Carbon dioxide capture apparatus, carbon dioxide capture method, and carbon dioxide capture program

Abstract

To provide a carbon dioxide capture apparatus, a carbon dioxide capture method, and a carbon dioxide capture program capable of improving cooling efficiency.SOLUTION: A carbon dioxide capture apparatus 1 according to the present disclosure includes: a first apparatus 100 including a first adsorbent 110 that adsorbs at least a part of carbon dioxide contained in outside air to be processed; a second apparatus 200 including a second adsorbent 210 that adsorbs at least a part of carbon dioxide contained in the outside air; and an exhaust path 300 that allows the first apparatus 100 to communicate with the second apparatus 200. In the carbon dioxide capture apparatus 1, the outside air that has passed through the first apparatus 100 in such a way that at least a part of carbon dioxide is adsorbed by the first adsorbent 110 passes through the second apparatus 200 via the exhaust path 300 so as to cool the second adsorbent 210.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a carbon dioxide capture device, a carbon dioxide capture method, and a carbon dioxide capture program. [Background technology]

[0002] Patent Document 1 discloses a carbon dioxide recovery device that heats or cools a stacked carbon dioxide (CO2) adsorbent material by providing a heat transfer medium flow passage that penetrates the CO2 adsorbent material. The heat transfer medium in Patent Document 1 is not in direct contact with the CO2 adsorbent material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-013167 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, cooling water is used as a means for cooling the CO2 adsorbent, but an additional power source such as a pump is required to circulate this cooling water, which reduces the CO2 capture efficiency relative to the required energy. A device that improves cooling efficiency is desired.

[0005] The present disclosure has been made to solve such problems, and aims to provide a carbon dioxide capture device, a carbon dioxide capture method, and a carbon dioxide capture program that can improve the cooling efficiency of CO2 adsorbent materials. [Means for solving the problem]

[0006] A carbon dioxide recovery apparatus according to one embodiment of the present disclosure is a carbon dioxide recovery apparatus comprising: a first device including a first adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air to be treated; a second device including a second adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air; and an exhaust passage connecting the first device and the second device, wherein the outside air that has passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent passes through the second device via the exhaust passage so as to cool the second adsorbent.

[0007] In the carbon dioxide capture device, the first adsorbent and the second adsorbent may be disposed inside a cylindrical container, the first device may have one or more cylindrical containers containing the first adsorbent, the second device may have one or more cylindrical containers containing the second adsorbent, the outside air passing through the interior of the cylindrical container may have at least a portion of the carbon dioxide adsorbed therein, and the outside air passing around the outer periphery of the cylindrical container may cool the second adsorbent.

[0008] In the carbon dioxide capture device, the first device may include a first inlet through which the outside air passing through the interior of the cylindrical container flows in, a first outlet through which the outside air passing through the interior of the cylindrical container is discharged, a first inlet through which the outside air passing through the outer periphery of the cylindrical container is introduced, and a first outlet through which the outside air passing through the outer periphery of the cylindrical container is discharged, and the second device may include a second inlet through which the outside air passing through the interior of the cylindrical container flows in, a second outlet through which the outside air passing through the interior of the cylindrical container is discharged, a second inlet through which the outside air passing through the outer periphery of the cylindrical container is introduced, and a second outlet through which the outside air passing through the outer periphery of the cylindrical container is discharged.

[0009] The carbon dioxide capture device may further include a plurality of on-off valves provided in the first device, the second device, and the exhaust passage, and a control unit that switches from a first state to a second state by controlling the plurality of on-off valves, the temperature increase of the first adsorbent, and the temperature increase of the second adsorbent, wherein in the first state, the outside air that has passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent passes through the second device via the exhaust passage so as to cool the second adsorbent, and in the second state, the temperature of the first adsorbent is increased to desorb the carbon dioxide from the first adsorbent and release it to the outside.

[0010] The carbon dioxide capture device may further include a control unit that switches between a first state and a third state by controlling a plurality of on-off valves provided in the first device, the second device, and the exhaust passage, and the plurality of on-off valves, the temperature increase of the first adsorbent, and the temperature increase of the second adsorbent, wherein in the first state, the outside air that has passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent passes through the second device via the exhaust passage so as to cool the second adsorbent, and in the third state, the outside air that has passed through the second device so that at least a portion of the carbon dioxide is adsorbed by the second adsorbent passes through the first device via the exhaust passage so as to cool the first adsorbent.

[0011] In the carbon dioxide capture device, the control unit may switch from the first state to the second state and then switch to the third state, switch from the third state to the fourth state and then switch to the first state, and in the second state, heat the first adsorbent to desorb the carbon dioxide from the first adsorbent and release it to the outside, and in the fourth state, heat the second adsorbent to desorb the carbon dioxide from the second adsorbent and release it to the outside.

[0012] In the carbon dioxide recovery device, the exhaust passage includes a first exhaust passage through which the outside air flows from the first device to the second device, and a second exhaust passage through which the outside air flows from the second device to the first device, and the first exhaust passage and the second exhaust passage may include portions that are connected to the first device and the second device from different directions.

[0013] In the carbon dioxide capture device, the first device includes a first inlet through which the outside air flows in, a first outlet through which the outside air flowing in from the first inlet is discharged, a first inlet through which the outside air discharged from the second device is introduced, and a first outlet through which the outside air introduced from the first inlet is discharged to the outside; the second device includes a second inlet through which the outside air flows in, a second outlet through which the outside air flowing in from the second inlet is discharged, a second inlet through which the outside air discharged from the first device is introduced, and a second outlet through which the outside air introduced from the second inlet is discharged to the outside; and the exhaust passage includes a common space arranged between the first device and the second device, a first outlet space arranged between the common space and the first outlet, a first introduction space arranged between the common space and the first inlet, and a first space between the common space and the second outlet. and a second discharge space disposed between the common space and the second inlet, and a second introduction space disposed between the common space and the second inlet, wherein the plurality of on-off valves include a first inlet valve that opens and closes the first inlet, a first discharge valve that opens and closes between the common space and the first discharge space, a first introduction valve that opens and closes between the common space and the first introduction space, a second inlet valve that opens and closes between the second inlet, a second discharge valve that opens and closes between the common space and the second discharge space, and a second introduction valve that opens and closes between the common space and the second introduction space, wherein the first discharge valve, the first introduction valve, the second discharge valve, and the second introduction valve are provided in the exhaust passage, and the first exhaust passage includes the first discharge space, the common space, and the second introduction space, which are all connected to each other, and the second exhaust passage includes the second discharge space, the common space, and the first introduction space, which are all connected to each other.

[0014] The carbon dioxide capture device may further include a first detachment valve that opens and closes between the first discharge space and the outside, and a second detachment valve that opens and closes between the second discharge space and the outside.

[0015] In the carbon dioxide recovery device, an outlet for discharging the outside air to the outside may be arranged on the opposite side of the inlet in the second device that is connected to the first exhaust passage, and an inlet through which the outside air flows in from the outside may be arranged on the opposite side of the exhaust port in the second device that is connected to the second exhaust passage.

[0016] A carbon dioxide capture method according to one embodiment of the present disclosure is a carbon dioxide capture method using a carbon dioxide capture apparatus having a first device including a first adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air to be treated, a second device including a second adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air, and an exhaust passage connecting the first device and the second device, and includes a first adsorption step of passing the outside air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent, and a first cooling step of passing the outside air through the second device via the exhaust passage so that the outside air that has passed through the first device in the first adsorption step cools the second adsorbent.

[0017] A carbon dioxide capture program according to one embodiment of the present disclosure is a carbon dioxide capture program using a carbon dioxide capture apparatus including: a first device including a first adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air to be treated; a second device including a second adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air; an exhaust passage connecting the first device and the second device; a plurality of on-off valves provided in the first device, the second device, and the exhaust passage; and a control unit that controls the plurality of on-off valves, the heating of the first adsorbent, and the heating of the second adsorbent, and causes a computer to execute a first adsorption process of passing the outside air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent; and a first cooling process of passing the outside air through the second device via the exhaust passage so that the outside air that has passed through the first device in the first adsorption process cools the second adsorbent. [Effects of the Invention]

[0018] The present disclosure makes it possible to provide a carbon dioxide capture device, a carbon dioxide capture method, and a carbon dioxide capture program that can improve cooling efficiency. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a cross-sectional view illustrating a carbon dioxide capture device according to a first embodiment, showing a first step in the carbon dioxide capture device 1. FIG. [Figure 2] 2 is a cross-sectional view illustrating the carbon dioxide capture device according to the first embodiment, showing a second step in the carbon dioxide capture device 1. FIG. [Figure 3] 3 is a cross-sectional view illustrating the carbon dioxide capture device according to the first embodiment, showing a third step in the carbon dioxide capture device 1. FIG. [Figure 4] 4 is a cross-sectional view illustrating the carbon dioxide capture device according to the first embodiment, showing a fourth step in the carbon dioxide capture device 1. FIG. [Figure 5] 1 is a perspective view illustrating a first adsorbent in a carbon dioxide capture device according to a first embodiment. FIG. [Figure 6]FIG. 1 is a flow chart illustrating a carbon dioxide capture method using a carbon dioxide capture device according to a first embodiment. [Figure 7] 1 is a block diagram illustrating a control unit including a computer in a carbon dioxide capture device according to first and second embodiments. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] Specific configurations of the present embodiment will be described below with reference to the drawings. The following description illustrates preferred embodiments of the present disclosure, and the scope of the present disclosure is not limited to the following embodiments. Furthermore, not all of the configurations described in the present embodiment are necessarily essential means for solving the problems. For clarity of explanation, the following description and drawings have been omitted and simplified as appropriate. In each drawing, the same elements are assigned the same reference numerals, and duplicate explanations are omitted as necessary.

[0021] (Embodiment 1) A carbon dioxide capture apparatus and a carbon dioxide capture method according to a first embodiment will be described. FIGS. 1 to 4 are cross-sectional views illustrating the carbon dioxide capture apparatus 1 according to the first embodiment. FIGS. 1 to 4 respectively show a first step, a second step, a third step, and a fourth step in the carbon dioxide capture apparatus 1. The first step includes a first adsorption step and a first cooling step. The second step includes a first heating step and a first desorption step. The third step includes a second adsorption step and a second cooling step. The fourth step includes a second heating step and a second desorption step. The state of the first step is referred to as the first state. The state of the second step is referred to as the second state. The state of the third step is referred to as the third state. The state of the fourth step is referred to as the fourth state. As shown in FIGS. 1 to 4, the carbon dioxide capture apparatus 1 includes a first device 100, a second device 200, an exhaust passage 300, a plurality of on-off valves 140, and a control unit 400.

[0022] <1st device> The first device 100 includes a first adsorbent 110. The first adsorbent 110 adsorbs at least a portion of the carbon dioxide contained in the outside air to be treated. The first device 100 has a housing 101. The housing 101 in the first device 100 includes a first inlet 111, a first outlet 112, a first introduction port 113, and a first discharge port 114.

[0023] The first inlet 111 is an opening through which outside air to be treated flows in. The first outlet 112 is an opening through which the outside air that has flowed in from the first inlet 111 is discharged. The first introduction port 113 is an opening through which the outside air discharged from the second device 200 is introduced via the exhaust passage 300. The first discharge port 114 is an opening through which the outside air that has been introduced from the first introduction port 113 is discharged to the outside. A fan may be disposed outside the first inlet 111. This allows the outside air to be taken into the first device 100 from the first inlet 111.

[0024] <Second device> The second device 200 includes a second adsorbent 210. The second adsorbent 210 adsorbs at least a portion of the carbon dioxide contained in the outside air to be treated. The second device 200 has a housing 201. The housing 201 in the second device 200 includes a second inlet 211, a second outlet 212, a second introduction port 213, and a second discharge port 214.

[0025] The second inlet 211 is an opening through which outside air to be treated flows in. The second outlet 212 is an opening through which the outside air that has flowed in from the second inlet 211 is discharged. The second introduction port 213 is an opening through which the outside air discharged from the first device 100 is introduced via the exhaust passage 300. The second discharge port 214 is an opening through which the outside air that has been introduced from the second introduction port 213 is discharged to the outside. A fan may be disposed outside the second inlet 211. This allows the outside air to be taken into the second device 200 from the second inlet 211.

[0026] <Exhaust passage> The exhaust passage 300 connects the first device 100 and the second device 200. As a result, the outside air that has passed through the first device 100 so that at least a portion of the carbon dioxide contained in the outside air is adsorbed by the first adsorbent 110 passes through the second device 200 via the exhaust passage 300 so as to cool the second adsorbent 210. Furthermore, the outside air that has passed through the second device 200 so that at least a portion of the carbon dioxide contained in the outside air is adsorbed by the second adsorbent 210 passes through the first device 100 via the exhaust passage 300 so as to cool the first adsorbent 110.

[0027] The exhaust passage 300 includes a first exhaust passage 301 (see FIG. 1) and a second exhaust passage 302 (see FIG. 3). The first exhaust passage 301 is a passage through which outside air flows from the first device 100 to the second device 200. The second exhaust passage 302 is a passage through which outside air flows from the second device 200 to the first device 100. The first exhaust passage 301 and the second exhaust passage 302 include portions that communicate with the first device 100 and the second device 200 from different directions.

[0028] A first outlet 114 for discharging outside air to the outside is arranged on the opposite side of the first inlet 113 in the first device 100 that is connected to the second exhaust passage 302. A first inlet 111 for allowing outside air to flow in from the outside is arranged on the opposite side of the first outlet 112 in the first device 100 that is connected to the first exhaust passage 301. A second outlet 214 for discharging outside air to the outside is arranged on the opposite side of the second inlet 213 in the second device 200 that is connected to the first exhaust passage 301. A second inlet 211 for allowing outside air to flow in from the outside is arranged on the opposite side of the second outlet 212 in the second device 200 that is connected to the second exhaust passage 302.

[0029] The exhaust passage 300 also includes a common space 310, a first exhaust space 321, a first introduction space 331, a second exhaust space 322, and a second introduction space 332. The common space 310 is disposed between the first device 100 and the second device 200. The first exhaust space 321 is disposed between the common space 310 and the first exhaust port 112. The first introduction space 331 is disposed between the common space 310 and the first introduction port 113. The second exhaust space 322 is disposed between the common space 310 and the second exhaust port 212. The second introduction space 332 is disposed between the common space 310 and the second introduction port 213.

[0030] Therefore, the first exhaust passage 301 includes a first exhaust space 321, a common space 310, and a second introduction space 332. The second exhaust passage 302 includes a second exhaust space 322, a common space 310, and a first introduction space 331.

[0031] <Open / close valve> The multiple on-off valves 140 include a first inlet valve 141, a first outlet valve 142, a first introduction valve 143, a first detachment valve 145, a second inlet valve 241, a second outlet valve 242, a second introduction valve 243, and a second detachment valve 245. The first inlet valve 141 opens and closes the first inlet 111. The first outlet valve 142 opens and closes between the common space 310 and the first outlet space 321. The first introduction valve 143 opens and closes between the common space 310 and the first introduction space 331. The first detachment valve 145 opens and closes between the first outlet space 321 and the outside. The second inlet valve 241 opens and closes the second inlet 211. The second outlet valve 242 opens and closes between the common space 310 and the second outlet space 322. The second inlet valve 243 opens and closes between the common space 310 and the second inlet space 332. The second detachment valve 245 opens and closes between the second outlet space 322 and the outside.

[0032] The plurality of opening and closing valves 140 are provided in the first device 100, the second device 200, and the exhaust passage 300. Of the plurality of opening and closing valves 140, a first inlet valve 141, a first outlet valve 142, a first introduction valve 143, and a first detachment valve 145 are provided in the first device 100. Of the plurality of opening and closing valves 140, a second inlet valve 241, a second outlet valve 242, a second introduction valve 243, and a second detachment valve 245 are provided in the second device 200.

[0033] Furthermore, of the multiple on-off valves 140, the first exhaust valve 142, the first introduction valve 143, the second exhaust valve 242, and the second introduction valve 243 are provided in the exhaust passage 300. Therefore, the exhaust passage 300 includes the first exhaust valve 142, the first introduction valve 143, the second exhaust valve 242, and the second introduction valve 243 out of the multiple on-off valves 140.

[0034] In this case, the first exhaust passage 301 includes a first exhaust space 321, a common space 310, and a second introduction space 332 that are connected by opening the first exhaust valve 142 and the second introduction valve 243. In this case, the second exhaust valve 242 and the first introduction valve 143 are closed. The second exhaust passage 302 includes a second exhaust space 322, a common space 310, and a first introduction space 331 that are connected by opening the second exhaust valve 242 and the first introduction valve 143. In this case, the first exhaust valve 142 and the second introduction valve 243 are closed.

[0035] In this way, a plurality of on-off valves 140 are provided in the first exhaust passage 301 and the second exhaust passage 302. Each of the plurality of on-off valves 140 includes a drive unit so as to be able to open and close a predetermined passage.

[0036] <1st adsorbent, 2nd adsorbent> Fig. 5 is a perspective view illustrating the first adsorbent 110 in the carbon dioxide capture device 1 according to the first embodiment. Fig. 5 also shows an enlarged view of one cylindrical container 120. Although Fig. 5 shows the first adsorbent 110, the second adsorbent 210 is similar. Therefore, the description of the first adsorbent 110 in the first device 100 will be substituted for the description of the second adsorbent 210 in the second device 200. As shown in Fig. 5, the first adsorbent 110 may be disposed inside 121 of the cylindrical cylindrical container 120.

[0037] The first device 100 has one or more cylindrical containers 120 containing a first adsorbent 110. The second device 200 has one or more cylindrical containers 120 containing a second adsorbent 210. Outside air passing through the interior 121 of the cylindrical container 120 adsorbs at least a portion of the carbon dioxide. Outside air passing through the outer periphery 122 of the cylindrical container 120 cools the first adsorbent 110 and the second adsorbent 210.

[0038] The outer peripheral surface of the cylindrical container 120 is preferably formed with a covering member so that the interior 121 is isolated from the outer periphery 122. The covering member may include, for example, resin, metal, etc. Fins, shot blasting, etc. may be provided on the outer peripheral surface to increase the contact area between the outside air that has passed through the outer periphery 122 and the cylindrical container 120 and improve cooling performance.

[0039] A plurality of cylindrical cylindrical containers 120 are disposed inside the housing 101 of the first device 100. Note that a single cylindrical container 120 may be disposed inside the housing 101 of the first device 100. In the following description, it is assumed that a plurality of cylindrical containers 120 are disposed in the first device 100. The plurality of cylindrical cylindrical containers 120 are disposed between the first inlet 111 and the first outlet 112. For example, the plurality of cylindrical containers 120 are disposed so that the central axes of the cylindrical containers 120 extend in a direction from the first inlet 111 to the first outlet 112. A shielding plate 111a may be disposed at the first inlet 111. One end of the cylindrical container 120 penetrates the shielding plate 111a. Furthermore, a shielding plate 112a may be disposed at the first outlet 112. The other end of the cylindrical container 120 penetrates the shielding plate 112a.

[0040] With this configuration, the outside air flowing in from the first inlet 111 can pass through the interior 121 of the cylindrical container 120. On the other hand, the outside air flowing in from the first inlet 111 can be prevented from passing through the outer periphery 122 of the cylindrical container 120. Furthermore, the outside air introduced from the first introduction port 113 can pass through the outer periphery 122 of the cylindrical container 120. On the other hand, the outside air introduced from the first introduction port 113 can be prevented from passing through the interior 121 of the cylindrical container 120.

[0041] In this way, the first inlet 111 may be an opening into which outside air passing through the interior of the cylindrical container 120 flows in. The first outlet 112 may be an opening from which outside air passing through the interior of the cylindrical container 120 is discharged. The first introduction port 113 may be an opening from which outside air passing through the outer periphery of the cylindrical container 120 is introduced. The first discharge port 114 may be an opening from which outside air passing through the outer periphery of the cylindrical container 120 is discharged.

[0042] Similarly, the second inlet 211 may be an opening through which outside air passing through the interior of the cylindrical container 120 flows in. The second outlet 212 may be an opening through which outside air passing through the interior of the cylindrical container 120 is discharged. The second inlet 213 may be an opening through which outside air passing through the outer periphery of the cylindrical container 120 is introduced. The second outlet 214 may be an opening through which outside air passing through the outer periphery of the cylindrical container 120 is discharged.

[0043] The first adsorbent 110 and the second adsorbent 210 may include, for example, a direct air capture (DAC) member. The interior of the cylindrical container 120 may include a DAC configured in a honeycomb structure. This increases the surface area that comes into contact with the outside air.

[0044] The cylindrical container 120 may include a heating element 123. The heating element 123 may be an electrode that applies a current to the first adsorbent 110 and the second adsorbent 210. The heating element 123 applies a current to the first adsorbent 110 and the second adsorbent 210, thereby raising the temperatures of the first adsorbent 110 and the second adsorbent 210. Note that the heating element 123 is not limited to an electrode, and may be a heater or the like, as long as it can raise the temperatures of the first adsorbent 110 and the second adsorbent 210. By raising the temperatures of the first adsorbent 110 and the second adsorbent 210, the carbon dioxide adsorbed to the first adsorbent 110 and the second adsorbent 210 can be desorbed.

[0045] In this way, the carbon dioxide capture device 1 of this embodiment may use DAC using a temperature swing as the first adsorbent 110 and the second adsorbent 210. In this case, it is necessary to cool the first adsorbent 110 and the second adsorbent 210 after the temperature is raised.

[0046] Generally, there are many methods for cooling the first adsorbent 110 and the second adsorbent 210, such as water cooling using a water cooling device or air cooling using an air cooling device, but all of these methods require additional power. In contrast, in this embodiment, the outside air that has passed through the first device 100 to be adsorbed by the first adsorbent 110 in the interior 121 of the cylindrical container 120 passes through the second device 200 to cool the outer periphery 122 of the cylindrical container 120 containing the second adsorbent 210. In other words, by discharging the exhaust air during adsorption through the cylindrical container 120, which requires cooling, the adsorbent can be cooled without using additional power.

[0047] Furthermore, an exhaust passage is formed around the cylindrical container 120 containing the first adsorbent 110 and the second adsorbent 210, allowing for air insulation. This reduces the heat transfer path from the first adsorbent 110 and the second adsorbent 210 when carbon dioxide is desorbed by increasing the temperature of the first adsorbent 110 and the second adsorbent 210. This reduces heat loss.

[0048] <Control unit> The control unit 400 is connected to the plurality of on-off valves 140 via a communication line including at least one of wired and wireless communication lines in a state capable of transmitting an operation signal to the plurality of on-off valves 140. In this way, the control unit 400 controls the opening and closing of the plurality of on-off valves 140. The control unit 400 is also connected to the heating member 123 in a state capable of transmitting an operation signal to the heating member 123, which heats the first adsorbent 110 and the second adsorbent 210. In this way, the control unit 400 controls the heating of the first adsorbent 110 and the second adsorbent 210. Furthermore, the control unit 400 is connected to the fans that introduce outside air into the first device 100 and the second device 200 in a state capable of transmitting an operation signal to the fans. In this way, the control unit 400 controls the fans.

[0049] The control unit 400 switches from the first state to the second state by controlling the multiple on-off valves 140, the temperature rise of the first adsorbent 110, and the temperature rise of the second adsorbent 210. The control unit 400 also switches from the first state to the second state and then to the third state by controlling the multiple on-off valves 140, the temperature rise of the first adsorbent 110, and the temperature rise of the second adsorbent 210. The control unit 400 may then switch from the third state to the fourth state and then back to the first state. The control unit 400 may cycle through the first state to the fourth state. In this manner, the control unit 400 may switch between the first state and the third state by controlling the multiple on-off valves 140, the temperature rise of the first adsorbent 110, and the temperature rise of the second adsorbent 210.

[0050] The control unit 400 may use various parameters as the timing for switching between the processes. For example, the control unit 400 may switch between the processes based on time, or may switch between the processes based on a monitored temperature. Furthermore, the control unit 400 may switch between the processes based on a monitored carbon dioxide concentration of a predetermined component, or may switch between the processes based on the flow rate of the gas flowing into the first inlet 111 and the second inlet 211.

[0051] In the first state, the control unit 400 opens the first inlet valve 141, the first outlet valve 142, and the second inlet valve 243. On the other hand, in the first state, the control unit 400 closes the first inlet valve 143, the first desorption valve 145, the second inlet valve 241, the second outlet valve 242, and the second desorption valve 245. As a result, in the first state, the outside air that has passed through the first device 100 so that at least a portion of the carbon dioxide in the outside air is adsorbed by the first adsorbent 110 passes through the exhaust passage 300 and the second device 200 so as to cool the second adsorbent 210. For example, the outside air that has passed through the interior 121 of the cylindrical container 120 in the first device 100 passes through the outer periphery 122 of the cylindrical container 120 in the second device 200 via the first exhaust passage 301.

[0052] In the second state, the control unit 400 opens the first desorption valve 145. On the other hand, in the second state, the control unit 400 closes the first inlet valve 141, the first outlet valve 142, the first introduction valve 143, the second inlet valve 241, the second outlet valve 242, the second introduction valve 243, and the second desorption valve 245. The control unit 400 also raises the temperature of the first adsorbent 110. As a result, in the second state, the control unit 400 raises the temperature of the first adsorbent 110 to desorb carbon dioxide from the first adsorbent 110 and release it to the outside.

[0053] In the third state, the control unit 400 opens the second inlet valve 241, the second outlet valve 242, and the first introduction valve 143. On the other hand, in the third state, the control unit 400 closes the second introduction valve 243, the second desorption valve 245, the first inlet valve 141, the first outlet valve 142, and the first desorption valve 145. As a result, in the third state, the outside air that has passed through the second device 200 so that at least a portion of the carbon dioxide in the outside air is adsorbed by the second adsorbent 210 passes through the first device 100 via the exhaust passage 300 to cool the first adsorbent 110. For example, the outside air that has passed through the interior 121 of the cylindrical container 120 in the second device 200 passes through the outer periphery 122 of the cylindrical container 120 in the first device 100 via the second exhaust passage 302.

[0054] In the fourth state, the control unit 400 opens the second desorption valve 245. On the other hand, in the fourth state, the control unit 400 closes the first inlet valve 141, the first outlet valve 142, the first introduction valve 143, the first desorption valve 145, the second inlet valve 241, the second outlet valve 242, and the second introduction valve 243. The control unit 400 also raises the temperature of the second adsorbent 210. As a result, in the fourth state, the control unit 400 raises the temperature of the second adsorbent 210 to desorb carbon dioxide from the second adsorbent 210 and release it to the outside.

[0055] <Carbon dioxide capture method> Next, a carbon dioxide capture method using the carbon dioxide capture apparatus 1 of this embodiment will be described. Fig. 6 is a flow chart illustrating a carbon dioxide capture method using the carbon dioxide capture apparatus 1 according to embodiment 1. As shown in Fig. 6, the carbon dioxide capture method of this embodiment includes a first step (step S10), a first switching step (step S15), a second step (step S20), a second switching step (step S25), a third step (step S30), a third switching step (step S35), a fourth step (step S40), a determination step (step S44), and a fourth switching step (step S45).

[0056] <1st process> As shown in FIGS. 1 and 6 , the first step includes a first adsorption step (step S11) and a first cooling step (step S12). In the first adsorption step, outside air is passed through the first device 100 so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent 110. In the first adsorption step, the outside air that has passed through the interior 121 of the cylindrical container 120 may adsorb at least a portion of the carbon dioxide. In the first cooling step, the outside air that has passed through the first device 100 in the first adsorption step is passed through the second device 200 via the exhaust passage 300 so that the outside air cools the second adsorbent 210. In the first cooling step, the outside air that has passed through the outer periphery 122 of the cylindrical container 120 cools the second adsorbent 210.

[0057] The first switching step switches from the first step to the second step by controlling the multiple on-off valves 140 and the temperature rise. For example, the control unit 400 opens the first desorption valve 145. Meanwhile, the control unit 400 closes the first inlet valve 141, the first outlet valve 142, the first introduction valve 143, the second inlet valve 241, the second outlet valve 242, the second introduction valve 243, and the second desorption valve 245. The control unit 400 also sends an operation signal to raise the temperature of the first adsorbent 110. In this way, the control unit 400 switches from the first step to the second step.

[0058] <Second process> 2 and 6, the second step includes a first temperature-raising step (step S21) and a first desorption step (step S22). The first temperature-raising step raises the temperature of the first adsorbent 110. This allows carbon dioxide to be desorbed from the first adsorbent 110. The first desorption step desorbs carbon dioxide from the first adsorbent 110 and releases it to the outside.

[0059] The second switching step switches from the second step to the third step by controlling the multiple on-off valves 140 and the temperature rise. For example, the control unit 400 opens the second inlet valve 241, the second outlet valve 242, and the first introduction valve 143. Meanwhile, the control unit 400 closes the second introduction valve 243, the second desorption valve 245, the first inlet valve 141, the first outlet valve 142, and the first desorption valve 145. The control unit 400 also sends an operation signal to stop heating the first adsorbent 110. In this way, the control unit 400 switches from the second step to the third step.

[0060] <3rd process> As shown in FIGS. 3 and 6 , the third step includes a second adsorption step (step S31) and a second cooling step (step S32). In the third adsorption step, outside air is passed through the second device 200 so that at least a portion of the carbon dioxide is adsorbed by the second adsorbent 210. In the second adsorption step, the outside air that has passed through the interior 121 of the cylindrical container 120 may adsorb at least a portion of the carbon dioxide. In the second cooling step, the outside air that has passed through the second device 200 in the second adsorption step is passed through the first device 100 via the exhaust passage 300 so that the outside air cools the first adsorbent 110. In the second cooling step, the outside air that has passed through the outer periphery 122 of the cylindrical container 120 cools the first adsorbent 110.

[0061] The third switching step switches from the third step to the fourth step by controlling the multiple on-off valves 140 and the temperature rise. For example, the control unit 400 opens the second desorption valve 245. Meanwhile, the control unit 400 closes the first inlet valve 141, the first outlet valve 142, the first introduction valve 143, the first desorption valve 145, the second inlet valve 241, the second outlet valve 242, and the second introduction valve 243. The control unit 400 also sends an operation signal to raise the temperature of the second adsorbent 210. In this way, the control unit 400 switches from the third step to the fourth step.

[0062] <4th process> 4 and 6, the fourth step includes a second temperature-raising step (step S41) and a second desorption step (step S42). The second temperature-raising step raises the temperature of the second adsorbent 210. This allows carbon dioxide to be desorbed from the second adsorbent 210. The second desorption step desorbs carbon dioxide from the second adsorbent 210 and releases it to the outside.

[0063] In the determination step (step S44), it is determined whether or not to end the process. If it is determined that the process should be ended (in the case of Yes), the process ends. On the other hand, if the process should not be ended (in the case of No), the process proceeds to the fourth switching step.

[0064] The fourth switching step switches from the fourth step to the first step. For example, the control unit 400 opens the first inlet valve 141, the first outlet valve 142, and the second inlet valve 243. Meanwhile, the control unit 400 closes the first inlet valve 143, the first desorption valve 145, the second inlet valve 241, the second outlet valve 242, and the second desorption valve 245. The control unit 400 also sends an operation signal to stop heating the second adsorbent 210. In this way, the control unit 400 switches from the fourth step to the first step.

[0065] In this way, the carbon dioxide capture method of this embodiment may repeat steps 1 to 4. Roughly speaking, the carbon dioxide capture method switches between a first adsorption step and a first cooling step in step 1 and a second adsorption step and a second cooling step in step 3 by controlling the multiple on-off valves 140 and the temperature rise.

[0066] Next, the effects of this embodiment will be described. In the carbon dioxide capture device 1 of this embodiment, the outside air used for adsorption of carbon dioxide by the first adsorbent 110 can be used to cool the second adsorbent 210. Therefore, no additional power is required to circulate a refrigerant, and cooling efficiency can be improved.

[0067] For example, Patent Document 1 discloses a carbon dioxide capture device in which multiple plate-shaped adsorption plates that adsorb carbon dioxide contained in outside air are stacked at intervals. Carbon dioxide is adsorbed from the outside air as it passes between the adsorption plates. In Patent Document 1, multiple pipes are provided that penetrate the adsorption plates in the stacking direction. The pipes serve as heat medium flow passages through which a heat medium flows, thereby controlling the temperature of the adsorption plates. In Patent Document 1, a pump is required to flow the medium to cool it down to a temperature suitable for adsorption, which increases the energy required to capture carbon dioxide.

[0068] In contrast to this, the carbon dioxide recovery device 1 of this embodiment does not require additional power to circulate a refrigerant, and therefore can improve cooling efficiency.

[0069] The carbon dioxide capture device 1 of this embodiment also includes an exhaust passage 300 that connects the first device 100 and the second device 200. By controlling the on-off valve 140, the outside air used for adsorption by one of the first adsorbent 110 and the second adsorbent 210 can be used to cool the other. Therefore, both adsorbents can be cooled by the outside air of the other adsorbent, further improving the cooling efficiency.

[0070] The first adsorbent 110 and the second adsorbent 210 may be placed inside 121 of a cylindrical container 120. In this case, the outside air that passes through inside 121 of cylindrical container 120 adsorbs at least a portion of the carbon dioxide, and the outside air that passes around outer periphery 122 of cylindrical container 120 cools the adsorbent. Because the cooling outside air does not come into contact with the adsorbent in a high-temperature state, it is possible to suppress reaction and deterioration of the adsorbent.

[0071] Since the first exhaust passage 301 and the second exhaust passage 302 are connected to the first adsorbent 110 and the second adsorbent 210 from different directions, the adsorption process and the cooling process can be separated, thereby improving cooling efficiency.

[0072] An exhaust passage is formed around the cylindrical container 120 containing the first adsorbent 110 and the second adsorbent 210, so that air insulation can be achieved, and heat loss can be reduced.

[0073] (Embodiment 2) In the above-described first embodiment, a flow is formed in which the outside air to be treated is taken into the carbon dioxide capture device 1 by arranging the fans outside the first inlet valve 141 and outside the second inlet valve 241. In the present embodiment, a flow in which the outside air taken into the carbon dioxide capture device 1 is released to the outside may be formed by arranging the fans outside the first release port 114 and the second release port 214. Even with this configuration, the same effects as in the first embodiment can be achieved.

[0074] The present disclosure is not limited to the above-described embodiments, and can be modified as appropriate within the scope of the present disclosure.

[0075] The present disclosure can also be realized by causing a computer to execute each process related to the carbon dioxide capture method as a computer program (for example, a carbon dioxide capture program).

[0076] In the above-described embodiment, the control unit 400 is configured as a computer system including a personal computer, a word processor, etc. However, the present invention is not limited to this, and the computer can also be configured as a LAN server, a computer (personal computer) communication host, a computer system connected to the Internet, etc. It is also possible to distribute functions among devices on a network and configure a computer as a whole network.

[0077] FIG. 7 is a block diagram illustrating a control unit 400 including a computer in the carbon dioxide capture device 1 according to the first and second embodiments. As shown in FIG. 7, the control unit 400 may further include a processor PRC, a memory MMR, a storage device STR, and a user interface UI. The storage device STR stores the processing to be executed by the control unit 400 as a program. The processor PRC also loads the program from the storage device STR into the memory MMR and executes the program. In this way, the processor PRC realizes the functions of the control unit 400. The user interface UI may include input devices such as a keyboard, a mouse, and an imaging device, and output devices such as a display, a printer, and a speaker.

[0078] The control unit 400 may be realized by dedicated hardware. Also, a part or all of the control unit 400 may be realized by a general-purpose or dedicated circuit, a processor PRC, etc., or a combination of these. These may be configured by a single chip, or may be configured by multiple chips connected via a bus. A part or all of the control unit 400 may be realized by a combination of the above-mentioned circuits, etc., and a program. Also, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an FPGA (Field-programmable Gate Array), a quantum processor (quantum computer control chip), etc. can be used as the processor PRC.

[0079] Furthermore, when part or all of the control unit 400 is realized by a plurality of information processing devices, circuits, etc., the plurality of information processing devices, circuits, etc. may be centrally or decentralized. For example, the information processing devices, circuits, etc. may be realized in a form in which they are connected to each other via a communication network NW by a client-server system, a cloud computing system, etc. Furthermore, the functions of the control unit 400 may be provided in a SaaS (Software as a Service) format.

[0080] The following carbon dioxide capture method and carbon dioxide capture program are also included within the scope of the technical concept of this embodiment.

[0081] (Appendix 1) a first device including a first adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air to be treated; a second device including a second adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air; an exhaust passage communicating the first device and the second device; A carbon dioxide recovery method using a carbon dioxide recovery device having a first adsorption step of passing the ambient air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent; a first cooling step of passing the outside air through the second device via the exhaust passage so that the outside air that has passed through the first device in the first adsorption step cools the second adsorbent; A carbon dioxide capture method comprising: (Appendix 2) the first adsorbent and the second adsorbent are disposed inside a cylindrical container; the first device has one or more cylindrical containers containing the first adsorbent; the second device has one or more cylindrical containers containing the second adsorbent, In the first adsorption step, The outside air that has passed through the interior of the cylindrical container has at least a portion of the carbon dioxide adsorbed therein, In the first cooling step, The outside air that has passed through the outer periphery of the cylindrical container cools the second adsorbent. 2. The carbon dioxide capture method of claim 1. (Appendix 3) The carbon dioxide capture device a plurality of opening and closing valves provided in the first device, the second device, and the exhaust passage; a control unit that controls the plurality of on-off valves, the temperature increase of the first adsorbent, and the temperature increase of the second adsorbent; and The method further includes a first switching step of switching from the first step to the second step by controlling the plurality of opening and closing valves and the temperature increase, the first step includes the first adsorption step and the first cooling step, The second step comprises: a first temperature-raising step of raising the temperature of the first adsorbent; a first desorption step of desorbing the carbon dioxide from the first adsorbent and releasing it to the outside; Including, 2. The carbon dioxide capture method of claim 1. (Appendix 4) The carbon dioxide capture device a plurality of opening and closing valves provided in the first device, the second device, and the exhaust passage; a control unit that controls the plurality of on-off valves, the temperature increase of the first adsorbent, and the temperature increase of the second adsorbent; and The method further includes a step of switching between the first step and the third step by controlling the plurality of opening and closing valves and the temperature increase, the first step includes the first adsorption step and the first cooling step, The third step is a second adsorption step of passing the ambient air through the second device so that at least a portion of the carbon dioxide is adsorbed by the second adsorbent; a second cooling step of passing the outside air through the first device via the exhaust passage so that the outside air that has passed through the second device in the second adsorption step cools the first adsorbent; Including, 2. The carbon dioxide capture method of claim 1. (Appendix 5) a first switching step of switching from the first step to the second step; a second switching step of switching from the second step to the third step; a third switching step of switching from the third step to the fourth step; a fourth switching step of switching from the fourth step to the first step; Furthermore, The second step comprises: a first temperature-raising step of raising the temperature of the first adsorbent; a first desorption step of desorbing the carbon dioxide from the first adsorbent and releasing it to the outside; Including, The fourth step is a second temperature-raising step of raising the temperature of the second adsorbent; a second desorption step of desorbing the carbon dioxide from the second adsorbent and releasing it to the outside; Including, 5. The carbon dioxide capture method of claim 4. (Appendix 6) a first device including a first adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air to be treated; a second device including a second adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air; an exhaust passage communicating the first device and the second device; a plurality of opening and closing valves provided in the first device, the second device, and the exhaust passage; a control unit that controls the plurality of on-off valves, the temperature increase of the first adsorbent, and the temperature increase of the second adsorbent; A carbon dioxide capture program using a carbon dioxide capture device comprising: a first adsorption step of passing the ambient air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent; a first cooling step of passing the outside air through the second device via the exhaust passage so that the outside air that has passed through the first device in the first adsorption step cools the second adsorbent; A carbon dioxide capture program that runs on a computer. (Appendix 7) the first adsorbent and the second adsorbent are disposed inside a cylindrical container; the first device has one or more cylindrical containers containing the first adsorbent; the second device has one or more cylindrical containers containing the second adsorbent, In the first adsorption step, The outside air that has passed through the interior of the cylindrical container adsorbs at least a portion of the carbon dioxide, In the first cooling step, The outside air that has passed through the outer periphery of the cylindrical container cools the second adsorbent. Carbon capture programs as described in Appendix 6. (Appendix 8) further causing the computer to execute a first switching step of switching from the first step to the second step by controlling the plurality of on-off valves and the temperature increase; the first step includes the first adsorption step and the first cooling step, The second step comprises: a first temperature-raising step of raising the temperature of the first adsorbent; a first desorption step of desorbing the carbon dioxide from the first adsorbent and releasing it to the outside; Including, Carbon capture programs as described in Appendix 6. (Appendix 9) further causing the computer to execute a step of switching between the first step and the third step by controlling the plurality of on-off valves and the temperature increase; the first step includes the first adsorption step and the first cooling step, The third step is a second adsorption step of passing the ambient air through the second device so that at least a portion of the carbon dioxide is adsorbed by the second adsorbent; a second cooling step of passing the outside air through the first device via the exhaust passage so that the outside air that has passed through the second device in the second adsorption step cools the first adsorbent; Including, Carbon capture programs as described in Appendix 6. (Appendix 10) a first switching step of switching from the first step to the second step; a second switching step of switching from the second step to the third step; a third switching step of switching from the third step to the fourth step; a fourth switching step of switching from the fourth step to the first step; Then, the computer executes The second step comprises: a first temperature-raising step of raising the temperature of the first adsorbent; a first desorption step of desorbing the carbon dioxide from the first adsorbent and releasing it to the outside; Including, The fourth step is a second temperature-raising step of raising the temperature of the second adsorbent; a second desorption step of desorbing the carbon dioxide from the second adsorbent and releasing it to the outside; Including, Carbon capture programs as described in Appendix 9. [Explanation of symbols]

[0082] 1. Carbon dioxide capture device 100 1st device 101 Case 110 1st adsorbent 111 1st inlet 111a Shielding plate 112 1st outlet 112a Shield plate 113 First entrance 114 1st outlet 120 cylinder container 121 Inside 122 Outer circumference 123 Heating element 140 Opening and closing valve 141 First inlet valve 142 First discharge valve 143 First inlet valve 145 First release valve 200 2nd device 201 Case 210 Second adsorbent 211 2nd inlet 212 2nd outlet 213 Second entrance 214 2nd outlet 241 Second inlet valve 242 Second discharge valve 243 Second Inlet Valve 245 Second Desorption Valve 300 exhaust passage 301 First exhaust passage 302 Second exhaust passage 310 Common space 321 1st discharge space 322 2nd discharge space 331 First Introduction Space 332 Second Introduction Space 400 control section

Claims

1. a first device including a first adsorbent that adsorbs at least a portion of carbon dioxide contained in the outside air to be treated; a second device including a second adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air; an exhaust passage communicating the first device and the second device; A carbon dioxide capture device comprising: the outside air having passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent passes through the exhaust passage and through the second device so as to cool the second adsorbent; Carbon dioxide capture equipment.

2. the first adsorbent and the second adsorbent are disposed inside a cylindrical container; the first device has one or more cylindrical containers containing the first adsorbent, the second device has one or more cylindrical containers containing the second adsorbent, The outside air that has passed through the interior of the cylindrical container has at least a portion of the carbon dioxide adsorbed therein, The outside air that has passed through the outer periphery of the cylindrical container cools the second adsorbent. The carbon dioxide capture device according to claim 1 .

3. The first device is a first inlet through which the outside air passing through the interior of the cylindrical container flows in; a first exhaust port through which the outside air that has passed through the interior of the cylindrical container is exhausted; a first inlet through which the outside air passing through the outer periphery of the cylindrical container is introduced; a first outlet through which the outside air that has passed through the outer periphery of the cylindrical container is released; Including, The second device is a second inlet through which the outside air passing through the interior of the cylindrical container flows in; a second outlet through which the outside air that has passed through the interior of the cylindrical container is discharged; a second inlet through which the outside air passing through the outer periphery of the cylindrical container is introduced; a second outlet through which the outside air that has passed through the outer periphery of the cylindrical container is released; Including, The carbon dioxide capture device according to claim 2 .

4. a plurality of on-off valves provided in the first device, the second device, and the exhaust passage; a control unit that switches from a first state to a second state by controlling the plurality of on-off valves, the temperature increase of the first adsorbent, and the temperature increase of the second adsorbent; Furthermore, In the first state, the outside air having passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent passes through the exhaust passage and the second device so as to cool the second adsorbent; In the second state, The temperature of the first adsorbent is increased to desorb the carbon dioxide from the first adsorbent and release it to the outside. The carbon dioxide capture device according to claim 1 .

5. a plurality of on-off valves provided in the first device, the second device, and the exhaust passage; a control unit that switches between a first state and a third state by controlling the plurality of on-off valves, the temperature increase of the first adsorbent, and the temperature increase of the second adsorbent; In the first state, the outside air having passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent passes through the exhaust passage and the second device so as to cool the second adsorbent; In the third state, the outside air having passed through the second device so that at least a portion of the carbon dioxide is adsorbed by the second adsorbent passes through the exhaust passage and the first device so as to cool the first adsorbent; The carbon dioxide capture device according to claim 1 .

6. The control unit switching from the first state to the second state and then switching to the third state; switching from the third state to the fourth state and then switching to the first state; In the second state, raising the temperature of the first adsorbent to desorb the carbon dioxide from the first adsorbent and release it to the outside; In the fourth state, The temperature of the second adsorbent is increased to desorb the carbon dioxide from the second adsorbent and release it to the outside. The carbon dioxide recovery device according to claim 5 .

7. The exhaust passage is a first exhaust passage through which the outside air flows from the first device to the second device; a second exhaust passage through which the outside air flows from the second device to the first device; Including, the first exhaust passage and the second exhaust passage include portions that communicate with the first device and the second device from different directions, The carbon dioxide recovery device according to claim 5 .

8. The first device is a first inlet through which the outside air flows; a first outlet through which the outside air flowing in from the first inlet is discharged; a first inlet through which the outside air discharged from the second device is introduced; a first discharge port through which the outside air introduced from the first inlet is discharged to the outside; Including, The second device is a second inlet through which the outside air flows; a second outlet through which the outside air flowing in from the second inlet is discharged; a second inlet through which the outside air discharged from the first device is introduced; a second outlet through which the outside air introduced from the second inlet is released to the outside; Including, The exhaust passage is a common space disposed between the first device and the second device; a first discharge space disposed between the common space and the first discharge port; a first introduction space disposed between the common space and the first introduction port; a second discharge space disposed between the common space and the second discharge port; a second introduction space disposed between the common space and the second introduction port; Including, The plurality of on-off valves include a first inlet valve that opens and closes the first inlet; a first discharge valve that opens and closes between the common space and the first discharge space; a first introduction valve that opens and closes between the common space and the first introduction space; a second inlet valve that opens and closes the second inlet; a second discharge valve that opens and closes between the common space and the second discharge space; a second introduction valve that opens and closes between the common space and the second introduction space; Including, the first exhaust valve, the first introduction valve, the second exhaust valve, and the second introduction valve are provided in the exhaust passage, the first exhaust passage includes the first discharge space, the common space, and the second introduction space, which are all connected to each other; the second exhaust passage includes the second exhaust space, the common space, and the first introduction space, which are all connected to each other; The carbon dioxide capture device according to claim 7.

9. a first detachment valve that opens and closes between the first discharge space and the outside; a second detachment valve that opens and closes between the second discharge space and the outside; further comprising: The carbon dioxide capture device according to claim 8.

10. an exhaust port for discharging the outside air to the outside is disposed on the opposite side of the inlet port that is in communication with the first exhaust passage in the second device; an inlet through which the outside air flows in from the outside is disposed on the opposite side of the outlet in the second device that is in communication with the second exhaust passage; The carbon dioxide capture device according to claim 7.

11. a first device including a first adsorbent that adsorbs at least a portion of carbon dioxide contained in the outside air to be treated; a second device including a second adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air; an exhaust passage communicating the first device and the second device; A carbon dioxide recovery method using a carbon dioxide recovery device having a first adsorption step of passing the ambient air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent; a first cooling step of passing the outside air through the second device via the exhaust passage so that the outside air that has passed through the first device in the first adsorption step cools the second adsorbent; A carbon dioxide capture method comprising:

12. a first device including a first adsorbent that adsorbs at least a portion of carbon dioxide contained in the outside air to be treated; a second device including a second adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air; an exhaust passage communicating the first device and the second device; a plurality of on-off valves provided in the first device, the second device, and the exhaust passage; a control unit that controls the plurality of on-off valves, the temperature increase of the first adsorbent, and the temperature increase of the second adsorbent; A carbon dioxide capture program using a carbon dioxide capture device comprising: a first adsorption step of passing the ambient air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent; a first cooling step of passing the outside air through the second device via the exhaust passage so that the outside air that has passed through the first device in the first adsorption step cools the second adsorbent; A carbon dioxide capture program that runs on a computer.

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