Adsorption member and carbon dioxide recovery system

Abstract

To lower a temperature necessary for regenerating an adsorbent targeting carbon dioxide.SOLUTION: An adsorption member (50) comprises a base material (B) having a plurality of holes (56) through which air flows, and an adsorbent (60) that is supported by the base material (B) and adsorbs carbon dioxide in the air. The adsorbent (60) contains an amine-based substance and ionic liquid.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to an adsorption member and a carbon dioxide recovery system.

Background Art

[0002] There is a system for recovering carbon dioxide in the air. The carbon dioxide recovery system described in Patent Document 1 includes an adsorption plate on which an adsorbent is supported and a flow pipe for heating the adsorption plate. Carbon dioxide in the air is adsorbed by the adsorbent. The heating medium flowing through the flow pipe heats and regenerates the adsorbent on the adsorption plate. The carbon dioxide desorbed from the adsorbent is conveyed by a pump and stored.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The temperature required for regenerating the adsorbent that adsorbs carbon dioxide is, for example, about 80 to 100°C. Therefore, when the temperature for heating the adsorbent is low, there is a problem that the adsorbent cannot be sufficiently regenerated.

[0005] The present disclosure is to reduce the temperature required for regenerating the adsorbent targeting carbon dioxide.

Means for Solving the Problems

[0006] A first aspect targets an adsorption member (50). The adsorption member (50) includes a base material (B) having a plurality of holes (56) through which air flows, and an adsorbent (60) supported on the base material (B) that adsorbs carbon dioxide in the air. The adsorbent (60) includes an amine - based substance and an ionic liquid.

[0007] In the first aspect, by including an ionic liquid in the adsorbent (60), the temperature required for regenerating the adsorbent (60) can be lowered.

[0008] In the second aspect, in the first aspect, the weight ratio of the ionic liquid to the amine-based substance is 1 / 3 or less.

[0009] If the weight ratio of the ionic liquid is too large, the temperature required for regenerating the adsorbent (60) becomes too low and approaches the temperature of normal outdoor air. As a result, the adsorption performance of the adsorbent (60) may decrease, or carbon dioxide may desorb from the adsorbent (60) at an unintended timing. On the other hand, in the second aspect, since the weight ratio of the ionic liquid to the amine-based substance is 1 / 3 or less, it is possible to suppress the temperature required for regenerating the adsorption member (50) from approaching the temperature of normal outdoor air, and the above problems can be solved.

[0010] In the third aspect, in the first or second aspect, the weight ratio of the ionic liquid to the amine-based substance is 1 / 6 or more.

[0011] If the weight ratio of the ionic liquid is too small, the temperature required for regenerating the adsorbent (60) cannot be sufficiently lowered. On the other hand, in the third aspect, by setting the weight ratio of the ionic liquid to 1 / 6 or more, the temperature required for regenerating the adsorbent (60) can be made lower than the normal temperature (for example, 80 to 100 °C).

[0012] The fourth aspect is a carbon dioxide recovery system including the adsorption member (50) according to any one of the first to third aspects.

[0013] In the fifth aspect, in the fourth aspect, the adsorption member (50) is provided with a heating device (10) that heats the adsorption member (50) in the range of 50 °C or higher and 70 °C or lower.

[0014] In the fifth aspect, the temperature when heating the adsorption member (50) by the heating device (10) is in the range of 50°C or higher and 70°C or lower, which is lower than the normal temperature. On the other hand, the temperature required for the regeneration of the adsorption member (50) is lowered due to the presence of the ionic liquid. Therefore, even if the temperature range when heating the adsorption member (50) by the heating device (10) is relatively small, the adsorbent (60) can be regenerated.

[0015] The sixth aspect is, in the fifth aspect, the heating device (10) includes a compressor (13), a radiator (41), a decompression mechanism (14), and an evaporator (15), and is a refrigeration cycle device that heats the adsorption member (50) with the heat released from the radiator (41).

[0016] In the sixth aspect, the refrigeration cycle device (10) heats the adsorption member (50) in the range of 50°C or higher and 70°C or lower. When the refrigeration cycle device (10) is the heat source of the adsorbent (60), if the temperature required for the regeneration of the adsorbent (60) is the normal temperature (for example, 80°C to 100°C), the COP (coefficient of performance) of the refrigeration cycle device (10) is likely to decrease. On the other hand, the temperature required for the regeneration of the adsorption member (50) is lowered due to the presence of the ionic liquid. Therefore, the adsorbent (60) can be regenerated while suppressing the decrease in the COP of the refrigeration cycle device (10).

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

[0018] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of the present disclosure. Since each drawing is for conceptually explaining the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for easy understanding.

[0019] (1) Overall configuration An embodiment of the present disclosure is a carbon dioxide recovery system (1). The carbon dioxide recovery system (1) in this example recovers carbon dioxide in the atmosphere, that is, outdoor air. The carbon dioxide recovery system (1) in this example constitutes a DAC (Direct Air Capture) system that directly separates and recovers carbon dioxide from the atmosphere.

[0020] As shown in FIG. 1, the carbon dioxide recovery system (1) includes a refrigeration cycle device (10), an adsorption device (30) having an adsorption member (50), a recovery unit (20), and a controller (C). The refrigeration cycle device (10) is a heating device that heats the adsorption member (50). The recovery unit (20) is a device for recovering carbon dioxide desorbed from the adsorption member (50). The controller (C) controls each device of the carbon dioxide recovery system (1).

[0021] (2) Refrigeration cycle device The refrigeration cycle device (10) includes a refrigerant circuit (11) that performs a refrigeration cycle and a first fan (12). The refrigerant circuit (11) is filled with a refrigerant. The refrigerant circuit (11) has a compressor (13), a first heat exchanger (41), an expansion valve (14), and a second heat exchanger (15). The compressor (13) compresses and discharges the refrigerant. The compressor (13) is configured to have a variable rotational speed. The first heat exchanger (41) constitutes a radiator (condenser). The first heat exchanger (41) is provided in the adsorption device (30). The first heat exchanger (41) exchanges heat between the refrigerant and the adsorption member (50) to heat the adsorption member (50). The expansion valve (14) constitutes a pressure reducing mechanism that reduces the pressure of the refrigerant. For example, the expansion valve (14) is configured as an electronic expansion valve with a variable opening degree. The second heat exchanger (15) is an air heat exchanger disposed outdoors. The first fan (12) is disposed near the second heat exchanger (15). The second heat exchanger (15) exchanges heat between the refrigerant and the outdoor air blown by the first fan (12).

[0022] (3) Adsorption device The suction device (30) includes a casing (31), an inflow duct (32), and an outflow duct (33).

[0023] The casing (31) is hollow and forms an air flow path (AP) through which air flows inside. The casing (31) has a first plate (31a) and a second plate (31b). The first plate (31a) and the second plate (31b) face each other. In this example, the first plate (31a) is located on the lower side of the casing (31), and the second plate (31b) is located on the upper side of the casing (31).

[0024] The casing (31) is formed with an inlet (34) for allowing outdoor air to flow into the air flow path (AP) and an outlet (35) for allowing the air in the air flow path (AP) to flow out. The inlet (34) is formed in the first plate (31a). The outlet (35) is formed in the second plate (31b). The air flow path (AP) is formed from the inlet (34) to the outlet (35).

[0025] The inflow duct (32) is connected to the inlet (34). The inflow duct (32) communicates the outdoor space with the inlet (34). A first damper (36) is provided inside the inflow duct (32). The first damper (36) switches between an open state (the state shown by the solid line in FIG. 1) in which the inlet (34), which is the inflow portion of the air flow path (AP), is opened and a closed state (the state shown by the broken line in FIG. 1) in which the inlet (34) is closed.

[0026] The outflow duct (33) is connected to the outlet (35). The outflow duct (33) communicates the outlet (35) with the outdoor space. A second damper (37) is provided inside the outflow duct (33). The second damper (37) switches between an open state (the state shown by the solid line in FIG. 1) in which the outlet (35), which is the outflow portion of the air flow path (AP), is opened and a closed state (the state shown by the broken line in FIG. 1) in which the outlet (35) is closed.

[0027] The suction device (30) has a suction unit (40) and a second fan (38). The suction unit (40) and the second fan (38) are arranged in the air flow path (AP). In this example, the second fan (38) is arranged on the downstream side of the air flow relative to the suction unit (40). The second fan (38) conveys the air in the air flow path (AP).

[0028] The suction unit (40) has a first heat exchanger (41) and a suction member (50). The suction unit (40) is configured by attaching the suction member (50) to the first heat exchanger (41). As schematically shown in FIG. 2, the suction member (50) has a base material (B) and a suction agent (B) carried on the base material (B). A plurality of holes (56) through which air flows are formed in the base material (B). The suction agent (60) is carried on the inner surfaces of the plurality of holes (56). The suction agent (60) may be carried on the outer surface of the base material (B).

[0029] The suction agent (60) has the property of adsorbing carbon dioxide. Strictly speaking, the suction agent (60) has the property that the higher its temperature, the easier it is for carbon dioxide to desorb, and the lower its temperature, the easier it is for carbon dioxide to be adsorbed. Here, "adsorption" includes not only the adsorption of carbon dioxide on the surface of a solid or liquid, but also the absorption of carbon dioxide into the interior of a solid or liquid. Also, "adsorption" includes not only physical adsorption but also chemical adsorption. The suction agent (60) is composed of a liquid film.

[0030] (4) Recovery unit As shown in FIG. 1, the recovery unit (20) has a recovery flow path (21), a tank (22), a pump (23), and an on-off valve (24). The inflow end of the recovery flow path (21) is connected to the casing (31). The inflow end of the recovery flow path (21) communicates with the air flow path (AP). The outflow end of the recovery flow path (21) is connected to the tank (22). The tank (22) stores the recovered carbon dioxide. The pump (23) reduces the pressure inside the casing (31) and transports the carbon dioxide detached from the adsorption member (50). The on-off valve (24) is provided in the recovery flow path (21) and opens and closes the recovery flow path (21). The recovery unit (20) may have a damper that opens and closes the recovery flow path (21) instead of the on-off valve (24).

[0031] (5) Controller As shown in FIG. 1, the controller (C) controls the refrigeration cycle device (10), the adsorption device (30), and the recovery unit (20). Specifically, the controller (C) controls the opening and closing states of the first damper (36) and the second damper (37), the ON / OFF states of the first fan (12) and the second fan (38), the ON / OFF state of the compressor (13), the rotational speed of the compressor (13), the opening degree of the expansion valve (14), the ON / OFF state of the pump (23), and the opening and closing state of the on-off valve (24). The controller (C) may control the rotational speed of the first fan (12), the second fan (38), or the pump (23).

[0032] The controller (C) includes a microcomputer and a memory device that stores software for operating the microcomputer.

[0033] (6) Operation of the carbon dioxide system The carbon dioxide recovery system (1) performs an adsorption operation as the first operation and a regeneration operation as the second operation. The carbon dioxide recovery system (1) alternately repeats the adsorption operation and the regeneration operation at predetermined time intervals.

[0034] (6-1) Adsorption operation During the suction operation, the first damper (36) and the second damper (37) are in the open state (the state shown by the solid line in FIG. 1), and the on-off valve (24) is in the closed state. The compressor (13), the first fan (12), and the pump (23) are in the stopped state, and the second fan (38) is in the operating state. The refrigeration cycle device (10) does not perform the refrigeration cycle.

[0035] When the second fan (38) is operated, the outdoor air sequentially passes through the inflow duct (32) and the inlet (34), and flows through the air flow path (AP) in the casing (31). The air in the air flow path (AP) flows through each through-hole (56) of the adsorption member (50). At this time, carbon dioxide in the air is adsorbed by the adsorbent (60). The air that flows out of each through-hole (56) and passes through the adsorption unit (40) sequentially passes through the outlet (35) and the outflow duct (33), and is discharged outdoors.

[0036] (6-2) Regeneration operation During the regeneration operation, the first damper (36) and the second damper (37) are in the closed state (the state shown by the broken line in FIG. 1), and the on-off valve (24) is in the open state. The compressor (13), the first fan (12), and the pump (23) are in the operating state, and the second fan (38) is in the stopped state. The refrigeration cycle device (10) performs a refrigeration cycle in which the first heat exchanger (41) functions as a radiator (condenser) and the second heat exchanger (15) functions as an evaporator.

[0037] In the refrigerant circuit (11), the compressor (13) compresses the refrigerant and discharges the compressed refrigerant. The refrigerant discharged from the compressor (13) flows through the first heat exchanger (41). Specifically, in the first heat exchanger (41), the refrigerant in the first header manifold (42) is branched into each flat tube (44). The heat of the refrigerant in each flat tube (44) is transferred to the adsorption part (51). As a result, the carbon dioxide adsorbed by the adsorbent (60) desorbs. The refrigerant that has flowed through each flat tube (44) and condensed merges in the second header manifold (43), and then is decompressed by the expansion valve (14). The decompressed refrigerant evaporates by absorbing heat from the outdoor air in the second heat exchanger (15). The evaporated refrigerant is compressed again by the compressor (13).

[0038] When the pump (23) is operated, the air flow path (AP) in the casing (31) is depressurized. When carbon dioxide desorbs from the adsorption member (50), the concentration of carbon dioxide in the air in the air flow path (AP) increases. In this way, the concentrated carbon dioxide flows through the recovery flow path (21) and is recovered into the tank (22).

[0039] In the regeneration operation, the refrigeration cycle device (10) is configured to heat the adsorption member (50) in the range of 50°C or higher and 70°C or lower. Specifically, in the regeneration operation, the controller (C) controls the rotational speed of the compressor (13) to adjust the temperature of the refrigerant in the first heat exchanger (41). At this time, the controller (C) may control the opening degree of the expansion valve (14).

[0040] (7) Adsorbent material The adsorbent (60) of the present embodiment is composed of a material comprising two components of an amine-based substance that adsorbs carbon dioxide and an ionic liquid, or three or more components including an amine-based substance and an ionic liquid. The amine-based substance is strictly an amine-based liquid. The amine-based liquid is polyethyleneimine.

[0041] The amine-based liquid may be 3-aminopropyltriethoxysilane, 3-[2-(2-aminoethylamino)ethylamino]propyltrimethoxysilane, 3-(2-aminoethylamino)propyldimethoxymethylsilane, 3-(aminomethyl)benzylamine, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-hydroxymethyl-1,3-propanediol, 2-hydroxyethyldimethylamine, 1-amino-2-propanol, 1-amino-2-butanol, tetraethylene pentamine, benzylamine, phenethylamine, paramethoxybenzylamine, metaxylenediamine, o-xylenediamine, monoethanolamine, diethylene glycolamine, dimethylaminoethanol, etc.

[0042] Ionic liquids include 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium nitrate, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium thiocyanate, 1-butyl-3-methylimidazolium methyl sulfate, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, 1-butyl-3-methylimidazolium acetate, 1-ethyl-1-3-methyl-1-imidazolium ethyl sulfate, 1-n-octyl-3-methylimidazolium hexafluorophosphate, 1-n-octyl-1-3-methylimidazolium tetrafluoroborate, 1-n-butyl-3-methylimidazolium nitrate, N-butylpyridinium tetrafluoroborate, 1-butyl-3-methylimidazolium, etc.

[0043] When the adsorbent is composed only of an amine-based liquid, the temperature required for the regeneration of the adsorbent (60) is about 80°C to 100°C. In this case, it is necessary to heat the temperature of the adsorption member (50) in the range of 80°C to 100°C. In the refrigeration cycle device (10), when the temperature of the refrigerant in the first heat exchanger (41) is set to be equal to or higher than this temperature range, the COP (coefficient of performance) of the refrigeration cycle device (10) will decrease.

[0044] In contrast, the adsorbent (60) of the present embodiment contains an ionic liquid in addition to the amine-based liquid. Therefore, in the regeneration operation, the temperature required for the regeneration of the adsorbent (60) can be reduced. Due to the presence of the ionic liquid, the C-N bond strength of the carbamate / carbamic acid species decreases, and as a result, the carbon dioxide adsorbed on the adsorbent (60) is likely to desorb. Therefore, the temperature required for the regeneration of the adsorbent (60) can be reduced.

[0045] Let the weight of the amine-based liquid in the adsorbent (60) be w1 and the weight of the ionic liquid be w2. In this case, the weight ratio of the ionic liquid to the amine-based liquid (w2 / w1) is preferably 1 / 3 or less. If the weight ratio of the ionic liquid becomes too large, the temperature required for regenerating the adsorbent (60) becomes excessively low. Specifically, the temperature required for regenerating the adsorbent (60) becomes less than 50°C. In this case, under conditions where the temperature of outdoor air is high in summer or the like, the adsorbent (60) may be regenerated naturally. Also, the adsorption capacity of the adsorbent (60) may decrease, and it may become impossible to sufficiently recover carbon dioxide in the air.

[0046] On the other hand, for the adsorbent (60) of this embodiment, the weight ratio of the ionic liquid to the amine-based liquid (w2 / w1) is 1 / 3 or less. Therefore, it is possible to suppress the temperature required for regenerating the adsorbent (60) from becoming less than 50°C. As a result, it is possible to suppress the adsorbent (60) from being naturally regenerated by outdoor air or the adsorption capacity of the adsorbent (60) from decreasing.

[0047] The weight ratio of the ionic liquid to the amine-based liquid (w2 / w1) is preferably 1 / 6 or more. If the weight ratio of the ionic liquid becomes too small, the temperature required for regenerating the adsorbent (60) cannot be sufficiently reduced. For this reason, the energy required for heating the adsorbent (60) increases. In particular, for the refrigeration cycle device (10), the COP decreases.

[0048] On the other hand, for the adsorbent (60) of this embodiment, the weight ratio of the ionic liquid to the amine-based liquid (w2 / w1) is 1 / 6 or more. Therefore, the temperature required for regenerating the adsorbent (60) can be lowered to about 70°C or less. As a result, the energy required for regenerating the adsorbent (60) can be reduced, and furthermore, the COP of the refrigeration cycle device (10) can be improved.

[0049] (8) Features (8-1) The adsorbing member (50) includes a base material (B) having a plurality of holes (56) through which air flows, and an adsorbent (60) carried on the base material (B) that adsorbs carbon dioxide in the air. The adsorbent (60) includes an amine-based liquid and an ionic liquid.

[0050] In this configuration, due to the presence of the ionic liquid, the temperature required for regeneration of the adsorbent (60) can be reduced. As a result, the energy required for regeneration of the adsorbent (60) can be reduced.

[0051] When the regeneration temperature of the adsorbent (60) increases, the amine-based liquid is likely to volatilize, and the life of the adsorbent (60) becomes shorter. On the other hand, when the regeneration temperature of the adsorbent (60) decreases due to the presence of the ionic liquid, the amine-based liquid is less likely to volatilize. As a result, the life of the adsorbent (60) becomes longer, so the replacement frequency of the adsorbent (60) can be reduced.

[0052] (8-2) The adsorbent (60) is configured such that the weight ratio of the ionic liquid to the amine-based substance is 1 / 3 or less. For this reason, it is possible to suppress the temperature required for regeneration of the adsorbent (60) from becoming excessively low, so it is possible to suppress carbon dioxide from naturally regenerating from the adsorbent (60) or the adsorption performance of the adsorbent (60) from deteriorating.

[0053] (8-3) The adsorbent (60) is configured such that the weight ratio of the ionic liquid to the amine-based substance is 1 / 6 or more. For this reason, the temperature required for regeneration of the adsorbent (60) can be sufficiently reduced, and the energy required for regeneration can be reduced.

[0054] (8-4) The carbon dioxide recovery system (1) includes a heating device that heats the adsorbing member (50) in the range of 50°C or higher and 70°C or lower. The heating device includes a compressor (13), a first heat exchanger (41) that is a radiator, an expansion valve (14) that is a decompression mechanism, and a second heat exchanger (15) that is an evaporator, and is a refrigeration cycle device (10) that heats the adsorbing member (50) with the heat released from the first heat exchanger.

[0055] The presence of the ionic liquid can set the temperature required for the regeneration of the adsorbent (60) within the range of 50°C or higher and 70°C or lower. On the other hand, since the refrigeration cycle device (10) is configured to heat the adsorption member (50) within the range of 50°C or higher and 70°C or lower, carbon dioxide can be sufficiently desorbed from the adsorbent (60). By lowering the regeneration temperature of the adsorbent (60), the COP of the refrigeration cycle device (10) can be improved.

[0056] (8-5) The adsorption member (50) has a base material (B) having a plurality of holes (56) through which air flows, and an adsorbent (60) supported on the base material (B). Therefore, in the adsorption member (50), the surface area on which the adsorbent (60) is supported can be increased, so that the adsorption capacity of the adsorption unit (40) can be increased.

[0057] Here, if the regeneration temperature of the adsorbent (60) is lowered due to the presence of the ionic liquid, the adsorption capacity of the adsorbent (60) may decrease, and there is a possibility that sufficient carbon dioxide cannot be adsorbed by the adsorbent (60). On the other hand, by supporting the adsorbent (60) on the base material (B) having a plurality of holes (56), such a decrease in adsorption capacity can be suppressed.

[0058] (9) Other Embodiments The above embodiment may have the following configuration.

[0059] The carbon dioxide recovery system (1) does not have to be a DAC system that directly recovers carbon dioxide in the atmosphere. For example, the carbon dioxide recovery system (1) may recover carbon dioxide in the air in which air and industrial exhaust gas are mixed.

[0060] The heating device may be an electric heater or a heat source using exhaust heat. The heating device may be a hot water supply device that supplies high-temperature water as a heat medium to the heat transfer pipe (flat pipe (44)) of the adsorption unit (40). In other words, the carbon dioxide recovery system (1) does not have to use the heat source by the refrigeration cycle device (10).

[0061] The decompression mechanism may be a capillary tube or a thermostatic expansion valve.

[0062] The adsorption member (50) may adsorb carbon dioxide in indoor air instead of outdoor air. The adsorption member (50) may be applied to, for example, a ventilation device that ventilates the interior of a room.

[0063] The adsorbent (60) may be supported over the entire substrate (B).

[0064] The material of the substrate (B) of the adsorption member (50) may be metal. The substrate (B) may be composed of a porous material. In this case, the pores inside the porous material form the pores through which air flows. The substrate (B) may be composed of metal fibers or carbon fibers. In this case, the pores inside the metal fibers or carbon fibers form the pores through which air flows.

[0065] Although the embodiments and modifications have been described above, it will be understood that various changes in form and detail are possible without departing from the spirit and scope of the claims. Also, the above embodiments, modifications, and other embodiments may be combined or substituted as appropriate as long as the functions of the objects of the present disclosure are not impaired.

[0066] The above descriptions such as "first," "second," "third,"... are used to distinguish the clauses to which these descriptions are attached, and do not limit even the number and order of those clauses.

Industrial Applicability

[0067] As described above, the present disclosure is useful for an adsorption member and a carbon dioxide recovery system.

Explanation of Reference Numerals

[0068] 1 Carbon dioxide recovery system 10 Refrigeration cycle device (heating device) 13 Compressor 14 Expansion valve (decompression mechanism) 15 Second heat exchanger (evaporator) 41 First heat exchanger (radiator) 50 Adsorbing member 56 Through-hole (hole) 60 Adsorbent B Substrate

Claims

1. a substrate (B) having a plurality of holes (56) through which air flows; an adsorbent (60) carried on the substrate (B) for adsorbing carbon dioxide in the air, wherein the adsorbent (60) contains an amine-based substance and an ionic liquid adsorption member.

2. The adsorption member according to claim 1, wherein the weight ratio of the ionic liquid to the amine-based substance is 1 / 3 or less. The adsorption member according to claim 1.

3. The adsorption member according to claim 2, wherein the weight ratio of the ionic liquid to the amine-based substance is 1 / 6 or more. The adsorption member according to claim 2.

4. A carbon dioxide recovery system comprising the adsorption member according to any one of claims 1 to 3. carbon dioxide recovery system.

5. The carbon dioxide recovery system according to claim 4, further comprising a heating device (10) for heating the adsorption member (50) in a range of 50°C or higher and 70°C or lower. The carbon dioxide recovery system according to claim 4.

6. The heating device (10) has a compressor (13), a radiator (41), a decompression mechanism (14), and an evaporator (15), and is a refrigeration cycle device for heating the adsorption member (50) with the heat released from the radiator (41). The carbon dioxide recovery system according to claim 5.

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