Carbon dioxide capture module and carbon dioxide recovery device

Abstract

A carbon dioxide capture module is provided with: a first electrode; a second electrode; a solution in which the first electrode and the second electrode are immersed; a gas supply unit for supplying carbon dioxide to the solution; and a voltage applying mechanism that applies a voltage between the first electrode and the second electrode, the first electrode having a carbon dioxide capturing material containing a first metal having iron as the main component, and the second electrode containing carbon or a second metal having a lower ionization tendency than the first metal.

Description

Technical Field

[0001] The present invention relates to a carbon dioxide capture module and a carbon dioxide recovery device.

[0002] This application claims priority based on Japanese Patent Application No. 2022-166997 filed on October 18, 2022, and Japanese Patent Application No. 2023-056658 filed on March 30, 2023, and incorporates by reference all the descriptions recorded in the said Japanese applications. Background Art

[0003] In Patent Document 1, a system is disclosed in which the reduction amount of CO 2 (carbon dioxide) corresponding to the driving distance calculated based on the charging amount of an electric vehicle is associated with the user driving the electric vehicle, and thus the environmental protection points given to the user are managed.

[0004] In Patent Document 2, a method is disclosed in which in the presence of water, fine particles or aggregates of fine particles of a metal or a substance containing a metal with a low valence are brought into contact, and carbon dioxide is converted into a harmless substance as a carbonate of a metal with a high valence and immobilized.

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2012-59197

[0008] Patent Document 2: Japanese Patent Application Laid-Open No. 2007-075773 Summary of the Invention

[0009] The carbon dioxide capture module of the present invention includes: a first electrode; a second electrode; a solution in which the first electrode and the second electrode are immersed; a gas supply unit that supplies carbon dioxide to the solution; and a voltage application mechanism that applies a voltage between the first electrode and the second electrode. The first electrode has a carbon dioxide capture material containing a first metal mainly composed of iron. The second electrode contains a second metal or carbon having a smaller ionization tendency than the first metal. Brief Description of the Drawings

[0010] Figure 1 It is a schematic perspective view showing the configuration of the carbon dioxide recovery device according to the first embodiment.

[0011] Figure 2 It is a block diagram for explaining the configuration of the carbon dioxide recovery device according to the first embodiment.

[0012] Figure 3It is a cross-sectional schematic diagram showing the outline of the carbon dioxide capture module included in the carbon dioxide recovery device of the first embodiment.

[0013] Figure 4 It is a schematic perspective view showing the configuration of the capture material supply device included in the carbon dioxide recovery device of the first embodiment.

[0014] Figure 5 It is a block diagram for explaining the configuration of the capture material supply device included in the carbon dioxide recovery device of the first embodiment.

[0015] Figure 6 It is a cross-sectional schematic diagram showing the outline of the carbon dioxide capture module included in the carbon dioxide recovery device of the second embodiment.

[0016] Figure 7 It is a cross-sectional schematic diagram showing the outline of the carbon dioxide capture module included in the carbon dioxide recovery device of the third embodiment.

[0017] Figure 8 It is a diagram for explaining the outline of the carbon dioxide capture module included in the carbon dioxide recovery device of the fourth embodiment.

[0018] Figure 9 It is a diagram for explaining the outline of the carbon dioxide capture module included in the carbon dioxide recovery device of the fifth embodiment. Detailed Embodiments

[0019] [Problems to be Solved by the Present Invention]

[0020] The demand for reducing carbon dioxide is increasing day by day. As disclosed in Patent Document 1, the entities promoting the reduction are not limited to public bodies and enterprises, and the reduction is also being promoted at the individual level. However, the countermeasures that can be taken at the individual level are limited to relatively contributing to the reduction of carbon dioxide by not emitting it, rather than reducing the carbon dioxide that actually exists in the atmosphere. Therefore, it cannot be said that the opportunity for individuals to actually experience the reduction of carbon dioxide and the opportunity to obtain benefits based on the reduction are at hand. In addition, as shown in Patent Document 2, the research and development of carbon dioxide recovery methods are also being promoted. There is a demand for a device that can achieve a capture efficiency improved to a practical level with a simple configuration.

[0021] One object of the present invention is to provide a carbon dioxide capture module having excellent carbon dioxide capture efficiency.

[0022] [Effects of the Present Invention]

[0023] The carbon dioxide capture module of the present invention has excellent carbon dioxide capture efficiency.

[0024] "Description of Embodiments of the Present Invention"

[0025] First, embodiments of the present invention will be listed and described.

[0026] (1) A carbon dioxide capture module according to one embodiment of the present invention includes: a first electrode; a second electrode; a solution in which the first electrode and the second electrode are immersed; a gas supply unit that supplies carbon dioxide to the solution; and a voltage application mechanism that applies a voltage between the first electrode and the second electrode. The first electrode has a carbon dioxide capture material containing a first metal mainly composed of iron. The second electrode contains a second metal or carbon having a lower ionization tendency than the first metal.

[0027] In the carbon dioxide capture module of (1) above, carbon dioxide is supplied to the solution by the gas supply unit, and thus a part of the dissolved carbon dioxide is changed into carbonate ions or bicarbonate ions. That is, carbonate ions or bicarbonate ions are present in the solution. Hereinafter, carbonate ions and bicarbonate ions may be collectively referred to as carbonate ions and the like. In the carbon dioxide capture module of (1) above, a voltage is applied between the first electrode and the second electrode by the voltage application mechanism, and thus divalent iron ions are dissolved from the first metal contained in the carbon dioxide capture material into the solution. Therefore, in the carbon dioxide capture module of (1) above, the carbonate ions or bicarbonate ions present in the solution react with the dissolved divalent iron ions to form iron carbonate or iron bicarbonate. Hereinafter, iron carbonate and iron bicarbonate may be collectively referred to as iron carbonate and the like. In the carbon dioxide capture module of (1) above, the carbon dioxide capture material covers the solution, and thus it is easy to suppress the case where divalent iron ions are oxidized to trivalent iron ions or changed into iron oxide. On this basis, a voltage is applied between the first electrode and the second electrode by the voltage application mechanism, and thus it is easy to increase the dissolution amount of divalent iron ions. That is, it is easy to maintain a state where the ratio of divalent iron ions in the solution is increased. Therefore, the carbon dioxide capture module of (1) above can easily capture carbonate ions and the like, and thus the carbon dioxide capture efficiency is excellent.

[0028] (2) Based on the carbon dioxide capture module of (1) above, it may be that the voltage is 1 mV or more and 2 V or less.

[0029] If the voltage is 1 mV or more, it is easy to promote the formation of iron carbonate and the like. If the voltage is 2 V or less, the reaction between divalent iron ions and carbonate ions and the like is not likely to become unstable.

[0030] (3) Based on the carbon dioxide capture module of (1) or (2) above, it may be that the carbon dioxide capture material is a compacted body containing powder composed of the first metal, or a sintered body composed of the first metal.

[0031] The carbon dioxide capture efficiency of the carbon dioxide capture module in the above (3) is excellent.

[0032] (4) Based on the carbon dioxide capture module in the above (3), it is also possible that the average particle size of the powder is 1 μm or more and 2000 μm or less.

[0033] If the average particle size of the powder is 1 μm or more, the carbon dioxide capture efficiency is more likely to be improved. If the average particle size of the powder is 2000 μm or less, it is easier to process the powder.

[0034] (5) Based on any one of the carbon dioxide capture modules in the above (1) to the above (4), it is also possible that the first electrode has: an electrode substrate composed of a metal or carbon with an ionization tendency smaller than that of the first metal; and an electrode sheet disposed on the surface of the electrode substrate, and the electrode sheet is the carbon dioxide capture material.

[0035] In the carbon dioxide capture module in the above (5), the electrode sheet is used for reactions with carbonate ions and the like. By having an electrode substrate and an electrode sheet in the first electrode, even if all the electrode sheets are used for reactions with carbonate ions and the like, the electrode substrate remains. Therefore, when reconstructing the first electrode, it is only necessary to make a new electrode sheet contact the electrode substrate. On the other hand, when the first electrode is composed only of electrode sheets, when reconstructing the first electrode after all the electrode sheets are used for reactions with carbonate ions and the like, it is necessary to reconnect the electrode sheets to the wires of the voltage application mechanism. Therefore, the carbon dioxide capture module in the above (5) is easier to reconstruct the first electrode than the case where the first electrode is composed only of electrode sheets.

[0036] (6) Based on the carbon dioxide capture module in the above (5), it is also possible that a magnet is further provided, and the magnet is arranged to make the carbon dioxide capture material contact the electrode substrate.

[0037] In the carbon dioxide capture module in the above (6), the carbon dioxide capture material is not easily separated from the electrode substrate by the magnet, so it is easy to continue dissolving divalent iron ions from the first metal contained in the carbon dioxide capture material into the solution. In the carbon dioxide capture module in the above (6), even if all the carbon dioxide capture materials originally adsorbed on the electrode substrate are used for reactions with carbonate ions and the like, as long as new carbon dioxide capture materials are put into the solution, the newly added carbon dioxide capture materials can be adsorbed on the electrode substrate.

[0038] (7) Based on the carbon dioxide capture module in the above (5), it is also possible that the electrode substrate is a mesh-like member for mounting the electrode sheet.

[0039] In the carbon dioxide capture module of the above (7), since the electrode substrate is a mesh-like member, the carbon dioxide capture material input from the outside of the solution can be easily placed on the electrode substrate. In the carbon dioxide capture module of the above (7), the generated iron carbonate etc. can easily pass through the meshes of the mesh-like member, and thus it is easy to recover iron carbonate etc.

[0040] (8) Based on any one of the carbon dioxide capture modules of the above (1) to the above (7), it may also be that a sensor unit and a capture control unit are further provided. The sensor unit detects at least one selected from the group consisting of the carbon dioxide concentration of the solution, the temperature of the solution, the pH value of the solution, the turbidity of the solution, the amount of the capture product generated by the carbon dioxide capture module, the voltage value between the first electrode and the second electrode, and the current value flowing between the first electrode and the second electrode. The capture control unit controls the operation of the voltage application mechanism based on the detection result of the sensor unit.

[0041] By including the sensor unit and the capture control unit, the carbon dioxide capture module of the above (8) can easily control the generation reaction of iron carbonate etc.

[0042] (9) Based on any one of the carbon dioxide capture modules of the above (1) to the above (8), it may also be that the temperature of the solution is 4 °C or more and less than 200 °C.

[0043] If the temperature of the solution is 4 °C or more, the solubility of carbon dioxide is large. If the temperature of the solution is less than 200 °C, iron carbonate etc. are not easily thermally decomposed.

[0044] (10) Based on any one of the carbon dioxide capture modules of the above (1) to the above (9), it may also be that the pH of the solution is 0 or more and less than 12.

[0045] If the pH of the solution is 0 or more, iron carbonate is easily precipitated. If the pH of the solution is less than 12, iron hydroxide is not easily precipitated.

[0046] (11) Based on any one of the carbon dioxide capture modules of the above (1) to the above (10), it may also be that the solution contains water.

[0047] Since water is easily obtained, the carbon dioxide capture module of the above (11) can be easily operated at low cost.

[0048] (12) Based on the carbon dioxide capture module of the above (11), it may also be that the solution further contains at least one selected from the group consisting of an acidic substance, a dissolution promoter, a pH buffer, a carbonation promoter, a reducing agent, a metal ion chelating agent, and a washing aid.

[0049] The carbon dioxide capture module of the above (12) can easily maintain a state where the ratio of divalent iron ions in the solution increases, and thus it is easy to suppress a decrease in the carbon dioxide capture efficiency.

[0050] (13) Based on any one of the carbon dioxide capture modules in the above (1) to the above (12), it is also possible that the second metal is copper or platinum.

[0051] Copper or platinum is suitable as a constituent material of the second electrode.

[0052] (14) A carbon dioxide recovery device according to one aspect of the present invention includes any one of the carbon dioxide capture modules in the above (1) to the above (13), a recovery request input unit, a recovery result output unit, and a recovery control unit. The recovery control unit causes the recovery result of the carbon dioxide capture module based on a recovery request from the recovery request input unit to be output through the recovery result output unit.

[0053] The carbon dioxide recovery device of the above (14) can easily recover carbon dioxide by including the above carbon dioxide capture module with excellent carbon dioxide capture efficiency. In addition, the carbon dioxide recovery device of the above (14) can be used as an independent device with a simple configuration for recovering carbon dioxide, and thus has high convenience.

[0054] (15) Based on the carbon dioxide recovery device of the above (14), it is also possible that the recovery result output unit includes an item providing unit that provides an item corresponding to the recovery result, and the item has a capture product generated by the carbon dioxide capture module.

[0055] In the carbon dioxide recovery device of the above (15), a user of the device can obtain an item as a result of carbon dioxide recovery. The user actually obtains the capture product, and thereby can actually feel the contribution to the reduction of carbon dioxide. Therefore, activities for reducing carbon dioxide are promoted. In addition, since the item has a capture product, the generated capture product can be effectively utilized. As long as the capture product contained in the item is not burned again, the captured carbon dioxide will not be discharged. Therefore, it is easy to maintain a state with reduced carbon dioxide.

[0056] (16) Based on the carbon dioxide recovery device of the above (15), it is also possible that the item is a composite material having the capture product and a resin embedding the capture product.

[0057] In the carbon dioxide recovery device of the above (16), since the item is a composite material, the options for the item can be increased.

[0058] (17) Based on the carbon dioxide recovery device described in the above (15) or the above (16), it is also possible that the article has a one-dimensional code or a two-dimensional code indicating the operation information including the recovery result.

[0059] In the carbon dioxide recovery device described in the above (17), the user of the device can master the recovery result by using a terminal capable of reading a one-dimensional code or a two-dimensional code. In addition, it is easy to construct a system in which the user obtains various services based on the recovery result.

[0060] (18) Based on any one of the carbon dioxide recovery devices described in the above (14) to the above (17), it is also possible that a capture material input mechanism is further provided, and the capture material input mechanism inputs the carbon dioxide capture material into the interior of the carbon dioxide capture module.

[0061] The carbon dioxide recovery device described in the above (18) is equipped with a capture material input mechanism. Thus, it is easy for the user to have a direct feeling of participating in carbon dioxide reduction. Therefore, it promotes the activity of carbon dioxide reduction. In addition, even if all the carbon dioxide capture materials in the device are used in the reaction with carbonate ions, etc., new carbon dioxide capture materials themselves can be input into the solution.

[0062] (19) Based on the carbon dioxide recovery device described in the above (18), it is also possible that a capture material supply device is further provided, and the capture material supply device supplies the carbon dioxide capture material, and the capture material supply device is provided independently of the capture material input mechanism.

[0063] The carbon dioxide recovery device described in the above (19) is equipped with a capture material supply device. Thus, the user can obtain new carbon dioxide capture materials input into the solution. The user can directly get the carbon dioxide capture materials and input them personally for the purpose of recovery. Therefore, compared with the situation of investing money in the carbon dioxide recovery device, it is easy for the user to have a direct feeling of participating in carbon dioxide reduction. Therefore, it promotes the activity of carbon dioxide reduction.

[0064] "Details of Embodiments of the Present Invention"

[0065] The embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below represent a specific example of the present invention. The numerical values, shapes, materials, constituent elements, the arrangement and connection manners, sequences, etc. described below are examples of the embodiments. Each figure is a schematic diagram and is not a strictly drawn figure. In the figures, the same constituent elements are labeled with the same reference numerals. The description of the functions, etc. of the same constituent elements is appropriately omitted.

[0066] "First Embodiment"

[0067] [Carbon Dioxide Recovery Device]

[0068] Refer to Figures 1 to 5 , the carbon dioxide recovery device 100 of the first embodiment (hereinafter, sometimes simply referred to as the recovery device 100) will be described. The recovery device 100 recovers carbon dioxide. Figure 1 It is a three-dimensional schematic diagram for explaining the structure of the recovery device 100 of the first embodiment. Figure 2 It is a block diagram for explaining the internal structure of the recovery device 100 of the first embodiment. The recovery device 100 includes a carbon dioxide capture module 1 (hereinafter, sometimes simply referred to as the capture module 1), a recovery request input unit 20, a recovery result output unit 25, and a recovery control unit 29. The capture module 1 captures carbon dioxide. The recovery request input unit 20 accepts the input of a carbon dioxide recovery request based on a requester. The recovery result output unit 25 outputs the recovery result of the capture module 1. The recovery control unit 29 causes the recovery result based on the recovery request from the recovery request input unit 20 to be output through the recovery result output unit 25. One of the features of the recovery device 100 is that it includes a specific capture module 1.

[0069] [Carbon Dioxide Capture Module]

[0070] Figure 3 It is a schematic diagram of the configuration as an example of the configuration of the capture module 1 included in the recovery device 100 of the first embodiment. As Figure 3 shown, the capture module 1 uses the carbon dioxide capture material 111 (hereinafter, sometimes simply referred to as the capture material 111) in the solution 14 to fix carbon dioxide 161 to the capture product 60 for recovery. The capture module 1 includes a voltage application mechanism 17 that applies a voltage to the capture material 111. As Figure 1 shown, the capture module 1 is disposed inside the housing 40 of the recovery device 100. The portion of the front surface of the housing 40 that faces the capture module 1 can be formed of a transparent plate. In this way, the operating state of the capture module 1 can be visually observed from the outside. As Figure 3 shown, the capture module 1 of this example includes a first electrode 11, a magnet 13, a second electrode 12, a solution 14, a storage tank 15, a gas supply unit 16, a voltage application mechanism 17, a sensor unit 18, and a capture control unit 19. The capture module 1 of this example may further include at least one of a discharge mechanism, a solution adjustment mechanism, and a dissolution promotion mechanism (not shown).

[0071] (First Electrode)

[0072] The first electrode 11 is a working electrode. The first electrode 11 is connected to a power supply 17a via a wire 17b. The first electrode 11 is immersed in a solution 14. The first electrode 11 has a capture material 111 containing a first metal mainly composed of iron. The first metal mainly composed of iron means that when the whole of the first metal is 100% by mass, the proportion of iron in the first metal is 50% by mass or more. The proportion of iron in the first metal may also be 60% by mass or more, 70% or more. The first metal is pure iron or an iron alloy. The iron alloy is a metal containing, for example, at least one element selected from the group consisting of manganese, chromium, molybdenum, aluminum, copper, zinc, and nickel in addition to iron. Differently from this example, the first metal may mainly consist of an iron compound. The iron compound is, for example, iron(II) hydroxide, iron(II) hexacyanoferrate(II). The first electrode 11 may have a capture material 111 composed of any one of pure iron, an iron alloy, and an iron compound, or may have two or more capture materials 111.

[0073] When a voltage is applied between the first electrode 11 and the second electrode 12 by a voltage application mechanism 17 described later, divalent iron ions are dissolved from the first metal contained in the capture material 111 into the solution 14. These divalent iron ions react with carbonate ions (CO 3 2- ) or bicarbonate ions (HCO 3 - ) present in the solution 14, and iron carbonate or iron bicarbonate precipitates into the solution 14. By this reaction, carbon dioxide 161 is captured. This iron carbonate or iron bicarbonate is a capture product 60. The capture product 60 precipitates in the solution 14.

[0074] It is considered that the process of forming iron carbonate in the solution 14 is an electrochemical reaction as shown below.

[0075] Carbon dioxide 161 supplied to the solution 14 forms carbonate ions and hydrogen ions.

[0076] CO 2 +H 2 O→CO 3 2- +2H +

[0077] In the first electrode 11, iron becomes divalent iron ions and releases electrons.

[0078] Fe→Fe 2+ +2e -

[0079] In the second electrode 12, hydrogen ions combine with electrons to become hydrogen gas.

[0080] 2H + +2e- →H 2

[0081] In Solution 14, carbonate ions combine with iron ions to form iron carbonate.

[0082] Fe 2+ +CO 3 2- →FeCO 3

[0083] The capture material 111 in this example is a compacted powder body containing powder composed of a first metal, or a sintered body composed of the first metal. The compacted powder body is formed by pressing the powder. The sintered body is obtained by sintering the compacted powder body. Different from this example, the capture material 111 can be a smelting material or the like, or can be scrap iron obtained by crushing various iron materials into a size that can be processed.

[0084] The average particle size of the powder contained in the compacted powder body can be, for example, 1 μm or more and 2000 μm or less. If the average particle size of the above powder is 1 μm or more, it is easier to improve the carbon dioxide capture efficiency. If the average particle size of the above powder is 2000 μm or less, it is easy to process the powder. Further, the average particle size of the above powder can also be 25 μm or more and 1000 μm or less, and in particular, can also be 50 μm or more and 200 μm or less.

[0085] The average particle size of the powder can be obtained as follows. An observation image is obtained by observing the cross section of the compacted powder body using SEM (scanning electron microscope). The cross section of the formed body is an arbitrary cross section. The magnification of the SEM is 1000 times or more and 30000 times or less. The number of acquired observation images is 3 or more. The total cross-sectional area is 30 μm 2 or more. One observation image can be obtained for one cross section, or multiple observation images can be obtained for one interface. Image processing is performed on each of the acquired observation images to extract the contours of each particle. As the image processing, for example, binary processing can be cited. The diameter of a perfect circle having an area equal to the area of each particle is obtained. The average value of the diameters of all the perfect circles is the average particle size of the powder. The number of measurements is 10 or more.

[0086] The first electrode 11 in this example has an electrode substrate 11a and an electrode piece 11b. The electrode substrate 11a is made of a metal or carbon with a lower ionization tendency than the first metal. Metals with a lower ionization tendency than the first metal are, for example, copper or platinum. The electrode substrate 11a in this example is made of copper. The shape of the electrode substrate 11a is not particularly limited and can be appropriately selected. The shape of the electrode substrate 11a in this example is flat. The wire 17b is connected to the electrode substrate 11a. The electrode substrate 11a in this example is arranged to contact the inner surface of the bottom 15b of the container described later. The electrode piece 11b is provided on the surface of the electrode substrate 11a. The electrode piece 11b in this example contacts the upper surface of the electrode substrate 11a. The number of electrode pieces 11b can be singular or plural. The electrode piece 11b is the above-mentioned capture material 111. The shape of the capture material 111 is not particularly limited and can be appropriately selected. The capture material 111 is, for example, coin-shaped.

[0087] (Magnet)

[0088] The magnet 13 causes the capture material 111 to contact the electrode substrate 11a by attracting the capture material 111. The magnet 13 in this example is arranged to contact the outer surface of the bottom 15b of the container. Differently from this example, the magnet 13 can also be arranged to contact the inner surface of the bottom 15b of the container. That is, the magnet 13 can also be arranged between the lower surface of the electrode substrate 11a and the inner surface of the bottom 15b of the container. When the magnet 13 is arranged in a manner immersed in the solution 14, preferably, a resin coating or a plating of a metal with a lower ionization tendency than the second electrode 12 is formed on the surface of the magnet 13.

[0089] (Second electrode)

[0090] The second electrode 12 is a counter electrode. The second electrode 12 is connected to the power supply 17a via the wire 17c. The second electrode 12 is immersed in the solution 14. The second electrode 12 contains a second metal or carbon with a lower ionization tendency than the first metal. The second metal is, for example, copper or platinum. The second electrode 12 in this example is made of the same material as the electrode substrate 11a. That is, the second electrode 12 in this example is made of copper. The shape of the second electrode 12 is not particularly limited and can be appropriately selected. The shape of the second electrode 12 in this example is flat.

[0091] (Solution)

[0092] In the solution 14, the first electrode 11 and the second electrode 12 are immersed. That is, the solution 14 covers the first electrode 11 and the second electrode 12. The solution 14 is stored in the storage tank 15. A gas containing carbon dioxide 161 is supplied from the gas supply unit 16 to the solution 14. A part of the carbon dioxide 161 supplied to the solution 14 changes into carbonate ions or bicarbonate ions.

[0093] The pH of the solution 14 and the potential of the capture material 111 can also be controlled within the range where divalent iron ions or divalent iron hydroxide is stable in the potential-pH diagram. That is, the pH of the solution 14 and the potential of the capture material 111 can also be controlled to increase the content ratio of divalent iron ions or divalent iron hydroxide in the solution 14. By such control, the capture efficiency of carbon dioxide 161 can be more easily improved. Herein, the "potential-pH diagram" refers to the potential-pH diagram of iron in the solution 14 at 25°C.

[0094] The pH of the solution 14 is, for example, 0 or more and less than 12. If the pH of the solution 14 is 0 or more, iron carbonate is likely to precipitate. If the pH of the solution 14 is less than 12, iron hydroxide is not likely to precipitate. Further, the pH of the solution can also be 0 or more and 9 or less, and particularly, can also be 0 or more and 6 or less.

[0095] The temperature of the solution 14 is, for example, 4°C or more and less than 200°C. If the temperature of the solution 14 is 4°C or more, the solubility of carbon dioxide is large. If the temperature of the solution 14 is less than 200°C, iron carbonate is not likely to thermally decompose. Further, the temperature of the solution can be 15°C or more and 150°C or less, and particularly, can also be 25°C or more and 99°C or less.

[0096] The solution 14 contains water as a solvent. The solution 14 can also contain a carbonate as a carbon dioxide supply source. The carbonate generates carbonate ions by dissolving in the solution. The carbonate is, for example, sodium carbonate, sodium bicarbonate, or potassium carbonate. The solution 14 can further contain a solution regulator. The solution regulator is, for example, at least one selected from the group consisting of an acidic substance, a dissolution promoter, a pH buffer (buffer solution), a carbonation promoter, a reducing agent, a metal ion chelator, and a washing aid.

[0097] The acidic substance decreases the pH of the solution 14. The acidic substance is preferably a substance with a smaller chelating effect than citric acid. The acidic substance is a salt that shows acidity in the solution 14. The salt that shows acidity in the solution 14, that is, the salt that dissolves in the solution 14 and shows acidity, is, for example, sodium bisulfate, ammonium bisulfate, sodium dihydrogen phosphate, iron(II) sulfate, or iron(II) chloride. By the solution 14 containing the acidic substance, it is easy to maintain the state where the divalent iron ions in the solution 14 increase, and thus the capture efficiency of carbon dioxide 161 is not likely to decrease.

[0098] The dissolution promoter promotes the dissolution of carbon dioxide 161 into the solution 14. The dissolution promoter is, for example, carbonic anhydrase. Carbonic anhydrase promotes the formation of bicarbonate ions. By the solution 14 containing the dissolution promoter, the amount of carbon dioxide 161 in the solution 14 is likely to increase, and thus the capture efficiency of carbon dioxide 161 is likely to be improved.

[0099] The pH buffer makes it easy to maintain the pH of solution 14 at the desired value. Examples of the pH buffer include sodium tartrate, sodium acetate, sodium borate, sodium citrate, ammonium chloride, and sodium phosphate. By including a pH buffering material in solution 14, it is easy to maintain the state where the ratio of divalent iron ions in solution 14 increases, and thus the capture efficiency of carbon dioxide 161 is not easily reduced.

[0100] The carbonation promoter promotes the carbonation of divalent iron ions eluted from the capture material 111. The shape of the carbonation promoter is not particularly limited and can be appropriately selected. The carbonation promoter is, for example, granular. The carbonation promoter has iron carbonate or iron hydrogencarbonate as the main component. The carbonation promoter can serve as a seed crystal for carbonating divalent iron ions. By including the carbonation promoter in solution 14, the capture efficiency of carbon dioxide 161 is easily increased.

[0101] The reducing agent, metal ion chelator, and builder inhibit the oxidation of divalent iron ions in solution 14. Examples of the reducing agent include polyphenols such as catechin or chlorogenic acid. Examples of the metal ion chelator include citric acid or gluconic acid. Examples of the builder include carbonate, silicate, aluminosilicate, sulfate, or carboxymethyl cellulose (CMC). By including a reducing agent, metal ion chelator, or builder in solution 14, it is easy to maintain the state where the ratio of divalent iron ions in solution 14 increases, and thus the capture efficiency of carbon dioxide 161 is not easily reduced.

[0102] (Storage tank)

[0103] The storage tank 15 stores the solution 14. Inside the storage tank 15, a first electrode 11 and a second electrode 12 are arranged. The storage tank 15 has a supply port 15d and a discharge port 15e. The supply port 15d is an opening for introducing the solution 14 and the capture material 111 into the storage tank 15 from the outside. The supply port 15d is provided, for example, at the top 15a of the storage tank 15. The supply port 15d of this example is always open. Since the supply port 15d is always open, the gas that rises in the solution 14 and is released from the liquid surface of the solution 14 is discharged from the supply port 15d to the outside of the storage tank 15. Therefore, the pressure in the gas phase portion 151 of the storage tank 15, that is, the pressure of the gas in contact with the solution 14, decreases, and thus the content ratio of dissolved oxygen in the solution 14 tends to decrease. Therefore, the oxidation effect caused by dissolved oxygen in the solution 14 is reduced, and it is easy to maintain a state where the ratio of divalent iron ions in the solution 14 increases. Different from this example, a lid that can be freely opened and closed may be provided at the supply port 15d. When the supply port 15d is closed by the lid, the above-mentioned gas cannot be discharged to the outside of the storage tank 15. Therefore, the above-mentioned pressure becomes high, and thus it is easy to promote the generation of the capture product 60. The discharge port 15e is an opening for discharging the solution 14 and the generated capture product 60 from the inside of the storage tank 15 to the outside. The discharge port 15e is provided, for example, at the lower part of the side wall portion 15c of the storage tank 15. The discharge port 15e is connected to a first discharge pipe of a discharge mechanism (not shown) described later.

[0104] (Gas supply unit)

[0105] The gas supply unit 16 supplies carbon dioxide 161 to the solution 14. The gas supply unit 16 has, for example, a supply source of carbon dioxide 161, i.e., a carbon dioxide tank 16a, a first pipe 16b connecting the carbon dioxide tank 16a to the liquid phase portion of the storage tank 15, and a valve provided on the first pipe 16b. The carbon dioxide tank 16a is also called a carbon dioxide cylinder. The carbon dioxide in the carbon dioxide tank 16a is preferably, for example, carbon dioxide recovered from the exhaust gas generated by the combustion of fossil fuels. By using the pre-recovered carbon dioxide as the supply source, the carbon dioxide in the atmosphere is indirectly reduced. The carbon dioxide tank 16a can use a carbon dioxide tank of a generally circulated specification. A carbon dioxide tank of a generally circulated specification can be obtained from various operators. The concentration of carbon dioxide in the carbon dioxide tank 16a is, for example, 10% by volume or more, and there is no limitation. The concentration of carbon dioxide in the carbon dioxide tank 16a is preferably 80% by volume or more, 100% by volume. The first pipe 16b is a flow path for carbon dioxide 161 from the carbon dioxide tank 16a to the liquid phase portion. The valve is provided to adjust the flow rate of the carbon dioxide 161 supplied to the liquid phase portion. The adjustment of the flow rate can also be performed by the capture control unit 19. Although not shown, the gas supply unit 16 may also have a flow sensor for detecting the flow rate. The flow sensor is a commercially available flow sensor. The information of the flow sensor is sent to the capture control unit 19.

[0106] (Voltage application mechanism)

[0107] The voltage application mechanism 17 applies a voltage between the first electrode 11 and the second electrode 12. The voltage is applied such that a current flows between the first electrode 11 and the second electrode 12. By the current flow, divalent iron ions are easily eluted from the capture material 111 provided in the first electrode 11. The voltage application mechanism 17 includes a power source 17a, a wire 17b connecting the power source 17a and the first electrode 11, and a wire 17c connecting the power source 17a and the second electrode 12. The voltage value can be appropriately selected according to the flow rate of carbon dioxide 161, the temperature of the solution 14, or the pH value of the solution 14, etc. The voltage value is, for example, 1 mV or more and 2 V or less, further 10 mV or more and 1.6 V or less, particularly 100 mV or more and 1.2 V or less. If the voltage value is 1 mV or more, the generation of the capture product 60 is easily promoted. If the voltage value is 2 V or less, the reaction between divalent iron ions and carbonate ions is less likely to become unstable. Although not shown, the voltage application mechanism 17 may also include a voltage adjustment unit that performs on / off of the voltage and adjustment of the voltage value. The control of the voltage adjustment unit is performed by the capture control unit 19.

[0108] (Sensor unit)

[0109] The sensor unit 18 detects at least one selected from the group consisting of the carbon dioxide concentration of the solution 14, the temperature of the solution 14, the pH value of the solution 14, the turbidity of the solution 14, the amount of the capture product 60 generated by the capture module 1, the voltage value between the first electrode 11 and the second electrode 12, and the current value flowing between the first electrode 11 and the second electrode 12. In the detection of the carbon dioxide concentration of the solution 14, the temperature of the solution 14, the pH value of the solution 14, the turbidity of the solution 14, the amount of the capture product 60, the voltage value, and the current value, commercially available sensors capable of measuring each can be used. The detection result of the sensor unit 18 is sent to the capture control unit 19.

[0110] (Capture control unit)

[0111] The capture control unit 19 performs various processes required for the operation of the capture module 1. The capture control unit 19 controls the operation of the voltage application mechanism 17 based on the detection result of the sensor unit 18. The capture control unit 19 controls the timing of the start and end of the application of the voltage based on the voltage of the voltage adjustment unit included in the voltage application mechanism 17. As will be described later, the start of the voltage application is performed after the capture material 111 is introduced into the interior of the storage tank 15. For example, the start of the voltage application may also be performed when the carbon dioxide concentration of the solution 14 becomes a predetermined value or more after the introduction of the capture material 111. If the amount of carbon dioxide 161 captured increases, that is, the amount of the capture product 60 generated increases, then the temperature of the solution 14, the pH value of the solution 14, the turbidity of the solution 14, the amount of the capture product 60, and the current value change. Preferably, the correlation between the weight of the capture material 111 and the temperature of the solution 14, the pH value of the solution 14, the turbidity of the solution 14, and the current value at the completion time point of the generation reaction of all the capture products 60 is obtained in advance, and the above correlation is stored in the storage unit included in the capture control unit 19 as a table. The end of the voltage application may also be performed based on the above correlation. In addition, the capture control unit 19 may perform the end of the voltage application after a predetermined time has elapsed since the start of the voltage application without using the sensor unit 18.

[0112] The capture control unit 19 may also control the opening and closing of the valve of the discharge mechanism described later based on the detection result of the sensor unit 18. For example, when the amount of the capture product 60 becomes a predetermined value or more, when the temperature of the electrolytic solution becomes a predetermined value or more, or when the turbidity of the solution 14 becomes a predetermined value or more, the valve of the discharge mechanism may be opened so that the solution 14 flows into the first discharge pipe described later. Other than this, the valve of the discharge mechanism is kept closed so that the solution 14 does not flow into the first discharge pipe described later. The capture control unit 19 may also control the opening and closing of the valve of the gas supply unit 16 based on the detection result of the above flow sensor. The capture control unit 19 may also control the start and end of the supply of the solution adjustment mechanism described later based on the detection result of the pH value of the solution 14.

[0113] (Discharge mechanism)

[0114] The discharge mechanism (not shown) is connected to the discharge port 15e and is used to take out the solution 14 and capture the product 60 from the storage tank 15. The discharge mechanism preferably has, for example, a filter, a tank, a first discharge pipe, a second discharge pipe, and a valve. The filter filters the solution 14 in the storage tank 15. By filtering the solution 14, the captured product 60 contained in the solution 14 is taken out. The tank stores the filtrate. The first discharge pipe connects the discharge port 15e of the storage tank 15 and the filter. The second discharge pipe connects the filter and the tank. The valve opens and closes the first discharge pipe. When the first discharge pipe is closed by the valve, the solution 14 in the storage tank 15 does not flow in the first discharge pipe. When the first discharge pipe is opened by the valve, the solution 14 in the storage tank 15 flows in the first discharge pipe. The filtrate flows into the tank through the second discharge pipe. In addition, the filtrate may not be stored in the tank but may be returned to the storage tank 15 by an additionally provided pump. In this case, the second discharge pipe connects the filter and the storage tank 15. The minimum configuration of the discharge mechanism is a valve provided at the discharge port 15e of the storage tank 15. When the discharge mechanism is only a valve, the captured product 60 stored in the storage tank 15 is recovered during the inspection by the staff described later.

[0115] (Solution adjustment mechanism)

[0116] The solution adjustment mechanism (not shown) supplies, for example, at least one selected from the group consisting of the above-mentioned acidic substances, reducing agents, metal ion chelating agents, and washing aids to the solution 14. For example, when the pH of the solution 14 rises, the solution adjustment mechanism supplies the above-mentioned acidic substance to the solution 14. The solution adjustment mechanism supplies at least one of a reducing agent, a metal ion chelating agent, and a washing aid, for example, to inhibit the oxidation of divalent iron ions in the solution 14. The upper limit of the pH of the solution 14 at which the solution adjustment mechanism starts to supply the above-mentioned acidic substance may be 6.0, may be 5.0, may be 4.0, or may be 3.0. Since the solution adjustment mechanism can easily maintain the state in which the divalent iron ions in the solution 14 increase, it is easy to maintain the capture efficiency of carbon dioxide 161.

[0117] (Dissolution promotion mechanism)

[0118] The dissolution promotion mechanism (not shown) promotes the dissolution of carbon dioxide 161 into the solution 14 as described above. The capture module 1 is provided with the dissolution promotion mechanism, so that it is easy to increase the amount of carbon dioxide 161 in the solution 14. Therefore, the capture efficiency of carbon dioxide 161 is further improved. The dissolution promotion mechanism includes, for example, at least one of the following devices: a bubble generation device capable of generating minute bubbles such as nanobubbles or microbubbles in the solution 14, an ultrasonic wave generation device capable of generating cavitation bubbles in the solution 14, and a temperature and pressure control device capable of lowering the water temperature of the solution 14 and increasing the partial pressure of carbon dioxide 161.

[0119] [Recovery request input unit]

[0120] Figure 2 The recovery request input unit 20 shown inputs a recovery request for carbon dioxide based on the requester. The input of the recovery request based on the requester is performed by either the input of money 211 such as settlement by cash, credit card, or electronic money, or the input of the capture material 111. As Figure 1 shown, the recovery request input unit 20 of this example includes a money acceptance unit 21 and a capture material acceptance unit 22.

[0121] The money acceptance unit 21 has a bill insertion slot 21a for inserting bills and a coin insertion slot 21b for inserting coins, a counting device (not shown) for detecting the types and amounts of the bills and coins passing through the bill insertion slot 21a and the coin insertion slot 21b, and a reading unit 21c for reading non-contact IC (integrated circuit) cards such as credit cards or smartphones. The bill insertion slot 21a, the coin insertion slot 21b, and the reading unit 21c are provided on the front surface of the housing 40. The counting device for detecting the types of bills and coins can use the counting device for detecting the types of bills and coins mounted on a general vending machine. The reading unit 21c can use a reading panel or the like mounted on a general vending machine.

[0122] The capture material acceptance unit 22 has a capture material insertion slot 22a for inserting the capture material 111 and a sensor unit (not shown) for detecting the quantity or weight of the inserted capture material 111. The capture material insertion slot 22a is provided on the front surface of the housing 40. The capture material 111 inserted from the capture material insertion slot 22a is inserted into the interior of the capture module 1 through a capture material insertion mechanism 24 described later. The capture material 111 inserted from the capture material insertion slot 22a is, for example, in the shape of a coin. In the detection of the quantity or weight of the capture material 111, a commercially available weight sensor or the like can be used.

[0123] [Capture material supply unit]

[0124] Figure 2 The capture material supply unit 23 shown has a plurality of capture material storage units (not shown) for storing the capture material 111. As Figure 3 shown, the capture material supply unit 23 includes a capture material insertion mechanism 24 for inserting the capture material 111 into the interior of the capture module 1. In addition, Figure 3In [the figure], as the minimum configuration of the capture material input mechanism 24, only the chute 24a connected to the supply port 15d of the storage tank 15 is shown. The chute 24a is a passage for the capture material 111 to slide and move from the capture material storage section and the capture material input port 22a to the supply port 15d of the capture module 1. The capture material input mechanism 24 may also include other elements required to input the capture material 111 into the interior of the capture module 1, and there is no particular limitation as long as it can be achieved by a known mechanism. Other elements are, for example, an electric support rod for dropping the capture materials 111 one by one from the capture material storage section. The capture material storage section is provided inside the housing 40. The capture materials 111 stored in the capture material storage section are prefabricated capture materials 111. Each of the capture materials 111 stored in the capture material storage section is preferably, for example, a coin-shaped compacted powder body or a sintered body.

[0125] The capture material 111 input through the capture material input mechanism 24 is the capture material 111 stored in the capture material storage section or the capture material 111 input from the capture material input port 22a. When the recycling request is based on the money receiving section 21, an amount of the capture material 111 corresponding to the settled amount is input from the capture material storage section into the interior of the capture module 1 through the capture material input mechanism 24. The capture material 111 input into the interior of the capture module 1 forms part of the first electrode 11. In this example, the capture material 111 adsorbed on the surface of the electrode substrate 11a by the above-mentioned magnet 13 forms the electrode sheet 11b.

[0126] [Recycling result output section]

[0127] Figure 2 The shown recycling result output section 25 outputs a recycling result corresponding to the input recycling request. The recycling result typically refers to the amount of carbon dioxide that can be captured by the capture material 111 input into the capture module 1. The recycling result may also be the amount of the capture product 60 generated by the capture module 1. The recycling result output section 25 has an article storage section (not shown) storing a plurality of articles 27. The stored articles 27 are prefabricated tangible objects. The output of the recycling result includes providing the stored articles 27.

[0128] The article 27 in this example has a capture product 60 generated in advance by the capture module 1. The article 27 may also be composed of, for example, a composite material having the capture product 60 and a resin embedding the capture product 60. The composite material preferably has the capture product 60 as the main component. Having the capture product 60 as the main component means that when the entire composite material is 100% by mass, the proportion of the capture product 60 in the composite material contains 50% by mass or more. As Figure 1As shown, an example of the article 27 in this example is a card 28 made of a composite material. The card 28 has, for example, a one-dimensional code or a two-dimensional code on its surface indicating operation information including the recycling result. The operation information refers to information including the identification information of the recycling device 100 other than the recycling result, the operation date, and the operation time, etc. The one-dimensional code is, for example, a bar code. The two-dimensional code is, for example, a QR code (registered trademark). The card 28 in this example has a QR code 28a.

[0129] Differently from this example, the composite material can also be a decorative component for decoration or a living component, etc. The decorative component for decoration is, for example, jewelry such as a ring, a necklace, or a pendant. The living component is, for example, kitchen utensils such as a spoon or a fork. Differently from this example, the provided article 27 may not have the capture product 60. Additionally, an article different from the provided article 27 that does not have the capture product 60 may be provided. An article that does not have the capture product 60 is, for example, a paper medium printed with a one-dimensional code or a two-dimensional code.

[0130] As Figure 1 shown, the recycling result output unit 25 in this example includes an article providing unit 26 that provides an article 27 corresponding to the recycling result of the capture module 1. The article providing unit 26 is not particularly limited as long as it is configured to provide the article 27. The article providing unit 26 has, for example, a conveying mechanism (not shown) that conveys the article 27 from an article storage unit, and as Figure 1 shown, a take-out port 26a for discharging the article 27. The conveying mechanism can utilize the conveying mechanism of an ordinary card 28 vending machine. The take-out port 26a is provided on the front surface of the housing 40.

[0131] [Recycling control unit]

[0132] Figure 2 As shown, the recycling control unit 29 is a control device that performs various processes required for the operation of the recycling device 100. The recycling control unit 29 controls the respective parts of the recycling device 100 to perform a series of operations based on a recycling request from the recycling request input unit 20.

[0133] In addition, the recycling control unit 29 preferably has a communication function. By having a communication function in the recycling control unit 29, information can be received and transmitted to an external device. Additionally, through the communication function, credit settlement, processing of electronic money, etc. can be performed in the recycling request input unit 20.

[0134] The basic processing of the recovery control unit 29 will be described. The recovery control unit 29 detects the acceptance of a request from the recovery request input unit 20. If a request acceptance is detected, the recovery control unit 29 instructs to supply the capture material 111 to the capture module 1. When the request acceptance is a signal from the capture material acceptance unit 22, an instruction is given to the capture material supply unit 23 in such a way that the input capture material 111 remains as it is and becomes the object to be processed. When the request acceptance is a signal from the money acceptance unit 21, an instruction to the capture material supply unit 23 is output in such a way that a predetermined amount of the capture material 111 according to the amount of the money 211 is used as the object to be processed. In this example, for instance, the supply of the capture material 111 can be carried out by operating the support rod of the capture material input mechanism 24.

[0135] The recovery control unit 29 controls the operation of the capture module 1. The operation control includes various monitoring controls required for actions such as the status monitoring of the capture module 1, the supply control from the carbon dioxide tank 16a, the adjustment of the solution, the control of the power supply voltage, etc. The recovery control unit 29 instructs the article providing unit 26 to output the article 27. The provision of the article 27 includes the printing of a one-dimensional code or a two-dimensional code. In addition, the recovery control unit 29 gives instructions for various displays to the display output unit 30 described later.

[0136] [Display output unit]

[0137] The recovery device 100 has a display output unit 30 including a display. The recovery control unit 29 gives instructions for various displays to the display output unit 30. The display output unit 30 displays the operation guidance of the recovery device 100, the presence or absence of the input of the capture material 111, the amount of input or payment, the operation status of the capture module 1, the availability of using the recovery device 100, etc. The display output unit 30 in this example is a display such as a liquid crystal display. The display output unit 30 is provided on the front surface of the housing 40. The display output unit 30 may also be provided with a speaker for outputting sound, or a lighting device such as a lamp for outputting light.

[0138] [Inspection port]

[0139] Figure 1 The shown inspection port 31 is an opening for the staff to access the inside of the housing 40. A door that can be freely opened and closed is provided at the inspection port 31. The inspection port 31 in this example is provided on the side surface of the housing 40. The staff can conduct inspections and replacements of the capture module 1, inspections and replacements of the carbon dioxide tank 16a, recovery and filling of the solution 14, recovery of the capture product 60, replenishment of the capture material 111 stored in the capture material storage unit, etc. from the inspection port 31. The position and size of the inspection port 31 are not limited. The inspection port 31 may also be the front door of the housing 40.

[0140] [Operation input unit]

[0141] As Figure 2 shown, the recovery device 100 preferably includes an operation input unit 32 for notifying the start and end of an inspection operation to the recovery control unit 29 and performing various setting inputs, etc. The operation input unit 32 is various input units including a switch for maintenance inspection. The operation input unit 32 is provided inside the Figure 1 frame 40 shown.

[0142] [Capture material supply device]

[0143] The recovery device 100 may further include Figure 4 and Figure 5 the capture material supply device 50 shown. The capture material supply device 50 is a device that supplies the capture material 111 input to the capture module 1. The capture material supply device 50 may be configured as an independent device outside the frame 40 of the recovery device 100 as in this example. The capture material supply device 50 may be configured inside the frame 40 in a manner integrated with the recovery device 100, different from this example.

[0144] As Figure 5 shown, the capture material supply device 50 of this example includes a processing unit 51, a money acceptance unit 52, a capture material supply unit 53, a supply unit 54, a control unit 55, and a display output unit 56. Different from this example, the capture material supply device 50 may also be in a form that does not have the money acceptance unit 52 and the capture material supply unit 53. In addition, the capture material supply device 50 may also be in a form that does not include the processing unit 51.

[0145] The processing unit 51, for example, has Figure 4The input port 51a shown. Although not shown in the figure, the processing unit 51 has an inspection unit, a processing unit, and a separation unit inside the housing 58. The input port 51a is for inserting the processing member 511. A lid that can freely open and close the input port 51a may be provided at the input port 51a. The input port 51a of this example is provided on the upper surface of the housing 58. The processing member 511 is a material that should become the capture material 111. It is assumed that the processing member 511 is a processing target member containing a first metal. However, there are cases where the inserted processing member 511 contains a non-processing target member that does not contain the first metal. There are cases where the processing target member is a material containing a first metal but is a material larger than the specified size that can be inserted into the above-mentioned capture module 1. The inspection unit inspects whether the processing member 511 is a processing target member or a non-processing target member. The inspection unit is, for example, a mechanism having a magnet. By whether the processing member 511 adheres to the magnet, it is possible to distinguish whether the processing member 511 is a processing target member. The processing unit processes the processing target member. The processing unit is, for example, a crusher such as a grinder that can crush metal. The capture material 111 having a size outside the above-mentioned specified size range is processed by the processing unit into a capture material 111 having a size within the above-mentioned specified size range. The separation unit extracts the capture material 111 containing the first metal from the crushed pieces. The separation unit is, for example, a mechanism having a magnet. Through the above operations, the inserted processing member 511 is provided as the capture material 111 containing the first metal from the supply unit 54. The processing chips that do not contain the first metal are stored in the processing tank inside the capture material supply device 50.

[0146] The money receiving unit 52 has a banknote input port 52a and a coin input port 52b having the same configuration as the banknote input port 21a and the coin input port 21b of the above-mentioned money receiving unit 21. Although not shown in the figure, the money receiving unit 52 may further have a reading unit for reading a non-contact IC card or a smartphone in the same manner as the recycling device 100.

[0147] The capture material supply unit 53 has a capture material storage unit and a capture material input mechanism that are the same as the capture material storage unit and the capture material input mechanism 24 of the above-mentioned capture material supply unit 23, which are not shown in the figure.

[0148] The supply unit 54 has an outlet 54a for taking out the stored capture material 111 and an outlet 54b for taking out the capture material 111 processed from the processing member 511. Each of the outlets 54a and 54b opens to the front of the housing 58.

[0149] The control unit 55 controls the operations of each part of the capture material providing device 50, such as the processing unit 51, the money receiving unit 52, the capture material supply unit 53, and the display output unit 56. For example, the control unit 55 causes the inspection unit to operate based on the detection result of the situation where the processing member 511 is inserted. When the processing member 511 is a member to be processed according to the inspection result of the inspection unit, the control unit 55 causes the processing unit and the separation unit to operate in sequence. When the processing member 511 is a non-processing target member according to the inspection result of the inspection unit, the control unit 55 does not cause the processing unit and the separation unit to operate.

[0150] The display output unit 56 displays the operation guide of the capture material providing device 50, the inserted amount of money, whether the inserted processing member 511 is a member to be processed or a non-processing target member, the target time required for the processing of the member to be processed until the processing is completed by the processing unit, the processing of the member to be processed being in progress by the processing unit, the completion of the processing of the member to be processed, and so on. The display output unit 56 is provided on the front surface of the housing 58. The display output unit 56 in this example is the same as the above-mentioned display output unit 30.

[0151] Each process (each function) of the capture control unit 19, the recovery control unit 29, and the control unit 55 is implemented by a processing circuit including one or more processors. The above-mentioned processing circuit may be composed of an integrated circuit formed by combining one or more memories, various analog circuits, and various digital circuits on the basis of one or more processors. The above-mentioned one or more memories store programs (instructions) that cause the above-mentioned one or more processors to execute the above-mentioned respective processes. The above-mentioned one or more processors may execute the above-mentioned respective processes according to the above-mentioned programs read from the above-mentioned one or more memories, or may execute the above-mentioned respective processes according to a logic circuit designed in advance to execute the above-mentioned respective processes. The above-mentioned processor may be various processors suitable for computer control, such as a CPU, a GPU (Graphics Processing Unit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), and an ASIC (Application Specific Integrated Circuit). In addition, it may be that the above-mentioned multiple physically separated processors cooperate with each other to execute the above-mentioned respective processes. For example, the above-mentioned processors mounted on multiple physically separated computers cooperate with each other via a network such as a LAN (Local Area Network), a WAN (Wide Area Network), or the Internet to execute the above-mentioned respective processes. The above-mentioned program may be installed in the above-mentioned memory from an external server device or the like via the above-mentioned network, or may be circulated in a state stored in a recording medium such as a CD-ROM (Compact Disc Read Only Memory), a DVD-ROM (Digital Versatile Disk Read Only Memory), or a semiconductor memory, and installed in the above-mentioned memory from the above-mentioned recording medium.

[0152] Second Embodiment

[0153] 〔Carbon Dioxide Recovery Device〕

[0154] Refer to Figure 6, the carbon dioxide recovery device of the second embodiment will be described. In the carbon dioxide recovery device of the second embodiment, mainly, the structure of the electrode substrate 11a included in the capture module 1 is different from that of the first embodiment. The following description focuses on the differences from the first embodiment. The description of the same structures and the same effects as those of the first embodiment may sometimes be omitted. This also applies to the third to sixth embodiments described later. In Figure 6 the illustration of Figure 3 the sensor unit 18, the carbon dioxide tank 16a, and the capture control unit 19 shown in

[0155] [Carbon Dioxide Capture Module]

[0156] (First Electrode)

[0157] The electrode substrate 11a is a mesh-like member on which the electrode plate 11b is placed. The shape of the mesh-like member in this example is cage-like. The cage-like mesh-like member easily blocks the capture material 111 supplied to the inside of the storage tank 15 through the supply port 15d. Therefore, it is easy to bring the capture material 111 into contact with the mesh-like member. Differently from this example, the shape of the mesh-like member may also be a sheet-like porous body. The size of the mesh of the mesh-like member only needs to be such that the capture product 60 can pass through while the capture material 111 cannot pass through. The first electrode 11 may further include Figure 3 the magnet 13 shown in

[0158] (Storage Tank)

[0159] The bottom 15b of the storage tank 15 is inclined so as to descend toward the discharge port 15e. By inclining the bottom 15b, the capture product 60 passing through the mesh of the mesh-like member easily flows toward the discharge port 15e, and thus it is easy to recover the capture product 60.

[0160] 《Third Embodiment》

[0161] [Carbon Dioxide Recovery Device]

[0162] Referring to Figure 7 , the carbon dioxide recovery device of the third embodiment will be described. In the carbon dioxide recovery device of the third embodiment, the structure of the gas supply unit 16 included in the capture module 1 is different from that of the first embodiment. Figure 7 The illustration of Figure 3 the supply port 15d of the storage tank 15, the discharge port 15e of the storage tank 15, the sensor unit 18, the carbon dioxide tank 16a, and the capture control unit 19 shown in

[0163] [Carbon Dioxide Capture Module]

[0164] (Gas supply section)

[0165] The gas supply section 16 further includes a second pipe 16c and a pump 16d. The second pipe 16c connects the gas phase section 151 of the storage tank 15 to the first pipe 16b. The second pipe 16c is a flow path for the gas in the gas phase section 151 from the gas phase section 151 to the first pipe 16b. A part of the carbon dioxide 161 supplied from the carbon dioxide tank 16a to the solution 14 through the first pipe 16b is not used for the reaction with the divalent iron ions and is released from the liquid surface of the solution 14. That is, the gas in the gas phase section 151 contains carbon dioxide released from the liquid surface of the solution 14.

[0166] The pump 16d causes the gas in the gas phase section 151 to flow out into the second pipe 16c. The pump 16d in this example is a Venturi pump provided at the connection portion of the second pipe 16c and the first pipe 16b. The Venturi pump is a pump that utilizes the Venturi effect. The Venturi pump utilizes the flow of carbon dioxide in the first pipe 16b to suck out the gas from the second pipe 16c, whereby the gas in the gas phase section 151 flows out from the gas phase section 151 to the first pipe 16b through the second pipe 16c. The gas flowing from the second pipe 16c to the first pipe 16b is supplied to the solution 14. Since the carbon dioxide released from the liquid surface of the solution 14 without being used for the reaction with the divalent iron ions can be supplied to the solution 14, it is easy to increase the amount of carbon dioxide in the carbon dioxide tank 16a used for the reaction with the divalent iron ions. In Figure 7 shows a state where the lid of the top 15a of the storage tank 15 is closed. If the gas phase section 151 is a closed space, the gas in the gas phase section 151 easily flows into the second pipe 16c. Different from this example, the pump 16d may also be an electric pump provided in the middle of the second pipe 16c.

[0167] <<Fourth Embodiment>>

[0168] [Carbon Dioxide Recovery Device]

[0169] Refer to Figure 8 , and the carbon dioxide recovery device of the fourth embodiment will be described. In the carbon dioxide recovery device of the fourth embodiment, it is different from the first embodiment in terms of the circulation of a plurality of capture modules 1. In Figure 8 briefly shows Figure 3 the capture module 1 shown in

[0170] [Carbon Dioxide Capture Module]

[0171] The capture module 1 includes a drive mechanism for circulating a plurality of storage tanks 15. From Figure 8The storage tanks 15 on the left side face the storage tanks 15 on the right side and are successively the storage tank 15 in the first position, the storage tank 15 in the second position, the storage tank 15 in the third position, and the storage tank 15 in the nth position. The number n (n is a natural number) of the storage tanks 15 is not limited and can be determined in consideration of the size of the device, etc. Representatively, n is 3 or more and 20 or less, preferably 5 or more and 10 or less. The capture material 111 is not put into the storage tank 15 in the first position, and the solution 14 is stored therein.

[0172] The drive mechanism moves the storage tanks 15 in each position simultaneously. Specifically, the drive mechanism moves the storage tank 15 in the first position to the second position, moves the storage tank 15 in the second position to the third position, moves the storage tank 15 in the (n - 1)th position to the nth position, and moves the storage tank 15 in the nth position to the first position. The capture material 111 is put into the interior of the storage tank 15 that moves from the first position to the second position. When the capture material 111 is put in, the supply port 15d of the storage tank 15 is closed by the lid portion. The capture product 60 is generated during the successive movement from the second position to the nth position. In the storage tank 15 that moves to the nth position, the capture product 60 is recovered by discharging the solution 14 from the discharge port 15e, etc. Then, the lid portion is opened so that the supply port 15d of the storage tank 15 that moves from the nth position to the first position is opened. For the sake of easy understanding of the circulation of the storage tank 15, the above description is made in such a way that the storage tank 15 itself successively changes its position, but it is not limited to this way. For example, it may also be a way in which the input positions of the capture material 111 are successively changed without changing the positions of the plurality of storage tanks 15.

[0173] 《Fifth Embodiment》

[0174] [Carbon Dioxide Recovery Device]

[0175] Refer to Figure 9 , and the carbon dioxide recovery device of the fifth embodiment will be described. In the carbon dioxide recovery device of the fifth embodiment, it is different from the first embodiment mainly in that the capture module 1 includes the above-described dissolution promotion mechanism 70 and solution adjustment mechanism 71, and the solution 14 contains the above-described carbonation promoter 72. Figure 9 The illustration of the sensor unit 18, the carbon dioxide tank 16a, and the capture control unit 19 shown in Figure 3 is omitted. Although the illustration is omitted in Figure 9 , the capture module 1 of this example may also include Figure 3 the discharge port 15e of the storage tank 15 shown in

[0176] [Carbon Dioxide Capture Module]

[0177] (First Electrode)

[0178] The first electrode 11 has a trapping material 111 with a flat plate shape.

[0179] (Dissolution promoting mechanism)

[0180] The dissolution promoting mechanism 70 in this example is a bubble generating device capable of generating minute bubbles such as nano-bubbles or micro-bubbles in the solution 14. The bubble generating device micro-bubbles a gas containing carbon dioxide and supplies it to the solution 14. The bubble generating device is arranged in the flow path of carbon dioxide from the gas supply unit 16 to the storage tank 15.

[0181] The upper limit of the bubble diameter of the minute bubbles is, for example, 1.0 μm, 0.8 μm, or 0.6 μm. By the bubble diameter of the minute bubbles being 1.0 μm or less, it is easy to increase the contact area between carbon dioxide and the solution 14. The lower limit of the bubble diameter of the minute bubbles is not particularly limited. The lower limit of the bubble diameter of the minute bubbles is, for example, 0.005 μm. That is, the bubble diameter of the minute bubbles is, for example, 0.005 μm or more and 1.0 μm or less, 0.005 μm or more and 0.8 μm or less, 0.005 μm or more and 0.6 μm or less. In addition, the "bubble diameter" means the diameter at the time point of ejection from the bubble generating device.

[0182] (Solution adjusting mechanism)

[0183] As described above, the solution adjusting mechanism 71 supplies at least one selected from the group consisting of an acidic substance, a reducing agent, a metal ion chelating agent, and a detergent to the solution 14. The solution adjusting mechanism 71 can be controlled by the trapping control unit. The trapping control unit, for example, controls the start and stop of the supply of the above acidic substance based on the pH of the solution 14.

[0184] (Solution)

[0185] 〈Carbonation promoter〉

[0186] As described above, the carbonation promoter 72 can be a seed for carbonating divalent iron ions. That is, by using the carbonation promoter 72 as a seed, crystal growth of iron carbonate or the like promotes the trapping of carbonate ions or the like based on the iron ions eluted from the trapping material 111. In addition, by becoming a seed, the carbonation promoter 72 can suppress the situation where the trapping material 111 is covered with iron carbonate or the like and the reduction in the activity of the trapping material 111 accompanying the coverage. The carbonation promoter 72 can be arranged at an interval from the trapping material 111. By arranging the carbonation promoter 72 at an interval from the trapping material 111, it is possible to easily recover iron carbonate or the like using the carbonation promoter 72 as a seed. In addition, in the case where the trapping material 111 is covered with iron carbonate or the like, it is possible to selectively recover iron carbonate or the like using the carbonation promoter 72 as a seed without recovering the trapping material 111. InFigure 9 In the present example shown, the carbonation promoter 72 is disposed at an interval from the capture material 111 with a porous membrane 73 (to be described later) provided in the storage tank 15 interposed therebetween.

[0187] (Porous membrane)

[0188] The porous membrane 73 of the present example is provided to separate the carbonation promoter 72 and the capture material 111 in the vertical direction in the storage tank 15. The porous membrane 73 is disposed below the capture material 111 and above the carbonation promoter 72. Through this porous membrane 73, it is easy to maintain the interval between the carbonation promoter 72 and the capture material 111. By separating the carbonation promoter 72 and the capture material 111, it is possible to easily recover iron carbonate or the like using the carbonation promoter 72 as a seed crystal.

[0189] The porous membrane 73 may also be configured to inhibit the passage of iron carbonate or the like while allowing carbonate ions or the like to pass through. By inhibiting the passage of iron carbonate or the like through the porous membrane 73, it is possible to inhibit the case where iron carbonate or the like covers the capture material 111 using the carbonation promoter 72 as a seed crystal, and thus it is possible to further inhibit the decrease in the activity of the capture material 111. By allowing carbonate ions or the like to pass through the porous membrane 73, it is easy to promote the supply of carbonate ions or the like to the capture material 111.

[0190] The lower limit of the average pore diameter of the porous membrane 73 is, for example, 0.38 nm, 0.50 nm, or 1.00 nm. By the average pore diameter being 0.38 nm or more, it is easy for carbonate ions or the like to pass through. The upper limit of the average pore diameter is, for example, 20 nm, 15 nm, or 10 nm. By the average pore diameter being 20 nm or less, it is easy to inhibit the passage of iron carbonate or the like. That is, the average pore diameter is, for example, 0.38 nm or more and 20 nm or less, 0.50 nm or more and 15 nm or less, or 1.00 nm or more and 10 nm or less.

[0191] The capture module 1 of the present example may further include at least one of a display mechanism 74 and a degassing promotion mechanism 75.

[0192] (Display mechanism)

[0193] The display mechanism 74 displays the decrease in the activity of the capture material 111. By the capture module 1 including the display mechanism 74, it is easy to control the environment of the solution 14 in a manner that maintains the carbon dioxide capture efficiency.

[0194] The pH of solution 14 is related to the activity of the capture material 111. For example, when the pH is 4 or higher, the divalent iron ions dissolved from the capture material 111 decrease, and thus there is a possibility that the activity of the capture material 111 decreases. Therefore, the display mechanism 74 may include a pH indicator or a pH meter. More specifically, the display mechanism 74 may include a pH indicator supplied to the solution 14 or a pH meter capable of measuring the pH of the solution 14. By using the pH indicator or the pH meter to display the pH of the solution 14, it is possible to display the decrease in the activity of the capture material 111.

[0195] 〈pH Indicator〉

[0196] As the pH indicator, a pH indicator capable of indicating the decrease in the activity of the capture material 111 can be used. Examples of the pH indicator include thymol blue, methyl orange, methyl red, bromocresol purple, bromothymol blue (BTB), phenol red, and neutral red.

[0197] The dissolution rate of carbon dioxide in the solution 14 may also be equal to or lower than the carbonation rate of the capture material 111. By configuring in this way, it is possible to more reliably capture the carbon dioxide supplied from the gas supply unit 16 by the capture material 111. The upper limit of the ratio of the carbon dioxide content ratio (volume ppm) in the gas released from the solution 14 to the carbon dioxide content ratio (volume ppm) in the gas supplied from the gas supply unit 16 is, for example, 0.8, 0.6, or 0.4. By the above ratio being 0.8 or less, it is possible to more reliably capture the carbon dioxide supplied from the gas supply unit 16 by the capture material 111. The lower limit of the above ratio is not particularly limited. The lower limit of the above ratio is, for example, 0.1. That is, the above ratio is, for example, 0.1 or more and 0.8 or less, 0.1 or more and 0.6 or less, or 0.1 or more and 0.4 or less. The gas released from the solution 14 is the gas discharged from the degassing promotion mechanism 75 described later.

[0198] (Degassing Promotion Mechanism)

[0199] The degassing promotion mechanism 75 discharges the gas that rises in the solution 14 and is released from the liquid surface of the solution 14 to the outside of the storage tank 15. Therefore, the degassing promotion mechanism 75 can reduce the pressure in the gas phase portion of the storage tank 15, that is, the pressure of the gas in contact with the solution 14, and thus it is easy to reduce the dissolved oxygen content ratio in the solution 14. Therefore, the oxidation effect caused by the dissolved oxygen in the solution 14 is reduced, and it is easy to maintain the state where the ratio of divalent iron ions in the solution 14 increases. The degassing promotion mechanism 75 in this example is provided at the top 15a.

[0200] Instead of reducing the pressure of the gas in contact with the solution 14, the degassing promotion mechanism 75 may also blow a gas other than oxygen in such a way as to reduce the partial pressure of oxygen in the above gas. Such a gas is, for example, nitrogen.

[0201] Embodiment 6

[0202] 〔Carbon dioxide recovery device〕

[0203] Although not shown in the drawings, the carbon dioxide recovery device of the sixth embodiment is a temperature and pressure control device that adjusts the temperature of the solution and the partial pressure of carbon dioxide by a dissolution promotion mechanism. In addition, the dissolution promotion mechanism may further include a temperature and pressure control device based on the above-described bubble generation device.

[0204] The lower limit of the partial pressure of carbon dioxide in the gas supplied from the gas supply unit to the storage tank is, for example, 4.0×10 -5 MPa, 6.0×10 -5 MPa, or 8.0×10 -5 MPa. By having the above partial pressure of 4.0×10 -5 MPa or more, it is easy to improve the capture efficiency of carbonate ions and the like based on the carbon dioxide capture material. The upper limit of the above partial pressure is not particularly limited. The upper limit of the above partial pressure is, for example, 1.0×10 -1 MPa. That is, the above partial pressure is, for example, 4.0×10 -5 MPa or more and 1.0×10 -1 MPa or less, 6.0×10 -5 MPa or more and 1.0×10 -1 MPa or less, or 8.0×10 -5 MPa or more and 1.0×10 -1 MPa or less.

[0205] The upper limit of the temperature of the solution is, for example, 99°C or 95°C. By having the above temperature of 99°C or less, it is easy to process the solution. The lower limit of the above temperature is, for example, 25°C, 50°C, 70°C, or 90°C. By having the above temperature of 25°C or more, it is easy to improve the capture efficiency of carbonate ions and the like based on the carbon dioxide capture material. That is, the above temperature is, for example, 25°C or more and 99°C or less, 50°C or more and 99°C or less, 70°C or more and 99°C or less, 90°C or more and 99°C or less, or 90°C or more and 95°C or less.

[0206] As mentioned above, multiple embodiments of the present invention have been described by way of example. The present invention is not limited to these examples, and is represented by the scope of the claims, and is intended to include the same meaning as the scope of the claims and all changes within the scope. The modes of each part described in each embodiment can also be combined with or replaced by the modes described in other embodiments and used.

[0207] Explanation of reference numerals

[0208] 100: Carbon dioxide recovery device;

[0209] 1: Carbon dioxide capture module;

[0210] 11: First electrode; 11a: Electrode substrate; 11b: Electrode sheet;

[0211] 111: Carbon dioxide capture material; 12: Second electrode; 13: Magnet;

[0212] 14: Solution; 15: Storage tank; 15a: Top; 15b: Bottom;

[0213] 15c: Side wall part; 15d: Supply port; 15e: Discharge port; 151: Gas phase part;

[0214] 16: Gas supply part; 16a: Carbon dioxide tank; 16b: First pipe;

[0215] 16c: Second pipe; 16d: Pump; 161: Carbon dioxide;

[0216] 17: Voltage application mechanism; 17a: Power supply; 17b, 17c: Wires;

[0217] 18: Sensor part; 19: Capture control part; 20: Recovery request input part;

[0218] 21: Money acceptance part; 21a: Banknote insertion slot; 21b: Coin insertion slot;

[0219] 21c: Reading part; 211: Money; 22: Capture material acceptance part;

[0220] 22a: Capture material insertion slot; 23: Capture material supply part; 24: Capture material insertion mechanism;

[0221] 24a: Chute; 25: Recovery result output part; 26: Item providing part;

[0222] 26a: Take-out port; 27: Item; 28: Card; 28a: QR code;

[0223] 29: Recovery control part; 30: Display output part; 31: Inspection port;

[0224] 32: Operation input part; 40: Housing; 50: Capture material providing device;

[0225] 51: Processing part; 51a: Insertion port; 511: Processing member;

[0226] 52: Money acceptance part; 52a: Banknote insertion slot; 52b: Coin insertion slot;

[0227] 53: Capture material supply unit; 54: Supply unit; 54a, 54b: Outlet

[0228] 55: Control unit; 56: Display output unit; 58: Housing; 60: Captured product

[0229] 70: Dissolution promotion mechanism; 71: Solution adjustment mechanism; 72: Carbonation promoter

[0230] 73: Porous membrane; 74: Display mechanism; 75: Degassing promotion mechanism

Claims

1. A carbon dioxide capture module, in, The carbon dioxide capture module comprises: a first electrode; a second electrode; A solution for impregnation of the first electrode and the second electrode; a gas supply unit for supplying carbon dioxide to the solution; and a voltage applying mechanism for applying a voltage between the first electrode and the second electrode, The first electrode has a carbon dioxide capture material containing a first metal having iron as a main component, The second electrode includes a second metal or carbon having an ionization tendency smaller than that of the first metal.

2. The carbon dioxide capture module according to claim 1, in, The voltage is greater than or equal to 1 mV and less than or equal to 2 V.

3. The carbon dioxide capture module according to claim 1 or 2, in, The carbon dioxide capture material is a powder compact including powder composed of the first metal, or a sintered body composed of the first metal.

4. The carbon dioxide capture module according to claim 3, in, The average particle size of the powder is 1 μm or more and 2000 μm or less.

5. The carbon dioxide capture module according to any one of claims 1 to 4, in, The first electrode has: an electrode substrate composed of a metal or carbon having an ionization tendency smaller than that of the first metal; and The electrode sheet is arranged on the surface of the electrode substrate. The electrode sheet is the carbon dioxide capturing material.

6. The carbon dioxide capture module according to claim 5, in, The carbon dioxide capture module further includes a magnet provided to bring the carbon dioxide capture material into contact with the electrode substrate.

7. The carbon dioxide capture module according to claim 5, in, The electrode substrate is a mesh-shaped member on which the electrode sheet is placed.

8. A carbon dioxide capture module according to any one of claims 1 to 7, in, The carbon dioxide capture module also has: a sensor unit that detects at least one selected from the group consisting of a carbon dioxide concentration of the solution, a temperature of the solution, a pH value of the solution, a turbidity of the solution, an amount of a capture product generated by the carbon dioxide capture module, a voltage value between the first electrode and the second electrode, and a current value flowing between the first electrode and the second electrode; as well as The capture control unit controls the operation of the voltage applying mechanism based on the detection result of the sensor unit.

9. A carbon dioxide capture module according to any one of claims 1 to 8, in, The temperature of the solution is 4°C or higher and lower than 200°C.

10. A carbon dioxide capture module according to any one of claims 1 to 9, in, The pH of the solution is greater than 0 and less than 12.

11. A carbon dioxide capture module according to any one of claims 1 to 10, in, The solution comprises water.

12. The carbon dioxide capture module according to claim 11, in, The solution further comprises at least one selected from the group consisting of an acidic substance, a dissolution accelerator, a pH buffer, a carbonization accelerator, a reducing agent, a metal ion chelating agent, and a builder.

13. A carbon dioxide capture module according to any one of claims 1 to 12, in, The second metal is copper or platinum.

14. A carbon dioxide recovery device, in, The carbon dioxide recovery device comprises: A carbon dioxide capture module as claimed in any one of claims 1 to 13; Recycling request input unit; A recovery result output unit; and Recycling Control Department, The recovery control unit causes the recovery result of the carbon dioxide capture module to be outputted through the recovery result output unit based on the recovery request from the recovery request input unit.

15. The carbon dioxide recovery device according to claim 14, in, The collection result output unit includes an item providing unit that provides items corresponding to the collection result. The article has a capture product generated by the carbon dioxide capture module.

16. The carbon dioxide recovery device according to claim 15, in, The article is a composite material comprising the captured product and a resin in which the captured product is embedded.

17. The carbon dioxide recovery device according to claim 15 or 16, in, The article has a one-dimensional code or a two-dimensional code indicating operation information including the collection result.

18. The carbon dioxide recovery device according to any one of claims 14 to 17, in, The carbon dioxide recovery device further includes a capturing material input mechanism that inputs the carbon dioxide capturing material into the carbon dioxide capturing module.

19. The carbon dioxide recovery device according to claim 18, in, The carbon dioxide recovery device further comprises a capture material supply device, the capture material supply device supplies the carbon dioxide capture material. The capturing material providing device is provided independently from the capturing material input mechanism.

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