Honeycomb adsorption member

Abstract

To provide a honeycomb adsorbent member which is capable of restricting a temperature rise in an adsorbent material using a simple constitution.SOLUTION: A honeycomb adsorbent member 10 includes: a plurality of cells 40 partitioned by partition walls 20; an adsorbent material 50 capable of adsorbing a desired substance; and a heat storage material 60 which is disposed in a second cell 42, and capable of storing heat by utilizing a heat reserve at the time of a phase change.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a honeycomb adsorbent member.

Background Art

[0002] Conventionally, a honeycomb adsorbent member having a plurality of cells partitioned by partition walls has been used for the purpose of adsorbing a desired substance contained in a mixed fluid with an adsorbent. For example, Patent Document 1 discloses a honeycomb adsorbent member in which an adsorbent for adsorbing carbon dioxide (CO2) contained in air or combustion gas is provided on at least one of the partition walls and inside the partition walls.

[0003] Generally, when adsorbing a desired substance contained in a mixed fluid with an adsorbent, the adsorbent generates heat and its adsorption capacity decreases. Therefore, in Patent Document 1, in order to suppress the decrease in the adsorption capacity of the adsorbent that generates heat due to the adsorption of CO2 as the temperature rises, it has been proposed to flow a cooling fluid through some of the cells.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the honeycomb adsorbent member disclosed in Patent Document 1, a device for introducing and recovering the cooling fluid is required.

[0006] An object of the present invention is to provide a honeycomb adsorbent member capable of suppressing an increase in the temperature of the adsorbent with a simple configuration.

Means for Solving the Problems

[0007] The honeycomb adsorption member according to the present invention includes a plurality of cells partitioned by partition walls, an adsorbent capable of adsorbing a desired substance, and a heat storage material disposed in some of the plurality of cells and capable of storing heat by utilizing the latent heat during a phase change.

Effect of the Invention

[0008] According to the present invention, it is possible to provide a honeycomb adsorption member capable of suppressing the temperature rise of the adsorbent with a simple configuration.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0010] 1. First Embodiment FIG. 1 is a perspective view of a honeycomb adsorption member 10 according to the first embodiment. FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1.

[0011] The honeycomb adsorption member 10 is used to adsorb a desired substance contained in a mixed fluid. A honeycomb means a structure including a plurality of cells partitioned by partition walls.

[0012] The honeycomb adsorption member 10 is a flow-through type honeycomb structure, and the cells through which the mixed fluid flows are open at both end faces of the honeycomb structure.

[0013] The honeycomb adsorption member 10 is formed in a columnar shape. In the present embodiment, the honeycomb adsorption member 10 is formed in a quadrangular columnar shape, but it may be formed in a cylindrical shape, a triangular columnar shape, a polygonal columnar shape with five or more sides, or the like. The honeycomb adsorption member 10 has a first end face S1 and a second end face S2. The first end face S1 is provided on the opposite side of the second end face S2.

[0014] As shown in FIGS. 1 and 2, the honeycomb adsorption member 10 includes a partition wall 20, an outer wall 30, a plurality of cells 40, an adsorbent 50, and a heat storage material 60.

[0015] The partition wall 20 is formed in a lattice shape. The partition wall 20 can be constituted by a porous material containing pores inside. Examples of such a porous material include cordierite, mullite, zirconium phosphate, aluminum titanate, silicon carbide, silicon-silicon carbide composite (e.g., Si-bonded SiC), cordierite-silicon carbide composite, zirconia, spinel, indialite, sapphirine, corundum, titania, silicon nitride, or a mixture thereof.

[0016] When the partition wall 20 is constituted by a porous material, it is preferable that at least a part of the pores in the partition wall 20 are filled with a heat conduction material. Thereby, heat can be efficiently conducted from the adsorbent 50 to the heat storage material 60 through the partition wall 20. As the heat conduction material, silicon (Si), aluminum (Al), copper (Cu), lead (Pb), tin (Sn), zinc (Zn), indium (In), iron (Fe), and an alloy containing at least one of these can be used. The heat conduction material can be filled into the pores by heating it to a temperature equal to or higher than its melting point.

[0017] However, the partition wall 20 may be constituted by a dense material.

[0018] The outer wall 30 is formed in a cylindrical shape. The outer wall 30 surrounds the outside of the partition wall 20. The outer wall 30 may be integrally formed with the partition wall 20, or may be an outer peripheral coat layer formed by applying an outer peripheral coating material so as to surround the partition wall 20.

[0019] Each of the plurality of cells 40 is partitioned by the partition wall 20. In the present embodiment, the cross-sectional shape of each of the plurality of cells 40 is rectangular, but it may be a closed figure other than a rectangle composed of straight lines and curves, such as a circle, a triangle, a polygon with five or more sides, or a sector.

[0020] The plurality of cells 40 includes a first cell 41 and a second cell 42. The first cell 41 is a cell different from the second cell 42.

[0021] As shown in FIG. 2, one end of the first cell 41 opens to the first end face S1, and the other end of the first cell 41 opens to the second end face S2. The mixed fluid containing the desired substance flows into the first cell 41 from one end of the first cell 41.

[0022] An adsorbent 50 is disposed on the inner surface of the first cell 41. The adsorbent 50 may cover the entire surface of the first cell 41 or may cover a part of the surface of the first cell 41.

[0023] The adsorbent 50 adsorbs the desired substance contained in the mixed fluid. For example, when the mixed fluid is air and the desired substance is carbon dioxide (CO2), a solid amine-based material can be used as the adsorbent 50. However, the adsorbent 50 only needs to be capable of adsorbing the desired substance and can be appropriately selected according to the composition of the desired substance.

[0024] The adsorbent 50 generates heat during the adsorption process of adsorbing the desired substance. When the temperature of the adsorbent 50 rises, the adsorption capacity of the adsorbent 50 tends to decrease.

[0025] Note that the adsorbent 50 may be supported inside a porous support. The support can be composed of, for example, mesoporous alumina or the like.

[0026] As shown in Fig. 2, one end of the second cell 42 is closed at the first end face S1, and the other end of the second cell 42 is closed at the second end face S2. Specifically, one end of the second cell 42 is sealed by the first sealing portion 70, and the other end of the second cell 42 is sealed by the second sealing portion 80.

[0027] A heat storage material 60 is disposed in the second cell 42. The heat storage material 60 is a material capable of storing heat by utilizing the latent heat during a phase change. The heat storage material 60 may be a material whose crystal phase changes according to temperature, or a material that changes between at least two phases among the three phases (solid phase, liquid phase, gas phase) according to temperature. Examples of the material whose crystal phase changes according to temperature include vanadium dioxide (VO2)-containing substances. Examples of the material that changes between three phases according to temperature include sodium sulfate decahydrate, paraffin, and the like. Since the heat storage material 60 maintains the temperature at which the phase change occurs until the phase change is completely finished, the temperature of the honeycomb adsorption member 10 can be maintained at the temperature at which the phase change occurs even during the adsorption process.

[0028] Heat generated by the adsorption process in the adsorbent 50 is transmitted to the heat storage material 60 through the partition wall 20, and the heat transmitted to the heat storage material 60 is stored in the heat storage material 60 by the phase change of the heat storage material 60. In this way, since the heat generated in the adsorbent 50 can be stored in the heat storage material 60, the temperature rise of the adsorbent 50 can be suppressed with a simple configuration. As a result, it is possible to easily suppress the decrease in the adsorption capacity of the adsorbent 50.

[0029] When the adsorbent 50 has finished adsorbing the desired substance, the honeycomb adsorption member 10 is heated in a state where the flow of the mixed fluid is stopped to desorb the desired substance from the adsorbent 50, and then the honeycomb adsorption member 10 is cooled to return the heat storage material 60 to its original phase. Thereby, the adsorption by the adsorbent 50 and the heat storage by the heat storage material 60 can be repeated.

[0030] The total amount of the heat storage material 60 may be set so as to be able to store the total heat generation amount obtained from the total adsorption capacity of the adsorbent 50.

[0031] In addition, the number and arrangement of the first cells 41 and the second cells 42 may be appropriately set so that heat is efficiently transferred from the adsorbent 50 to the heat storage material 60.

[0032] 2. Second Embodiment FIG. 3 is a perspective view of the honeycomb adsorption member 110 according to the second embodiment. FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3.

[0033] The honeycomb adsorption member 110 is used to adsorb a desired substance contained in the mixed fluid. The honeycomb adsorption member 110 is a wall flow type honeycomb structure, and the cells into which the mixed fluid flows are open only at one end face of the honeycomb structure, and the cells into which the mixed fluid flows are open only at one end face of the honeycomb structure. The cells through which the residual fluid flows out after the desired substance is removed from the mixed fluid are open only at the other end face of the honeycomb structure.

[0034] The honeycomb adsorption member 110 is formed in a columnar shape. In the present embodiment, the honeycomb adsorption member 110 is formed in a square columnar shape, but it may be formed in a cylindrical shape, a triangular columnar shape, a polygon with five or more sides, or the like. The honeycomb adsorption member 110 has a first end face S11 and a second end face S12. The first end face S11 is provided on the opposite side of the second end face S12.

[0035] As shown in FIGS. 3 and 4, the honeycomb adsorption member 110 includes a partition wall 120, an outer wall 130, a plurality of cells 140, an adsorbent 150, and a heat storage material 160.

[0036] The partition wall 120 is formed in a lattice shape. The partition wall 120 can be composed of a porous material containing pores inside. Examples of such a porous material include cordierite, mullite, zirconium phosphate, aluminum titanate, silicon carbide, silicon-silicon carbide composite (e.g., Si-bonded SiC), cordierite-silicon carbide composite, zirconia, spinel, indialite, sapphirine, corundum, titania, silicon nitride, or a mixture thereof.

[0037] It is preferable that some of the pores in the partition wall 120 are filled with a heat conductive material. Thereby, heat can be efficiently conducted from the adsorbent 150 to the heat storage material 160 through some of the partition walls 120 filled with the heat conductive material. As the heat conductive material, silicon (Si), aluminum (Al), copper (Cu), lead (Pb), tin (Sn), zinc (Zn), indium (In), iron (Fe), and alloys containing at least one of these can be used. The heat conductive material can be filled into the pores by heating it to a temperature equal to or higher than its melting point.

[0038] Note that since it is difficult for the mixed fluid to flow through some of the partition walls 120 filled with the heat conductive material, the flow of the mixed fluid mainly occurs through the remaining partition walls not filled with the heat conductive material.

[0039] The outer wall 130 is formed in a cylindrical shape. The outer wall 130 surrounds the outside of the partition wall 120. The outer wall 130 may be integrally formed with the partition wall 120, or may be an outer peripheral coating layer formed by applying an outer peripheral coating material so as to surround the partition wall 120.

[0040] Each of the plurality of cells 140 is partitioned by the partition wall 120. In the present embodiment, the cross-sectional shape of each of the plurality of cells 140 is rectangular, but it may be a closed figure other than a rectangle composed of straight lines and curves, such as a circle, a triangle, a polygon with five or more sides, or a sector.

[0041] The plurality of cells 140 includes a first cell 141, a second cell 142, a third cell 143, and a fourth cell 144. The first to fourth cells 141 to 144 are different cells from each other. In FIG. 3, the first cell 141 is shown in white, the second cell 142 is shown by a broken-line circle, the third cell 143 is shown by a broken-line cross, and the fourth cell 144 is shown by a broken-line triangle.

[0042] As shown in FIG. 4, one end of the first cell 141 opens to the first end face S11, and the other end of the first cell 142 closes at the second end face S12. A mixed fluid containing a desired substance flows into the first cell 141 from one end of the first cell 141.

[0043] As shown in FIG. 4, one end of the second cell 142 is closed at the first end face S11, and the other end of the second cell 142 is closed at the second end face S12. Specifically, one end of the second cell 142 is sealed by the first sealing portion 170, and the other end of the second cell 142 is sealed by the second sealing portion 180.

[0044] An adsorbent 150 is disposed in the second cell 142. The adsorbent 150 may be filled in the entire second cell 142, or may be disposed in a part of the second cell 142.

[0045] The adsorbent 150 adsorbs the desired substance contained in the mixed fluid flowing from the first cell 141 to the second cell 142 through the porous partition wall 120. For example, when the mixed fluid is air and the desired substance is carbon dioxide (CO2), a solid amine-based material can be used as the adsorbent 150. However, the adsorbent 150 only needs to be capable of adsorbing the desired substance, and can be appropriately selected according to the composition of the desired substance.

[0046] The adsorbent 150 generates heat in the adsorption process of adsorbing the desired substance. When the temperature of the adsorbent 150 rises, the adsorption capacity of the adsorbent 150 tends to decrease.

[0047] As shown in FIG. 4, one end of the third cell 143 is closed at the first end face S11, and the other end of the third cell 143 is open at the second end face S12. In the third cell 143, the residual fluid after the desired substance is removed from the mixed fluid flows in from the second cell 142 through the porous partition wall 120, and the residual fluid flows out from the opening at the other end of the third cell 143.

[0048] As shown in FIG. 4, one end of the fourth cell 144 is closed at the first end face S11, and the other end of the fourth cell 144 is closed at the second end face S12. Specifically, one end of the fourth cell 144 is sealed by the first sealing portion 170, and the other end of the fourth cell 144 is sealed by the second sealing portion 180.

[0049] In the fourth cell 144, a heat storage material 160 is disposed. The heat storage material 160 is a material capable of storing heat by utilizing the latent heat during a phase change. The heat storage material 160 may be a material whose crystal phase changes according to temperature, or may be a material that changes between at least two phases among the three phases (solid phase, liquid phase, gas phase) according to temperature. Examples of the material whose crystal phase changes according to temperature include vanadium dioxide (VO2)-containing substances. Examples of the material that changes between three phases according to temperature include sodium sulfate decahydrate, paraffin, and the like. Since the heat storage material 160 maintains the temperature at which the phase change occurs until the phase change is completely finished, the temperature of the honeycomb adsorption member 10 can be maintained at the temperature at which the phase change occurs even during the adsorption process.

[0050] Heat generated by the adsorption process in the adsorbent 150 is transmitted to the heat storage material 160 through the partition wall 120, and the heat transmitted to the heat storage material 160 is stored in the heat storage material 160 by the phase change of the heat storage material 160. In this way, since the heat generated in the adsorbent 150 can be stored in the heat storage material 160, the temperature rise of the adsorbent 150 can be suppressed with a simple configuration. As a result, it is possible to easily suppress the decrease in the adsorption capacity of the adsorbent 150.

[0051] When the adsorbent 150 finishes adsorbing the desired substance, the desired substance is desorbed from the adsorbent 150 by heating the honeycomb adsorption member 110 with the flow of the mixed fluid stopped, and then the heat storage material 160 is returned to its original phase by cooling the honeycomb adsorption member 110. Thereby, the adsorption by the adsorbent 150 and the heat storage by the heat storage material 160 can be repeated.

[0052] Note that the total amount of the heat storage material 160 may be set so as to be able to store the total heat generation amount obtained from the total adsorption capacity of the adsorbent 150.

[0053] Also, the number and arrangement of each of the first to fourth cells 141 to 144 may be appropriately set so that the flow of the mixed fluid is not hindered and heat is efficiently transferred from the adsorbent 150 to the heat storage material 160.

[0054] 3. Third Embodiment FIG. 5 is a perspective view of the honeycomb adsorption member 210 according to the third embodiment. FIG. 6 is a cross-sectional view taken along the line C-C of FIG. 5.

[0055] The honeycomb adsorption member 210 is used to adsorb a desired substance contained in the mixed fluid. The honeycomb adsorption member 210 is a flow-through type honeycomb structure, and cells through which the mixed fluid flows are open at both end faces of the honeycomb structure.

[0056] The honeycomb adsorption member 210 is formed in a columnar shape. In the present embodiment, the honeycomb adsorption member 210 is formed in a quadrangular prism shape, but it may be formed in a cylindrical shape, a triangular prism shape, a polygonal prism shape with five or more sides, or the like. The honeycomb adsorption member 210 has a first end face S21 and a second end face S22. The first end face S21 is provided on the opposite side of the second end face S22.

[0057] As shown in FIGS. 5 and 6, the honeycomb adsorption member 210 includes a partition wall 220, an outer wall 230, a plurality of cells 240, and a heat storage material 260.

[0058] The partition wall 220 is formed in a lattice shape. The partition wall 220 is made of a porous material containing pores inside. Examples of such a porous material include cordierite, mullite, zirconium phosphate, aluminum titanate, silicon carbide, silicon-silicon carbide composite (e.g., Si-bonded SiC), cordierite-silicon carbide composite, zirconia, spinel, indialite, sapphirine, corundum, titania, silicon nitride, or a mixture thereof.

[0059] Inside the partition wall 220, an adsorbent (not shown) is disposed. The adsorbent can be mixed with the above-described porous material. The adsorbent adsorbs a desired substance contained in the mixed fluid. For example, when the mixed fluid is air and the desired substance is carbon dioxide (CO2), a solid amine-based material can be used as the adsorbent. However, the adsorbent only needs to be capable of adsorbing the desired substance and can be appropriately selected according to the composition of the desired substance. The adsorbent generates heat in the adsorption process of adsorbing the desired substance. When the temperature of the adsorbent rises, the adsorption capacity of the adsorbent tends to decrease.

[0060] Note that it is preferable that some pores of the partition wall 220 are filled with a heat conductive material. Thereby, heat can be efficiently conducted from the adsorbent to the heat storage material 260 through the partition wall 220. As the heat conductive material, silicon (Si), aluminum (Al), copper (Cu), lead (Pb), tin (Sn), zinc (Zn), indium (In), iron (Fe), and an alloy containing at least one of these can be used. The heat conductive material can be filled into the pores by heating it above its melting point.

[0061] The outer wall 230 is formed in a cylindrical shape. The outer wall 230 surrounds the outside of the partition wall 220. The outer wall 230 may be integrally formed with the partition wall 220 or may be an outer peripheral coat layer formed by applying an outer peripheral coating material so as to surround the partition wall 220.

[0062] Each of the plurality of cells 240 is partitioned by the partition wall 220. In the present embodiment, the cross-sectional shape of each of the plurality of cells 240 is rectangular, but it may be a closed figure other than a rectangle composed of straight lines and curves, such as a circle, a triangle, a polygon with five or more sides, or a sector.

[0063] The plurality of cells 240 includes a first cell 241 and a second cell 242. The first cell 241 is a cell different from the second cell 242.

[0064] As shown in FIG. 6, one end of the first cell 241 opens to the first end face S21, and the other end of the first cell 242 opens to the second end face S22. A mixed fluid containing a desired substance flows into the first cell 241 from one end of the first cell 241.

[0065] The mixed fluid flowing into the first cell 241 enters the pores of the partition wall 220. The desired substance contained in the mixed fluid that has entered the pores of the partition wall 220 is adsorbed by the adsorbent disposed inside the partition wall 220.

[0066] As shown in FIG. 6, one end of the second cell 242 is closed at the first end face S21, and the other end of the second cell 242 is closed at the second end face S22. Specifically, one end of the second cell 242 is sealed by the first sealing portion 270, and the other end of the second cell 242 is sealed by the second sealing portion 280.

[0067] A heat storage material 260 is disposed in the second cell 242. The heat storage material 260 is a material capable of storing heat by utilizing the latent heat during a phase change. The heat storage material 260 may be a material whose crystal phase changes according to temperature, or may be a material that changes between at least two phases (solid phase, liquid phase, gas phase) according to temperature. Examples of the material whose crystal phase changes according to temperature include vanadium dioxide (VO2) and inclusion substances. Examples of the material that changes between three phases according to temperature include sodium sulfate decahydrate, paraffin, and the like. Since the heat storage material 260 maintains the temperature at which the phase change occurs until the phase change is completely finished, the temperature of the honeycomb adsorption member 210 can be maintained at the temperature at which the phase change occurs even during the adsorption process.

[0068] The heat generated by the adsorption process in the above-described adsorbent is transmitted to the heat storage material 260 through the partition wall 220, and the heat transmitted to the heat storage material 260 is stored in the heat storage material 260 by the phase change of the heat storage material 260. In this way, since the heat generated in the adsorbent can be stored in the heat storage material 260, the temperature rise of the adsorbent can be suppressed with a simple configuration. As a result, it is possible to easily prevent the adsorption capacity of the adsorbent from decreasing.

[0069] When the adsorbent has finished adsorbing the desired substance, the honeycomb adsorption member 210 is heated with the flow of the mixed fluid stopped to desorb the desired substance from the adsorbent, and then the honeycomb adsorption member 210 is cooled to return the heat storage material 260 to its original phase. Thereby, adsorption by the adsorbent and heat storage by the heat storage material 260 can be repeated.

[0070] The total amount of the heat storage material 260 may be set so as to be able to store the total heat generation amount obtained from the total adsorption capacity of the adsorbent.

[0071] Also, the number and arrangement of the first cells 241 and the second cells 242 may be appropriately set so that heat is efficiently transferred from the adsorbent to the heat storage material 260.

Explanation of reference numerals

[0072] 10, 110, 210 honeycomb adsorption member 20, 120, 220 partition wall 30, 130, 230 outer wall 40, 140, 240 cell 50, 150 adsorbent 60, 160, 260 heat storage material

Claims

1. A plurality of cells partitioned by partition walls, An adsorbent capable of adsorbing a desired substance, A heat storage material disposed in some of the plurality of cells and capable of storing heat by utilizing the latent heat during a phase change, A honeycomb adsorbent member comprising the above.

2. The adsorbent is disposed on the inner surface of a cell different from the cell in which the heat storage material is disposed among the plurality of cells, The honeycomb adsorbent member according to claim 1.

3. The adsorbent is disposed in a cell different from the cell in which the heat storage material is disposed among the plurality of cells, The honeycomb adsorbent member according to claim 1.

4. The adsorbent is disposed inside the partition wall, The honeycomb adsorbent member according to claim 1.

5. The partition wall is made of a porous material containing pores inside, The pores included in a part of the partition wall are filled with a heat conduction material, The honeycomb adsorbent member according to any one of claims 1 to 4.

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