Atmospheric carbon dioxide separation / recovery apparatus

Abstract

An atmospheric carbon dioxide separation / recovery apparatus according to one embodiment of the present disclosure comprises: an adsorption treatment chamber for performing an adsorption treatment in which the atmosphere is brought into contact with a particulate adsorption material accommodated in the interior, with carbon dioxide contained in said atmosphere thereby being adsorbed onto the adsorption material; and a regeneration treatment chamber for performing a regeneration treatment in which, with the interior at a negative pressure, low-temperature steam is brought into contact with adsorption material, with carbon dioxide thereby being desorbed from the adsorption material. The adsorption treatment chamber takes in adsorption material regenerated in the regeneration treatment chamber and performs the adsorption treatment by using the taken-in adsorption material. The regeneration treatment chamber takes in adsorption material used for the adsorption treatment in the adsorption treatment chamber and performs the regeneration treatment on the taken-in adsorption material.

Description

Atmospheric carbon dioxide separation and capture equipment

[0001] The present disclosure relates to an atmospheric carbon dioxide separation and capture facility that separates and captures carbon dioxide from the atmosphere.

[0002] Patent Document 1 listed below discloses a technology in which carbon dioxide in the air is adsorbed onto a particulate adsorbent, and then the carbon dioxide is separated from the adsorbent using steam, which is a form of process heat, to regenerate the adsorbent.

[0003] Japanese Patent Application Laid-Open No. 2022-20723

[0004] In atmospheric carbon dioxide separation and capture equipment, if high-temperature steam is used to regenerate the adsorbent, the adsorbent can be regenerated efficiently. However, generating high-temperature steam requires a large amount of energy, and emitting carbon dioxide to obtain that energy would be counter to the original purpose. Furthermore, even if high-temperature steam could be generated using waste heat from some equipment, the high-temperature steam has high utility value and would be competed for with other equipment. Therefore, the present disclosure aims to provide an atmospheric carbon dioxide separation and capture equipment that can regenerate the adsorbent using low-temperature steam.

[0005] An atmospheric carbon dioxide separation and capture equipment according to one embodiment of the present disclosure comprises an adsorption treatment chamber that performs an adsorption treatment in which the air is brought into contact with a particulate adsorbent contained therein, thereby adsorbing carbon dioxide contained in the air onto the adsorbent, and a regeneration treatment chamber that performs a regeneration treatment in which low-temperature steam is brought into contact with the adsorbent under a negative pressure inside, thereby desorbing carbon dioxide from the adsorbent, wherein the adsorption treatment chamber takes in the adsorbent that has been regenerated in the regeneration treatment chamber and performs the adsorption treatment using the taken-in adsorbent, and the regeneration treatment chamber takes in the adsorbent that was used for the adsorption treatment in the adsorption treatment chamber and performs the regeneration treatment on the taken-in adsorbent.

[0006] According to this configuration, it is possible to provide an atmospheric carbon dioxide separation and capture facility that is capable of regenerating the adsorbent using low-temperature steam.

[0007] Fig. 1 is a conceptual diagram of an atmospheric carbon dioxide separation and capture system. Fig. 2 is a view of an adsorption treatment chamber as seen from the inlet side. Fig. 3 is a view of an adsorption treatment chamber as seen from the outlet side.

[0008] (Overall Configuration) An embodiment will now be described. First, the overall configuration of an atmospheric carbon dioxide separation and capture system (hereinafter referred to as "separation and capture system") 100 according to an embodiment will be described. FIG. 1 is a conceptual diagram of the separation and capture system 100. The separation and capture system 100 is a system that separates and captures carbon dioxide from the atmosphere. In other words, the separation and capture system 100 is a Direct Air Capture (DAC) system.

[0009] 1, the separation and recovery equipment 100 includes an adsorption chamber 10, a regeneration chamber 20, a temperature adjustment device 30, and a suction device 40. These components will be described below in order.

[0010] <Adsorption Treatment Chamber> The adsorption treatment chamber 10 is a chamber where adsorption treatment is performed, in which carbon dioxide in the atmosphere is adsorbed onto an adsorbent. Although two adsorption treatment chambers 10 are depicted in FIG. 1 , the number of adsorption treatment chambers 10 included in the separation and recovery equipment 100 is not limited. The adsorbent used in the adsorption treatment is an adsorbent that has been regenerated in a regeneration treatment chamber 20, which will be described later. The adsorption treatment chamber 10 takes in the adsorbent that has been regenerated in the regeneration treatment chamber 20, and performs adsorption treatment using the taken-in adsorbent. Air comes into contact with the adsorbent by passing through the inside of the adsorption treatment chamber 10, in which the adsorbent is housed. As a result, carbon dioxide in the atmosphere is adsorbed onto the adsorbent and recovered.

[0011] The adsorbent of this embodiment is particulate and is a porous carrier impregnated with an amine. However, the adsorbent is not limited to the above. The adsorbent has the characteristic that the amount of carbon dioxide it can adsorb increases as the temperature decreases and as the ambient pressure increases. Therefore, carbon dioxide adsorbed to the adsorbent is desorbed from the adsorbent as the temperature of the adsorbent is increased, and is also desorbed from the adsorbent as the ambient pressure is decreased.

[0012] The adsorption treatment chamber 10 has a plate-like shape and extends vertically. The adsorption treatment chamber 10 includes an inlet surface 11, which is one of the main surfaces, and an outlet surface 12, which is the other main surface. FIG. 2 is a view of the adsorption treatment chamber 10 from the inlet surface 11 side, and FIG. 3 is a view of the adsorption treatment chamber 10 from the outlet surface 12 side. The inlet surface 11 and the outlet surface 12 are formed, for example, of a mesh-like member. As shown in FIG. 2, atmospheric air flows from the outside of the adsorption treatment chamber 10 into the inside of the adsorption treatment chamber 10 through the inlet surface 11. Furthermore, as shown in FIG. 3, the atmospheric air that has flowed into the inside of the adsorption treatment chamber 10 passes through gaps in the adsorbent and flows out of the adsorption treatment chamber 10 through the outlet surface 12.

[0013] The adsorption treatment chamber 10 includes a supply port 13 for taking in the adsorbent and a discharge port 14 for discharging the used adsorbent. In this embodiment, the supply port 13 is located at the upper end portion of the adsorption treatment chamber 10, and the discharge port 14 is located at the lower end portion of the adsorption treatment chamber 10. As shown in Fig. 1, the adsorbent discharged from the adsorption treatment chamber 10 is transferred to the regeneration treatment chamber 20 by a transfer device 15 and supplied to the regeneration treatment chamber 20. The transfer device 15 is, for example, a bucket conveyor or an air conveyor. However, if the regeneration treatment chamber 20 is located below the adsorption treatment chamber 10, the adsorbent may be supplied from the adsorption treatment chamber 10 to the regeneration treatment chamber 20 by utilizing the adsorbent's own weight.

[0014] <Regeneration Treatment Chamber> The regeneration treatment chamber 20 is a chamber where a regeneration treatment is performed to desorb carbon dioxide from the adsorbent. The adsorbent to be regenerated is the adsorbent used in the adsorption treatment in the adsorption treatment chamber 10. The regeneration treatment chamber 20 takes in the adsorbent used in the adsorption treatment in the adsorption treatment chamber 10, and performs the regeneration treatment by bringing steam into contact with the taken-in adsorbent. The regeneration treatment chamber 20 in this embodiment is a sealable container. The regeneration treatment chamber 20 includes a supply port 21 for taking in the adsorbent used in the adsorption treatment, and a discharge port 22 for discharging the regenerated adsorbent. In this embodiment, the supply port 21 is located at the upper end portion of the regeneration treatment chamber 20, and the discharge port 22 is located at the lower end portion of the regeneration treatment chamber 20.

[0015] The carbon dioxide desorbed from the adsorbent during the regeneration process is discharged to a carbon dioxide holder (not shown) or the like by a discharge pump 23. The regeneration process chamber 20 may be located below the adsorption process chamber 10, above the adsorption process chamber 10, or at the same height as the adsorption process chamber 10.

[0016] One regeneration method involves increasing the temperature of the adsorbent. This method typically involves indirect heating, in which the adsorbent is heated by applying heat to the wall of a tower containing the adsorbent. However, this type of indirect heating does not transfer heat well to adsorbents located near the center of the tower. Furthermore, when the adsorbent is particulate, heat is transferred to each adsorbent via contact points between adjacent adsorbents, resulting in poor heat transfer efficiency. In contrast, this embodiment uses steam to perform the regeneration process, allowing the steam to penetrate the gaps between the adsorbents and directly heat the particulate adsorbent. This results in a higher heat utilization efficiency than indirect heating. However, regeneration using heating alone requires high-temperature steam of approximately 100°C. Such high-temperature steam requires a large amount of energy to generate. Even if high-temperature steam can be generated using waste heat from some facility, high-temperature steam has high utility as a heat source, resulting in competition with other facilities, such as power generation facilities.

[0017] Therefore, in this embodiment, in addition to the method of increasing the temperature of the adsorbent using steam, a method of reducing the pressure around the adsorbent is also implemented as a regeneration method, thereby suppressing the temperature of the steam used. Specifically, the adsorbent supplied from the adsorption treatment chamber 10 is taken into the regeneration treatment chamber 20, and low-temperature steam is brought into contact with the taken-in adsorbent while the inside of the regeneration treatment chamber 20 is kept at negative pressure. To create negative pressure inside the regeneration treatment chamber 20, for example, an exhaust pump 23 that transports carbon dioxide from the regeneration treatment chamber 20 can be used. Note that "low-temperature steam" refers to steam at 100°C or below, for example.

[0018] In this embodiment, the internal pressure of the regeneration chamber 20 is kept negative, so that carbon dioxide can be sufficiently desorbed from the adsorbent even if the steam used in the regeneration process is low temperature. Furthermore, by using low-temperature steam in the regeneration process, the energy required for steam generation can be reduced, and unused low-temperature steam can be utilized. Therefore, the energy consumption of the separation and recovery system 100 as a whole can be reduced.

[0019] Furthermore, the use of low-temperature steam in the regeneration process can be expected to have the secondary effect of suppressing the deterioration of the adsorbent. In adsorbents carrying amines, the carbon dioxide absorption capacity decreases due to deterioration such as amine volatilization, thermal degradation, and oxidative degradation. However, the lower the temperature of the steam used, the more this deterioration is suppressed. Therefore, according to this embodiment, the frequency of replacement of the adsorbent decreases compared to when a general regeneration process using a high-temperature heat source is performed.

[0020] The regenerated adsorbent is discharged from the discharge port 22 of the regeneration chamber 20. The adsorbent discharged from the regeneration chamber 20 is transferred to the adsorption chamber 10 by a transfer device 24 and supplied to the adsorption chamber 10. The transfer device 24 is, for example, a bucket conveyor or an air conveyor. However, if the adsorption chamber 10 is located below the regeneration chamber 20, the adsorbent may be supplied from the regeneration chamber 20 to the adsorption chamber 10 by utilizing the adsorbent's own weight.

[0021] Furthermore, unlike the present embodiment, in facilities where the adsorption treatment and the regeneration treatment are performed in the same treatment chamber, the treatment chamber is cooled by the air passing through it during the absorption treatment, and therefore the cooled treatment chamber needs to be reheated using steam or a heating device when the subsequent regeneration treatment is performed. In contrast, in the present embodiment, the treatment chambers are separated, so the reheating is not necessary, and energy consumption can be reduced.

[0022] <Temperature Adjustment Device> The temperature adjustment device 30 is a device that keeps the regeneration processing chamber 20 warm or heats it. The temperature adjustment device 30 of this embodiment heats the regeneration processing chamber 20 so that the internal temperature of the regeneration processing chamber 20 is equal to or higher than a specified value during the regeneration processing. The specified value here is, for example, 50 to 100°C. This allows carbon dioxide to be sufficiently desorbed from the adsorbent while further reducing the energy of the steam used.

[0023] <Suction Device> The suction device 40 is a device that sucks the atmosphere inside the adsorption treatment chamber 10. As shown in Fig. 3, the suction device 40 is located outside the adsorption treatment chamber 10, on the side of the outflow surface 12. In this embodiment, the suction device 40 is, for example, a fan, but the suction device 40 is not limited to this and may be, for example, a pipe connected to a negative pressure tank or a negative pressure chimney. Note that the separation and recovery equipment 100 may be provided with, instead of the suction device 40, an air supply device such as a fan that supplies atmosphere to the inflow surface 11 of the adsorption treatment chamber 10.

[0024] The suction device 40 sucks in the air inside the adsorption treatment chamber 10 through the outlet surface 12 of the adsorption treatment chamber 10, causing the air to flow from the outside of the adsorption treatment chamber 10 into the inside of the adsorption treatment chamber 10 through the inlet surface 11. In this way, in this embodiment, the air is flowed into the adsorption treatment chamber 10 using the suction device 40, rather than using a blower that sends the air toward the inlet surface 11 of the adsorption treatment chamber 10.

[0025] Therefore, according to this embodiment, it is possible to prevent the temperature of the air flowing into the adsorption treatment chamber 10 from increasing due to passage through the air blower. As described above, the lower the temperature of the adsorbent, the easier it is to adsorb carbon dioxide. In this embodiment, however, air with a relatively low temperature flows into the adsorption treatment chamber 10, so that the temperature increase of the adsorbent due to the air is suppressed, and the adsorption treatment can be carried out efficiently.

[0026] (Operation of Separation and Recovery Equipment) Next, the operation of the separation and recovery equipment 100 will be described. Here, for simplicity of explanation, it is assumed that the separation and recovery equipment 100 is equipped with two adsorption treatment chambers 10 and one regeneration treatment chamber 20. Also, it is assumed that the volume of each adsorption treatment chamber 10 is equal to the volume of the regeneration treatment chamber 20. Furthermore, it is assumed that the adsorption treatment time is twice the regeneration treatment time. Specifically, it is assumed that the adsorption treatment time is 2 hours and the regeneration treatment time is 1 hour. Here, the "adsorption treatment time" refers to the time of adsorption treatment performed using the adsorbent from the time the adsorption treatment chamber 10 takes in the adsorbent until it discharges it. Also, the "regeneration treatment time" refers to the time of regeneration treatment performed on the adsorbent from the time the regeneration treatment chamber 20 takes in the adsorbent until it discharges it.

[0027] First, the separation and recovery equipment 100 simultaneously performs adsorption and regeneration processes. The adsorption processes are performed in each of the two adsorption chambers 10. Specifically, with both adsorption chambers 10 containing adsorbents, the corresponding suction devices 40 are driven. As a result, atmospheric air flows into both adsorption chambers 10 and passes through the interiors, and carbon dioxide in the atmosphere is adsorbed onto the adsorbents and recovered.

[0028] On the other hand, in the regeneration process, the adsorbent used in the adsorption process is placed in the regeneration process chamber 20, and the regeneration process chamber 20 is sealed. Then, low-temperature steam is supplied to the regeneration process chamber 20 while the inside of the regeneration process chamber 20 is under negative pressure. This causes carbon dioxide to desorb from the adsorbent, and the adsorbent is regenerated. At this time, the temperature adjustment device 30 maintains the temperature inside the regeneration process chamber 20 at or above a specified value by insulating or heating the regeneration process chamber 20.

[0029] Next, the regeneration process is carried out for one hour, and when the regeneration process is completed, the suction device 40 corresponding to one of the two adsorption process chambers 10 is stopped, and the adsorption process of that one adsorption process chamber 10 is completed. At this time, the adsorption process of the other of the two adsorption process chambers 10 continues.

[0030] After the adsorption treatment, the adsorption treatment chamber 10 discharges all of the adsorbent used in the adsorption treatment and supplies it to the regeneration treatment chamber 20. At the same time, the regeneration treatment chamber 20 discharges all of the adsorbent that has been regenerated and supplies it to the adsorption treatment chamber 10 that has completed the adsorption treatment. In other words, the adsorbent is exchanged between the adsorption treatment chamber 10 that has completed the adsorption treatment and the regeneration treatment chamber 20.

[0031] Next, the regeneration process is resumed in the regeneration process chamber 20, and the adsorption process is resumed in the adsorption process chamber 10 where the adsorbent has been replaced. After that, the regeneration process is carried out for one hour, and when the regeneration process is completed, the adsorbent is replaced between the adsorption process chamber 10 other than the one where the adsorbent was replaced and the regeneration process chamber 20. After the replacement of the adsorbent is completed, the regeneration process is resumed in the regeneration process chamber 20, and the adsorption process is resumed in the adsorption process chamber 10 where the adsorbent has been replaced.

[0032] In this way, by alternately replacing the adsorbent in the two adsorption treatment chambers 10 every hour, the adsorbent is replaced every hour in the regeneration treatment chamber 20, and the adsorbent is replaced every two hours in each adsorption treatment chamber 10. By repeating the above cycle, the adsorption treatment and the regeneration treatment can be performed continuously even if the adsorption treatment time (2 hours in the above example) and the regeneration treatment time (1 hour in the above example) are different.

[0033] The operation of the separation and recovery equipment 100 has been described above, but the operation of the separation and recovery equipment 100 is not limited to the above. For example, although the adsorbent in the adsorption treatment chamber 10 is replaced all at once in the above, the adsorbent may be replaced in the adsorption treatment chamber 10 in multiple batches. Furthermore, the absorbent discharged from the regeneration treatment chamber 20 may be temporarily stored in a container (not shown) and then supplied to the adsorption treatment chamber 10 from the container.

[0034] Furthermore, although the adsorption treatment time is twice the regeneration treatment time in the above description, the adsorption treatment time may be more than twice the regeneration treatment time. The separation and recovery equipment 100 according to this embodiment adsorbs atmospheric carbon dioxide into the adsorbent, but the amount of carbon dioxide contained in the atmosphere is much less than the amount of carbon dioxide contained in the exhaust gas. Therefore, the adsorbent can adequately adsorb carbon dioxide even when exposed to the atmosphere for a long period of time. Therefore, by ensuring a long adsorption treatment time, as in this embodiment, the capacity of the adsorbent can be fully utilized, enabling efficient adsorption treatment.

[0035] Furthermore, as described above, the separation and recovery system 100 according to this embodiment supplies the adsorbent regenerated in the regeneration treatment chamber 20 directly to the adsorption treatment chamber 10. In other words, the adsorbent that has come into contact with steam in the regeneration treatment chamber 20 is supplied to the adsorption treatment chamber 10 while still wet. In the separation and recovery system 100 according to this embodiment, the adsorption treatment time is long as described above, and therefore the adsorbent contained in the adsorption treatment chamber 10 is exposed to the flowing atmosphere for a long period of time. Therefore, a drying treatment can be performed in the adsorption treatment chamber 10, using the atmosphere to dry the adsorbent. Therefore, according to this embodiment, by performing the drying treatment simultaneously with the adsorption treatment in the adsorption treatment chamber 10, the drying treatment chamber can be omitted, the configuration of the separation and recovery system 100 can be simplified, and the energy consumption of the separation and recovery system 100 can also be reduced.

[0036] (Summary) The first item disclosed in this specification is an atmospheric carbon dioxide separation and capture facility that includes an adsorption treatment chamber that performs an adsorption treatment in which atmospheric air is brought into contact with a particulate adsorbent contained therein, thereby causing carbon dioxide contained in the air to be adsorbed onto the adsorbent, and a regeneration treatment chamber that performs a regeneration treatment in which low-temperature steam is brought into contact with the adsorbent while the interior is kept under negative pressure, thereby causing carbon dioxide to be desorbed from the adsorbent, wherein the adsorption treatment chamber takes in the adsorbent that has been regenerated in the regeneration treatment chamber and performs the adsorption treatment using the taken-in adsorbent, and the regeneration treatment chamber takes in the adsorbent that was used for the adsorption treatment in the adsorption treatment chamber and performs regeneration treatment on the taken-in adsorbent.

[0037] According to this configuration, even if the steam used is low temperature, carbon dioxide can be sufficiently desorbed from the adsorbent. Furthermore, by using low-temperature steam for the regeneration process, the energy required to generate the steam used for the regeneration process can be reduced, and unused low-temperature steam can be utilized. Therefore, the energy consumption of the atmospheric carbon dioxide separation and capture system as a whole can be reduced.

[0038] A second item disclosed in this specification is the atmospheric carbon dioxide separation and capture equipment described in the first item, wherein the adsorption treatment chamber takes in the adsorbent material that has come into contact with steam in the regeneration treatment chamber while it is still wet, and brings the taken-in adsorbent material into contact with atmospheric air, thereby carrying out the adsorption treatment and, at the same time, carrying out a drying treatment to dry the taken-in adsorbent material.

[0039] With this configuration, there is no need to set up a drying treatment chamber for performing drying treatment separately from the adsorption treatment chamber, which simplifies the configuration of the atmospheric carbon dioxide separation and capture equipment and also reduces the energy consumption of the atmospheric carbon dioxide separation and capture equipment.

[0040] A third item disclosed in this specification is the atmospheric carbon dioxide separation and capture equipment described in the first item, wherein the adsorption treatment time for carrying out the adsorption treatment using the adsorbent from taking in the adsorbent in the adsorption treatment chamber until discharging the adsorbent is at least twice the regeneration treatment time for carrying out the regeneration treatment on the adsorbent from taking in the adsorbent in the regeneration treatment chamber until discharging the adsorbent.

[0041] According to this configuration, a long adsorption processing time is ensured, thereby enabling efficient adsorption processing.

[0042] The fourth item disclosed in this specification is an atmospheric carbon dioxide separation and capture equipment described in any one of items 1 to 3, which is equipped with a temperature control device that keeps the regeneration processing chamber warm or heats the regeneration processing chamber so that the internal temperature of the regeneration processing chamber is equal to or higher than a specified value while regeneration processing is being carried out in the regeneration processing chamber.

[0043] According to this configuration, it is possible to further suppress the temperature of the steam used while still allowing carbon dioxide to be sufficiently desorbed from the adsorbent.

[0044] A fifth item disclosed in this specification is an atmospheric carbon dioxide separation and capture equipment described in any one of items one to four, wherein the adsorption treatment chamber includes an inlet surface through which atmospheric air flows into the interior of the adsorption treatment chamber from outside the adsorption treatment chamber, and an outlet surface through which atmospheric air flows out from the interior of the adsorption treatment chamber to the outside of the adsorption treatment chamber, and the atmospheric carbon dioxide separation and capture equipment is equipped with an suction device located outside the adsorption treatment chamber and configured to suck in atmospheric air from inside the adsorption treatment chamber through the outlet surface, thereby causing atmospheric air to flow from outside the adsorption treatment chamber into the interior of the adsorption treatment chamber through the inlet surface.

[0045] According to this configuration, the temperature of the air flowing into the adsorption treatment chamber can be suppressed, thereby suppressing a rise in the temperature of the adsorbent, and allowing the adsorption treatment to be carried out efficiently.

Claims

1. An adsorption treatment chamber that performs an adsorption treatment of adsorbing carbon dioxide contained in the atmosphere to an adsorbent by bringing the atmosphere into contact with a particulate adsorbent accommodated therein, and a regeneration treatment chamber that performs a regeneration treatment of desorbing carbon dioxide from the adsorbent by bringing low-temperature steam into contact with the adsorbent in a state where the inside is under negative pressure. The adsorption treatment chamber takes in the adsorbent regenerated in the regeneration treatment chamber and performs the adsorption treatment using the taken-in adsorbent. The regeneration treatment chamber takes in the adsorbent used for the adsorption treatment in the adsorption treatment chamber and performs the regeneration treatment on the taken-in adsorbent. An apparatus for separating and recovering carbon dioxide in the atmosphere.

2. In the adsorption treatment chamber, the adsorbent that has come into contact with steam in the regeneration treatment chamber is taken in while being wet, and the atmosphere is brought into contact with the taken-in adsorbent. While performing the adsorption treatment, a drying treatment for drying the taken-in adsorbent is also performed. The apparatus for separating and recovering carbon dioxide in the atmosphere according to claim 1.

3. The adsorption treatment time for performing the adsorption treatment using the adsorbent until the adsorbent is taken in and discharged in the adsorption treatment chamber is at least twice the regeneration treatment time for performing the regeneration treatment on the adsorbent until the adsorbent is taken in and discharged in the regeneration treatment chamber. The apparatus for separating and recovering carbon dioxide in the atmosphere according to claim 1.

4. During the regeneration treatment in the regeneration treatment chamber, a temperature adjustment device is provided to keep the regeneration treatment chamber warm or heat it so that the internal temperature of the regeneration treatment chamber is not less than a specified value. The apparatus for separating and recovering carbon dioxide in the atmosphere according to claim 1.

5. The adsorption treatment chamber includes an inflow surface through which the atmosphere flows into the adsorption treatment chamber from the outside of the adsorption treatment chamber and an outflow surface through which the atmosphere flows out of the adsorption treatment chamber from the inside of the adsorption treatment chamber. The apparatus for separating and recovering carbon dioxide in the atmosphere is located outside the adsorption treatment chamber and is provided with a suction device that sucks the atmosphere inside the adsorption treatment chamber through the outflow surface, thereby allowing the atmosphere to flow into the adsorption treatment chamber from the outside of the adsorption treatment chamber through the inflow surface. The apparatus for separating and recovering carbon dioxide in the atmosphere according to claim 1.

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