy consumption and less secondary pollution, and can simultaneously realize low-cost regeneration of carbon capture absorbent and green and efficient utilization of carbon dioxide.

[0008] The technical solution adopted in this invention is: an electrolytic cell device that couples carbon capture solution regeneration and CO2 utilization, comprising an electrolytic cell cathode chamber, an electrolytic cell anode chamber, a carbon dioxide desorption chamber, and a power supply;

[0009] The cathode chamber of the electrolytic cell is equipped with a bipolar membrane, which is separated by the bipolar membrane to form a carbon capture and absorption liquid regeneration chamber.

[0010] A cation exchange membrane is provided between two adjacent chambers in the cathode chamber, anode chamber, and carbon dioxide desorption chamber of the electrolytic cell.

[0011] The power source is connected to the cathode electrode in the cathode chamber of the electrolytic cell and the anode electrode in the anode chamber of the electrolytic cell.

[0012] An electrolytic cell method for coupling carbon capture solution regeneration and CO2 utilization, applicable to an electrolytic cell device coupling carbon capture solution regeneration and CO2 utilization, comprises the following steps:

[0013] Step 1: Add the carbon capture and absorption liquid after absorbing carbon dioxide to the carbon dioxide desorption chamber, add electrolyte I to the cathode chamber of the electrolytic cell, and add electrolyte II to the anode chamber of the electrolytic cell;

[0014] Step 2: Introduce carbon dioxide into the cathode chamber of the electrolytic cell;

[0015] Step 3: Connect the power supply to perform electrolytic treatment of the carbon capture and absorption liquid and electrochemical reduction of carbon dioxide.

[0016] Furthermore, the carbon capture and absorption solution in step one is one or more alkaline aqueous solutions.

[0017] Furthermore, the carbon capture and absorption solution in step one is one or both of KOH aqueous solution and NaOH aqueous solution.

[0018] Furthermore, the electrolyte I in step one is a carbon capture and absorption liquid that has not absorbed carbon dioxide.

[0019] Furthermore, in step one, the electrolyte II contains only carbon capture and absorbent cations and / or H+ cations. + Electrolyte II anions are not easily reduced and do not react with H+. + A chemical reaction occurs.

[0020] Furthermore, the carbon capture and absorption solution is an aqueous solution of KOH, and electrolyte II is an aqueous solution of K2SO4.

[0021] Furthermore, the electrolysis conditions in step three are: electrolysis temperature of 10℃-90℃ and electrolysis voltage of 1V-50V.

[0022] Furthermore, the order of steps two and three can be changed or performed simultaneously.

[0023] Furthermore, in step three, oxygen and H2 are generated at the anode of the electrolytic cell. + OH- is generated at the cathode of the electrolytic cell. - .

[0024] Furthermore, in step three, H is generated by electrolysis. + H + CO3 in carbon capture and absorption liquid 2- or HCO3 - This enables the desorption of carbon dioxide.

[0025] Furthermore, in step three, OH is generated by electrolysis. - OH - It combines with cations in the carbon capture and absorption liquid to regenerate the carbon capture and absorption liquid.

[0026] Furthermore, the carbon dioxide in step two can be directly derived from the desorbed carbon dioxide in step three, or from other carbon dioxide sources.

[0027] 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.

[0028] The beneficial effects of this invention are: this invention couples the electrochemical regeneration technology of carbon capture and absorption liquid and the electrochemical reduction technology of carbon dioxide on the same electrolytic cell device, thereby realizing the regeneration of carbon capture and absorption liquid and the reduction and utilization of carbon dioxide; it has the advantages of low energy consumption, low cost of carbon capture and absorption liquid regeneration, less secondary pollution, and green and efficient utilization of carbon dioxide, which is conducive to actual industrial production and application. Attached image description:

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 A schematic diagram of an electrolytic cell device for coupling carbon capture solution regeneration and CO2 utilization.

[0031] Figure 2 This is a schematic diagram of an electrolytic cell device that couples carbon capture solution regeneration and CO2 utilization, with the carbon dioxide desorption chamber located between the cathode chamber and the anode chamber of the electrolytic cell.

[0032] Figure 3 This is a schematic diagram of an electrolytic cell device that uses a bipolar membrane to divide the cathode chamber of an electrolytic cell into left and right chambers, coupling carbon capture solution regeneration and CO2 utilization. Detailed implementation method:

[0033] 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.

[0034] It should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "setting," "injection," "access," "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 in this application based on the specific circumstances.

[0035] The electrolytic cell apparatus and method for coupled carbon capture solution regeneration and CO2 utilization provided by this invention are applicable to the regeneration of absorbent in carbon capture solution and the reduction 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 to CO.

[0036] This invention utilizes electrochemical principles to electrolytically regenerate the absorbent while simultaneously reducing and utilizing carbon dioxide. Oxygen is generated in the anode chamber of the electrolytic cell, carbon dioxide is electrochemically reduced in the cathode chamber, and carbon dioxide is generated in the carbon dioxide desorption chamber.

[0037] The present invention does not limit the electrode materials of the cathode chamber and anode chamber of the electrolytic cell. The specific materials can be selected according to the actual situation. For example, they can be transition metal oxides and their compounds, metal alloys, or carbon-based composite materials.

[0038] 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.

[0039] Example 1

[0040] like Figure 1 As shown, the electrolytic cell apparatus for coupling carbon capture solution regeneration and CO2 utilization in this embodiment includes:

[0041] Power source 7 is used to provide electrical energy for electrolysis.

[0042] The cathode chamber 1 of the electrolytic cell contains a cathode electrode and electrolyte I. In the cathode chamber 1, carbon dioxide is reduced, producing OH-. - OH - The carbon capture and absorbent is regenerated by combining with cations in the carbon capture and absorbent solution. Electrolyte I is a 60 wt% KOH aqueous solution, and the carbon dioxide originates from carbon dioxide desorption chamber 3.

[0043] The anode chamber 2 of the electrolytic cell contains the anode electrode and electrolyte II. O2 and H2 are generated in the anode chamber 2 of the electrolytic cell. + Electrolyte II is a 60 wt% aqueous solution of K2SO4.

[0044] Carbon dioxide desorption chamber 3 contains a carbon capture and absorption liquid after carbon dioxide absorption. The CO3 in the carbon capture and absorption liquid of carbon dioxide desorption chamber 3... 2- or HCO3 - H generated in the anode chamber 2 of the electrolytic cell +The reaction achieves carbon dioxide desorption. The carbon capture and absorption solution is a 60wt% KOH aqueous solution, which absorbs carbon dioxide and is then injected into the carbon dioxide desorption chamber 3.

[0045] The cation exchange membrane 4 is located between two adjacent chambers in the electrolytic cell cathode chamber 1, the electrolytic cell anode chamber 2, and the carbon dioxide desorption chamber 3.

[0046] The bipolar membrane 5 is located above the cathode chamber 1 of the electrolytic cell. The cathode chamber 1 above the bipolar membrane 5 forms the carbon capture and absorption liquid regeneration chamber 6. The bipolar membrane 5 prevents carbon dioxide from contacting and reacting with the regenerated carbon capture and absorption liquid.

[0047] The electrolytic cell method for coupling carbon capture solution regeneration and CO2 utilization in this embodiment is carried out in the above-mentioned electrolytic cell apparatus, such as... Figure 1 As shown, it includes:

[0048] Step 1: After saturating the 60wt% KOH aqueous solution with carbon dioxide, inject it into the carbon dioxide desorption chamber 3 of the electrolytic cell; inject the 60wt% KOH aqueous solution into the cathode chamber 1 of the electrolytic cell; and inject the 60wt% K2SO4 aqueous solution into the anode chamber 2 of the electrolytic cell.

[0049] Step 2: Introduce carbon dioxide into the cathode chamber 1 of the electrolytic cell, wherein the carbon dioxide originates from the carbon dioxide desorption chamber 3 of the electrolytic cell;

[0050] Step 3: Control the electrolysis temperature to 50℃ and the electrolysis voltage to 2V, and carry out electrolysis treatment. Pure oxygen is collected in the anode chamber 2 of the electrolysis cell, and pure carbon dioxide is collected in the carbon dioxide desorption chamber 3 of the electrolysis cell. In the cathode chamber 1 of the electrolysis cell, carbon dioxide is electrochemically reduced to obtain CO product with a purity of more than 60%. The carbon capture and absorption liquid is regenerated in the carbon capture and absorption liquid regeneration chamber 6.

[0051] Example 2

[0052] like Figure 2 As shown, the electrolytic cell apparatus for coupling carbon capture solution regeneration and CO2 utilization in this embodiment includes:

[0053] Power source 7 is used to provide electrical energy for electrolysis.

[0054] The cathode chamber 1 of the electrolytic cell contains a cathode electrode and electrolyte I. In the cathode chamber 1, carbon dioxide is reduced, producing OH-. - OH - The carbon capture and absorption liquid is regenerated by combining with cations in the liquid. Electrolyte I is a 50 wt% KOH aqueous solution, and the carbon dioxide originates from carbon dioxide desorption chamber 3.

[0055] The anode chamber 2 of the electrolytic cell contains the anode electrode and electrolyte II. O2 and H2 are generated in the anode chamber 2 of the electrolytic cell. +Electrolyte II is a 50 wt% KNO3 aqueous solution.

[0056] Carbon dioxide desorption chamber 3 contains a carbon capture and absorption liquid after carbon dioxide absorption. The CO3 in the carbon capture and absorption liquid of carbon dioxide desorption chamber 3... 2- or HCO3 - H generated in the anode chamber 2 of the electrolytic cell + The reaction achieves carbon dioxide desorption. The carbon capture and absorption solution is a 50 wt% KOH aqueous solution, which absorbs carbon dioxide and is then injected into the carbon dioxide desorption chamber 3.

[0057] The cation exchange membrane 4 is located between two adjacent chambers in the electrolytic cell cathode chamber 1, the electrolytic cell anode chamber 2, and the carbon dioxide desorption chamber 3.

[0058] The bipolar membrane 5 is located above the cathode chamber 1 of the electrolytic cell. The cathode chamber 1 above the bipolar membrane 5 forms the carbon capture and absorption liquid regeneration chamber 6. The bipolar membrane 5 prevents carbon dioxide from contacting and reacting with the regenerated carbon capture and absorption liquid.

[0059] The electrolytic cell method for coupling carbon capture solution regeneration and CO2 utilization in this embodiment is carried out in the above-mentioned electrolytic cell apparatus, such as... Figure 2 As shown, it includes:

[0060] Step 1: After saturating the 50wt% KOH aqueous solution with carbon dioxide, inject it into the carbon dioxide desorption chamber 3 of the electrolytic cell; inject the 50wt% KOH aqueous solution into the cathode chamber 1 of the electrolytic cell; and inject the 50wt% KNO3 aqueous solution into the anode chamber 2 of the electrolytic cell.

[0061] Step 2: Introduce carbon dioxide into the cathode chamber 1 of the electrolytic cell, wherein the carbon dioxide originates from the carbon dioxide desorption chamber 3 of the electrolytic cell;

[0062] Step 3: Control the electrolysis temperature to 70℃ and the electrolysis voltage to 3V, and carry out electrolysis treatment. Pure oxygen is collected in the anode chamber 2 of the electrolysis cell, and pure carbon dioxide is collected in the carbon dioxide desorption chamber 3 of the electrolysis cell. In the cathode chamber 1 of the electrolysis cell, carbon dioxide is electrochemically reduced to obtain CO product with a purity of more than 60%. The carbon capture and absorption liquid is regenerated in the carbon capture and absorption liquid regeneration chamber 6.

[0063] Example 3

[0064] like Figure 1 As shown, the electrolytic cell apparatus for coupling carbon capture solution regeneration and CO2 utilization in this embodiment includes:

[0065] Power source 7 is used to provide electrical energy for electrolysis.

[0066] The cathode chamber 1 of the electrolytic cell contains a cathode electrode and electrolyte I. In the cathode chamber 1, carbon dioxide is reduced, producing OH-. - OH- The carbon capture and absorption liquid is regenerated by combining with cations in the liquid. Electrolyte I is a 50 wt% NaOH aqueous solution, and the carbon dioxide originates from carbon dioxide desorption chamber 3.

[0067] The anode chamber 2 of the electrolytic cell contains the anode electrode and electrolyte II. O2 and H2 are generated in the anode chamber 2 of the electrolytic cell. + Electrolyte II is a 50 wt% NaNO3 aqueous solution.

[0068] Carbon dioxide desorption chamber 3 contains a carbon capture and absorption liquid after carbon dioxide absorption. The CO3 in the carbon capture and absorption liquid of carbon dioxide desorption chamber 3... 2- or HCO3 - H generated in the anode chamber 2 of the electrolytic cell + The reaction achieves carbon dioxide desorption. The carbon capture and absorption solution is a 50wt% NaOH aqueous solution, which absorbs carbon dioxide and is then injected into the carbon dioxide desorption chamber 3.

[0069] The cation exchange membrane 4 is located between two adjacent chambers in the electrolytic cell cathode chamber 1, the electrolytic cell anode chamber 2, and the carbon dioxide desorption chamber 3.

[0070] The bipolar membrane 5 is located above the cathode chamber 1 of the electrolytic cell. The cathode chamber 1 above the bipolar membrane 5 forms the carbon capture and absorption liquid regeneration chamber 6. The bipolar membrane 5 prevents carbon dioxide from contacting and reacting with the regenerated carbon capture and absorption liquid.

[0071] The electrolytic cell method for coupling carbon capture solution regeneration and CO2 utilization in this embodiment is carried out in the above-mentioned electrolytic cell apparatus, such as... Figure 1 As shown, it includes:

[0072] Step 1: After saturating the 50wt% NaOH aqueous solution with carbon dioxide, inject it into the carbon dioxide desorption chamber 3 of the electrolytic cell; inject the 50wt% NaOH aqueous solution into the cathode chamber 1 of the electrolytic cell; and inject the 50wt% NaNO3 aqueous solution into the anode chamber 2 of the electrolytic cell.

[0073] Step 2: Introduce carbon dioxide into the cathode chamber 1 of the electrolytic cell, wherein the carbon dioxide originates from the carbon dioxide desorption chamber 3 of the electrolytic cell;

[0074] Step 3: Control the electrolysis temperature to 50℃ and the electrolysis voltage to 2V, and carry out electrolysis treatment. Pure oxygen is collected in the anode chamber 2 of the electrolysis cell, and pure carbon dioxide is collected in the carbon dioxide desorption chamber 3 of the electrolysis cell. In the cathode chamber 1 of the electrolysis cell, carbon dioxide is electrochemically reduced to obtain CO product with a purity of more than 60%. The carbon capture and absorption liquid is regenerated in the carbon capture and absorption liquid regeneration chamber 6.

[0075] Example 4

[0076] like Figure 2As shown, the electrolytic cell apparatus for coupling carbon capture solution regeneration and CO2 utilization in this embodiment includes:

[0077] Power source 7 is used to provide electrical energy for electrolysis.

[0078] The cathode chamber 1 of the electrolytic cell contains a cathode electrode and electrolyte I. In the cathode chamber 1, carbon dioxide is reduced, producing OH-. - OH - The carbon capture and absorption liquid is regenerated by combining with cations in the liquid. Electrolyte I is a 60 wt% NaOH aqueous solution, and the carbon dioxide originates from carbon dioxide desorption chamber 3.

[0079] The anode chamber 2 of the electrolytic cell contains the anode electrode and electrolyte II. O2 and H2 are generated in the anode chamber 2 of the electrolytic cell. + Electrolyte II is a 60 wt% Na2SO4 aqueous solution.

[0080] Carbon dioxide desorption chamber 3 contains a carbon capture and absorption liquid after carbon dioxide absorption. The CO3 in the carbon capture and absorption liquid of carbon dioxide desorption chamber 3... 2- or HCO3 - H generated in the anode chamber 2 of the electrolytic cell + The reaction achieves carbon dioxide desorption. The carbon capture and absorption solution is a 60wt% NaOH aqueous solution, which absorbs carbon dioxide and is then injected into the carbon dioxide desorption chamber 3.

[0081] The cation exchange membrane 4 is located between two adjacent chambers in the electrolytic cell cathode chamber 1, the electrolytic cell anode chamber 2, and the carbon dioxide desorption chamber 3.

[0082] The bipolar membrane 5 is located above the cathode chamber 1 of the electrolytic cell. The cathode chamber 1 above the bipolar membrane 5 forms the carbon capture and absorption liquid regeneration chamber 6. The bipolar membrane 5 prevents carbon dioxide from contacting and reacting with the regenerated carbon capture and absorption liquid.

[0083] The electrolytic cell method for coupling carbon capture solution regeneration and CO2 utilization in this embodiment is carried out in the above-mentioned electrolytic cell apparatus, such as... Figure 2 As shown, it includes:

[0084] Step 1: After saturating the 60wt% NaOH aqueous solution with carbon dioxide, inject it into the carbon dioxide desorption chamber 3 of the electrolytic cell; inject the 60wt% NaOH aqueous solution into the cathode chamber 1 of the electrolytic cell; and inject the 60wt% Na2SO4 aqueous solution into the anode chamber 2 of the electrolytic cell.

[0085] Step 2: Introduce carbon dioxide into the cathode chamber 1 of the electrolytic cell, wherein the carbon dioxide originates from the carbon dioxide desorption chamber 3 of the electrolytic cell;

[0086] Step 3: Control the electrolysis temperature to 70℃ and the electrolysis voltage to 3V, and carry out electrolysis treatment. Pure oxygen is collected in the anode chamber 2 of the electrolysis cell, and pure carbon dioxide is collected in the carbon dioxide desorption chamber 3 of the electrolysis cell. In the cathode chamber 1 of the electrolysis cell, carbon dioxide is electrochemically reduced to obtain CO product with a purity of more than 60%. The carbon capture and absorption liquid is regenerated in the carbon capture and absorption liquid regeneration chamber 6.

[0087] 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 electrolytic cell device coupling carbon capture solution regeneration and CO2 utilization, characterized in that: It includes an electrolytic cell cathode chamber (1), an electrolytic cell anode chamber (2), a carbon dioxide desorption chamber (3), and a power source (7); The cathode chamber (1) of the electrolytic cell is provided with a bipolar membrane (5) and is separated by the bipolar membrane (5) to form a carbon capture and absorption liquid regeneration chamber (6); A cation exchange membrane (4) is provided between two adjacent chambers in the cathode chamber (1), anode chamber (2), and carbon dioxide desorption chamber (3) of the electrolytic cell; The power source (7) is connected to the cathode electrode in the cathode chamber (1) of the electrolytic cell and the anode electrode in the anode chamber (2) of the electrolytic cell.

2. An electrolytic cell method for coupling carbon capture solution regeneration and CO2 utilization, used in the electrolytic cell apparatus for coupling carbon capture solution regeneration and CO2 utilization as described in claim 1, characterized in that: The steps of this method are as follows: Step 1: Add carbon capture and absorption liquid after absorbing carbon dioxide to carbon dioxide desorption chamber (3), add electrolyte I to cathode chamber (1) of electrolytic cell, and add electrolyte II to anode chamber (2) of electrolytic cell; Step 2: Introduce carbon dioxide into the cathode chamber (1) of the electrolytic cell; Step 3: Connect the power supply to perform electrolytic treatment of the carbon capture and absorption liquid and electrochemical reduction of carbon dioxide.

3. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, characterized in that: The carbon capture and absorption solution in step one is one or more alkaline aqueous solutions.

4. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 3, characterized in that: The carbon capture and absorption solution in step one is one or both of KOH aqueous solution and NaOH aqueous solution.

5. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, characterized in that: The electrolyte I in step one is a carbon capture and absorption liquid that has not absorbed carbon dioxide.

6. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, characterized in that: The electrolyte II in step one contains only carbon capture and absorbent cations and / or H cations. + Electrolyte II anions are not easily reduced and do not react with H+. + A chemical reaction occurs.

7. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 6, characterized in that: The carbon capture and absorption solution is an aqueous solution of KOH, and electrolyte II is an aqueous solution of K2SO4.

8. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, characterized in that: The electrolysis conditions in step three are: electrolysis temperature of 10℃-90℃ and electrolysis voltage of 1V-50V.

9. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, characterized in that: The order of steps two and three can be changed or performed simultaneously.

10. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, characterized in that: In step three, oxygen and H2 are generated at the anode of the electrolytic cell. + OH- is generated at the cathode of the electrolytic cell. - .

11. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, characterized in that: In step three, H is generated by electrolysis. + H + CO3 in carbon capture and absorption liquid 2- or HCO 3- This enables the desorption of carbon dioxide.

12. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, characterized in that: In step three, OH is generated by electrolysis. - OH - It combines with cations in the carbon capture and absorption liquid to regenerate the carbon capture and absorption liquid.

13. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, characterized in that: The carbon dioxide in step two can be directly derived from the desorbed carbon dioxide in step three, or from other carbon dioxide sources.

14. The electrolytic cell method for coupled carbon capture solution regeneration and CO2 utilization according to claim 2, 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.

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