Adsorption device and adsorption material

Abstract

To provide an adsorption device and adsorbent suitable for achieving both improved adsorption efficiency and improved desorption efficiency. [Solution] The adsorption device 100 comprises an adsorbent 10 having an expandable / contractible structure and a housing section 20 that houses the adsorbent 10 in a contracted state. In the adsorption device 100, for example, the adsorbent 10 in an extended state is exposed to the external atmosphere of the housing section 20, and the adsorbent 10 in a contracted state is sealed in the housing section 20. In the adsorption device 100, for example, an adsorption mode is performed in which the adsorbent 10 exposed to the external atmosphere of the housing section 20 adsorbs acidic gas contained in the raw material gas, and a desorption mode is performed in which the acidic gas is desorbed from the adsorbent 10 that has adsorbed the acidic gas and is sealed in the housing section 20.

Description

[Technical Field]

[0001] This invention relates to an adsorption device and an adsorption material. [Background technology]

[0002] In recent years, technologies for directly separating and recovering carbon dioxide contained in the atmosphere and exhaust gases (Direct Air Capture: DAC) have attracted attention. For example, Patent Document 1 describes a method for separating gaseous carbon dioxide from a gas mixture such as the atmosphere, which contains gaseous carbon dioxide and gases other than carbon dioxide, by adsorption and desorption using an adsorbent. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Special Publication No. 2017-528318 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] The present invention aims to provide an adsorption device and adsorbent suitable for achieving both improved adsorption efficiency and improved desorption efficiency. [Means for solving the problem]

[0005] The present invention Adhesive material having an expandable structure, A housing section for housing the adsorbent in a contracted state, Adsorption device equipped, To provide.

[0006] Furthermore, the present invention, Adhesive material having an expandable structure, To provide. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an adsorption device and an adsorbent suitable for achieving both an improvement in adsorption efficiency and an improvement in desorption efficiency.

Brief Description of the Drawings

[0008] [Figure 1] It is a perspective view schematically showing an example of the adsorption device of the present invention, where (A) shows the state in the adsorption mode and (B) shows the state in the desorption mode. [Figure 2] It is a cross-sectional view schematically showing an example of the adsorbent, where (A) shows the extended state, (B) shows the state of transitioning from the extended state to the contracted state, and (C) shows the contracted state. [Figure 3] It is a perspective view schematically showing an example of the adsorbent. [Figure 4] It is a cross-sectional view schematically showing a part of the adsorbent. [Figure 5] It is a cross-sectional view schematically showing Modification Example 1 of the adsorbent, where (A) shows the extended state and (B) shows the contracted state. [Figure 6] It is a cross-sectional view schematically showing Modification Example 2 of the adsorbent, where (A) shows the extended state, (B) shows the state of transitioning from the extended state to the contracted state, and (C) shows the contracted state. [Figure 7] It is a cross-sectional view schematically showing Modification Example 3 of the adsorbent, where (A) shows the extended state, (B) shows the state of transitioning from the extended state to the contracted state, and (C) shows the contracted state. [Figure 8] It is a cross-sectional view schematically showing Modification Example 4 of the adsorbent, where (A) shows the extended state and (B) shows the contracted state. [Figure 9] It is a cross-sectional view schematically showing Modification Example 5 of the adsorbent, where (A) shows the extended state and (B) shows the contracted state. [Figure 10] It is a cross-sectional view schematically showing Modification Example 6 of the adsorbent, where (A) shows the extended state and (B) shows the contracted state. [Figure 11] It is a cross-sectional view schematically showing Modification Example 7 of the adsorbent. [Figure 12]A perspective view schematically showing another example of the adsorption device of the present invention, where (A) shows the state of the first adsorption and desorption mode, and (B) shows the state of the second adsorption and desorption mode.

Embodiments for Carrying Out the Invention

[0009] The adsorption device according to the first aspect of the present invention includes an adsorbent having a telescopic structure, a housing portion for housing the adsorbent in a contracted state, and is provided with.

[0010] In the second aspect of the present invention, for example, in the adsorption device according to the first aspect, the adsorbent in the extended state is exposed to the external atmosphere of the housing portion, and the adsorbent in the contracted state is sealed in the housing portion.

[0011] In the third aspect of the present invention, for example, in the adsorption device according to the second aspect, an adsorption mode in which an acidic gas contained in the raw material gas is adsorbed to the adsorbent exposed to the external atmosphere of the housing portion, and a desorption mode in which the acidic gas is desorbed from the adsorbent that has adsorbed the acidic gas and is sealed in the housing portion are implemented.

[0012] In the fourth aspect of the present invention, for example, in the adsorption device according to any one of the first to third aspects, the housing portion has a housing having an opening and a lid body for opening and closing the opening, and the adsorbent is connected to each of the housing and the lid body.

[0013] In the fifth aspect of the present invention, for example, in the adsorption device according to any one of the first to fourth aspects, the adsorbent has a first part, a second part, and a connecting part connecting the first part and the second part, and has a structure in which the angle formed by the first part and the second part at the connecting part changes as it expands and contracts.

[0014] In the sixth aspect of the present invention, for example, in the adsorption device according to the fifth aspect, the adsorbent includes a plurality of unit structures having the above structure.

[0015] In a seventh aspect of the present invention, for example, in an adsorption device according to any one of the first to sixth aspects, the adsorbent includes a polymer having an amino group.

[0016] In the eighth aspect of the present invention, for example, in the adsorption device according to the seventh aspect, the polymer includes an amine polymer having constituent units derived from epoxy monomers.

[0017] In a ninth aspect of the present invention, for example, in an adsorption device according to any one of the first to eighth aspects, the adsorbent includes a first adsorbent and a second adsorbent, and the housing includes a first housing for housing the first adsorbent in a contracted state and a second housing for housing the second adsorbent in a contracted state, wherein the first adsorbent in an extended state is exposed to the external atmosphere of the first housing, and the second adsorbent in a contracted state is sealed in the second housing, and the second adsorbent in an extended state is exposed to the external atmosphere of the second housing, and the first adsorbent in a contracted state is sealed in the first housing.

[0018] In a tenth aspect of the present invention, for example, in the adsorption apparatus according to the ninth aspect, a first adsorption and desorption mode is performed in which the acidic gas contained in the raw material gas is adsorbed onto the first adsorbent exposed to the external atmosphere of the first containment, and the acidic gas is desorbed from the second adsorbent sealed in the second containment that is adsorbing the acidic gas; and a second adsorption and desorption mode is performed in which the acidic gas contained in the raw material gas is adsorbed onto the second adsorbent exposed to the external atmosphere of the second containment, and the acidic gas is desorbed from the first adsorbent sealed in the first containment that is adsorbing the acidic gas.

[0019] The adsorbent material according to the 11th aspect of the present invention has an expandable structure.

[0020] The details of the present invention will be described below, but the following description is not intended to limit the present invention to any particular embodiment.

[0021] [Adsorption device] Figure 1 is a schematic perspective view showing an example of the adsorption device of this embodiment, where (A) shows the adsorption mode state and (B) shows the desorption mode state.

[0022] The adsorption device 100 shown in Figure 1 comprises an adsorption material 10 having an expandable / contractible structure and a housing section 20. The housing section 20 houses the adsorption material 10 in its contracted state.

[0023] In this specification, "expandable / contractible" means that the volume V1 of the space surrounding the adsorbent 10 in the extended state is greater than the volume V2 of the space surrounding the adsorbent 10 in the contracted state. "Space surrounding the adsorbent" means the space defined by the smallest sphere that encloses the outer edge of the adsorbent 10. The ratio of volume V2 to volume V1 (V2 / V1) is, for example, in the range of 1 / 2 to 1 / 10. In this specification, "expandable / contractible structure" can be a structure in which the adsorbent 10 expands or contracts due to the structure of the adsorbent 10 itself. An example of an "expandable / contractible structure" is a bellows structure.

[0024] In adsorption devices equipped with adsorbents for recovering acidic gases such as carbon dioxide contained in raw material gases, it is desirable to design the adsorbent to have a structure that allows the raw material gas to pass through easily in order to maximize the amount of raw material gas that comes into contact with the adsorbent during adsorption operation. When the adsorbent is designed to allow the raw material gas to pass through easily, the volume of the space surrounding the adsorbent inevitably becomes large. On the other hand, since desorption operation involves reduced pressure and heating, it is desirable for the volume of the adsorbent to be small in order to reduce the energy required to desorb the acidic gas from the adsorbent. In other words, prioritizing adsorption efficiency tends to increase the volume of the space surrounding the adsorbent, and prioritizing desorption efficiency tends to decrease the volume of the space surrounding the adsorbent. Thus, improving adsorption efficiency and improving desorption efficiency are contradictory. Since the adsorbents used in adsorption devices usually have a rigid structure such as a honeycomb structure, it has been difficult to achieve both improved adsorption efficiency and improved desorption efficiency with conventional thinking.

[0025] However, according to the adsorption device 100 of this embodiment, since the adsorbent 10 has an expandable and contractible structure, for example, in the adsorption mode, when adsorbing acidic gases contained in the raw material gas, the volume of the adsorbent 10 can be increased by extending the adsorbent 10, as shown in Figure 1(A). On the other hand, in the desorption mode, when desorbing acidic gases from the adsorbent 10 that has adsorbed them, the volume of the adsorbent 10 can be decreased by contracting the adsorbent 10, as shown in Figure 1(B). As a result, in the adsorption mode, the amount of raw material gas in contact with the adsorbent 10 can be increased, and in the desorption mode, the energy required for desorbing the adsorbed gas can be reduced. Thus, the adsorption device 100 is suitable for achieving both improved adsorption efficiency and improved desorption efficiency.

[0026] As shown in Figure 1, the adsorbent 10 may have an expandable / contractable structure that extends in a first direction or contracts in a second direction opposite to the first direction. In the example in Figure 1, the Z direction is the expansion / contraction direction of the adsorbent 10. The +Z direction is the first direction, and the -Z direction is the second direction. The X and Y directions are perpendicular to the expansion / contraction direction of the adsorbent 10, respectively.

[0027] As can be seen from Figure 1, the volume V1 of the space surrounding the adsorbent 10 in the extended state is larger than the volume V2 of the space surrounding the adsorbent 10 in the contracted state. With this configuration, in the adsorption mode, the amount of raw material gas in contact with the first adsorption direction 10 can be increased by extending the adsorbent 10 in the first direction, and in the desorption mode, the energy required for desorption of the adsorbed gas can be reduced by contracting the adsorbent 10 in the second direction.

[0028] The adsorption device 100 is used, for example, to directly separate and recover acidic gases from a raw material gas. The raw material gas preferably contains, for example, an acidic gas and further contains other gases other than acidic gases. The raw material gas is preferably the atmosphere, but may also be combustion gas or the like.

[0029] The acidic gas content in the raw material gas is not particularly limited, and is, for example, 0.01 vol% (100 vol ppm) or more, preferably 0.04 vol% (400 vol ppm) or more, and may also be 0.1 vol% or more. The upper limit of the acidic gas content in the raw material gas is not particularly limited, and is, for example, 20 vol%. The pressure of the raw material gas is typically equal to the atmospheric pressure in the operating environment of the adsorption device 100. The temperature of the raw material gas is, for example, room temperature (25°C).

[0030] In this embodiment, as shown in Figure 1(A), the extended adsorbent 10 is exposed to the external atmosphere of the containment section 20. As shown in Figure 1(B), the contracted adsorbent 10 is sealed in the containment section 20. With this configuration, in adsorption mode, the raw material gas can be brought into direct contact with the adsorbent 10 from the outside, and in desorption mode, the desorption of the adsorbed gas from the adsorbent 10 can be promoted by reducing the pressure or heating the inside of the containment section 20.

[0031] In desorption mode, the desorption of adsorbed gas from the adsorbent 10 can be promoted by reducing the pressure inside the containment section 20 using a depressurizing device (not shown). When performing the desorption mode, the pressure inside the containment section 20 may be reduced to 0.1 kPa. In this specification, unless otherwise specified, "pressure" means absolute pressure. The configuration of the depressurizing device is not particularly limited as long as it is capable of reducing the pressure inside the containment section 20. The depressurizing device is typically a vacuum pump. The adsorption device 100 may be equipped with a depressurizing device such as a vacuum pump.

[0032] In the desorption mode, heating the adsorbent 10 in the containment section 20 with a heating device can further promote the desorption of adsorbed gas from the adsorbent 10. When the desorption mode is implemented, the temperature inside the containment section 20 may be raised to 120°C. The heating device is not particularly limited in its configuration as long as it is capable of heating the adsorbent 10 inside the containment section 20. The heating device is typically a heater. The adsorption device 100 may be equipped with a heating device such as a heater. In the example shown in Figure 1, a heater 30 is provided inside the containment section 20.

[0033] In this embodiment, the housing 20 has a housing 21 and a lid 22. The housing 21 has an opening 21m. The lid 22 opens and closes the opening 21m. As shown in Figure 1, the adsorbent 10 may be connected to the housing 21 and the lid 22, respectively. With this configuration, as shown in Figure 1(A), by moving the lid 22 to open the opening 21m, the adsorbent 10 can be extended and exposed to the external atmosphere of the housing 20. As shown in Figure 1(B), by moving the lid 22 to close the opening 21m, the adsorbent 10 can be contracted and sealed in the housing 20. Therefore, with a simple configuration, the adsorption mode and desorption can be achieved. It can be switched between remote and remote modes.

[0034] In the example shown in Figure 1, the opening 21m and bottom surface 21b of the housing 21 are located in the XY plane perpendicular to the first direction (+Z direction). The end 10a of the suction material 10 in the first direction (+Z direction) is fixed to the inner surface 22b of the lid 22, and the end 10b of the suction material 10 in the second direction (-Z direction) is fixed to the bottom surface 21b of the housing 21.

[0035] In the example shown in Figure 1, heaters 30 are provided on the inner surface 22b of the lid 22 and the bottom surface 21b of the housing 21 within the housing 20. However, the position where the heaters 30 are provided is not limited to the position shown in Figure 1.

[0036] In this embodiment, as shown in Figure 1(A), in the adsorption mode, the acidic gas contained in the raw material gas is adsorbed onto the adsorbent 10 exposed to the external atmosphere of the containment section 20. As shown in Figure 1(B), in the desorption mode, the acidic gas is desorbed from the adsorbent 10 that has adsorbed the acidic gas and is sealed in the containment section 20. Thus, the adsorption device 100 performs both the adsorption mode and the desorption mode.

[0037] The suction device 100 may further include a switching mechanism (not shown) for switching between suction mode and detachment mode. The switching mechanism may include, for example, a lift (not shown) and a controller (not shown) for moving the lid 22 in a first direction (+Z direction) or a second direction (-Z direction). For example, the suction mode and detachment mode can be switched by controlling the lift with the controller and moving the lid 22.

[0038] The controller is a DSP (Digital Signal Processor) that includes, for example, an A / D conversion circuit, input / output circuits, arithmetic circuits, and memory devices. The controller stores a program for properly operating the adsorption device 100. As an example, the controller switches between adsorption mode and desorption mode by controlling the operation of the lid 22. When the desorption mode is in operation, the controller may adjust the pressure inside the containment section 20 by controlling the operation of the depressurization device. When the desorption mode is in operation, the controller may adjust the temperature of the adsorbent material 10 inside the containment section 20 by controlling the operation of the heating device.

[0039] (Adsorbent material) Figure 2 is a schematic cross-sectional view showing an example of the adsorbent material 10 provided in the adsorption device 100. Figure 2(A) shows the adsorbent material 10 in the extended state, (B) shows the state transitioning from the extended state to the contracted state, and (C) shows the contracted state. Figure 3 is a schematic perspective view showing an example of the adsorbent material 10.

[0040] As shown in Figures 1 to 3, the adsorbent material 10 may have a bellows structure in which multiple mountain folds and valley folds are alternately repeated as an expandable and contractible structure. With such a configuration, it is easier to achieve that the volume V1 of the space surrounding the adsorbent material 10 in the expanded state is larger than the volume V2 of the space surrounding the adsorbent material 10 in the contracted state.

[0041] In the examples shown in Figures 1 to 3, the adsorbent material 10 has a bellows structure in which multiple mountain folds and valley folds are alternately repeated so that it can be expanded and contracted in the Z direction.

[0042] More specifically, as shown in Figure 3, the adsorbent material 10 has a first part 51, a second part 52, and a connecting part 61 that connects the first part 51 and the second part 52. Each of the first part 51 and the second part 52 is in the form of a sheet. In the adsorbent material 10, the angle θ that the first part 51 and the second part 52 make at the connecting part 61 changes as the material expands and contracts. Note that in the adsorbent materials shown in Figures 1 to 3, the shapes of the first part 51 and the second part 52 themselves do not change as they expand and contract.

[0043] The adsorbent 10 may have a structure comprising a first part 51, a first connecting part 61, a second part 52, a second connecting part 62, a third part 53, ... a (n-1) connecting part, and an n part. n is an integer of 2 or more. It is preferable that the adsorbent 10 comprises a plurality of unit structures 50 having the above structure.

[0044] As shown in Figures 1 and 2, it is preferable that the adsorbent 10 consists of multiple unit structures 50 arranged at regular intervals in one direction. With this configuration, the raw material gas can pass through the gaps between adjacent unit structures 50, thereby increasing the amount of raw material gas that comes into contact with the adsorbent 10. As a result, the amount of acidic gas recovered can be increased.

[0045] In adsorption mode, the direction in which the raw material gas is supplied is not particularly limited, as long as the raw material gas is in contact with the adsorbent 10. For example, if the adsorbent 10 comprises a plurality of unit structures 50, in adsorption mode, the raw material gas may be supplied from the Y direction so as to pass through the gaps between adjacent unit structures 50, or it may be supplied from the X direction perpendicular to the Y direction.

[0046] In this embodiment, it is preferable that the adsorbent 10 comprises at least one selected from the group consisting of a sheet-like main body portion 11, a fibrous main body portion 13, and a ribbon-like main body portion 14. In the example shown in Figures 1 to 3, the adsorbent 10 comprises a sheet-like main body portion 11. By providing a main body portion with such a shape, it is easy to form the adsorbent 10 having the expandable structure shown in Figures 1 to 3.

[0047] Figure 4 is a schematic cross-sectional view showing a part of the adsorbent 10. As shown in Figure 4, the adsorbent 10 may further include a support 12 that supports the sheet-like main body 11, in addition to the sheet-like main body 11.

[0048] The material of the main body (for example, a sheet-like main body 11) of the adsorbent 10 is not particularly limited, and examples include inorganic materials and organic materials. Examples of inorganic materials include metal oxides such as cerium oxide, zeolites, silica gel, and activated carbon. Examples of organic materials include polymer P having amino groups and amine compounds other than polymer P. In the adsorption device 100 of this embodiment, it is preferable that the adsorbent 10 contains polymer P having amino groups.

[0049] The main body of the adsorbent 10 may have a porous structure. For example, the main body of the adsorbent 10 may be a porous body S containing polymer P.

[0050] The porous body S preferably has a three-dimensional network-like framework containing polymer P. The three-dimensional network-like framework may further contain other components besides polymer P. For example, in the porous body S, the above-mentioned three-dimensional network-like framework extends continuously. The pores contained in the porous body S are preferably continuous pores formed in a three-dimensional manner. The porous body S may have independent pores or through pores penetrating the porous body S.

[0051] The porous body S preferably has an average pore diameter of 0.1 μm or more and 50 μm or less. The larger the average pore diameter of the porous body S, the better the diffusion of acidic gas can be maintained without pore blockage even when the adsorbent 10 contains water. The lower limit of the average pore diameter of the porous body S may be 0.2 μm or more, 0.3 μm or more, or even 0.5 μm or more. In this specification, the average pore diameter of the porous body S refers to the median diameter measured by the mercury intrusion method. The mercury intrusion method is performed using a commercially available pore distribution analyzer (for example, Autopore V9620 manufactured by Micromeristics) under an initial pressure of 21 kPa.

[0052] The porous body S preferably has a specific surface area of 0.5 m , 3 , 3 , 3 , 3 , 3 , ,

[0054] , 3 , 3 , , 3 , 3 , / g or more and 100 m 2 / g or less. The larger the specific surface area of the porous body S, the larger the contact area with the acid gas, so the rate of adsorbing the acid gas increases. The lower limit of the specific surface area of the porous body S is 0.5 m 2 / g or more, 1.0 m 2 / g or more, 2.0 m 2 / g or more, 3.0 m 2 / g or more, 4.0 m 2 / g or more, 5.0 m 2 / g or more, 6.0 m 2 / g or more, 7.0 m 2 / g or more, and even 8.0 m 2 / g or more may be acceptable. The specific surface area of the porous body S means the BET (Brunauer - Emmett - Teller) specific surface area by nitrogen gas adsorption. The specific surface area of the porous body S can be measured by a method conforming to the provisions of JIS Z8830:2013.

[0053] The porous body S preferably has a pore volume of 0.1 cm 3 / g or more and 5.0 cm 3 / g or less. The larger the pore volume of the porous body S, the better the diffusibility of the acid gas in the pores, so the rate of adsorbing the acid gas can increase. The lower limit of the pore volume of the porous body S is 0.2 cm 3 / g or more, 0.3 cm 3 / g or more, 0.5 cm 3 / g or more, 1.0 cm 3 / g or more, and even 2.0 cm 3 / g or more may be acceptable. The upper limit of the pore volume of the porous body S may be 4.0 cm 3 / g or less, or 3.0 cm 3 / g or less may be acceptable. The pore volume of the porous body S can be measured by the mercury intrusion method. The mercury intrusion method is carried out under the condition of an initial pressure of 21 kPa using a commercially available pore distribution analyzer (for example, AutoPore V9620 manufactured by Micromeritics).

[0054] (Polymer P) The polymer P is preferably an amine polymer containing a constituent unit U1 derived from an epoxy monomer. This amine polymer includes, for example, a reaction product P1 from a group of compounds containing an amine monomer and an epoxy monomer.

[0055] The group of compounds for forming reactant P1 includes amine monomers and epoxy monomers, as described above. Reactant P1 may be, for example, a polymer of the group of monomers including amine monomers and epoxy monomers (particularly a polymer of amine monomers and epoxy monomers). Reactant P1 may also be a crosslinked product in which the amine monomer is crosslinked with the epoxy monomer.

[0056] Examples of amine monomers include ethylamine, ethylenediamine, 1,4-butylenediamine, 1,5-pentanediamine, 1,6-hexanediamine, 1,7-heptanediamine, 1,8-octanediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, iminobispropylamine, bis(hexamethylene)triamine, 1,3,6-trisaminomethylhexane, tris(2-aminoethyl)amine, N,N'-bis(3-aminopropyl)ethylenediamine, polymethylenediamine, trimethylhexamethylenediamine, poly Examples include aliphatic amines such as ether diamines; alicyclic amines such as isophorone diamine, menthane diamine, piperazine, N-aminoethylpiperazine, 3,9-bis(3-aminopropyl)2,4,8,10-tetraoxaspiro(5,5)undecane adduct, bis(4-amino-3-methylcyclohexyl)methane, bis(4-aminocyclohexyl)methane, and modified versions thereof; aliphatic polyamines such as polyethyleneimines and polyalkylene polyamines; (meth)acrylic polymers having amino groups such as aminoethylated acrylic polymers; and aliphatic polyamidoamines formed by the reaction of polyamines with dimer acids. Amine monomers can be used alone or in combination of two or more.

[0057] Examples of epoxy monomers include monofunctional epoxy such as n-butyl glycidyl ether, higher alcohol glycidyl ether, allyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, cresyl glycidyl ether, p-sec-butylphenyl glycidyl ether, and t-butylphenyl glycidyl ether. Examples of compounds include: diepoxyalkanes such as 1,5-hexadiene diepoxide, 1,7-octadiene diepoxide, and 1,9-decadiene diepoxide; polyfunctional epoxy compounds having an ether group, such as (poly)ethylene glycol diglycidyl ether, (poly)propylene glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane polyglycidyl ether, and sorbitol polyglycidyl ether; and polyfunctional epoxy compounds having an amino group, such as N,N,N',N'-tetraglycidylmetoxylendiamine and 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane.

[0058] The epoxy monomer may, in some cases, be an aromatic epoxy resin, a non-aromatic epoxy resin, etc. Examples of aromatic epoxy resins include polyphenyl-based epoxy resins, epoxy resins containing fluorene rings, epoxy resins containing triglycidyl isocyanurate, and epoxy resins containing heteroaromatic rings (e.g., triazine rings). Examples of polyphenyl-based epoxy resins include bisphenol A type epoxy resins, brominated bisphenol A type epoxy resins, bisphenol F type epoxy resins, bisphenol AD ​​type epoxy resins, stilbene type epoxy resins, biphenyl type epoxy resins, bisphenol A novolac type epoxy resins, cresol novolac type epoxy resins, diaminodiphenylmethane type epoxy resins, and tetrakis(hydroxyphenyl)ethane-based epoxy resins. Examples of non-aromatic epoxy resins include aliphatic glycidyl ether type epoxy resins, aliphatic glycidyl ester type epoxy resins, alicyclic glycidyl ether type epoxy resins, alicyclic glycidylamine type epoxy resins, and alicyclic glycidyl ester type epoxy resins.

[0059] Epoxy monomers can be used individually or in combination of two or more. When using monofunctional epoxy compounds, it is preferable to use them in combination with other epoxy monomers containing two or more epoxy groups. Monofunctional epoxy compounds can also be used as reactive diluents to adjust the viscosity of the monomer group for forming reactant P1.

[0060] As described above, polymer P as an amine polymer contains constituent units U1 derived from epoxy monomers. When polymer P is reactant P1, polymer P further contains constituent units U2 derived from amine monomers. The content of constituent units U1 in polymer P, particularly reactant P1, is, for example, 20 wt% to 70 wt%. The content of constituent units U2 in polymer P, particularly reactant P1, is, for example, 30 wt% or more, preferably 50 wt% or more. The upper limit of the content of constituent units U2 is not particularly limited, but is, for example, 80 wt%.

[0061] The glass transition temperature Tg of polymer P is not particularly limited, and is, for example, 40°C or lower, preferably 30°C or lower, more preferably 20°C or lower, even more preferably 15°C or lower, and may be 10°C or lower, 5°C or lower, or 0°C or lower. When the glass transition temperature Tg of polymer P is this low, the adsorbent 10 tends to adsorb acidic gases at a high rate. The lower limit of the glass transition temperature Tg of polymer P is, for example, -100°C, preferably -50°C, and more preferably -10°C, from the viewpoint of ensuring sufficient adsorption of acidic gases in the adsorbent 10 and from the viewpoint of heat resistance. In this specification, the glass transition temperature Tg is the intermediate glass transition temperature (T) determined in accordance with the provisions of JIS K7121:1987. mg This means that polymer P is a solid. Polymer P is typically a thermosetting resin. Polymer P is solid at, for example, 25°C, preferably in the range of 25°C to 80°C.

[0062] The weight-average molecular weight of polymer P is not particularly limited, but is preferably 500 or more. The weight-average molecular weight of polymer P is 1000 or more, more preferably 10000 or more, and even more preferably 100000 or more. The upper limit of the weight-average molecular weight of polymer P is, for example, 10000000 or less.

[0063] The main body of the adsorbent 10 (for example, a sheet-like main body 11) may contain polymer P as its main component, or may be substantially composed solely of polymer P. The main body of the adsorbent 10 (for example, a sheet-like main body 11) may further contain other components besides polymer P. Examples of other components include a carrier for supporting polymer P, a reaction accelerator, a plasticizer, a pigment, a dye, an antioxidant, a conductive material, an antistatic agent, an ultraviolet absorber, a flame retardant, and an antioxidant.

[0064] Examples of carriers include fibers and fiber structures containing fibers. Examples of fibers include glass fibers; natural fibers such as wood pulp, cotton, and hemp (e.g., Manila hemp); and chemical fibers (synthetic fibers) such as polyester fibers, rayon, vinylon, acetate fibers, polyvinyl alcohol (PVA) fibers, polyamide fibers, polyolefin fibers, and polyurethane fibers. Examples of fiber structures include woven fabrics, nonwoven fabrics, and paper. A specific example of a fiber structure is glass paper.

[0065] Reaction accelerators are used, for example, when synthesizing polymer P. Examples of reaction accelerators include tertiary amines such as triethylamine and tributylamine; and imidazoles such as 2-phenol-4-methylimidazole, 2-ethyl-4-methylimidazole, and 2-phenol-4,5-dihydroxyimidazole. These reaction accelerators can accelerate reactions, for example, to synthesize polymer P.

[0066] The polymer P content R1 in the adsorbent 10 is, for example, 5 wt% or more, and may be 10 wt% or more, 15 wt% or more, 20 wt% or more, 25 wt% or more, 30 wt% or more, or even 35 wt% or more. The higher the polymer P content R1, the greater the amount of acidic gas adsorbed by the adsorbent 10 tends to be. The upper limit of the polymer P content R1 is, for example, 80 wt% or less, and may be 60 wt% or less.

[0067] The polymer P content R1 can be measured, for example, by the following method. First, the adsorbent 10 is placed in a simultaneous thermal analysis DSC / TGA instrument. At this time, the temperature is set to 30°C. Next, using this instrument, the temperature is raised from 30°C to 100°C at a heating rate of 10°C / min under a nitrogen atmosphere and held at that temperature for 40 minutes (Operation 1). According to Operation 1, water contained in the adsorbent 10 can be removed. Next, the temperature is raised from 100°C to 800°C at a heating rate of 10°C / min and held at that temperature for 5 minutes (Operation 2). According to Operation 2, polymer P can be removed from the adsorbent 10. The ratio (100 × (W1-W2) / W1) of the difference between the weight W1(g) of the adsorbent 10 immediately after Operation 1 and the weight W2(g) of the adsorbent 10 immediately after Operation 2 can be considered as the polymer P content R1 in the adsorbent 10.

[0068] (Support) The support 12, for example, supports the sheet-like main body 11 and is in direct contact with the sheet-like main body 11. The adsorbent 10 may or may not further include fixing means for fixing the sheet-like main body 11 and the support 12. Specific examples of fixing means include adhesives, and more specifically, adhesive sheets containing adhesives. In this specification, the term "adhesive" is used to encompass pressure-sensitive adhesives.

[0069] Furthermore, the adsorbent 10 may not have a support 12 and may consist only of a sheet-like main body 11. That is, the adsorbent 10 is a self-supporting membrane (single layer membrane) of the sheet-like main body 11. It may be formed from.

[0070] The material of the support 12 is not particularly limited and may include, for example, ceramics such as cordierite, alumina, cordierite-α-alumina, silicon nitride, zircon mullite, scia pyroxene, alumina-silica-magnesia, zircon silicate, sillimanite, magnesium silicate, zircon, feldspar, and aluminosilicate; metals such as aluminum, titanium, copper, stainless steel, Fe-Cr alloy, and Cr-Al-Fe alloy; and silicone resin, polyolefin, polyester, polyurethane, polycarbonate, and polyetheretherketone. Examples of suitable materials include polyphenylene oxide, polyethersulfone, melamine, polyamide, poly(meth)acrylate, polystyrene, poly(meth)acrylonitrile, polyimide, polyfurfural alcohol, phenolfurfuryl alcohol, melamine formaldehyde, resorcinol formaldehyde, cresol formaldehyde, phenol formaldehyde, polyvinyl alcohol dialdehyde, polycyanurate, poly(meth)acrylamide, epoxy resin, agar, agarose, cellulose, and other resins. The material of the support 12 is preferably excellent in thermal conductivity and durability, and is resistant to deterioration such as rust formation and hydrolysis when in contact with water.

[0071] The support 12 may or may not have a porous structure. Examples of a support 12 having a porous structure include paper, nonwoven fabric, foam, and mesh. If the support 12 has a porous structure, for example, the polymer P can be placed inside the pores of the support 12. However, the polymer P does not necessarily have to be located inside the pores of the support 12. Examples of a support 12 not having a porous structure include non-porous sheets and foils. The support 12 may also be an aluminum sheet, paper, or nonwoven fabric.

[0072] The support 12 may function as a planar heater, and may be a planar thermoelectric heater or a Peltier element.

[0073] If the support 12 is in sheet form, the thickness of the support 12 may be, for example, 1000 μm or less, but may also be 500 μm or less, 300 μm or less, or even 250 μm or less. The lower limit of the thickness of the support 12 may be, for example, 50 μm or more, or even 100 μm or more.

[0074] Next, an example of a method for manufacturing the adsorption device 100 shown in Figure 1 will be described. The method for manufacturing the adsorption device 100 includes, for example, an adsorption material manufacturing step for producing the adsorption material 10 shown in Figure 3, and an attachment step for attaching the adsorption material 10 to the housing section 20.

[0075] The adsorbent preparation process includes, for example, step I, applying a coating solution containing a group of compounds for synthesizing polymer P onto a support 12, and step II, reacting the group of compounds to obtain a cured body.

[0076] In the adsorbent manufacturing process, a sheet-like adsorbent can be manufactured, for example, as follows. First, 1.50 parts of poly(1,2-butanediol)-6 propylene glycol (manufactured by NOF Corporation, Uniol® PB-500) and 0.64 parts of a copolymer of butylene glycol and propylene glycol (manufactured by NOF Corporation, Uniol® PB-700) are added to a glass container. 1.28 parts of ethylene glycol diglycidyl ether (manufactured by Nagase ChemteX Corporation, EX-810) are dissolved in the resulting mixture to prepare a mixture of epoxy compounds and phenols. Next, 1.70 parts of polyethyleneimine (manufactured by Nippon Shokubai Co., Ltd., Epomin SP-012) are added to this mixture to prepare a mixture of epoxy compounds, amine compounds, and phenols. The ratio E / A of the equivalent amount of epoxy groups in the epoxy compound to the equivalent amount A of active hydrogen in the primary amino group in the compound is 0.5. Next, a tabletop shaker (Angel Vibrator Digital 60Hz) is set to intensity 5 and the coating solution is shaken for 2 minutes. Next, this coating solution is applied to a 250 μm thick sheet of glass paper (PHN-50GC, manufactured by Oji F-Tex Co., Ltd.) using an applicator. This allows the coating solution to penetrate to position X inside the glass paper. At this time, the amount of coating solution applied is adjusted so that the distance L2 from the surface of the glass paper to position X in the thickness direction of the glass paper is 75 μm (this is step I). Next, the glass paper soaked in the coating solution is left to stand in a 120°C dryer for 30 minutes to cure the coating solution and obtain a cured body (this is step II). The operation of immersing this cured body in ethyl acetate at 60°C for 30 minutes is repeated twice with a change of solution. This removes the pologen from the hardened body, forming a porous, sheet-like main body 11 on the glass paper support 12. The thickness of the main body 11 is the same as the distance L2 mentioned above. Next, the sheet-like adsorbent can be obtained by drying it in a 60°C dryer for 30 minutes.

[0077] Next, the sheet-like adsorption material is cut to a predetermined size and then folded into an accordion shape to a predetermined width. This allows for the production of the adsorption material 10 (unit structure 50 having an accordion structure) shown in Figure 3. Alternatively, the adsorption material 10 shown in Figure 3 may be produced by making the first part 51, second part 52, third part 53, ... nth part from a sheet-like adsorption material, and the first connecting part 61, second connecting part 62, ... (n-1) connecting part from another material. The other material may be, for example, glass paper.

[0078] In the installation process, the inner surface 22b of the lid 22 of the housing 20 and the end 10a of the suction material 10 are joined using an adhesive or adhesive. The bottom surface 21b of the housing 21 of the housing 20 and the end 10b of the suction material 10 are joined using an adhesive or adhesive. In the same manner, multiple suction materials 10 are attached to the housing 20. In this way, the suction device 100 can be manufactured. Note that in the installation process, a portion of the ends 10a and 10b of the suction material 10 may be processed into an adhesive tab and used as a joint.

[0079] The size of the adsorption device 100 is not particularly limited. For example, in the adsorption device 100, the maximum length of the adsorbent material 10 in the extended state during adsorption mode is in the range of 1 to 1.5 m.

[0080] In the examples shown in Figures 1 to 3, the adsorbent material 10 in the adsorption device 100 has a structure that expands and contracts in the Z direction (up and down direction in the figures), but the direction in which the adsorbent material 10 expands and contracts is not limited to the directions shown in Figures 1 to 3. For example, the adsorbent material 10 in the adsorption device 100 may have a structure that expands and contracts in the X direction (left and right direction in the figures). In this case, the opening 21m and bottom surface 21b of the housing 21 may be provided on the YZ plane.

[0081] An example of the adsorption device of this embodiment has been described above using Figures 1 to 4, but the shape of the adsorbent material 10 in the adsorption device of this embodiment is not limited to the example shown in Figures 1 to 4. Below, modifications 1 to 7 of the adsorbent material 10 will be described using Figures 5 to 11.

[0082] (Variation 1) Figure 5 is a schematic cross-sectional view showing Modification 1 of the adsorbent material 10, where (A) shows the extended state and (B) shows the contracted state. The adsorbent material 10 of Modification 1 has a bellows structure so that it can be expanded and contracted in the Z direction. In the adsorbent material 10 of Modification 1, a plurality of unit structures 50 are connected to each other at the second connection part 62, the fourth connection part 64, ... the mth connection part. m is an even number of 2 or more.

[0083] In the modified example 1, the adsorbent material 10 passes through the second connecting portion 62 and further extends a planar portion 71 in the X direction. As shown in Figure 5, the adsorbent 10 may have a first planar portion 71, a second planar portion 72, ... an m / 2 planar portion that extends in the X direction, passing through the second connection portion 62, the fourth connection portion 64, ... the m connection portion, respectively.

[0084] (Modification 2) Figure 6 is a schematic cross-sectional view showing Modification 2 of the adsorbent material 10, where (A) is the extended state, (B) is the state transitioning from the extended state to the contracted state, and (C) is the contracted state. The adsorbent material 10 of Modification 2 has a bellows structure so that it can be expanded and contracted in the Z direction. In the adsorbent material 10 of Modification 2, a plurality of unit structures 50 are connected to each other by first planar sections 71, second planar section 72, ... (n-1) planar sections that extend in the X direction, passing through first connection section 61, second connection section 62, ... (n-1) connection section respectively. n is an integer of 2 or more.

[0085] (Variation 3) Figure 7 is a schematic cross-sectional view showing Modification 3 of the adsorbent material 10, where (A) shows the extended state, (B) shows the state transitioning from the extended state to the contracted state, and (C) shows the contracted state. The adsorbent material 10 of Modification 3 has the same structure as the adsorbent material 10 of Modification 2 shown in Figure 6, except that in the extended state, the unit structure 50 has a slightly contracted structure.

[0086] (Modification 4) Figure 8 is a schematic cross-sectional view showing Modification 4 of the adsorbent material 10, where (A) shows the extended state and (B) shows the contracted state. The adsorbent material 10 of Modification 4 is configured to be expandable and contractible in the Z direction by folding a plurality of sheet-like main body parts 11. Specifically, in the adsorbent material 10 of Modification 4, in the unit structure 50, the angle θ made between the first part 51 and the second part 52 at the connection part 61 does not change with expansion and contraction, but rather the shapes of the first part 51 and the second part 52 themselves change with expansion and contraction. In the example shown in Figure 8, with expansion and contraction, the first part 51 is folded so as to protrude in the -X direction, and the second part 52 is folded so as to protrude in the +X direction.

[0087] In the adsorbent material 10 of the modified example 4, a plurality of unit structures 50 may be connected to each other by first planar sections 71, second planar sections 72, ... (n-1) that extend in the X direction, passing through the first connecting section 61, second connecting section 62, ... (n-1) connecting section, respectively. n is an even number of 2 or more. In the example shown in Figure 8, a plurality of unit structures 50 are connected to each other by first planar sections 71 that pass through the first connecting section 61 and extend in the X direction.

[0088] (Variation 5) Figure 9 is a schematic cross-sectional view showing Modification 5 of the adsorbent material 10, where (A) shows the extended state and (B) shows the contracted state. The adsorbent material 10 of Modification 5 is configured to be expandable and contractible in the Z direction by folding multiple fibrous main body parts 13. In the adsorbent material 10 of Modification 5, the shape of the fibrous main body parts 13 themselves changes as they expand and contract.

[0089] The adsorbent material 10 of the modified example 5 can be formed, for example, by arranging a plurality of fibrous main body portions 13 between a first planar portion 71 and a second planar portion 72 extending in the X direction.

[0090] (Experimental variation 6) Figure 10 is a schematic cross-sectional view showing Modification 6 of the adsorbent material 10, where (A) shows the extended state and (B) shows the contracted state. The adsorbent material 10 of Modification 6 has a bellows structure so that it can be expanded and contracted in the Z direction. Specifically, in the adsorbent material 10 of Modification 6, the angle θ made between the first part 51 and the second part 52 at the connection part 61 changes as the unit structure 50 expands and contracts. In the adsorbent material 10 of Modification 6, the shapes of the first part 51 and the second part 52 themselves do not change as they expand and contract. The adsorbent material 10 of Modification 6 comprises a plurality of unit structures 50 having the above structure. It is preferable to do so.

[0091] In the modified example 6, the adsorbent 10 has grooves 10p between the mountain folds and valley folds of its bellows structure. In the example shown in Figure 10, the adsorbent 10 has grooves 10p between the second part 52 and the third part 53, and between the fourth part 54 and the fifth part 55. With this configuration, for example, in the adsorption mode, when the raw material gas is supplied from the Y direction, the raw material gas can easily pass through the adsorbent 10.

[0092] (Example 7) Figure 11 is a schematic cross-sectional view showing Modification 7 of the adsorbent material 10. Figure 11 shows the extended state of the adsorbent material 10 of Modification 7. The adsorbent material 10 of Modification 7 is formed by a ribbon-shaped main body portion 14 and has a shape like a coil spring. The adsorbent material 10 of Modification 7 is configured to be expandable and contractible in the radial direction. That is, the adsorbent material 10 of Modification 7 has an expandable and contractible structure that expands in a first direction (α direction) or contracts in a second direction (β direction). With the adsorbent material 10 of Modification 7, it is possible to achieve that the volume V1 of the space surrounding the adsorbent material 10 in the extended state is larger than the volume V2 of the space surrounding the adsorbent material 10 in the contracted state.

[0093] [Methods for recovering acidic gases] Next, with reference to Figure 1, a method for recovering acidic gas using the adsorption device 100 described above will be explained. The method for recovering acidic gas using the adsorption device 100 includes bringing the adsorbent 10 into contact with a raw material gas containing acidic gas to adsorb the acidic gas contained in the raw material gas onto the adsorbent 10 (adsorption step), and desorbing the acidic gas from the adsorbent 10 (desorption step). The adsorption step and the desorption step may be repeated in this order.

[0094] The adsorption process is carried out, for example, in the adsorption apparatus 100 shown in Figure 1, as follows. First, the raw material gas is supplied to the adsorption apparatus 100 from the Y direction. At this time, the adsorption apparatus 100 is in the state shown in Figure 1(A), that is, the extended adsorbent material 10 is exposed to the external atmosphere of the containment section 20 (adsorption mode). The raw material gas supplied to the adsorption apparatus 100 is, for example, the atmosphere.

[0095] The raw material gas supplied to the adsorption device 100 moves along the adsorbent 10 and comes into contact with the adsorbent 10. The adsorbent 10, upon contact with the raw material gas, adsorbs the acidic gases contained in the raw material gas. The raw material gas processed by the adsorption device 100 is then discharged to the outside, for example, from the adsorption device 100.

[0096] The desorption process is carried out, for example, in the adsorption device 100 shown in Figure 1, as follows. In the desorption process, the adsorption device 100 is in the state shown in Figure 1(B), that is, the contracted adsorbent 10 is contained in the containment section 20 (desorption mode). For example, the desorption of adsorbed gas from the adsorbent 10 can be promoted by reducing the pressure inside the containment section 20 with a depressurization device. In the desorption process, the pressure inside the containment section 20 may be reduced to 0.1 kPa. In the desorption process, the desorption of adsorbed gas from the adsorbent 10 may be further promoted by heating the adsorbent 10 inside the containment section 20 with a heating device.

[0097] The desorbed gas (adsorbed gas containing acidic gas) is discharged from the adsorption device 100 and stored, for example, in a storage container (not shown). The acidic gas content in the desorbed gas is, for example, 0.1 vol% or more and less than 100 vol%. It is also possible to recover gas with an acidic gas content of approximately 100 vol% as the desorbed gas discharged from the adsorption device 100.

[0098] The process may include a cooling step after the desorption step, in which the adsorbent 10 from which the acidic gas has been desorbed is cooled. The adsorption step, desorption step, and cooling step may be repeated in this order. stomach.

[0099] [Another example of an adsorption device] Figure 12 is a schematic perspective view showing another example of the adsorption device of this embodiment, where (A) shows the state of the first adsorption and desorption mode, and (B) shows the state of the second adsorption and desorption mode.

[0100] In the adsorption device 200 shown in Figure 12, the adsorbent material 10 includes a first adsorbent material 101 and a second adsorbent material 102. The first adsorbent material 101 and the second adsorbent material 102 are arranged in series. In the example shown in Figure 12, the first adsorbent material 101 and the second adsorbent material 102 are connected in a straight line along the Z direction.

[0101] As shown in Figure 12, the first adsorbent 101 and each of the first adsorbent 101 are comprised of multiple unit structures 50.

[0102] The housing section 20 includes a first housing section 201 for housing the first adsorbent 101 in a contracted state and a second housing section 201 for housing the second adsorbent 102 in a contracted state. As shown in Figure 12(A), the first adsorbent 101 in an extended state is exposed to the external atmosphere of the first housing section 201, while the second adsorbent 102 in a contracted state is sealed in the second housing section 202. As shown in Figure 12(B), the second adsorbent 102 in an extended state is exposed to the external atmosphere of the second housing section 201, while the first adsorbent 101 in a contracted state is sealed in the first housing section 201.

[0103] The adsorption device 200 allows for the simultaneous execution of the adsorption mode in the first adsorbent 101 and the desorption mode in the second adsorbent 102 (first adsorption and desorption mode). Furthermore, it allows for the simultaneous execution of the desorption mode in the first adsorbent 101 and the adsorption mode in the second adsorbent 102 (second adsorption and desorption mode). Thus, the adsorption device 200 performs both the first adsorption and desorption mode and the second adsorption and desorption mode. Therefore, adsorption and desorption can be performed continuously without interrupting the supply of the raw material gas.

[0104] In this embodiment, as shown in Figure 12(A), when the first adsorbent 101 extends in the first direction (+Z direction), the second adsorbent 102 contracts in the second direction (-Z direction). When the first adsorbent 101 contracts in the second direction (-Z direction), the second adsorbent 102 extends in the first direction (+Z direction).

[0105] In this embodiment, the first housing 201 has a housing 211 and a lid 221. The housing 211 has an opening 211m. The lid 221 opens and closes the opening 211m. As shown in Figure 12, the first adsorbent 101 may be connected to the housing 211 and the lid 221, respectively. The second housing 202 has a housing 212 and a lid 222. The housing 212 has an opening 212m. The lid 222 opens and closes the opening 212m. As shown in Figure 12, the second adsorbent 102 may be connected to the housing 212 and the lid 222, respectively. The opening 211m of the first housing 201 and the opening 212m of the second housing 202 are arranged opposite each other.

[0106] In the example shown in Figure 12, the lid 221 of the first housing section 201 and the lid 222 of the second housing section 202 are common. Thus, the lid 221 of the first housing section 201 and the lid 222 of the second housing section 202 may be a single common lid. With this configuration, as shown in Figure 12(A), by moving the lid 221 (222) to open the opening 211m, the first adsorbent 101 can be extended and exposed to the external atmosphere of the first housing section 201, and the second adsorbent 102 can be contracted and housed in the second housing section 202. As shown in Figure 12(B), by moving the lid 221 (222) to open the opening 212m, the second adsorbent 102 can be extended and exposed to the external atmosphere of the second housing section 202, and the first The adsorbent material 101 can be contracted and housed in the first housing section 201. Therefore, the first adsorption and desorption mode and the second adsorption and desorption mode can be switched with a simple configuration.

[0107] The adsorption device 200 may further include a switching mechanism (not shown) for switching between a first adsorption and detachment mode and a second adsorption and detachment mode. The switching mechanism may include, for example, a lift (not shown) and a controller (not shown) for moving the lid 221 (222) in a first direction (+Z direction) or a second direction (-Z direction). For example, the first adsorption and detachment mode and the second adsorption and detachment mode can be switched by controlling the lift with the controller and moving the lid 221 (222).

[0108] Although omitted in the example shown in Figure 12, the first housing section 201 and the second housing section 202 may each be equipped with heaters for heating the first adsorbent 101 and the second adsorbent 102, similar to the housing section 20 of the adsorption device 100 described above.

[0109] Next, an example of a method for manufacturing the adsorption device 200 shown in Figure 12 will be described. The method for manufacturing the adsorption device 200 includes, for example, an adsorption material manufacturing step of producing the adsorption material 10 shown in Figure 3, and an attachment step of attaching the adsorption material 10 to the housing section 20.

[0110] The adsorbent material manufacturing process is as described for the adsorption device 100. The adsorbent material manufacturing process allows for the production of the adsorbent material 10 (a unit structure 50 having a bellows structure) shown in Figure 3.

[0111] In the installation process, the inner surface of the lid 221 of the first housing 201 and one end of the suction material 10(101) are joined using an adhesive or adhesive. The bottom surface of the housing 211 of the first housing 201 and the other end of the suction material 10(101) are joined using an adhesive or adhesive. In the same way, multiple suction materials 10(101) are attached to the first housing 201. Also, the inner surface of the lid 222 of the second housing 202 and one end of the suction material 10(102) are joined using an adhesive or adhesive. The bottom surface of the housing 212 of the second housing 202 and the other end of the suction material 10(102) are joined using an adhesive or adhesive. In the same way, multiple suction materials 10(102) are attached to the second housing 202. Finally, the outer surface of the lid 221 and the outer surface of the lid 222 are joined to each other using an adhesive or adhesive. In this way, the suction device 200 can be manufactured. In addition, during the installation process, a portion of both ends of the suction material 10 (101) may be processed into an adhesive tab and used as a joint. Alternatively, a single common lid may be used for both the lid 221 of the first housing section 201 and the lid 222 of the second housing section 202.

[0112] [Methods for recovering acidic gases] Next, with reference to Figure 12, a method for recovering acidic gas using the adsorption device 200 described above will be explained. The method for recovering acidic gas using the adsorption device 200 includes: bringing the first adsorbent 101 into contact with a raw material gas containing acidic gas, so that the acidic gas contained in the raw material gas is adsorbed onto the first adsorbent 101 and the acidic gas is desorbed from the second adsorbent 102 (first adsorption and desorption step); and bringing the second adsorbent 102 into contact with a raw material gas containing acidic gas, so that the acidic gas contained in the raw material gas is adsorbed onto the second adsorbent 102 and the acidic gas is desorbed from the first adsorbent 101 (second adsorption and desorption step). The first adsorption and desorption step and the second adsorption and desorption step may be repeated in this order.

[0113] The first adsorption and desorption process is carried out, for example, in the adsorption apparatus 200 shown in Figure 12, as follows. First, the raw material gas is supplied to the adsorption apparatus 200 from the Y direction. At this time, the adsorption apparatus 200 is in the state shown in Figure 12(A), that is, the first adsorbent 101 in an extended state is exposed to the external atmosphere of the first containment section 201, and the second adsorbent in a contracted state is... The material 102 is sealed in the second containment section 202 (first adsorption and desorption mode). The raw material gas supplied to the adsorption device 200 is, for example, the atmosphere.

[0114] The raw material gas supplied to the adsorption device 200 moves along the first adsorbent 101 and comes into contact with it. The first adsorbent 101, upon contact with the raw material gas, adsorbs the acidic gas contained in the raw material gas. The raw material gas processed by the adsorption device 200 is discharged to the outside, for example, from the adsorption device 200. On the other hand, the desorption of the adsorbed gas from the second adsorbent 102 can be promoted by reducing the pressure inside the second containment section 202, for example, by a depressurizing device. The desorbed gas (adsorbed gas containing acidic gas) is discharged from the adsorption device 200 and stored, for example, in a storage container (not shown).

[0115] The second adsorption and desorption process is carried out, for example, in the adsorption device 200 shown in Figure 12, as follows. In the second adsorption and desorption process, the adsorption device 200 is in the state shown in Figure 12(B), that is, the second adsorbent 102 in an extended state is exposed to the external atmosphere of the second housing 202, and the first adsorbent 101 in a contracted state is sealed in the first housing 201 (second adsorption and desorption mode).

[0116] The raw material gas supplied to the adsorption device 200 moves along the second adsorbent 102 and comes into contact with it. The second adsorbent 102, upon contact with the raw material gas, adsorbs the acidic gas contained in the raw material gas. The raw material gas processed by the adsorption device 200 is discharged to the outside, for example, from the adsorption device 200. On the other hand, the desorption of the adsorbed gas from the first adsorbent 101 can be promoted by reducing the pressure inside the first containment section 201, for example, using a depressurizing device. The desorbed gas (adsorbed gas containing acidic gas) is discharged from the adsorption device 200 and stored, for example, in a storage container (not shown).

[0117] The process may include cooling the first adsorbent 101 from which the acidic gas has been desorbed (first cooling step) after the first adsorption and desorption step. The process may also include cooling the second adsorbent 102 from which the acidic gas has been desorbed (second cooling step) after the second adsorption and desorption step. The first adsorption and desorption step, the first cooling step, the second adsorption and desorption step, and the second cooling step may be repeated in this order.

[0118] The descriptions of each embodiment and each modification described above are interchangeable, insofar as they do not conflict with technical standards. Furthermore, each embodiment and each modification may be combined with each other, insofar as they do not conflict with technical standards. [Industrial applicability]

[0119] The adsorption device and adsorbent of this embodiment are suitable for recovering acidic gases, particularly carbon dioxide. [Explanation of symbols]

[0120] 100, 200 adsorption device 10 Adsorbent 101 1st adsorbent 102 Second adsorbent 10a, 10b end 11 Sheet-shaped main body 12 Support 13. Fibrous main body 14 Ribbon-shaped main body 20 Storage Units 201 First Detention Unit 202 Second Detention Unit 21, 211, 212 enclosures 21m, 211m, 212m opening 21b Bottom 22, 221, 222 Lid 22b Back side 30 Heater 50 Unit Structures 51, 52,... Part 1, Part 2,... 61, 62, ... First connection, second connection, ... 71, 72,... first plane part, second plane part,...

Claims

1. Adhesive material having an expandable structure, A housing section for housing the adsorbent in a contracted state, An adsorption device equipped with the following features.

2. The extended adsorbent is exposed to the external atmosphere of the containment section. The adsorption device according to claim 1, wherein the adsorbent in a contracted state is sealed in the housing.

3. The adsorption mode involves adsorbing acidic gases contained in the raw material gas onto the adsorbent material exposed to the external atmosphere of the containment section, The adsorption apparatus according to claim 2, wherein a desorption mode is performed to desorb the acidic gas from the adsorbent material that adsorbs the acidic gas and is sealed in the containment section.

4. The housing comprises a housing having an opening and a lid that opens and closes the opening. The adsorption device according to claim 1, wherein the adsorption material is connected to the housing and the lid, respectively.

5. The adsorption device according to claim 1, wherein the adsorption material has a first part, a second part, and a connecting part connecting the first part and the second part, and has a structure in which the angle made between the first part and the second part at the connecting part changes as it expands and contracts.

6. The adsorption device according to claim 5, wherein the adsorption material comprises a plurality of unit structures having the above structure.

7. The adsorption apparatus according to claim 1, wherein the adsorbent material comprises a polymer having an amino group.

8. The adsorption apparatus according to claim 7, wherein the polymer comprises an amine polymer having structural units derived from an epoxy monomer.

9. The adsorbent material includes a first adsorbent and a second adsorbent, The housing includes a first housing for housing the first adsorbent in a contracted state and a second housing for housing the second adsorbent in a contracted state. The first adsorbent in its extended state is exposed to the external atmosphere of the first housing, while the second adsorbent in its contracted state is sealed in the second housing. The adsorption device according to claim 1, wherein the second adsorbent in an extended state is exposed to the external atmosphere of the second housing, and the first adsorbent in a contracted state is sealed in the first housing.

10. A first adsorption and desorption mode is provided, in which the first adsorbent, exposed to the external atmosphere of the first containment, adsorbs the acidic gas contained in the raw material gas, and desorbs the acidic gas from the second adsorbent, which is sealed in the second containment and adsorbs the acidic gas. The adsorption apparatus according to claim 9, wherein a second adsorption and desorption mode is performed, in which the second adsorbent, exposed to the external atmosphere of the second containment, adsorbs the acidic gas contained in the raw material gas, and desorbs the acidic gas from the first adsorbent, which is sealed in the first containment and adsorbs the acidic gas.

11. Adhesive material with an expandable structure.

Images