Mobile carbon dioxide capture device and carbon dioxide capture method

Abstract

Efficiently captures carbon dioxide from the atmosphere. [Solution] This is a carbon dioxide capture device 2 that captures carbon dioxide by taking in air while in motion. It comprises a carbon dioxide adsorbent 20a housed in a housing 10 attached to a mobile body 1. The housing 10 has a plurality of capture chambers 13, openable and closable air intake ports 15 provided on the front of these chambers, and air outlet ports 16 provided on the back of these chambers. The adsorbent 20a is filled into each of the capture chambers 13 at different densities. The control device 2b controls the open / closed state of each air intake port 15 according to the movement speed of the mobile body 1 so that air is drawn into the capture chambers 13 with higher filling densities at higher speeds than at lower speeds.

Description

Technical Field

[0001] The disclosed technology relates to a carbon dioxide recovery device for a moving body and a method for recovering carbon dioxide.

Background Art

[0002] In recent years, in order to reduce greenhouse gas emissions, the realization of carbon neutrality (CN) has been emphasized. As one of the means for its realization, a technology of mounting a carbon dioxide recovery device on a moving body and recovering carbon dioxide in the atmosphere has been studied (for example, Patent Document 1).

[0003] In the vehicle of Patent Document 1, a pipe line that extends in the front-rear direction and through which air flows during driving is provided below the floor panel. A carbon dioxide recovery device is installed in the middle of the pipe line. A bypass pipe that bypasses the carbon dioxide recovery device is also provided in the pipe line. By opening and closing a shutter, the inflow of air into the carbon dioxide recovery device is switched. Thereby, the recovery and non-recovery of carbon dioxide can be operated.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the technology of Patent Document 1, the vehicle speed is not considered.

[0006] That is, the flow rate of air changes between low speed and high speed. When the carbon dioxide recovery device uses an adsorbent to adsorb carbon dioxide, at high speed, a large amount of air flows into the pipe line, and the contact between the adsorbent and the air becomes insufficient. Along with this, the carbon dioxide recovery efficiency decreases. Since the air resistance also increases, the fuel consumption and power consumption of the vehicle also decrease.

[0007] Furthermore, the technology described in Patent Document 1 does not consider what happens after the carbon dioxide is recovered in the carbon dioxide recovery device. Once the recovered carbon dioxide reaches its maximum capacity, processing such as carbon dioxide extraction or regeneration becomes necessary. Such processing is difficult on the underside of the floor panel, but there is no explanation of these processes.

[0008] Therefore, this specification discloses a technology that can efficiently capture carbon dioxide from the atmosphere. [Means for solving the problem]

[0009] The disclosed technology relates to a mobile carbon dioxide capture device that takes in air while in motion and captures carbon dioxide from the atmosphere.

[0010] The carbon dioxide recovery device comprises a housing attached to the mobile body, a carbon dioxide adsorbent housed in the housing, and a control device for controlling the recovery of carbon dioxide. The housing has a plurality of recovery chambers extending in the direction of travel of the mobile body, an openable and closable air intake provided on the front of the recovery chambers for taking in air, and an air outlet provided on the rear of the recovery chambers for discharging air.

[0011] The adsorbent is filled into each of the recovery chambers at different densities, and the control device controls the opening and closing state of each of the air intake ports according to the movement speed of the moving body, so that air is drawn into the recovery chamber with a higher filling density at higher speeds than at lower speeds.

[0012] In other words, this carbon dioxide capture device has a housing that contains carbon dioxide adsorbent material, and multiple capture chambers are provided that extend in the direction of the mobile body's movement. Air intake and exhaust ports are provided on the front and back of these capture chambers. Therefore, air can be drawn into the housing along the direction of the mobile body's movement and efficiently brought into contact with the adsorbent material.

[0013] The wind pressure on the enclosure changes in strength depending on the speed of movement. As a result, at low speeds, recovery chambers with high packing density have difficulty introducing air, while recovery chambers with low packing density can introduce a large amount of air even at low speeds. Therefore, recovery chambers with low packing density can ensure high carbon dioxide recovery efficiency.

[0014] However, recovery chambers with low packing density will have excessive air intake at high speeds, reducing the efficiency of carbon dioxide recovery. Driving resistance will also increase. In other words, there is an appropriate range for the packing density of the adsorbent depending on the speed of travel.

[0015] In contrast, this carbon dioxide capture system is equipped with multiple capture chambers with different filling densities. The control system adjusts the opening and closing state of each air intake according to the vehicle's speed, so that air is drawn into the capture chamber with a higher filling density at higher speeds than at lower speeds. This stabilizes the carbon dioxide capture efficiency even when the vehicle's speed changes, allowing for efficient capture of carbon dioxide from the atmosphere. Furthermore, it is even more efficient because the amount of adsorbent material that can be filled according to the vehicle's speed can be selected.

[0016] The carbon dioxide recovery device may be configured as follows, for example: The recovery chamber includes at least a first recovery chamber with the lowest packing density and a second recovery chamber with the next highest packing density after the first recovery chamber. When the mobile body is moving in a predetermined first speed range with the lowest speed, the control device performs a first opening / closing control to open the air intake of the first recovery chamber. When the mobile body is moving in a second speed range with the next highest speed range after the first speed range, the control device performs a second opening / closing control to open the air intake of the second recovery chamber and close the air intake of the first recovery chamber. If the recovery chamber includes a third recovery chamber with the next highest packing density after the second recovery chamber, when the mobile body is moving in a third speed range with the next highest speed range after the second speed range, the control device performs a third opening / closing control to open the air intake of the third recovery chamber and close the air intakes of the first and second recovery chambers.

[0017] This allows for adjustment of the carbon dioxide capture rate within a two- or three-stage speed range. It enables efficient carbon dioxide capture with a relatively simple structure.

[0018] The outer surface of the housing, which extends along the direction of travel of the moving body, may be formed to be streamlined.

[0019] This reduces rolling resistance even when the enclosure is mounted on the outer surface of the mobile body. Consequently, energy loss in the mobile body can be suppressed.

[0020] The adsorbent may be a humidity-swinging type adsorbent that adsorbs carbon dioxide in a dry state and desorbs carbon dioxide in a wet state.

[0021] This allows carbon dioxide to be released from the adsorbent by wetting it with water. Therefore, the adsorbent can be regenerated relatively easily, and the recovered carbon dioxide can be reused relatively easily.

[0022] The control device may further include a water supply unit that enables water to be supplied to the recovery chambers, a water passage that enables the transfer of water between each of the recovery chambers, and an on-off valve installed in the water passage, wherein the control device controls the on-off valve according to the adsorption state of the adsorbent material in each of the recovery chambers.

[0023] In the carbon dioxide capture system described above, if the carbon dioxide adsorption capacity in any of the capture chambers reaches its limit, the adsorbent material must be regenerated to restore its adsorption performance, even if other capture chambers are still capable of adsorption. As a result, regeneration processes become frequent, which is disadvantageous in terms of work efficiency. In contrast, this carbon dioxide capture system allows carbon dioxide to be transferred between capture chambers. Therefore, the adsorbent material in each capture chamber can be used efficiently without waste, and the frequency of regeneration processes can be reduced.

[0024] Specifically, when any one of the recovery chambers becomes a high adsorption recovery chamber where the adsorption amount of the adsorbent is equal to or greater than a predetermined value, the control device controls the water supply unit to supply water to the high adsorption recovery chamber, thereby performing a desorption process of wetting the adsorbent. Then, the control device controls the on-off valve to perform a transfer process of transferring the water in the high adsorption recovery chamber to a low adsorption recovery chamber where the adsorption amount of the adsorbent is less than the predetermined value. This is also acceptable.

[0025] If so, the transfer of carbon dioxide between the recovery chambers can be automatically performed, improving the convenience of the carbon dioxide recovery device.

[0026] A preferred specific example of the moving body is an automobile.

[0027] The disclosed technology also relates to a method for recovering carbon dioxide from the atmosphere.

[0028] One of the recovery methods includes a recovery step of adsorbing carbon dioxide to the adsorbent using the carbon dioxide recovery device described above, a removal step of removing the housing or the adsorbent from the moving body, a regeneration step of wetting the adsorbent to desorb carbon dioxide, and an attachment step of attaching the housing or the adsorbent to the moving body. <00001​​​​​​​​​​Another recovery method includes a recovery step of adsorbing carbon dioxide onto the adsorbent using the carbon dioxide recovery device described above; a desorption step of wetting the adsorbent by supplying water to the high-adsorption recovery chamber when either of the recovery chambers becomes a high-adsorption recovery chamber where the amount of adsorption by the adsorbent exceeds a predetermined value; a transfer step of transferring the water from the high-adsorption recovery chamber to a low-adsorption recovery chamber where the amount of adsorption by the adsorbent is less than the predetermined value; and a recovery step of drying the wet adsorbent in the high-adsorption recovery chamber and the low-adsorption recovery chamber.

[0032] The adsorbent material in each recovery chamber can be used efficiently without waste, reducing the frequency of regeneration. The performance of the adsorbent material can be restored quickly, enabling efficient carbon dioxide recovery. [Effects of the Invention]

[0033] The carbon dioxide capture device that utilizes the disclosed technology will enable the efficient capture of carbon dioxide from the atmosphere. [Brief explanation of the drawing]

[0034] [Figure 1] This is a diagram showing a vehicle to which the disclosed technology has been applied. [Figure 2] This is a diagram illustrating the structure of a carbon dioxide capture device. [Figure 3] This is a block diagram of the control device and its related equipment. [Figure 4] This is a simplified diagram showing the CO2 capture system at low, medium, and high speeds. [Figure 5] This is a flowchart illustrating an example of control operation for a control device. [Figure 6] This diagram illustrates an example of a method for regenerating adsorbents and reusing carbon dioxide. [Figure 7] This is a diagram illustrating the first application example of a carbon dioxide capture device. [Figure 8] This is a block diagram of the control device and its related equipment in the first application example. [Figure 9]This is a flowchart illustrating the control example of the control device in the first application example. [Figure 10] This is a diagram illustrating a second application example of the carbon dioxide capture device. [Figure 11] This is a flowchart illustrating a control example of the control device in the second application example. [Modes for carrying out the invention]

[0035] The following describes the disclosed technology. However, the following description is essentially illustrative. The front, rear, left, right, and up directions used in the description are based on the vehicle shown in the embodiment.

[0036] <Mobile> Figure 1 shows an example of a mobile device to which the disclosed technology (carbon dioxide capture device) is applied. The example mobile device is vehicle 1 (automobile). However, the disclosed technology can be applied to any mobile device, such as ships or railway vehicles.

[0037] The power source of vehicle 1 may be an engine, a motor, or both (so-called conventional automobiles, electric vehicles, hybrid vehicles). The form of vehicle 1 is also exemplified here as a passenger car, but it may also be a cargo vehicle or the like.

[0038] <Carbon dioxide capture device> In order to take in air and capture carbon dioxide from the atmosphere while Vehicle 1 is moving (driving), Vehicle 1 is equipped with a carbon dioxide capture device (specifically, a CO2 capture device 2a) on its roof panel 1a.

[0039] Note that the installation of roof panel 1a is just one example. The CO2 capture unit can be installed anywhere on the exterior of the vehicle body 1, and can be selected according to the specifications. Specifically, the CO2 capture unit can be installed on the hood, side panels including door panels, various pillars including B-pillars, side sills, etc. However, the underside of vehicle 1 is disadvantageous because it is difficult to access the CO2 capture unit.

[0040] Figure 2 shows the specific structure of the CO2 capture unit 2a for the roof panel. The CO2 capture unit 2a is mounted on the outer surface of the roof panel 1a.

[0041] The CO2 capture unit 2a has a housing 10 that extends along the upper surface of the roof panel 1a. The housing 10 in this embodiment is detachably attached to the upper surface of the roof panel 1a. The housing 10 has an assembly base 11 that is detachably fixed to the outer surface of the roof panel 1a, and a cover case 12 that is integrated so as to cover the surface of the assembly base 11.

[0042] Between the assembly base 11 and the cover case 12, multiple recovery chambers 13 are formed that extend along the direction of travel of the vehicle 1 by partitioning the inside of the housing 10. In this embodiment, three recovery chambers 13 (first recovery chamber 13a, second recovery chamber 13b, and third recovery chamber 13c) are provided in the housing 10 by partitioning it vertically with plate materials (first partition plate 14a, second partition plate 14b). The third recovery chamber 13c, second recovery chamber 13b, and first recovery chamber 13a are stacked on top of each other in order from bottom to top (the recovery chambers 13 will be described separately later).

[0043] A frame (not shown) is assembled to the assembly base 11. The cover case 12 is composed of multiple exterior members attached to the frame. Specifically, the cover case 12 consists of a first front shutter 12a, a second front shutter 12b, a third front shutter 12c, a top panel 12d, a rear shutter 12e, a pair of end panels 12f, 12f, and the like.

[0044] The third front shutter 12c is pivotably supported on the front edge of the second partition plate 14b. The third front shutter 12c opens and closes the air intake 15 (third air intake 15c) located in front of the third recovery chamber 13c, which brings air into the third recovery chamber 13c. The second front shutter 12b is pivotably supported on the front edge of the first partition plate 14a. The second front shutter 12b opens and closes the air intake 15 (second air intake 15b) located in front of the second recovery chamber 13b, which brings air into the second recovery chamber 13b.

[0045] The first front shutter 12a is pivotally supported on the front edge of the top panel 12d. The first front shutter 12a opens and closes the air intake 15 (first air intake 15a) located in front of the first recovery chamber 13a, which brings air into the first recovery chamber 13a.

[0046] The rear shutter 12e is pivotally supported on the rear edge of the top panel 12d. The rear shutter 12e is located on the rear of the first recovery chamber 13a, the second recovery chamber 13b, and the third recovery chamber 13c, and opens and closes the air outlet 16 that discharges air from these recovery chambers 13. Note that a rear shutter 12e may be provided individually for each recovery chamber 13.

[0047] Under normal conditions, these shutters 12a, 12b, and 12c are closed. Therefore, unless otherwise specified, the explanation will assume that the shutters 12a, 12b, and 12c are closed. A pair of end panels 12f, 12f are provided on both the left and right sides of the housing 10 so as to extend parallel to each other in the front-to-back direction. Both the left and right sides of each collection chamber 13 are covered by these end panels 12f, 12f.

[0048] The outer surface of the housing 10, which extends along the direction of travel of vehicle 1, is formed to be streamlined.

[0049] Specifically, the outer surfaces of the first front shutter 12a, second front shutter 12b, third front shutter 12c, top panel 12d, and rear shutter 12e are composed of curved or sloped surfaces that curve outward in the front-to-back direction. Furthermore, the rear top is positioned closer to the assembly base 11 than the front top. As a result, the rear of the housing 10 is formed of a curved surface with a smaller cross-sectional width than the front.

[0050] In this way, the running resistance of the vehicle 1 can be reduced by forming the outer surface of the housing 10. The shape of the housing 10 can be adjusted as appropriate according to the specifications. For example, only the top panel 12d may be formed as a curved surface. The front and rear cross-sectional widths may be the same.

[0051] (Collection Room) As described above, in this embodiment, the housing 10 is provided with three recovery chambers 13 (first recovery chamber 13a, second recovery chamber 13b, and third recovery chamber 13c).

[0052] These recovery chambers 13 house cartridges (adsorption cartridges 20) made of an adsorbent material that adsorbs carbon dioxide. The adsorbent material 20a constituting the adsorption cartridge 20 in each recovery chamber 13 is made of the same material. In this embodiment, a humidity swing type adsorbent material is used for the adsorbent material 20a.

[0053] Since humidity-swinging adsorbents are well-known, a detailed explanation will be omitted. Humidity-swinging adsorbents consist of, for example, zeolite and strongly basic anion exchange resins containing quaternary ammonium groups, and their carbon dioxide adsorption performance differs depending on the water content. Generally speaking, humidity-swinging adsorbent 20a has the property of adsorbing carbon dioxide in a dry state and desorbing carbon dioxide in a wet state.

[0054] The packing density of the adsorbent 20a differs in each recovery chamber 13. That is, the amount of adsorbent 20a packed per unit volume of the recovery chamber 13 differs. Each recovery chamber 13 in this embodiment is packed with adsorbent 20a of substantially the same particle size, but the particle size differs in size from one recovery chamber to the other. As a result, the void ratio of each recovery chamber 13 differs.

[0055] Specifically, the particle size of the adsorbent 20a packed in the third recovery chamber 13c is the smallest, and its packing density is the highest. The particle size of the adsorbent 20a packed in the second recovery chamber 13b is the next largest, and its packing density is lower than that of the third recovery chamber 13c. The particle size of the adsorbent 20a packed in the first recovery chamber 13a is the largest, and its packing density is lower than that of the second recovery chamber 13b. In other words, it has the lowest packing density.

[0056] Therefore, when comparing chambers of the same volume, the third recovery chamber 13c has the largest amount of adsorbent material 20a and the smallest amount of empty space. Then, in the order of the second recovery chamber 13b and the first recovery chamber 13a, the amount of adsorbent material 20a decreases and the amount of empty space increases.

[0057] As a result, the air permeability decreases in the order of the first recovery chamber 13a, the second recovery chamber 13b, and the third recovery chamber 13c, making it more difficult for air to flow. On the other hand, the amount of carbon dioxide that can be adsorbed increases in the order of the first recovery chamber 13a, the second recovery chamber 13b, and the third recovery chamber 13c.

[0058] The capacities of each recovery chamber 13 may be the same or different. For example, the capacities of the first recovery chamber 13a, second recovery chamber 13b, and third recovery chamber 13c may be reduced in order to minimize the difference in the amount of adsorbent 20a packed in each chamber. Furthermore, the packing density of the adsorbent 20a may be adjusted by controlling the amount of adsorbent 20a loaded onto the fibrous material, etc., while keeping the particle size the same.

[0059] Although not shown in Figure 2, the recovery chamber 13 is equipped with multiple motors for opening and closing the first front shutter 12a, the second front shutter 12b, the third front shutter 12c, the top panel 12d, and the rear shutter 12e. Specifically, it is equipped with a first motor 17a for opening and closing the first front shutter 12a, a second motor 17b for opening and closing the second front shutter 12b, a third motor 17c for opening and closing the third front shutter 12c, and a fourth motor 17d for opening and closing the rear shutter 12e.

[0060] To control the operation of these motors and thereby control carbon dioxide capture, the CO2 capturer 2a is equipped with a control device 2b. As shown in Figure 2, the control device 2b is electrically connected to the CO2 capturer 2a via a plug 12g.

[0061] (Control device) Figure 3 shows a block diagram of the control device 2b and its related equipment. The control device 2b consists of hardware such as a processor, memory, and interface, and software such as data implemented in memory and control programs.

[0062] Vehicle 1 is equipped with a vehicle speed sensor 3 for measuring vehicle speed. Control device 2b receives a vehicle speed signal from vehicle speed sensor 3. Vehicle 1 is also equipped with a rain / snow sensor 4 for detecting rain and snow. Control device 2b receives a rain / snow signal from rain / snow sensor 4.

[0063] The control device 2b is electrically connected to the first motor 17a, the second motor 17b, the third motor 17c, and the fourth motor 17d, and outputs control signals to them based on signals input from the vehicle speed sensor 3 and the rain / snow sensor 4. As a result, the control device 2b controls the opening and closing states of the air intake 15 and air outlet 16 of the CO2 capturer 2a, as described above, according to the vehicle speed or weather conditions. The CO2 capturer 2a and the control device 2b constitute the carbon dioxide capture system 2.

[0064] Vehicle 1 also has an application installed for using the carbon dioxide capture device 2. When the user activates this application, the carbon dioxide capture device 2 starts working and can capture carbon dioxide from the atmosphere. The application has various operating modes corresponding to the state of the carbon dioxide capture device 2, such as CO2 capture mode and regeneration mode.

[0065] (CO2 capture mode) When the application is launched by the user, the control unit 2b begins processing related to the capture of carbon dioxide from the atmosphere. Specifically, while the vehicle 1 is in motion, the carbon dioxide capture device 2 uses the airflow to draw air into the CO2 capturer 2a and adsorbs carbon dioxide onto the adsorption cartridge 20. In this way, it performs the process of capturing carbon dioxide from the atmosphere (CO2 capture mode).

[0066] During this process, the vehicle speed constantly changes from high to low. The airflow also changes in strength according to the vehicle speed. Therefore, the airflow velocity changes according to the vehicle speed.

[0067] At low speeds, the airflow is weak, and the air velocity is slow. Therefore, the recovery chamber 13, which has a high packing density, has limited space, making it difficult for air to flow through. Consequently, it is difficult to introduce air. Since sufficient contact cannot be made between the air and the adsorbent 20a, the carbon dioxide recovery efficiency decreases.

[0068] In contrast, the recovery chamber 13, with its low packing density, has more open space, allowing air to flow easily. Therefore, a large amount of air can be introduced even at low speeds. The slow airflow velocity also allows for sufficient contact between the air and the adsorbent 20a. This ensures high carbon dioxide recovery efficiency.

[0069] In contrast, the airflow at high speeds is strong, and the air velocity is high. Therefore, the recovery chamber 13, which has a low packing density and is easy to introduce air into, receives an excessive amount of air. Because the air velocity is also high, contact between the air and the adsorbent 20a becomes insufficient. Consequently, the carbon dioxide recovery efficiency decreases. Moreover, opening the air intake 15 increases driving resistance.

[0070] In other words, the packing density of the adsorbent material 20a has an appropriate range depending on the vehicle speed.

[0071] Therefore, in order to suppress the impact of changes in vehicle speed on the carbon dioxide recovery efficiency, the carbon dioxide recovery device 2 is designed to recover carbon dioxide at an appropriate packing density of the adsorbent material 20a according to the vehicle speed. Specifically, multiple recovery chambers 13 with different packing densities are provided, and the control device 2b controls the opening and closing state of each air intake 15 according to the vehicle speed, so that air is drawn into the recovery chamber 13 with a higher packing density at higher speeds than at lower speeds.

[0072] Specifically, as schematically shown in Figure 4, when the vehicle 1 is moving within the lowest predetermined speed range (low speed), the control device 2b executes control to open the first air intake 15a of the first recovery chamber 13a, which has the lowest filling density (first opening / closing control). Carbon dioxide can be recovered with adsorbent 20a having an appropriate filling density for low speed. At this time, the second air intake 15b and third air intake 15c, which have a higher filling density than the first recovery chamber 13a, are preferably closed from the viewpoint of driving resistance, but may be left open from the viewpoint of carbon dioxide recovery.

[0073] When vehicle 1 is moving in a second speed range, which is the next highest speed range after the first speed range (medium speed), the control device 2b opens the second air intake 15b and closes the first air intake 15a (second opening / closing control). Carbon dioxide can be recovered with the adsorbent 20a having an appropriate packing density for the medium speed.

[0074] If the first air intake 15a is left open, air will also be introduced into the first recovery chamber 13a. Since the first recovery chamber 13a has a smaller filling capacity, its adsorption capacity reaches its upper limit earlier than that of the second recovery chamber 13b and the third recovery chamber 13c. As a result, the adsorbent material 20a will need to be regenerated while the second recovery chamber 13b and the third recovery chamber 13c are still capable of adsorption.

[0075] In this case as well, the third air intake 15c, which has a higher filling density than the second recovery chamber 13b, is preferable to be closed from the viewpoint of driving resistance, but may be left open from the viewpoint of carbon dioxide recovery.

[0076] When vehicle 1 is moving in the third speed range, which is the next highest speed range after the second speed range (high speed), the control device 2b opens the third air intake 15c and closes the first air intake 15a and the second air intake 15b (third opening / closing control). Carbon dioxide can be recovered with the adsorbent 20a having an appropriate packing density for high speed. Driving resistance can also be reduced by closing the first air intake 15a and the second air intake 15b.

[0077] The vehicle speeds for switching between low, medium, and high speeds (switchable speeds) can be selected according to the specifications. For example, the speed range of vehicle 1 may be divided into three equal parts: the first speed range, the second speed range, and the third speed range. The first speed range includes idling and stopping. The size of these ranges should be adjusted according to the driving conditions of vehicle 1.

[0078] Even when the vehicle speed changes, the carbon dioxide capture efficiency can be stabilized, allowing for efficient capture of carbon dioxide from the atmosphere. Furthermore, the ability to select the appropriate amount of adsorbent material 20a according to the vehicle speed makes it even more efficient.

[0079] Although not shown in Figure 4, when carbon dioxide is captured, the air outlet 16 is opened along with the air intake 15.

[0080] (Suitable for rain and snow) As described above, in this embodiment, a humidity-swinging type adsorbent 20a is used in the adsorption cartridge 20. Therefore, if the adsorption cartridge 20 gets wet due to rain or snow, the carbon dioxide adsorbed on the adsorbent 20a will be released.

[0081] Therefore, the carbon dioxide capture device 2 is configured to prioritize the execution of a control (fourth opening / closing control) in which the control device 2b completely closes (the air intake 15 and air outlet 16 are closed) when the rain / snow sensor 4 detects rain or snow. For example, if rainfall is detected while driving at a low speed, the control device 2b closes the first air intake 15a and air outlet 16, even while driving. When the carbon dioxide capture device 2 is not in use, the CO2 capturer 2a is in a completely closed state, so there is no risk of it getting wet from rain or other sources.

[0082] (Example of control of the control device in CO2 capture mode) Figure 5 shows an example of control of the control device 2b in CO2 capture mode. When the user gets in and the power of vehicle 1 is turned on (No in step S1), various sensors are activated. Then, as described above, when the user starts the application, the control device 2b starts processing related to the capture of carbon dioxide from the atmosphere.

[0083] The control device 2b determines whether or not there is rainfall or snowfall based on the signal from the rain / snow sensor 4 (step S2). If it determines that there is rainfall or snowfall, the control device 2b executes the fourth opening / closing control (step S3, CO2 capturer 2a is in a fully closed state). As mentioned above, when the carbon dioxide capture device 2 is not in use, the CO2 capturer 2a is in a fully closed state. Therefore, if there is rainfall or snowfall before the start of driving, that state will be maintained.

[0084] On the other hand, if it is determined that there is no rain or snowfall, the control device 2b determines, based on the signal from the vehicle speed sensor 3, whether the vehicle speed is equal to or greater than the first switching vehicle speed V1, that is, whether it is at low speed or medium speed (step S4). If it is determined that the vehicle speed is less than the first switching vehicle speed V1, it executes the first opening / closing control (step S5).

[0085] On the other hand, if it is determined that the vehicle speed is equal to or greater than the first switching speed V1, then it is determined whether the vehicle speed is equal to or greater than the second switching speed V2, that is, whether it is high speed or not (step S6). If it is determined that the vehicle speed is less than the second switching speed V2, the second opening / closing control is executed (step S7). If it is determined that the vehicle speed is equal to or greater than the second switching speed V2, the third opening / closing control is executed (step S8).

[0086] Thus, these control operations continue as long as the power to vehicle 1 is on (steps S2 to S8). When the operation of vehicle 1 ends and its power is turned off (Yes in step S1), the control device 2b returns the CO2 recoverer 2a to its initial state (fully closed state) (initialization control, step S9).

[0087] (Regeneration of adsorbents, reuse of CO2) According to the recovery method described above, carbon dioxide can be recovered efficiently. However, when the amount of carbon dioxide adsorbed in any of the recovery chambers 13 reaches its upper limit (adsorption rate of 100%), the adsorbent material 20a in that recovery chamber 13 can no longer adsorb carbon dioxide. Therefore, the adsorption cartridge 20 in that recovery chamber 13 requires regeneration treatment to restore its adsorption performance. To effectively recover carbon dioxide from the atmosphere, regeneration treatment must be performed relatively frequently. In that case, the burden on the user is significant.

[0088] Therefore, in this carbon dioxide capture device 2, a humidity-swinging type adsorbent 20a is used as the adsorbent material 20a, and the housing 10 is made detachable, so that the adsorption cartridge 20 can be regenerated in a relatively simple manner.

[0089] Specifically, as described above, in CO2 recovery mode, the carbon dioxide recovery device 2 is used to adsorb carbon dioxide onto the adsorbent material 20a (recovery step). When the amount of carbon dioxide adsorbed onto the adsorbent material 20a reaches the upper limit in any of the recovery chambers 13, the following steps are sequentially performed, as shown in Figure 6: removing the housing 10 from the vehicle 1 (removal step), wetting the adsorbent material 20a to release carbon dioxide from the adsorbent material 20a (regeneration step), and attaching the housing 10 to the vehicle 1 (attachment step).

[0090] In this embodiment, a process (reuse step) is also performed to reuse the carbon dioxide that is removed in the regeneration step.

[0091] Specifically, as shown in the regeneration / reuse step in Figure 6, the user removes, for example, the adsorption cartridge 20 that needs to be regenerated from the removed housing 10. Then, water is passed through the adsorption cartridge 20. When water is passed through, carbon dioxide is released from the adsorbent material 20a, and the adsorption cartridge 20 can be regenerated.

[0092] In this process, most of the carbon dioxide dissolves in water. The remaining carbon dioxide, being heavier than air, can also be carried away with the water. Therefore, by spraying this water and carbon dioxide onto crops and horticultural plants, the carbon dioxide recovered from the atmosphere can be effectively utilized and reused.

[0093] <First Application Example> In the case of the carbon dioxide recovery device 2 described above, if the carbon dioxide adsorption rate in any of the recovery chambers 13 reaches 100% and adsorption becomes impossible, regeneration treatment is necessary to restore the adsorption performance of the adsorbent material 20a in that recovery chamber 13, even if other recovery chambers 13 are still capable of adsorption. In particular, in the case of this carbon dioxide recovery device 2, the recovery chambers 13 are used differently depending on the vehicle speed, and since the filling density of each recovery chamber 13 is different, differences in adsorption rates are likely to occur in each recovery chamber 13. As a result, regeneration treatment becomes frequent, which is disadvantageous in terms of work efficiency.

[0094] Therefore, it is preferable to ensure that there is no difference in the adsorption rate in each recovery chamber 13, and that the regeneration process can be carried out with sufficient carbon dioxide adsorbed in all recovery chambers 13. Accordingly, the carbon dioxide recovery device 2 (first application device 30) in this first application example is designed to eliminate differences in the adsorption rate in each recovery chamber 13 by performing a desorption process in one of the recovery chambers 13 and transferring the adsorbed carbon dioxide to the other recovery chambers 13 (desorption / transfer mode).

[0095] Figure 7 shows the structure of the first application device 30. The basic structure of the first application device 30 is the same as that of the carbon dioxide capture device 2 described above. Therefore, the same reference numerals are used for the same components, and their explanations are simplified or omitted.

[0096] The first application device 30 further includes a water supply unit 31 that enables water supply to the recovery chamber 13, a water passage 32 that enables water transfer between each of the recovery chambers 13, and an on-off valve 33 installed in the water passage 32. The on-off valve 33 is normally closed. The control device 2b is configured to control the on-off valve 33 according to the adsorption state of each adsorbent 20a in the recovery chamber 13.

[0097] The water supply section 31 consists of a water storage tank 31a, a water supply pump 31b, and water supply piping 31c. The water storage tank 31a, which stores water, is connected to the suction port of the water supply pump 31b via water supply piping 31c. The water supply piping 31c is equipped with an on / off valve 31d that opens and closes the flow path.

[0098] The water passage 32 consists of water supply pipes and return pipes (first water supply pipe 32a, second water supply pipe 32b, third water supply pipe 32c, first return pipe 32d, second return pipe 32e, third return pipe 32f) corresponding to each recovery chamber 13. Each of these pipes is equipped with an on / off valve 33.

[0099] A water spray plate 35 is installed above the adsorption cartridge 20 in each recovery chamber 13. One end of the first water supply pipe 32a is connected to the discharge port of the water supply pump 31b, and the other end of the first water supply pipe 32a is connected to the water spray plate 35a in the first recovery chamber 13a. One end of the second water supply pipe 32b is connected to the discharge port of the water supply pump 31b, and the other end of the second water supply pipe 32b is connected to the water spray plate 35b in the second recovery chamber 13b. One end of the third water supply pipe 32c is connected to the discharge port of the water supply pump 31b, and the other end of the third water supply pipe 32c is connected to the water spray plate 35c in the third recovery chamber 13c.

[0100] An outlet is provided on the lower side of the adsorption cartridge 20 in each recovery chamber 13. One end of the first return pipe 32d is connected to the outlet of the first recovery chamber 13a, and the other end of the first return pipe 32d is connected to the suction port of the water supply pump 31b via a manifold pipe 32g. One end of the second return pipe 32e is connected to the outlet of the second recovery chamber 13b, and the other end of the second return pipe 32e is connected to the suction port of the water supply pump 31b via a manifold pipe 32g. One end of the third return pipe 32f is connected to the outlet of the third recovery chamber 13c, and the other end of the third return pipe 32f is connected to the suction port of the water supply pump 31b via a manifold pipe 32g.

[0101] Figure 8 shows a block diagram of the control device 2b and related equipment in the first application device 30, which are related to the detachment and transfer process of the adsorbent material 20a. The vehicle 1 is equipped with a regeneration warning means 5 (such as a flashing display or buzzer) to prompt the user to regenerate the adsorption cartridge 20.

[0102] The control device 2b has a functional configuration consisting of an adsorption amount calculation unit 36a, a desorption processing unit 36b, and a recovery processing unit 36c. The control device 2b has pre-configured information for each recovery chamber 13, such as the relationship between vehicle speed and airflow rate, and the relationship between airflow rate and the amount of carbon dioxide adsorbed, based on experiments, and this information is stored in memory. The adsorption amount calculation unit 36a uses this information to calculate the amount of air that has passed through each recovery chamber 13 based on the vehicle speed and the opening time of the air intake 15. Then, it calculates the amount of carbon dioxide adsorbed from the calculated amount of air.

[0103] The desorption processing unit 36b, in cooperation with the adsorption amount calculation unit 36a, controls the water supply unit 31 to supply water to the high-adsorption recovery chamber 13 when any of the recovery chambers 13 has an adsorption amount of adsorbent material 20a that exceeds a predetermined value (high-adsorption recovery chamber 13), thereby wetting the adsorbent material 20a (desorption process). Furthermore, the desorption processing unit 36b then controls the on-off valve 33 to transfer the water from the high-adsorption recovery chamber 13 to the recovery chamber 13 where the adsorption amount of adsorbent material 20a is less than a predetermined value (low-adsorption recovery chamber 13) (transfer process).

[0104] The recovery processing unit 36c prioritizes opening the air intake 15 and the air outlet 16. By doing so, it dries the adsorption cartridge 20, which has been wet by the desorption process, and performs a process (recovery process) to restore its adsorption performance.

[0105] Figure 9 shows an example of the control of the control device 2b in the desorption / transfer mode of the first application device 30. During application startup, the control device 2b accumulates the amount of air that has passed through each recovery chamber 13 (step S10). Then, it calculates the amount of carbon dioxide adsorbed from the accumulated amount of air (step S11).

[0106] The control device 2b then determines whether the amount of carbon dioxide adsorbed in all recovery chambers 13 exceeds a predetermined upper limit value Wa (a value requiring regeneration) (step S12). If it determines that the amount of carbon dioxide adsorbed in all recovery chambers 13 exceeds the upper limit value Wa, the control device 2b controls the regeneration warning means 5 to warn the user that CO2 cannot be recovered. It then prompts the user to regenerate or replace the adsorption cartridge 20 (step S13).

[0107] On the other hand, if it is determined that the amount of carbon dioxide adsorbed in all recovery chambers 13 does not exceed the upper limit value Wa, the control device 2b determines whether the amount of carbon dioxide adsorbed in any of the recovery chambers 13 (here, recovery chamber A) exceeds the upper limit value Wa (step S14). If, as a result, it is determined that the amount of carbon dioxide adsorbed in all recovery chambers 13 has not reached the upper limit value Wa, the control device 2b returns (No in step S14).

[0108] On the other hand, if the control device 2b determines that the amount of carbon dioxide adsorbed in recovery chamber A exceeds the upper limit value Wa, it starts the desorption process, the transfer process, and the recovery process. That is, the control device 2b controls the water supply pump 31b, the water supply piping 31c, and the on / off valve 33 of the water supply piping corresponding to recovery chamber A, and supplies water to recovery chamber A (step S15).

[0109] Subsequently, once the entire adsorption cartridge 20 in recovery chamber A is wet and a sufficient time t1 has elapsed for the adsorbed carbon dioxide to be desorbed (Yes in step S16), the control device 2b transfers the water (water containing carbon dioxide) accumulated in recovery chamber A to another recovery chamber 13 (referred to here as recovery chamber B) (step S17). Recovery chamber B is preferably recovery chamber 13, which has the largest difference between the adsorption amount and its upper limit value Wa.

[0110] Specifically, the water supply to recovery chamber A is stopped, the shut-off valves 33 for the return water piping corresponding to recovery chamber A and the water supply piping corresponding to recovery chamber B are opened, and then the water pump 31b is activated again. As a result, the water from recovery chamber A is transferred to recovery chamber B by the water pump 31b.

[0111] As a result, the adsorption cartridge 20 in recovery chamber B becomes wet with water transferred from recovery chamber A. Since this water contains carbon dioxide recovered in recovery chamber A, the adsorbent material 20a in recovery chamber B can adsorb the carbon dioxide recovered in recovery chamber A. Carbon dioxide can be transferred between recovery chambers 13.

[0112] Such transfer processes are usually carried out from a recovery chamber 13 with a low packing density of adsorbent material 20a to a recovery chamber 13 with a higher packing density of adsorbent material 20a.

[0113] However, this is not always the case. For example, if the frequency of high-speed driving is extremely high and the frequency of medium-speed driving is extremely low, it may be necessary to perform a transfer process from a recovery chamber 13 with a high packing density of adsorbent material 20a to a recovery chamber 13 with a lower packing density of adsorbent material 20a. Even in such cases, as shown in Figure 7, if a water supply pump 31b or the like is provided, the transfer process can be performed between any two recovery chambers 13.

[0114] Then, when the water transfer is complete (Yes in step S18), the control device 2b stops the water supply pump 31b and closes the opened on-off valve 33, opening the recovery chamber A (step S19). Specifically, the air intake 15 of the recovery chamber A is opened to promote the drying of the wet adsorption cartridge 20 in the recovery chamber A. If a rear shutter 12e is provided separately, the air intake 15 and air outlet 16 of the recovery chamber A may also be opened.

[0115] Then, once the entire adsorption cartridge 20 in recovery chamber B is wet and a sufficient amount of dissolved carbon dioxide has been adsorbed (Yes in step S20), the control device 2b also opens recovery chamber B (step S21). Specifically, the air intake 15 of recovery chamber B is opened to promote drying of the wet adsorption cartridge 20 in recovery chamber B. If a rear shutter 12e is provided separately, the air intake 15 and air outlet 16 of recovery chamber B may also be opened.

[0116] The control device 2b also resets the adsorption amount in recovery chamber A and adds the adsorption amount in recovery chamber A to the adsorption amount in recovery chamber B (step S22). Then, the control device 2b determines, based on the amount of air passing through, whether the adsorption cartridges 20 in recovery chambers A and B have dried and whether their performance has been restored (step S23).

[0117] As a result, when it is determined that these adsorption cartridges 20 have dried out, the CO2 recovery mode is executed (step S24). At this time, the adsorption performance of the adsorption cartridge 20 in recovery chamber A is restored, and the adsorption performance of the other recovery chambers 13 remains, so carbon dioxide recovery can be carried out effectively.

[0118] This series of processes is carried out in all recovery chambers 13 until the amount of carbon dioxide adsorbed exceeds the upper limit value Wa. This allows the adsorbent material 20a in each recovery chamber 13 to be used efficiently without waste, and reduces the frequency of regeneration of the adsorption cartridge 20.

[0119] For example, if the amount of carbon dioxide adsorbed in the first recovery chamber 13a exceeds the upper limit Wa, and that carbon dioxide is transferred to the second recovery chamber 13b, the adsorbent material 20a in the first recovery chamber 13a will be regenerated, and the amount of carbon dioxide adsorbed in the second recovery chamber 13b will increase. If this process is repeated, the amount of carbon dioxide adsorbed in the second recovery chamber 13b will exceed the upper limit Wa.

[0120] Next, the adsorbent 20a in the second recovery chamber 13b is regenerated, and the carbon dioxide is transferred to the third recovery chamber 13c. The amount of carbon dioxide adsorbed in the third recovery chamber 13c increases. As this process is repeated, only one recovery chamber 13 becomes capable of adsorbing carbon dioxide. Finally, the amount of carbon dioxide adsorbed in that recovery chamber 13 also exceeds the upper limit value Wa. In other words, the amount of carbon dioxide adsorbed in all recovery chambers 13 exceeds the upper limit value Wa.

[0121] <Second Application Example> In the first application example, the carbon dioxide recovery device 2 is equipped with a water supply pump 31b, allowing for free supply and return of water between the two recovery chambers 13. In contrast, the second application example illustrates a carbon dioxide recovery device 2 without a water supply pump 31b (second application device 50).

[0122] Figure 10 illustrates the structure of the second application device 50. The basic structure of the second application device 50 is the same as that of the first application device 30 described above. Therefore, the same reference numerals are used for components of the same nature, and their explanations are simplified or omitted.

[0123] However, in the case of the second application device 50, the recovery chambers 13 are configured to overlap vertically. Furthermore, the packing density of the adsorbent 20a is configured to be higher in the lower recovery chamber 13 than in the upper recovery chamber 13. In addition, the water storage tank 31a is positioned higher than the housing 10.

[0124] In the case of the second application device 50, one end of the first water supply pipe 32a is connected to the water storage tank 31a, and the other end of the first water supply pipe 32a is connected to the water spray plate 35a of the first recovery chamber 13a. One end of the second water supply pipe 32b is connected to the water storage tank 31a, and the other end of the second water supply pipe 32b is connected to the water spray plate 35b of the second recovery chamber 13b. One end of the third water supply pipe 32c is connected to the water storage tank 31a, and the other end of the third water supply pipe 32c is connected to the water spray plate 35c of the third recovery chamber 13c.

[0125] One end of the first return water pipe 32d is connected to the outlet of the first recovery chamber 13a, and the other end of the first return water pipe 32d is connected to a portion of the second water supply pipe 32b downstream of the on-off valve 33. One end of the second return water pipe 32e is connected to the outlet of the second recovery chamber 13b, and the other end of the second return water pipe 32e is connected to a portion of the third water supply pipe 32c downstream of the on-off valve 33. On the other hand, in the second application device 50 of this embodiment, the third return water pipe 32f is not provided.

[0126] The control device 2b and related equipment associated with the regeneration of the adsorbent 20a in the second application device 50 are almost the same as those in the first application device 30. That is, the second application device 50 differs from the first application device 30 in that the water supply pump 31b is absent in Figure 8. Furthermore, the arrangement of the on-off valve 33 in the second application device 50 differs in that it corresponds to the structure shown in Figure 10 as described above.

[0127] Figure 11 shows an example of the control of the control device 2b in the desorption / transfer mode of the second application device 50. During application startup, the control device 2b accumulates the amount of air that has passed through each recovery chamber 13 (step S30). Then, it calculates the amount of carbon dioxide adsorbed from the accumulated amount of air (step S31).

[0128] The control device 2b then determines whether the amount of carbon dioxide adsorbed in all recovery chambers 13 exceeds a predetermined upper limit value Wa (a value requiring regeneration) (step S32). If it determines that the amount of carbon dioxide adsorbed in all recovery chambers 13 exceeds the upper limit value Wa, the control device 2b controls the regeneration warning means 5 to warn the user that CO2 cannot be recovered. It then prompts the user to regenerate or replace the adsorption cartridge 20 (step S33).

[0129] On the other hand, if it is determined that the amount of carbon dioxide adsorbed in all recovery chambers 13 does not exceed the upper limit value Wa, the control device 2b determines whether the amount of carbon dioxide adsorbed in any of the recovery chambers 13 (here, recovery chamber A) exceeds the upper limit value Wa (step S34). If it is determined that the amount of carbon dioxide adsorbed in all recovery chambers 13 has not reached the upper limit value Wa, the control device 2b returns (No in step S34).

[0130] On the other hand, if the control device 2b determines that the amount of carbon dioxide adsorbed in recovery chamber A exceeds the upper limit value Wa, it starts the desorption process, the transfer process, and the recovery process. Specifically, the control device 2b controls the on / off valve 33 of the water supply piping corresponding to recovery chamber A and supplies water from the water storage tank 31a to recovery chamber A (step S35).

[0131] Subsequently, once the entire adsorption cartridge 20 in recovery chamber A is wet and a sufficient amount of adsorbed carbon dioxide has been desorbed (Yes in step S36), the control device 2b transfers the water (water containing carbon dioxide) accumulated in recovery chamber A to the recovery chamber 13 directly below (referred to as recovery chamber B in this case) (step S37).

[0132] Specifically, the water supply to recovery chamber A is stopped, and the shut-off valve 33 of the return water piping corresponding to recovery chamber A is opened. As a result, the water from recovery chamber A flows down and is transferred to recovery chamber B.

[0133] As a result, the adsorption cartridge 20 in recovery chamber B becomes wet with water transferred from recovery chamber A. Since this water contains carbon dioxide recovered in recovery chamber A, the adsorbent material 20a in recovery chamber B can adsorb the carbon dioxide recovered in recovery chamber A. In the case of the second application device 50, gravity can be used to transfer carbon dioxide from the upper to the lower side between the two overlapping recovery chambers 13.

[0134] Then, when the water transfer is complete (Yes in step S38), the control device 2b closes the opened on-off valve 33 and opens the recovery chamber A (step S39). Specifically, it opens the air intake 15 of the recovery chamber A to promote the drying of the wet adsorption cartridge 20 in the recovery chamber A. If a rear shutter 12e is provided separately, the air intake 15 and air outlet 16 of the recovery chamber A may also be opened.

[0135] Then, once the entire adsorption cartridge 20 in recovery chamber B is wet and a sufficient amount of dissolved carbon dioxide has been adsorbed (Yes in step S40), the control device 2b also opens recovery chamber B (step S41). Specifically, the air intake 15 of recovery chamber B is opened to promote the drying of the wet adsorption cartridge 20 in recovery chamber B. If a rear shutter 12e is provided separately, the air intake 15 and air outlet 16 of recovery chamber B may also be opened.

[0136] The control device 2b also resets the adsorption amount in recovery chamber A and adds the adsorption amount in recovery chamber A to the adsorption amount in recovery chamber B (step S42). Then, the control device 2b determines, based on the amount of air passing through, whether the adsorption cartridges 20 in recovery chambers A and B have dried and whether their performance has been restored (step S43).

[0137] As a result, when it is determined that these adsorption cartridges 20 have dried out, the CO2 recovery mode is executed (step S44). At this time, the adsorption performance of the adsorption cartridge 20 in recovery chamber A is restored, and the adsorption performance of the other recovery chambers 13 remains, so carbon dioxide recovery can be performed effectively.

[0138] This series of processes is carried out in all recovery chambers 13 until the amount of carbon dioxide adsorbed exceeds the upper limit value Wa. This allows the adsorbent material 20a in each recovery chamber 13 to be used efficiently without waste, and reduces the frequency of regeneration of the adsorption cartridge 20.

[0139] For example, if the amount of carbon dioxide adsorbed in the first recovery chamber 13a exceeds the upper limit Wa, and that carbon dioxide is transferred to the second recovery chamber 13b, the adsorbent material 20a in the first recovery chamber 13a will be regenerated, and the amount of carbon dioxide adsorbed in the second recovery chamber 13b will increase. If this process is repeated, the amount of carbon dioxide adsorbed in the second recovery chamber 13b will exceed the upper limit Wa.

[0140] Next, the adsorbent 20a in the second recovery chamber 13b is regenerated, and the carbon dioxide is transferred to the third recovery chamber 13c. The amount of carbon dioxide adsorbed in the third recovery chamber 13c increases. As this process is repeated, only the first recovery chamber 13a becomes capable of adsorbing carbon dioxide. Finally, the amount of carbon dioxide adsorbed in the first recovery chamber 13a also exceeds the upper limit value Wa. In other words, the amount of carbon dioxide adsorbed in all recovery chambers 13 exceeds the upper limit value Wa.

[0141] Furthermore, the disclosed technology is not limited to the embodiments described above, but also encompasses various other configurations.

[0142] For example, in the embodiment, the adsorbent 20a is shown to be detachable from the vehicle 1 together with the housing 10, but the adsorption cartridge 20 may be detachable from the housing 10 independently. From the viewpoint of carbon dioxide reuse and convenience, a humidity swing type adsorbent is preferred, but a temperature swing type or a pressure swing type may also be used.

[0143] The adsorbent material 20a may be configured to have a density difference in the direction of travel of the moving body, such that the density is higher on the front side than on the rear side in the direction of travel (the surface area of ​​the adsorbent material 20a is larger). Since carbon dioxide is adsorbed from the front side in the direction of travel, adsorption can be performed efficiently.

[0144] The number of recovery chambers 13 is not limited to three. There may be two, or four or more. The number of recovery chambers 13 can be selected according to the specifications. The detachment and transfer modes of the first and second application examples may be performed while the vehicle 1 is in motion or while it is parked. Furthermore, if the vehicle 1 is parked, some or all of the processing performed by the control device 2b in the detachment and transfer mode may be performed manually. [Explanation of Symbols]

[0145] 1. Vehicle (mobile object) 1a Roof Panel 2. Carbon dioxide capture device 2a CO2 recovery unit 2b Control device 3. Vehicle speed sensor 4. Rain / Snow Sensor 5 Regeneration warning means 10 cabinets 11 Assembly base 12 Cover Cases 13. Collection Room 13a First Recovery Room 13b Second Retrieval Room 13c Third Recovery Room 15 Air intake 16. Air outlet 20 Adsorption Cartridges 20a Adsorbent 30. First Application Device 31 Water supply section 32 Waterway 33. Shut-off valves 35 Sprinkler Plate 36a Adsorption amount calculation section 36b Desorption section 36c Recovery Processing Unit 50. Second application device

Claims

1. A mobile carbon dioxide capture device that takes in air while in motion and captures carbon dioxide from the atmosphere, A housing attached to the aforementioned mobile body, The carbon dioxide adsorbent housed in the aforementioned enclosure, A control device for controlling carbon dioxide capture, Equipped with, The aforementioned enclosure is Multiple recovery chambers extending in the direction of travel of the moving body, An openable and closable air intake is provided on the front of the recovery chamber for taking in air, An air outlet for discharging air is provided on the rear of the aforementioned recovery chamber, It has, Carbon dioxide recovery device wherein the adsorbent is filled in each of the recovery chambers at different densities, and the control device controls the opening and closing state of each of the air intake ports according to the movement speed of the mobile body so that air is drawn into the recovery chamber with a higher filling density at higher speeds than at lower speeds.

2. In the carbon dioxide recovery apparatus described in claim 1, The aforementioned recovery chamber is The first recovery chamber has the lowest filling density, A second recovery chamber, which has the next highest packing density after the first recovery chamber, It contains at least a small amount of When the moving body is moving within a predetermined first speed range at the lowest speed, the control device performs a first opening / closing control to open the air intake of the first recovery chamber, and when the moving body is moving within a second speed range, which is the next highest speed range after the first speed range, the control device performs a second opening / closing control to open the air intake of the second recovery chamber and close the air intake of the first recovery chamber. Carbon dioxide recovery device, wherein the recovery chamber includes a third recovery chamber having the second highest packing density after the second recovery chamber, and when the moving body is moving in a third speed range that is the second highest after the second speed range, the control device performs a third opening / closing control, opening the air intake of the third recovery chamber and closing the air intakes of the first and second recovery chambers.

3. In the carbon dioxide recovery apparatus described in claim 1, A carbon dioxide capture device in which the outer surface of the housing, which extends along the direction of travel of the moving body, is formed to be streamlined.

4. In the carbon dioxide recovery apparatus described in claim 1, A carbon dioxide recovery device in which a humidity-swinging type adsorbent is used as the adsorbent, which adsorbs carbon dioxide in a dry state and desorbs carbon dioxide in a wet state.

5. In the carbon dioxide recovery apparatus described in claim 4, A water supply unit that enables the supply of water to the aforementioned recovery chamber, A waterway that allows water to be transferred between each of the aforementioned recovery chambers, A shut-off valve installed in the aforementioned waterway, Furthermore, A carbon dioxide recovery apparatus in which the control device controls the on / off valve according to the adsorption state of each of the adsorbents in the recovery chamber.

6. In the carbon dioxide recovery apparatus described in claim 5, A carbon dioxide recovery apparatus, wherein when any of the recovery chambers becomes a high-adsorption recovery chamber with an adsorption amount of the adsorbent exceeding a predetermined value, the control device controls the water supply unit to supply water to the high-adsorption recovery chamber to perform a desorption process to wet the adsorbent, and then controls the on-off valve to perform a transfer process to transfer the water from the high-adsorption recovery chamber to a low-adsorption recovery chamber where the adsorption amount of the adsorbent is less than the predetermined value.

7. In the carbon dioxide recovery apparatus according to any one of claims 1 to 6, The aforementioned mobile device is a car, a carbon dioxide capture device.

8. A method for capturing carbon dioxide from the atmosphere, A recovery step of adsorbing carbon dioxide onto the adsorbent using the carbon dioxide recovery apparatus described in claim 4, A removal step of removing the housing or the suction material from the moving body, A regeneration step in which the adsorbent is made wet to remove carbon dioxide, A mounting step of attaching the housing or the suction material to the moving body, A method for capturing carbon dioxide, including [the specified substance].

9. A method for recovering carbon dioxide according to claim 8, A method for recovering carbon dioxide, comprising a reuse step for reusing the carbon dioxide removed in the regeneration step.

10. A method for capturing carbon dioxide from the atmosphere, A recovery step of adsorbing carbon dioxide onto the adsorbent using the carbon dioxide recovery apparatus described in claim 5, When any of the recovery chambers becomes a high-adsorption recovery chamber with an adsorption amount of the adsorbent exceeding a predetermined value, a desorption step is performed in which water is supplied to the high-adsorption recovery chamber to wet the adsorbent, A transfer step of transferring the water from the high-adsorption recovery chamber to the low-adsorption recovery chamber, where the amount of adsorption of the adsorbent is less than the predetermined value, A recovery step of drying the wet adsorbent material in the high-adsorption recovery chamber and the low-adsorption recovery chamber, A method for capturing carbon dioxide, including [the specified substance].

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