Carbon dioxide capture device and carbon dioxide capture method

Abstract

To provide new carbon dioxide capture technologies. [Solution] The carbon dioxide recovery device comprises an electrolysis tank having an anode and a cathode and containing an electrolyte containing an absorbent material that has absorbed carbon dioxide, and a recovery means for recovering carbon dioxide generated at the anode by the electrolysis of the electrolyte.

Description

Technical Field

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[0001] The present invention relates to a carbon dioxide recovery apparatus and a carbon dioxide recovery method.

Background Art

[0002] Techniques for recovering carbon dioxide from gases such as air have been attracting attention. In Patent Document 1, a technique has been proposed in which air is supplied to an aqueous solution of a metal hydroxide salt to form a carbonate, and hydrochloric acid is supplied to this aqueous solution to recover carbon dioxide. In addition, there is also known a method in which carbon dioxide is absorbed by an absorbent such as an amine compound and then released by heating.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When recovering carbon dioxide, those that utilize a chemical reaction with a special chemical substance as in Patent Document 1 require facilities for securing and managing the chemical substance, and those that utilize heating require a high-temperature environment.

[0005] The present invention provides a new carbon dioxide recovery technique.

Means for Solving the Problems

[0006] According to the present invention, an electrolysis cell that includes an anode and a cathode and contains an electrolyte containing an absorbent that has absorbed carbon dioxide, and a recovery means for recovering the carbon dioxide generated at the anode by electrolysis of the electrolyte, are provided. A carbon dioxide recovery apparatus characterized by the above is provided.

Effects of the Invention

[0007] According to the present invention, a new carbon dioxide capture technology can be provided. [Brief explanation of the drawing]

[0008] [Figure 1] A schematic diagram of a carbon dioxide capture device according to one embodiment of the present invention. [Figure 2] A diagram showing an example of the production of an absorbent material that absorbs carbon dioxide. [Figure 3] (A) and (B) are figures showing experimental data. [Figure 4] (A) and (B) are figures showing experimental data. [Figure 5] (A) and (B) are schematic diagrams of a carbon dioxide capture device according to another embodiment. [Figure 6] (A) and (B) are schematic diagrams of a carbon dioxide capture device according to yet another embodiment. [Figure 7] A schematic diagram of a carbon dioxide recovery device according to yet another embodiment. [Figure 8] A schematic diagram of a carbon dioxide recovery device according to yet another embodiment. [Figure 9] A schematic diagram of a carbon dioxide recovery device according to yet another embodiment. [Figure 10] A schematic diagram of a carbon dioxide recovery device according to yet another embodiment. [Figure 11] A schematic diagram of a carbon dioxide recovery device according to yet another embodiment. [Modes for carrying out the invention]

[0009] The embodiments will be described in detail below with reference to the attached drawings. Note that the following embodiments do not limit the invention as defined in the claims, and not all combinations of features described in the embodiments are essential to the invention. Two or more of the features described in the embodiments may be combined in any way. Furthermore, identical or similar configurations will be given the same reference numeral, and redundant descriptions will be omitted.

[0010] <First Embodiment> Figure 1 is a schematic diagram of a carbon dioxide recovery device 1 (hereinafter simply referred to as recovery device 1) according to one embodiment of the present invention. Recovery device 1 comprises an electrolysis tank 2, an anode 3, a cathode 4, a power supply device 5, recovery units 6 and 7, and a supply device 8.

[0011] The electrolysis cell 2 is a container for holding the electrolyte solution 20 and is basically sealed except for the recovery sections 6 and 7. The electrolyte solution 20 is an aqueous solution containing an electrolyte. Specific examples of electrolytes include sodium sulfate and sodium nitrate. The electrolyte solution 20 may also be other liquids such as pure water. In this embodiment, the inside of the electrolysis cell 2 is divided into an anode chamber 21 and a cathode chamber 22 by a diaphragm 23. The diaphragm 23 is, for example, a membrane made of ion exchange resin, a specific example being a membrane made of Nafion (registered trademark). It is also possible to adopt a configuration in which the inside of the electrolysis cell 2 is not divided by a diaphragm 23.

[0012] An anode 3 is provided in the anode chamber 21. The anode 3 is a linear or axial conductive member extending in the depth direction of the electrolysis cell 2. Most of the anode 3 is immersed in the electrolyte 20. A cathode 4 is provided in the cathode chamber 22. The cathode 4 is a linear or axial conductive member extending in the depth direction of the electrolysis cell 2. Most of the cathode 4 is immersed in the electrolyte 20.

[0013] The power supply unit 5 includes a power supply circuit that applies a voltage between the anode 3 and the cathode 4. By applying a voltage between the anode 3 and the cathode 4, an electric current flows between the anode 3 and the cathode 4 through the electrolyte 20, causing an electrolysis reaction of the electrolyte.

[0014] The recovery unit 6 recovers the gas generated in the anode chamber 21. The recovery unit 6 of the present embodiment is a hollow member (duct member) communicating with the anode chamber 21. The gas generated in the anode chamber 21 is exhausted outside the apparatus through the recovery unit 6. The recovery unit 6 may be provided with a forced exhaust device such as a fan. The recovery unit 7 recovers the gas generated at the cathode 22. The recovery unit 7 of the present embodiment is a hollow member (duct member) communicating with the cathode chamber 22. The gas generated in the cathode chamber 22 is exhausted outside the apparatus through the recovery unit 7. The recovery unit 7 may be provided with a forced exhaust device such as a fan.

[0015] The electrolytic solution 20 contains an absorbent 9. The absorbent 9 is a solid powder that has absorbed carbon dioxide. It is dispersed in the electrolytic solution 20 in the anode chamber 21 and dissolves in the electrolytic solution 20 when it desorbs carbon dioxide. The absorbent 9 of the present embodiment is an amine compound, specifically carbamic acid. The absorbent 9 is introduced into the anode chamber 21 by a supply device 8. The supply device 8 includes a hopper-shaped storage portion 80 that stores the absorbent 9, and an input pipe 81 that communicates with the storage portion 80 and drops the absorbent 9 in the storage portion 80 into the electrolytic cell 2 (anode chamber 21) by gravity. The input pipe 81 is provided with an opening / closing device 82 that constitutes a shutter for opening and closing the input pipe 81. When the input pipe 81 is opened by the opening / closing device 82, the absorbent 9 in the storage portion 80 is supplied to the anode chamber 21. When the input pipe 81 is closed by the opening / closing device 82, the supply of the absorbent 9 to the anode chamber 21 is stopped.

[0016] An example of the generation of the absorbent 9 will be described. FIG. 2 is an explanatory diagram showing an example of the generation of the absorbent 9. The absorption tower 10 is a device that brings the absorption liquid, which is the liquid phase of the absorbent 9, into contact with the gas containing carbon dioxide, and absorbs the carbon dioxide contained in the gas into the absorption liquid. The absorption liquid is isophoronediamine (IPDA) in the case of the present embodiment.

[0017] The absorption tower 10 comprises a hollow tower body 11 extending in the vertical direction. A liquid storage section 11a for storing absorbent liquid is provided at the lower part of the tower body 11. A gas inlet 11b, which communicates with the interior of the tower body 11, is provided on the side of the tower body 11. The inlet 11 has the form of a duct, and gases containing carbon dioxide, such as outside air and exhaust gas, are introduced into the tower body 11 through the inlet 11b. A filter 11ba is provided in the inlet 11b to remove dust from the gas being introduced.

[0018] The tower body 11 is equipped with a spray section 12 consisting of multiple nozzles. The spray section 12 sprays the absorbent liquid supplied by the circulation pump 13 downwards. The circulation pump 13 supplies the absorbent liquid from the storage section 11a to the spray section 12. As the absorbent liquid is sprayed, the tower body 11 is filled with absorbent liquid mist. When the absorbent liquid mist comes into contact with gas, carbon dioxide in the gas is absorbed by the absorbent liquid. The mist drips into the storage section 11a, and absorbent liquid with a relatively high carbon dioxide concentration is stored in the storage section 11a.

[0019] An exhaust section 11d is provided at the top of the column 11 to discharge the gas inside the column 11. An electric fan 15 is connected to the exhaust section 11d. When the fan 15 is operated, negative pressure is created inside the column 11, and gas containing carbon dioxide is introduced into the column 11 via the inlet section 11b, as shown by the thick arrow in Figure 2. Carbon dioxide is absorbed by the absorbent liquid inside the column 11, and the gas with a reduced carbon dioxide content rises inside the column 11 and is discharged from the exhaust section 11d, as shown by the thick arrow.

[0020] The demister 14 is located above the spray section 12 within the tower body 11 and collects mist of the absorbent liquid contained in the gas rising within the tower body 11. The demister 14 is, for example, a mesh or porous material such as a wire mesh or a perforated plate.

[0021] When the absorption tower 10 is operated for a certain period of time, the absorbent liquid is recovered from the storage section 11a. A drainage section 11e is provided at the bottom of the storage section 11a. When the valve 16 is opened, the liquid or gel-like absorbent material 90, which has absorbed carbon dioxide, is discharged from the storage section 11a into the tank 17. By drying the absorbent material 90, a solid material 91 is obtained. By crushing the solid material 91, a powder-like absorbent material 9 can be obtained. Since the absorbent material 9 is in powder form, it is advantageous for storage, transport, and storage. The absorbent material 9 can be produced in a location other than where the recovery device 1 is installed, and the absorbent material 9 can be transported to the recovery device 1 as needed for use.

[0022] Returning to Figure 1, with the absorbent material 9 dispersed in the electrolyte 20 as shown in the figure, a voltage is applied between the anode 3 and cathode 4 by the power supply 5. Through electrolysis, the absorbent material 9 desorbs carbon dioxide, returning to the absorbent solution and dissolving in the electrolyte 20. Carbon dioxide and oxygen are generated at the anode 3, and hydrogen is generated at the cathode 4. A mixed gas of carbon dioxide and oxygen can be recovered from the recovery unit 6. In this way, carbon dioxide can be recovered from the absorbent material 9. The recovered carbon dioxide can be stored or supplied to a site of use (e.g., a greenhouse) depending on its intended use.

[0023] (Example of experiment) A carbon dioxide recovery experiment was conducted using recovery device 1. Platinum wires were used for the anode 3 and cathode 4. A membrane made of Nafion® was used for the diaphragm 23. 30 mL of 0.1 mol / L sodium sulfate aqueous solution was placed in the anode chamber 21 and the cathode chamber 22, respectively, as the electrolyte. 0.8 g of IPDA carbamic acid was dispersed in the anode chamber 21 as the absorbent material 9. An Ag / AgCl electrode was placed in the anode chamber 21 as a reference electrode.

[0024] Figures 3(A) and 3(B) show experimental data when a voltage of 2.0V was applied to anode 3 of the Ag / AgCl electrode. In this experiment, the current originating from the oxidation reaction was confirmed on anode 3. Figure 3(A) shows the change in the amount of current in anode 3 over time, and Figure 3(B) shows the change in the concentration of carbon dioxide in the gas recovered from anode chamber 21 over time. The gas released from anode chamber 21 was recovered by circulating argon or nitrogen gas and quantified using a carbon dioxide concentration meter.

[0025] After 20 hours of reaction, it was confirmed that all of the IPDA carbamic acid solid had dissolved. Before the reaction, the pH of the electrolyte was 6 on the anode chamber 21 side and 9 on the cathode chamber 22 side. After 15 hours of electrolysis, the pH changed to 6 on the anode chamber 21 side and 12 on the cathode chamber 22 side. Argon gas was flowed through the anode chamber 21 and cathode chamber 22 at 40 sccm, and an attempt was made to quantify the released carbon dioxide. A maximum of 1000 ppm of carbon dioxide was obtained, and the total amount of carbon dioxide released was about 1.6 mmol relative to the IPDA carbamic acid used (approximately 3.7 mmol).

[0026] Figures 4(A) and 4(B) show experimental data when a voltage of 1.5V was applied to anode 3 of the Ag / AgCl electrode. In this experiment as well, a current originating from the oxidation reaction was confirmed on anode 3. Figure 4(A) shows the change in the amount of current in anode 3 over time, and Figure 4(B) shows the change in the concentration of carbon dioxide in the gas recovered from anode chamber 21 over time.

[0027] After 15 hours of reaction, it was confirmed that all of the IPDA carbamic acid solid had dissolved. When nitrogen gas was circulated through the anode chamber 21 and cathode chamber 22 at 50 sccm and the amount of released carbon dioxide was attempted to be quantified, a maximum of 1600 ppm of carbon dioxide was obtained, and the total amount of released carbon dioxide was about 1.6 mmol relative to the IPDA carbamic acid used (approximately 3.7 mmol).

[0028] As described above, according to this embodiment, carbon dioxide can be recovered from the absorbent material 9 that has absorbed carbon dioxide by using electrolysis. Since it does not utilize chemical reactions with special chemical substances, there is no need for facilities to secure and manage chemical substances, and a high-temperature environment is not required. Therefore, carbon dioxide can be recovered simply and safely.

[0029] <Second Embodiment> In the first embodiment, in order to recover carbon dioxide generated on the anode 3 more efficiently and without leakage, the recovery unit 6 may have an enclosure surrounding the anode 3. It may also have a tank for storing the recovered gas. Figure 5(A) shows an example. The illustrated recovery unit 6A has a recovery pipe 60, which is a hollow member (duct member), and a tank 61. The lower end of the recovery pipe 60 has an enclosure 60a into which the anode 3 is inserted. This allows for more reliable recovery of carbon dioxide rising from the surface of the anode 3. The upper end of the recovery pipe 60 is connected to the tank 61, and the recovered carbon dioxide is stored in the tank 61 together with oxygen. By storing the carbon dioxide in the tank 61, the carbon dioxide can be used at a later date. The tank 61 may be detachable from the recovery pipe 60 while maintaining airtightness.

[0030] <Third Embodiment> To promote the dispersion of the absorbent 9 in the electrolyte 20, a mechanism for stirring the electrolyte 20 may be provided. Figure 5(B) shows an example. The illustrated recovery device 1 includes a stirring device 100. The stirring device 100 is configured to stir the electrolyte 20 in the anode chamber 21.

[0031] The stirring device 100 comprises a motor 101, which is a driving source, a disc-shaped magnet 102 rotated by the motor 101, and an impeller 103. The motor 101 and magnet 102 are located outside the anode chamber 21, while the impeller 103 is located inside the anode chamber 21. A magnet 103a is provided in the center of the impeller 103. A magnetic force acts between the magnet 102 and the magnet 103a via the bottom wall of the electrolysis tank 2, and when the magnet 102 rotates, the impeller 103 also rotates. This allows the electrolyte 20 in the anode chamber 21 to be stirred, promoting the dispersion of the absorbent material 9 and accelerating the electrolysis reaction of the electrolyte 20.

[0032] <Fourth Embodiment> Various types of electrodes can be used as anode 3 and cathode 4. Figures 6(A) and 6(B) show examples of other forms of anode 3 and cathode 4.

[0033] The anode 3A and cathode 4A in Figure 6(A) have a strip-like or plate-like shape extending in the depth direction of the electrolysis chamber 2 and have rectangular planar portions 30 and 40. Carbon dioxide can be efficiently generated from the flat planar portion 30.

[0034] The anode 3B and cathode 4B in Figure 6(B) have a hemispherical shell shape and include spherical portions 31 and 41. This allows for a larger surface area in a confined installation space and enables efficient carbon dioxide generation.

[0035] <Fifth Embodiment> The gas generated at anode 3 contains carbon dioxide and oxygen. A device for removing oxygen may be provided. Oxygen removal may be carried out by either chemical or physical means. Figure 7 shows an example. The illustrated recovery device 1 is equipped with an oxygen removal device 110.

[0036] The removal device 110 is a fuel cell device that generates electricity by chemically reacting oxygen recovered in recovery unit 6B (which replaces recovery unit 6) with hydrogen recovered in recovery unit 7. The removal device 110 comprises an anode 111, a cathode 112, and an electrolyte 113 between them. Recovery unit 7 supplies recovered hydrogen to the cathode 112. Recovery unit 6B comprises a pipe 62 that supplies recovered gas (oxygen and carbon dioxide) to the anode 111, and a pipe 63 that discharges carbon dioxide from which oxygen has been removed, along with water generated by power generation. Gas with a higher concentration of carbon dioxide can be obtained from pipe 63.

[0037] The electricity generated by the removal device 110 is supplied to the power supply device 5. This reduces the power consumption of the power supply device 5.

[0038] <Sixth Embodiment> As the electrolysis of the electrolyte 20 progresses, the pH of the electrolyte 20 in the anode chamber 21 and the cathode chamber 22 fluctuates. Changes in pH may reduce the electrolysis reaction. A conditioning tank may be provided for supplying the electrolyte 20 to the electrolysis cell 2 and recovering the electrolyte 20 from the electrolysis cell 2. Figure 8 shows an example. The illustrated recovery device 1 includes a conditioning tank 120.

[0039] The adjustment tank 120 is connected to the anode chamber 21 via valve 121 and also via pump 122. Similarly, the adjustment tank 120 is connected to the cathode chamber 22 via valve 123 and also via pump 124. Fresh electrolyte 20 may be stored in the adjustment tank 120.

[0040] The adjustment tank 120 is located at a lower position than the electrolysis tank 2. When valve 121 is opened, the electrolyte 20 flows from the anode chamber 21 into the adjustment tank 120 by gravity and is recovered. Similarly, when valve 123 is opened, the electrolyte 20 flows from the cathode chamber 22 into the adjustment tank 120 by gravity and is recovered. The electrolytes 20 from the anode chamber 21 and the cathode chamber 22 mix in the adjustment tank 120, thereby neutralizing their pH.

[0041] When pump 122 is driven, neutralized electrolyte 20 can be supplied from the adjustment tank 120 to the anode chamber 21. Similarly, when pump 124 is driven, neutralized electrolyte 20 can be supplied from the adjustment tank 120 to the cathode chamber 22.

[0042] In this way, the pH of the electrolyte 20 in the anode chamber 21 and the cathode chamber 22 can be maintained more constantly. The liquid volume of the electrolyte 20 in the anode chamber 21 and the cathode chamber 22 can also be adjusted. The pH and liquid volume of the electrolyte 20 may be maintained by automatic control. For example, the pH and liquid volume of the electrolyte 20 in the anode chamber 21 and the cathode chamber 22 may be detected by sensors, and valves 121 and 123 and pumps 122 and 124 may be driven according to the detection results.

[0043] <Seventh Embodiment> The adjustment tank 120 of the sixth embodiment may be provided separately in the anode chamber 21 and the cathode chamber 22. Figure 9 shows an example of this configuration.

[0044] The adjustment tank 120A is connected to the anode chamber 21 via a valve 121 and via a pump 122. A pH adjusting agent to neutralize the electrolyte 20 in the adjustment tank 120A can be supplied from tank 125A by driving pump 126A. In addition, fresh electrolyte 20 can be supplied to the adjustment tank 120A from tank 127A by driving pump 128A.

[0045] Similarly, the adjustment tank 120B communicates with the cathode chamber 22 via valve 123 and via pump 124. The adjustment tank 120B can be supplied with a pH adjusting agent from tank 125B to neutralize the electrolyte 20 in the adjustment tank 120B by driving pump 126B. In addition, the adjustment tank 120B can be supplied with fresh electrolyte 20 from tank 127B by driving pump 128B.

[0046] When valve 121 is opened, the electrolyte 20 flows from the anode chamber 21 to the adjustment tank 120A by gravity and is recovered. Similarly, when valve 123 is opened, the electrolyte 20 flows from the cathode chamber 22 to the adjustment tank 120B by gravity and is recovered. The pH of the electrolyte 20 in the anode chamber 21 and the cathode chamber 22 can be individually neutralized in the corresponding adjustment tanks 120A and 120B.

[0047] When pump 122 is driven, neutralized electrolyte 20 can be supplied from the adjustment tank 120A to the anode chamber 21. Similarly, when pump 124 is driven, neutralized electrolyte 20 can be supplied from the adjustment tank 120B to the cathode chamber 22.

[0048] In this way, the pH of the electrolyte 20 in the anode chamber 21 and the cathode chamber 22 can be maintained individually and more consistently. The liquid volume of the electrolyte 20 in the anode chamber 21 and the cathode chamber 22 can also be adjusted. As described in the sixth embodiment, the pH and liquid volume of the electrolyte 20 may be maintained by automatic control. For example, the pH and liquid volume of the electrolyte 20 in the anode chamber 21 and the cathode chamber 22 may be detected by sensors, and valves 121 and 123 and pumps 122 and 124 may be driven according to the detection results.

[0049] <Eighth Embodiment> In the first embodiment, a solid, powdery absorbent material 9 was supplied to the electrolysis tank 2, but a liquid or gel-like absorbent material may also be supplied to the electrolysis tank 2. Figure 10 shows an example. The illustrated recovery device 1 includes a supply device 8A that replaces the supply device 8 of the first embodiment.

[0050] The supply device 8A comprises an absorption tower 10 and an introduction device 83. The configuration of the absorption tower 10 is as described above with reference to Figure 2. The introduction device 83 comprises a pump 84 and an introduction pipe 85 that introduces the absorbent material pumped from the pump 84 into the electrolysis tank 2 (anode chamber 21). The pump 84 is in communication with the drainage section 11e via a valve 16. The introduction pipe 85 is provided with an opening / closing device 86 that constitutes a shutter for opening and closing the introduction pipe 85.

[0051] When the valve 16 and the inlet pipe 85 are opened and the pump 84 is driven, a liquid or gel-like absorbent material containing absorbed carbon dioxide is supplied from the storage section 11a to the anode chamber 21.

[0052] <Ninth Embodiment> The embodiments described above can be combined as appropriate. Furthermore, when an amine compound such as IPDA is used as the absorbent, carbon dioxide desorption (in other words, the state transition between the liquid phase and the solid phase) can be repeated, and the material can be reused. Figure 111 shows an example of a combination.

[0053] The supply device 8B has the same configuration as the supply device 8A described in the seventh embodiment, and supplies a liquid or gel-like absorbent containing carbon dioxide to the electrolysis tank 2. However, as in the first embodiment, it is also possible to supply powdered carbamic acid as the absorbent, or to supply a flake-like absorbent containing carbon dioxide. In that case, a drying, solid-liquid separation, and pulverization device 130 can be provided to dry the liquid or gel-like absorbent, separate the solid and liquid if it is in a solid-liquid dispersion state, and then pulverize the solid into powder or flake before introducing it into the electrolysis tank 2 (anodic chamber 21). It is also possible to supply fresh IPDA liquid stored in the tank 160 to the absorption tower 10.

[0054] The recovery device 1 is equipped with a removal device (fuel cell device) 110 as described in the fifth embodiment. As described in the fifth embodiment, the removal device 110 generates electricity using the oxygen and hydrogen recovered from the electrolysis tank 2, and this electricity is supplied to the power supply device 5. Carbon dioxide discharged from the piping 63 of the recovery unit 6B is stored in the tank 64, and water is stored in the tank 140.

[0055] The water stored in tank 140 is supplied to the adjustment tank 120 described in the sixth embodiment. By exchanging the electrolyte 20 in the adjustment tank 120 with that in the electrolysis tank 2, the pH and volume of the electrolyte 20 in the anode chamber 21 and the cathode chamber 22 are adjusted. The adjustment tank 120 can also be supplied with an electrolyte containing the electrolytes that make up the electrolyte 20, or a pure solvent (pure water), from tank 150, making it possible to adjust the concentration of the electrolyte 20.

[0056] The electrolyte 20 in the adjustment tank 120 contains IPDA. By returning the electrolyte 20 in the adjustment tank 120 to the absorption tower 10 (for example, the storage section 11a), the IPDA can be reused.

[0057] This configuration allows for reduced power consumption and reuse of the electrolyte 20 or IPDA, resulting in an overall more economical system. Furthermore, by utilizing gravity to circulate the electrolyte 20 and IPDA, power consumption can be further reduced.

[0058] The invention is not limited to the embodiments described above, and various modifications and changes are possible within the scope of the gist of the invention. [Explanation of Symbols]

[0059] 1 Carbon dioxide recovery unit, 2 Electrolysis tank, 3 Anode, 4 Cathode, 6 Recovery unit, 7 Recovery unit

Claims

1. An electrolysis cell comprising an anode and a cathode, and containing an electrolyte solution containing an absorbent material that has absorbed carbon dioxide, The system includes a recovery means for recovering carbon dioxide generated at the anode by the electrolysis of the electrolyte, A carbon dioxide capture device characterized by the following features.

2. A carbon dioxide recovery device according to claim 1, The electrolysis tank is The electrolysis tank is provided with a diaphragm that divides the inside of the electrolysis tank into an anode chamber where the anode is located and a cathode chamber where the cathode is located. A carbon dioxide capture device characterized by the following features.

3. A carbon dioxide recovery device according to claim 1, The electrolysis cell is equipped with a supply means for supplying the absorbent material. A carbon dioxide capture device characterized by the following features.

4. A carbon dioxide recovery device according to claim 3, The supply means is An absorption tower that brings a gas into contact with a carbon dioxide absorption liquid, and absorbs the carbon dioxide contained in the gas into the absorption liquid to produce the absorbent material, The system includes an introduction means for introducing the absorbent material generated in the absorption tower into the electrolysis cell, A carbon dioxide capture device characterized by the following features.

5. A carbon dioxide recovery device according to claim 3, The absorbent material is a powdered solid, The supply means is A housing section for housing the absorbent material, The system includes an input section for introducing the absorbent material from the storage section into the electrolysis tank, A carbon dioxide capture device characterized by the following features.

6. A carbon dioxide recovery device according to claim 1, The absorbent material is a substance capable of repeatedly desorbing and attaching carbon dioxide. A carbon dioxide capture device characterized by the following features.

7. A carbon dioxide recovery device according to claim 1, The electrolysis tank is equipped with a stirring means for stirring the electrolyte solution in the electrolysis tank. A carbon dioxide capture device characterized by the following features.

8. A carbon dioxide recovery device according to claim 1, The anode and the cathode extend in the depth direction of the electrolysis chamber. A carbon dioxide capture device characterized by the following features.

9. A carbon dioxide recovery device according to claim 1, The anode and the cathode have planar portions. A carbon dioxide capture device characterized by the following features.

10. A carbon dioxide recovery device according to claim 1, The anode and the cathode have spherical portions. A carbon dioxide capture device characterized by the following features.

11. A carbon dioxide recovery device according to claim 1, The aforementioned recovery means is Having an enclosure surrounding the anode, A carbon dioxide capture device characterized by the following features.

12. A carbon dioxide recovery device according to claim 1, The recovery means also recovers other gases generated at the anode along with carbon dioxide. The carbon dioxide recovery device is The recovery means includes a removal means for removing the other gases recovered by the recovery means, A carbon dioxide capture device characterized by the following features.

13. A carbon dioxide recovery device according to claim 1, The aforementioned recovery means also recovers oxygen generated at the anode along with carbon dioxide. The carbon dioxide recovery device is A hydrogen recovery means for recovering hydrogen generated at the cathode by the electrolysis of the electrolyte, The system includes a power generation means that generates electricity by chemically reacting oxygen recovered by the recovery means with hydrogen recovered by the hydrogen recovery means. A carbon dioxide capture device characterized by the following features.

14. A carbon dioxide recovery device according to claim 1, The recovery means includes a tank for storing the carbon dioxide, A carbon dioxide capture device characterized by the following features.

15. A carbon dioxide recovery device according to claim 1, The system includes a conditioning tank for supplying electrolyte to the electrolysis tank and recovering the electrolyte from the electrolysis tank. A carbon dioxide capture device characterized by the following features.

16. A carbon dioxide recovery device according to claim 1, The absorbent material is an amine compound. A carbon dioxide capture device characterized by the following features.

17. In an electrolysis cell equipped with an anode and a cathode, and containing an electrolyte containing an absorbent material that has absorbed carbon dioxide, electrolysis of the electrolyte is performed. The carbon dioxide generated at the anode by the electrolysis is recovered. A method for capturing carbon dioxide, characterized by the features described above.

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