WO2024034511A1 - 二酸化炭素捕集モジュール - Google Patents

二酸化炭素捕集モジュール Download PDF

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Publication number
WO2024034511A1
WO2024034511A1 PCT/JP2023/028402 JP2023028402W WO2024034511A1 WO 2024034511 A1 WO2024034511 A1 WO 2024034511A1 JP 2023028402 W JP2023028402 W JP 2023028402W WO 2024034511 A1 WO2024034511 A1 WO 2024034511A1
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Prior art keywords
carbon dioxide
amine
capture module
filter
based absorbent
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PCT/JP2023/028402
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English (en)
French (fr)
Japanese (ja)
Inventor
学 丸本
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株式会社大真空
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Priority to JP2024540426A priority Critical patent/JPWO2024034511A1/ja
Publication of WO2024034511A1 publication Critical patent/WO2024034511A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides

Definitions

  • the present invention relates to a carbon dioxide capture module that captures carbon dioxide in the air.
  • the present invention has been made in view of the above points, and provides a carbon dioxide capture module that can be used in the living space of a general household and can capture carbon dioxide with a simple structure.
  • the purpose is to
  • the present invention is configured as follows.
  • the carbon dioxide capture module is a carbon dioxide capture module that captures carbon dioxide contained in the air, and includes an absorption section having an amine-based absorbent capable of absorbing carbon dioxide, and a carbon dioxide capture module that captures carbon dioxide contained in the air. and a filter section that allows the permeation of the amine-based absorbent material and blocks the permeation of the amine-based absorbent material, the filter section being located between the absorption section and the air surrounding the carbon dioxide collection module.
  • the amine-based absorbent material is a polymeric amine having a number average molecular weight of 500 or more, or a polymer of an amine monomer and a dicarboxylic acid monomer, and the number average molecular weight is 500 or more.
  • the filter part located between the absorption part having an amine-based absorbent and the surrounding air of the carbon dioxide collection module allows the surrounding air that has passed through the filter part to Carbon dioxide contained in the air can be absorbed by the amine-based absorbent material in the absorption section. Furthermore, by blocking the permeation of the amine-based absorbent material in the filter section, it is possible to prevent the amine-based absorbent material from leaking out of the carbon dioxide collection module.
  • the amine-based absorbent material that absorbs carbon dioxide is a polymeric amine with a number average molecular weight of 500 or more, or a polymer of an amine monomer and a dicarboxylic acid monomer, and the number average molecular weight is 500 or more.
  • These high-molecular amines and polymers are liquids or solids, hardly ever volatilize, and even if they do volatilize, the amount is extremely small and does not affect the human body.
  • the filter section of the carbon dioxide collection module according to the present invention can be made to allow air to pass through it more easily than a filter that can block the permeation of the volatilized amine-based absorbent material. This allows more air to pass through the filter section and be absorbed by the amine-based absorbent material in the absorption section, thereby increasing the carbon dioxide collection rate.
  • the polymeric amine is polyethyleneimine.
  • carbon dioxide can be efficiently captured by polyethyleneimine, which has excellent carbon dioxide absorption ability.
  • the polymer has 3 or more nitrogen atoms per repeating unit.
  • the polymer has an excellent carbon dioxide absorption capacity because the number of nitrogen atoms that contribute to carbon dioxide absorption is 3 or more per repeating unit.
  • the amine-based absorbent material is a liquid or a gel.
  • the amine-based absorbent when the amine-based absorbent is a liquid, it has high fluidity, so the reacted amine-based compound that has absorbed carbon dioxide and the unreacted amine-based compound that has not absorbed carbon dioxide. are easily mixed and homogenized.
  • the amine-based absorbent material when it is a gel, it has lower fluidity than when it is a liquid, so it is less likely to leak outside and has excellent portability.
  • the polymeric amine or the polymer is a liquid
  • the absorption part is an impregnated body impregnated with the polymeric amine or the polymer. has.
  • an impregnated body that absorbs carbon dioxide can be constructed by impregnating a suitable material, such as a sponge, with a liquid high-molecular amine or polymer.
  • the filter section includes a porous material that blocks liquid and allows gas to pass through.
  • the porous material of the filter part allows gaseous air to pass through and allows the amine-based absorbent material of the absorption part to absorb carbon dioxide, while blocking the liquid amine-based absorbent material. , it is possible to prevent the amine-based absorbent from leaking out of the carbon dioxide collection module.
  • the porous material of the filter portion is a polyolefin porous film or a PTFE (polytetrafluoroethylene) porous film.
  • the porous film of the filter portion can block liquid while ensuring breathability. This allows a large amount of air to pass through and allows the amine-based absorbent in the absorption section to absorb carbon dioxide, while blocking the liquid amine-based absorbent and allowing the amine-based absorbent to pass through the carbon dioxide collection module. It can prevent leakage to the outside.
  • the pore diameter of the porous film is 0.1 ⁇ m or more and 100 ⁇ m or less.
  • the porous film has a pore diameter of 0.1 ⁇ m or more, so it can increase air permeability, and the pore diameter is 100 ⁇ m or less, so it can effectively absorb amine-based absorbents. can be shut off.
  • the absorbing section and the filter section are plate-shaped, and the absorbing section is provided with two opposing filter sections on each surface of both surfaces of the absorbing section, and the absorbing section and a sealing part that joins the peripheral ends of the two filter parts and blocks contact of the absorbing part with the surrounding air other than the filter parts.
  • the plate-shaped absorbent part is sandwiched between two plate-shaped filter parts to face each other, and the peripheral edge of the absorbent part and the peripheral edge of the filter part are joined, and the absorbent part
  • parts other than the filter part can be sealed with a sealing part so that they do not come into contact with the surrounding air.
  • a carbon dioxide collection module that prevents leakage of amine-based absorbent material can be created with a simple structure in which a plate-shaped absorption part is sandwiched between two plate-shaped filter parts and their peripheral edges are joined. It can be realized.
  • the sealing portion is made of a resin that has corrosion resistance against the amine-based absorbent material.
  • the sealing part that has corrosion resistance against the amine-based absorbent of the absorption part can stably prevent the amine-based absorbent from leaking out of the carbon dioxide collection module. Moreover, since the sealing part that covers the peripheral edge of the absorbing part and the filter part is made of resin, if an external impact is applied, the impact can be alleviated by the sealing part that covers the peripheral edge.
  • the carbon dioxide contained in the surrounding air that has passed through the filter section can be absorbed by the filter section located between the absorption section having an amine-based absorbent and the air surrounding the carbon dioxide collection module. can be absorbed by the amine-based absorbent material in the absorption section. Furthermore, the filter section can block the permeation of the amine-based absorbent material, thereby preventing the amine-based absorbent material from leaking out of the carbon dioxide collection module.
  • the amine-based absorbent material that absorbs carbon dioxide is a polymeric amine with a number average molecular weight of 500 or more, or a polymer of an amine monomer and a dicarboxylic acid monomer, and the number average molecular weight is 500 or more.
  • the filter section of the carbon dioxide collection module according to the present invention can be made to allow air to pass through it more easily than a filter that can block the permeation of the volatilized amine-based absorbent material. This allows more air to pass through the filter section and be absorbed by the amine-based absorbent in the absorption section, thereby increasing the carbon dioxide collection rate.
  • FIG. 1 is a schematic perspective view of a carbon dioxide capture module according to an embodiment of the present invention.
  • FIG. 2 is a longitudinal sectional view of the carbon dioxide capture module of FIG. 1.
  • FIG. 3 is an exploded perspective view of essential parts of the carbon dioxide capture module of FIG. 1.
  • FIG. 4 is a reaction formula showing an example of a polymerization reaction between an amine monomer and a dicarboxylic acid monomer.
  • FIG. 5 is a reaction formula showing another example of the polymerization reaction of an amine monomer and a dicarboxylic acid monomer.
  • FIG. 6 is a reaction formula showing still another example of the polymerization reaction between an amine monomer and a dicarboxylic acid monomer.
  • FIG. 4 is a reaction formula showing an example of a polymerization reaction between an amine monomer and a dicarboxylic acid monomer.
  • FIG. 5 is a reaction formula showing another example of the polymerization reaction of an amine monomer and a dicarboxy
  • FIG. 7 is a schematic diagram for explaining the operation of the carbon dioxide collection module of FIG. 1.
  • FIG. 8 is a schematic perspective view of a carbon dioxide capture module according to another embodiment of the present invention.
  • FIG. 9 is a longitudinal sectional view of the carbon dioxide capture module of FIG. 8.
  • FIG. 10 is a longitudinal sectional view corresponding to FIG. 9 of a carbon dioxide capture module according to another embodiment of the present invention.
  • FIG. 11 is a schematic perspective view corresponding to FIG. 1 of a carbon dioxide capture module according to still another embodiment of the present invention.
  • FIG. 12 is a longitudinal sectional view of the carbon dioxide capture module of FIG. 11.
  • FIG. 13 is a schematic perspective view of a carbon dioxide capture module according to still another embodiment of the present invention.
  • FIG. 14 is a longitudinal sectional view of the carbon dioxide capture module of FIG. 13.
  • FIG. 15 is a schematic perspective view corresponding to FIG. 1 of a carbon dioxide capture module according to still another embodiment of the present invention.
  • FIG. 1 is a schematic perspective view of a carbon dioxide capture module 1 according to an embodiment of the present invention
  • FIG. 2 is a longitudinal sectional view thereof
  • FIG. 3 is an exploded perspective view of the main parts thereof.
  • the carbon dioxide collection module 1 of this embodiment is a module that is placed, for example, in a living space such as an indoor room of a general household, and is used to collect a small amount of carbon dioxide contained in the surrounding air.
  • This carbon dioxide collection module 1 includes a rectangular plate-shaped absorption section 2 containing an amine-based absorbent that absorbs carbon dioxide, and a rectangular plate-shaped absorption section 2 that is disposed in close contact with both sides of the absorption section 2 so as to face each other.
  • the filter section 3 is provided with two filter sections 3.
  • the absorption section 2 and the two filter sections 3 have the same rectangular size.
  • the absorbent part 2 is sandwiched between two filter parts 3 and brought into close contact with each other, and in this state, each rectangular peripheral end part is joined together into a frame shape by a sealing part 4 and sealed.
  • Each of the two filter sections 3 allows air to pass through and blocks the amine absorbent from passing through.
  • the filter section 3 includes a porous film 6 and a support 5 that supports the porous film 6, as described later.
  • the absorption section 2 has an amine-based absorbent material that absorbs a small amount of carbon dioxide contained in the air.
  • This amine-based absorbent material is a polymeric amine having a number average molecular weight of 500 or more, or a polymer of an amine monomer and a dicarboxylic acid monomer and having a number average molecular weight of 500 or more.
  • the filter section 3 does not need to block the permeation of the volatilized amine-based absorbent.
  • the filter section 3 may have a lower performance in blocking gas permeation than a filter that can block the permeation of the volatilized amine-based absorbent material, and the filter part 3 is made easier for air to permeate. .
  • polyethyleneimine is preferable, and the number average molecular weight is preferably 10,000 or more and 100,000 or less.
  • the polyethyleneimine may be a liquid branched polyethyleneimine or a solid linear polyethyleneimine.
  • the amine monomer used in the synthesis of the polymer preferably has one or more imino groups (-NH-) and two or more amino group terminals (-NH 2 ).
  • the amine monomer include diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine.
  • dicarboxylic acid monomers used in the synthesis of the polymer include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, o-phthalic acid, m- Examples include phthalic acid and p-phthalic acid.
  • FIG. 4 shows a reaction formula for synthesizing a polymer when diethylenetriamine is used as an amine monomer and succinic acid is used as a dicarboxylic acid monomer.
  • the polymer is synthesized by condensation polymerization (polycondensation) involving dehydration of an amine monomer and a dicarboxylic acid monomer.
  • the synthesized polymer has an amide bond, which is a bond between a carbonyl group and nitrogen, and the secondary amine site other than the amide bond has the ability to absorb carbon dioxide.
  • the number of nitrogen atoms per repeating unit is three. Moreover, the molar mass per repeating unit of the polymer is 185.2 g/mol. Therefore, the number of nitrogen per 1 g/mol is 0.016.
  • the number of nitrogen atoms per repeating unit of the polymer is three. Moreover, the molar mass per repeating unit of the polymer is 269.4 g/mol. Therefore, the number of nitrogen per 1 g/mol is 0.011.
  • the number of nitrogen atoms constituting the imino group that contributes to carbon dioxide absorption is large, the carbon dioxide absorption ability will be good.
  • the number of nitrogen atoms per repeating unit is preferably 3 or more.
  • the number of nitrogen atoms per repeating unit of the polymer is six. Moreover, the molar mass per repeating unit of the polymer is 286.4 g/mol. Therefore, the number of nitrogen per 1 g/mol is 0.021.
  • polyethyleneimine which is a polymeric amine
  • This polyethyleneimine has a number average molecular weight of 10,000 or more and 100,000 or less, as described above.
  • This polyethyleneimine is a branched polyethyleneimine and is liquid.
  • the absorbent section 2 is composed of an impregnated body in which a porous material is impregnated with liquid polyethyleneimine.
  • a porous material such as activated carbon, porous ceramic materials such as mesoporous silica, zeolite, porous alumina, porous resin materials, etc. can be used.
  • porous alumina substrate is used as the porous material.
  • the porous alumina substrate is impregnated with polyethyleneimine, for example, as follows.
  • liquid polyethyleneimine is mixed with a solvent, a porous alumina substrate is immersed in this mixed solution for a certain period of time, and polyethylene is coated on the outer surface of the porous alumina substrate and the inner surface of the fine pores inside. Penetrate imine. Thereafter, by heating and reducing pressure to evaporate only the solvent, polyethyleneimine is deposited on the outer surface of the porous alumina substrate and the inner surface of the fine pores therein.
  • the absorption section 2 is composed of an impregnated body in which a porous alumina substrate is impregnated with liquid polyethyleneimine, which is an amine-based absorbent, so that carbon dioxide is absorbed into the fine pores inside the alumina substrate.
  • liquid polyethyleneimine which is an amine-based absorbent.
  • the area that can come into contact with the polyethyleneimine coated on the inner surface increases. As a result, much carbon dioxide is absorbed by the polyethyleneimine of the absorption section 2, and the carbon dioxide collection rate can be increased.
  • the two filter sections 3 that are closely arranged to sandwich the absorbing section 2 are capable of transmitting air and blocking the permeation of the amine-based absorbent material.
  • Polyethyleneimine which is the amine-based absorbent material of this embodiment, is a polymeric amine with a number average molecular weight of 500 or more, so as mentioned above, it has almost no volatility, and even if it does volatilize, it is extremely small, and it is not harmful to the human body. will not affect.
  • a low-molecular-weight amine such as ethanolamine
  • zeolite membranes block the permeation of low-molecular-weight amines such as volatilized ethanolamine through their molecular sieving action, and their pores are small in diameter, allowing a large amount of air to pass through efficiently. It is difficult to do so.
  • the amine-based absorbent material of this embodiment is polyethyleneimine, which is a high-molecular amine, and does not volatilize like ethanolamine, which is a low-molecular amine, so it blocks the permeation of the volatilized amine. There's no need to.
  • the filter section 3 of this embodiment does not have the ability to block gas permeation to the extent that it blocks the permeation of the volatilized amine-based absorbent material. That is, the filter portion 3 allows air to pass through it more easily than the filter made of the above-mentioned zeolite membrane, etc., which can block the permeation of volatilized amine-based absorbents such as low-molecular-weight amines.
  • the material constituting the filter portion 3 does not need to have the function of blocking the permeation of the volatilized amine-based absorbent as described above, but only needs to be able to block the liquid amine-based absorbent.
  • the material for the filter section 3 is preferably a porous material, and specifically, for example, a film or sheet such as a polyolefin porous film or a PTFE (polytetrafluoroethylene) porous film.
  • a film or sheet such as a polyolefin porous film or a PTFE (polytetrafluoroethylene) porous film.
  • porous materials such as porous resins, porous ceramics such as aluminum oxide (alumina), and mullite.
  • This porous material preferably has an air permeability of 0.1 cm 3 /cm 2 ⁇ sec or more in the Frazier method, which is an air permeability test.
  • the porous material itself preferably has hydrophobicity in order to prevent the permeation of the liquid amine-based absorbent material.
  • each filter section 3 includes a porous film 6 made of PTFE (polytetrafluoroethylene) as a filter, supports this porous film 6, and protects this porous film 6 from being damaged.
  • a support body 5 is provided.
  • This porous film 6 is breathable and blocks liquid, and has pores communicating on both the front and back sides.
  • the diameter of this pore is preferably from 0.1 ⁇ m to 100 ⁇ m.
  • the porous film 6 has a pore diameter larger than 0.1 ⁇ m, so it has good air permeability, and the carbon dioxide that passes through the porous film 6 and is absorbed by the absorption section 2. Collection ability improves.
  • the porous film 6 has a pore diameter of 100 ⁇ m or less, it can effectively block amine-based absorbents.
  • the support 5 does not inhibit the air permeability of the porous film 6, stably supports the porous film 6, and protects the porous film 6 from being damaged. Since this support 5 only needs to have air permeability, a mesh material made of resin or metal, a glass material such as glass wool, or the like can be used. In addition, if it has sufficient air permeability to allow air to pass through, a porous material made of ceramic such as aluminum oxide (alumina), mullite, resin such as epoxy, etc., which constitutes the impregnated body of the absorbent part 2, may be used. be able to.
  • the support body 5 is made of ceramic, deformation due to external impact or thermal history can be suppressed.
  • the weight of the carbon dioxide collection module can be reduced.
  • the support body 5 is made of a metal mesh, the heat conduction of the support body 5 will be faster, so the temperature unevenness of the entire carbon dioxide collection module 1 will be reduced during heating to recover carbon dioxide, which will be described later. Furthermore, during cooling after heating to recover carbon dioxide, heat is easily dissipated and the temperature can be lowered quickly.
  • the plate-shaped support 5 has sufficient air permeability, and is made of a porous ceramic substrate such as an alumina substrate made of aluminum oxide (alumina), for example.
  • a peripheral portion of a rectangular porous film 6 is bonded to one main surface of a rectangular plate-shaped support 5 made of this porous ceramic substrate. Note that the porous film 6 may be bonded to the support 5 not only at the peripheral portion but also at its entire surface.
  • the two filter sections 3 face each other so that the porous film 6 provided on one main surface faces the absorption section 2 .
  • the porous film 6 faces the absorbent section 2 on the inside, and the support body 5 faces on the outside where it comes into contact with the surrounding air. Therefore, the inner porous film 6 is protected by the outer support 5 serving as a cover, and can be prevented from being damaged.
  • the sealing part 4 is formed in a rectangular frame shape so as to cover the peripheral edges of the absorbing part 2 and the two filter parts 3 that are closely attached to sandwich the absorbing part 2.
  • This sealing part 4 blocks the absorption part 2 from contact with the surrounding air except for the filter part 3, and the amine-based absorbent material in the absorption part 2 leaks to the outside from this sealing part 4.
  • the sealing part 4 is preferably made of a corrosion-resistant material, particularly an alkali-resistant resin material, such as polyethylene, polypropylene, nylon, polytetrafluoroethylene, ethylene tetrafluoroethylene, phenolic resin, or, Preferably, it is an epoxy resin or the like.
  • a corrosion-resistant material particularly an alkali-resistant resin material, such as polyethylene, polypropylene, nylon, polytetrafluoroethylene, ethylene tetrafluoroethylene, phenolic resin, or, Preferably, it is an epoxy resin or the like.
  • FIG. 7 is a schematic diagram for explaining the operation of the carbon dioxide capture module 1 of this embodiment.
  • Air containing nitrogen (N 2 ), oxygen (O 2 ), etc. other than carbon dioxide (CO 2 ) is not absorbed by the absorption section 2 and passes through the porous film 6 that constitutes the other filter section 3. , further passes through the support 5 and reaches the outside of the carbon dioxide collection module 1 .
  • the air surrounding the carbon dioxide collection module 1 passes through the support 5 and the porous film 6 of the filter section 3, and carbon dioxide (CO 2 ) contained in the permeated air is transferred to the absorption section 2. is absorbed and collected by the amine-based absorbent material.
  • the filter section 3 since the polyethyleneimine which is the amine-based absorbent in the absorption section 2 does not volatilize, the filter section 3 does not need to block the permeation of the volatilized amine-based absorbent; A porous film 6 is used. As a result, more air passes through the filter section 3 than, for example, in a filter section using a zeolite membrane that can block the permeation of volatilized low-molecular-weight amines. Therefore, carbon dioxide contained in the air is efficiently absorbed by the amine-based absorbent material of the absorption section 2, and the carbon dioxide collection rate is improved.
  • the carbon dioxide collection module 1 may be installed in an environment where air easily circulates. Alternatively, a mechanism for forcibly circulating air using a blower or the like may be added. In addition, in the embodiment described above, an example was shown in which the air is directed toward the carbon dioxide collection module 1 by the flow of wind, but even in a case of no wind without wind flow, a small amount of air contained in the air Carbon dioxide can be captured.
  • the polymeric amine with a number average molecular weight of 500 or more and the above-mentioned polymer impregnated in the impregnated body of the absorption part 2 do not volatilize as described above, so the polymeric amine and polymer are absorbed into the porous material of the filter part 3. It does not pass through the film 6. Therefore, the harmful amine-based absorbent in the absorption section 2 does not leak out of the carbon dioxide collection module 1.
  • the carbon dioxide collection module 1 of this embodiment uses a chemical absorption method in which carbon dioxide contained in the air is absorbed by an amine-based absorbent material, and uses polymeric amines and heavy carbon dioxide with a number average molecular weight of 500 or more. It is possible to prevent the non-volatile amine-based absorbent material formed by the coalescence from leaking out of the carbon dioxide collection module 1.
  • a simple structure in which a rectangular peripheral edge of a so-called sandwich structure in which a rectangular plate-shaped absorption part 2 is sandwiched between two rectangular plate-shaped filter parts 3 is sealed with a sealing part 4 is adopted. It is. Therefore, for example, it is possible to capture a small amount of carbon dioxide in the air by installing it stationary or hanging it in a residential space such as the interior of a general home or the inside of a car.
  • the size of this carbon dioxide capture module 1 is not particularly limited, but it is preferably a portable size that can be easily carried indoors where many people gather, and the vertical and horizontal dimensions of the rectangular plate are, for example, A4. Preferably, it is about the same size.
  • a handle or the like may be formed on the upper end surface of the frame-shaped sealing part 4 so that it can be easily carried. For example, after a predetermined period of time has elapsed, the used carbon dioxide collection module 1 absorbed by the amine-based absorbent of No. 2 is collected at a factory or the like equipped with a regeneration furnace. A large number of used carbon dioxide collection modules 1 collected at a factory or the like are heated to, for example, about 120° C.
  • polyethyleneimine which is the amine-based absorbent material of this embodiment, has a boiling point of 150° C. or higher, it is possible to suppress the volatilization of carbon dioxide during heating to desorb it.
  • the carbon dioxide released from the carbon dioxide collection module 1 is recovered, and the recovered carbon dioxide can be used for other purposes such as artificial photosynthesis, which synthesizes chemicals using solar energy. .
  • the carbon dioxide collection module 1 which has been regenerated by releasing carbon dioxide from the amine-based absorbent material in the absorption section 2, is delivered to each home again. In this way, the carbon dioxide capture module 1 can be used for a long period of time by repeating the cycle of capturing, recovering, and regenerating carbon dioxide.
  • a carbon dioxide collection module 1 having a substantially rectangular parallelepiped shape has two rectangular plate-shaped filter parts 3 disposed facing each other on both sides of a rectangular plate-shaped absorption part 2, and the peripheral edges thereof are sealed.
  • the absorption section 2 and the filter section 3 are not limited to the rectangular plate shape, but may have other shapes.
  • the material of the impregnated body impregnated with the amine-based absorbent material of the absorption section 2 and the support body 5 of the filter section 3 may also be made of other materials.
  • the carbon dioxide collection module 1a may have a substantially cylindrical shape.
  • a cylindrical absorption section 2a is inserted into a cylindrical filter section 3a, and its upper and lower ends are sealed with sealing sections 4a.
  • the absorbent section 2a uses a sponge made of polyurethane, melamine resin, etc., instead of the porous alumina substrate described above, as the porous material impregnated with polyethyleneimine, which is an amine-based absorbent. are doing.
  • the absorbent portion 2a is constituted by an impregnated body in which a cylindrical sponge is impregnated with liquid polyethyleneimine. Note that this impregnation differs from the impregnation of the porous alumina substrate in the embodiment described above, in that it is only necessary to impregnate the sponge with liquid polyethyleneimine and hold it therein.
  • the absorbent portion 2a can be formed into an impregnated body by simply impregnating a sponge with liquid polyethyleneimine. Therefore, compared to the above embodiment in which a porous alumina substrate is immersed in a mixture of a solvent and liquid polyethyleneimine, and then heated and depressurized to volatilize the solvent, the impregnated body can be easily formed. Can be configured. Furthermore, since the sponge has a higher internal porosity than a porous alumina substrate, it is possible to contain more polyethyleneimine per unit volume of the sponge.
  • the support body 5a of the cylindrical filter part 3a is composed of a cylindrical metal mesh.
  • a porous film 6a made of PTFE (polytetrafluoroethylene) similar to the above embodiment is bonded to the inner circumferential surface of the support 5a made of this metal mesh, thereby forming the filter portion 3a.
  • the absorbent part 2a By forming the absorbent part 2a in a cylindrical shape, the absorbent part 2a can be made larger and the content of the amine-based absorbent material can be increased compared to the plate-like absorbent part 2 of the above embodiment.
  • the impregnated body made by impregnating a sponge with liquid polyethyleneimine is not limited to the above-mentioned cylindrical shape, but for example, it can be made into many small individual sponge pieces made of polyhedrons such as cubes. It may also be constructed by impregnating it with an absorbent material.
  • the liquid amine-based absorbent material can easily penetrate during impregnation, and breathability is also improved.
  • the support 5a made of a cylindrical metal mesh is configured in the shape of a cylindrical container with a bottom, and the amine-based absorbent material leaks onto the inner circumferential side of the container-shaped support 5a.
  • contain porous film For prevention, contain porous film. A large number of sponge pieces impregnated with an amine-based absorbent may be housed on the inner peripheral side of this porous film to form an absorbent section.
  • FIG. 10 is a longitudinal sectional view corresponding to FIG. 9 of another embodiment of the present invention.
  • the support 5a made of a metal mesh of the filter part 3a in FIG. 5b to constitute the filter section 3b.
  • the support body 5b of the filter portion 3b By constructing the support body 5b of the filter portion 3b from porous ceramic in this way, the rigidity can be increased compared to the support body 5a made of a metal mesh. This makes it possible to stably support the porous film 6a and the absorbent portion 2a on the inner peripheral side of the cylindrical support body 5b, and also protect them and prevent them from being damaged.
  • FIG. 11 is a schematic perspective view of a carbon dioxide capture module 1c according to still another embodiment of the present invention
  • FIG. 12 is a longitudinal sectional view thereof.
  • the rigidity is increased, but the air permeability is lowered compared to a metal mesh.
  • the support body 5c of the filter part 3c is comprised of a cylindrical first support body 5c1 serving as an inner cylinder, and a cylindrical second support body 5c2 serving as an outer cylinder provided concentrically on the outer peripheral side of the first support body 5c1. It is composed of
  • the first support body 5c1 is made of a metal mesh similar to the embodiment shown in FIG. 9 above.
  • the second support body 5c2 is made of punched metal processed into a cylindrical shape, and in this embodiment, it is made of punched metal in which a large number of circular holes 5c2a are formed in a stainless steel metal plate.
  • a porous film 6a is bonded to the inner peripheral side of the first support body 5c1 made of a metal mesh, as in the embodiment shown in FIG. 9 above.
  • a filter section 3c is constituted by this porous film 6a and a support body 5c having first and second support bodies 5c1 and 5c2.
  • the absorbent section 2a is made of a sponge impregnated with polyethyleneimine, which is an amine-based absorbent, as in the embodiment shown in FIG. 9 above.
  • the first support body 5c1 made of a metal mesh faces the outside from a large number of round holes 5c2a formed in the second support body 5c2 made of punched metal. That is, since the metal mesh of the first support body 5c1 is exposed, compared to the carbon dioxide collection module 1b of FIG. 10 in which the support body 5b is made of porous ceramic instead of the metal mesh, Breathability can be improved.
  • the second support body 5c2 made of punched metal can increase the rigidity, it is possible to stably support the porous film 6a and the absorbent part 2a on the inner peripheral side, and also protect them and prevent them from being damaged. It is possible to prevent this from happening.
  • the second support body 5c2 has a large number of round holes 5c2a, so that the first support body 5c1 made of metal mesh faces the outside to increase air permeability, and at the same time, it is necessary to increase the rigidity to prevent damage. be.
  • the aperture ratio of the punching metal such as the number and size of the round holes 5c2a of the second support body 5c2, as well as the material, thickness, etc., are appropriately selected in consideration of the air permeability, the rigidity, and the like.
  • the aperture ratio of the punching metal constituting the second support body 5c2 is selected as appropriate, and the holes in the punching metal are not limited to circular shapes, but may have other shapes such as square holes or elongated holes. Often, the size, number, arrangement, etc. of the holes are also selected appropriately.
  • the size of the holes in the second support body 5c2 may be reduced and the number of holes may be increased to approximate the function of a metal mesh.
  • the first support body 5c1 made of metal mesh may be omitted, and the support body may be configured only with the second support body 5c2 made of punched metal having a large number of small holes.
  • the carbon dioxide capture module has a substantially cylindrical (cylindrical) carbon dioxide trapping module, as shown in the schematic perspective view of FIG. 13 and FIG. It may also be used as a collection module 1d.
  • the cylindrical absorption part 2d is constructed by impregnating a cylindrical porous base material with an amine-based absorbent material in the same manner as in the embodiment shown in FIG. 1 above.
  • This porous substrate is a porous material similar to the embodiment shown in FIG. 1, and is made of, for example, porous ceramic.
  • the first filter section 3d1 which serves as an inner cylinder, is constructed by bonding a porous film 6d1 made of PTFE (polytetrafluoroethylene) to the outer peripheral surface of a cylindrical porous base material 5d1 as a support.
  • the second filter part 3d2 which serves as an outer cylinder, is constructed by joining a porous film 6d2 made of PTFE (polytetrafluoroethylene) to the inner peripheral surface of a cylindrical porous base material 5d2 as a support. has been done.
  • the cylindrical absorption part 2d allows surrounding air to flow not only from the second filter part 3d2, which is the outer cylinder, but also from the first filter part 3d1, which is the inner cylinder. Carbon dioxide can be efficiently absorbed by the absorption section 2d.
  • rectangular plate-shaped filter parts 3, 3 are arranged on both sides of the rectangular plate-shaped absorption part 2, and the terminal ends of the rectangles are sealed with the sealing part 4.
  • two disk-shaped filter sections 3e are arranged oppositely on both sides of a disk-shaped absorption section.
  • the circular peripheral end portion may be sealed with a sealing portion 4e to form a substantially disk-shaped carbon dioxide collection module 1e.
  • the carbon dioxide capture module is not limited to each of the above shapes, but may have other shapes such as a spherical shape.
  • the porous film is provided on the inner surface of the carbon dioxide capture module that is not exposed to the outside, but it may be provided on the outer surface of the carbon dioxide capture module that is exposed to the outside, or may be provided on the inner surface of the carbon dioxide capture module that is exposed to the outside. and may be provided on both the outer surface side.
  • the filter part is provided with a porous film on the support, but in other embodiments of the present invention, the support is omitted and the porous film is provided on the outer surface of the absorbent part, for example. It may also be provided on the outer surface of an impregnated body impregnated with an amine-based absorbent. In this case, the sealing portion may be omitted by providing the porous film over the entire outer surface of the impregnated body.
  • a gel-like amine-based absorbent may be used instead of the above-mentioned liquid amine-based absorbent.
  • a gel-like product has lower fluidity than a liquid, so it is less likely to leak outside and has excellent portability.
  • the absorption section is composed of an impregnated body impregnated with a liquid amine-based absorbent, but it is used as a liquid without being impregnated with an amine-based absorbent. You may.
  • the filter section may be configured in the shape of a container, and the liquid amine-based absorbent material may be contained and sealed in the container-shaped filter section.

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PCT/JP2023/028402 2022-08-09 2023-08-03 二酸化炭素捕集モジュール WO2024034511A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61227821A (ja) * 1985-04-01 1986-10-09 Kawasaki Heavy Ind Ltd 炭酸ガスの除去方法
JP2007190529A (ja) * 2006-01-23 2007-08-02 Sumika Chemtex Co Ltd 酸性ガス吸収体及び該吸収体を含む空気浄化装置
JP2010155753A (ja) * 2008-12-26 2010-07-15 Toshiba Corp 炭酸ガス回収剤及び炭酸ガス回収方法
WO2019059368A1 (ja) * 2017-09-25 2019-03-28 株式会社クラレ 炭酸ガス吸収体およびそれを含む非水電解質蓄電池、並びに炭酸ガスの分離回収方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61227821A (ja) * 1985-04-01 1986-10-09 Kawasaki Heavy Ind Ltd 炭酸ガスの除去方法
JP2007190529A (ja) * 2006-01-23 2007-08-02 Sumika Chemtex Co Ltd 酸性ガス吸収体及び該吸収体を含む空気浄化装置
JP2010155753A (ja) * 2008-12-26 2010-07-15 Toshiba Corp 炭酸ガス回収剤及び炭酸ガス回収方法
WO2019059368A1 (ja) * 2017-09-25 2019-03-28 株式会社クラレ 炭酸ガス吸収体およびそれを含む非水電解質蓄電池、並びに炭酸ガスの分離回収方法

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