Gas separation membrane module and manufacturing method of the same

Abstract

To provide a gas separation membrane module which can maintain pressure resistance and heat resistance under an atmosphere of very high temperature / high pressure vapor and achieves excellent durability.SOLUTION: A gas separation membrane module 1 includes: a filter member 3 which separates a specific gas from a mixed gas; a housing 2 which houses the filter member 3; an inflow port 4 which is provided at the housing 2 and into which the mixed gas flows; and resin fixing members 8, 9 which fix the filter member 3 to the housing 2. The fixing member 8 has, at the inflow port 4 side, a packed bed 8a into which a filler 8f is mixed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a gas separation membrane module and a method for manufacturing a gas separation membrane module. [Background technology]

[0002] Gas separation using gas separation membranes is a resource- and energy-saving method that can be achieved using compact equipment, and its use is expanding and its importance is increasing in various fields, including petrochemicals, chemicals, precision machinery, food, automobiles, nuclear power, the environment, biotechnology, and medicine.Gas separation is performed by passing the mixed gas to be separated through a gas separation module equipped with a gas separation membrane.

[0003] Conventionally, a commonly known gas separation module is one in which a filter made of a plurality of bundled hollow fiber membranes is housed in a housing (see, for example, Patent Document 1). The gas separation module of Patent Document 1 is one in which a plurality of first hollow fiber membranes and second hollow fiber membranes are bundled and packed into a cylindrical case. The first hollow fiber membranes and second hollow fiber membranes are fixed at both ends of the case by potting sections made of a thermosetting resin so that only the hollow sections are open. A first opening and a second opening are provided on the side of the case. The housing is provided with a pair of first piping connections and a pair of second piping connections. The pair of first piping connections are parts that form flow paths leading to the hollow sections of the first hollow fiber membranes and the second hollow fiber membranes. The pair of second piping connections are parts that form flow paths leading to the outer wall surfaces of the first hollow fiber membranes and the second hollow fiber membranes via the first opening and second opening of the case.

[0004] In such a gas separation module, a first path is formed, which flows from one first piping connection, through the hollow portions of the first and second hollow fiber membranes, to the other first piping connection, and a second path is formed, which flows from one second piping connection, through a first opening in the case, past the outer wall surfaces of the first and second hollow fiber membranes, and to the other second piping connection, through a second opening in the case. By flowing a fluid to be dehumidified (e.g., water or a moist gas such as water vapor) through one of the first and second paths and a fluid to be humidified (e.g., a dry gas) through the other, moisture permeates from one path to the other due to the membrane separation action of the first and second hollow fiber membranes.

[0005] In addition, as a gas separation module, a fluid separation membrane module having two different types of potting parts has also been proposed as a method of improving the functionality of the potting part that fixes the separation membrane, such as heat resistance and pressure resistance, and the workability during production (see, for example, Patent Document 2). The gas separation module of Patent Document 2 describes that functionality and workability during production of separation membrane elements are ensured by laminating different types of potting resin compositions.

[0006] In recent years, gas separation technology using separation membranes has been attracting attention as part of the movement toward carbon neutrality. In many cases, it is expected that operating conditions will be more severe than those previously used, such as high-temperature, high-pressure steam (saturated steam) environments at temperatures of approximately 120°C to 200°C. For this reason, pressure resistance and heat resistance are required not only for the separation membranes but also for the components that make up the separation membrane modules, so that they can withstand these severe operating conditions. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-209418 [Patent Document 2] Japanese Patent Publication No. 2023-051811 Summary of the Invention [Problem to be solved by the invention]

[0008] However, the gas separation membrane module of Patent Document 1 has a problem that when used in a high-temperature, high-pressure steam environment, oxidation degradation and hydrolysis of the potting portion may occur, making it difficult to maintain pressure resistance. On the other hand, the gas separation membrane module of Patent Document 2 has a structure in which two different types of potting materials are laminated, and therefore when used in a high-temperature, high-pressure environment of about 120° C. to 200° C., it is used at or above the glass transition temperature of one or both of the materials, making it difficult to maintain pressure resistance. Furthermore, because the gas separation membrane module of Patent Document 2 has a structure in which two types of potting members are laminated, there is a risk of water collecting on the laminated surfaces, which could lead to peeling.

[0009] The present invention aims to solve the above-mentioned problems and to provide a gas separation membrane module that can maintain pressure resistance and heat resistance in an extremely high-temperature, high-pressure water vapor atmosphere and has excellent durability, and a method for manufacturing a gas separation membrane module. [Means for solving the problem]

[0010] In order to solve the above problems, the gas separation membrane module of the present invention includes a filter element that separates a specific gas from a mixed gas, a housing that accommodates the filter element, an inlet provided in the housing through which the mixed gas flows, and a resin fixing element that fixes the filter element to the housing. The fixing element has a packed layer containing a filler mixed therein on the inlet side.

[0011] In order to solve the above problem, the manufacturing method of the gas separation membrane module of the present invention is a manufacturing method of the gas separation membrane module described above, and is characterized by including a resin material injection process of injecting a predetermined amount of resin material mixed with the filler into a form for forming the fixing member, an impregnation process of impregnating the end of the filter member with the resin material injected into the form, a hardening process of hardening the resin material in a state where the filler has settled under its own weight to form the filling layer, and a fixing process of fixing the filter member to the housing via the fixing member formed by the hardening process. [Effects of the Invention]

[0012] The gas separation membrane module and the method for producing a gas separation membrane module according to the present invention can maintain pressure resistance and heat resistance in an atmosphere of extremely high-temperature, high-pressure steam, and are therefore excellent in durability. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a partial cross-sectional side view showing a gas separation membrane module according to a first embodiment. [Figure 2] FIG. 2 is an enlarged cross-sectional view taken along line II-II in FIG. [Figure 3A] FIG. 2 is an explanatory diagram showing a resin material injection step in the method for manufacturing a gas separation membrane module. [Figure 3B] FIG. 2 is an explanatory diagram showing an impregnation step in a method for producing a gas separation membrane module. [Figure 3C] FIG. 2 is an explanatory diagram showing a curing step in the method for producing a gas separation membrane module. [Figure 3D] FIG. 2 is an explanatory diagram showing a demolding step in the method for producing a gas separation membrane module. [Figure 4] FIG. 4 is a partial cross-sectional side view showing a gas separation membrane module according to a second embodiment. [Figure 5] 5 is an enlarged cross-sectional view taken along line VV in FIG. 4. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the embodiments, the same parts are designated by the same reference numerals, and redundant description will be omitted.

[0015] (First embodiment) FIG. 1 is a partial cross-sectional side view showing a gas separation membrane module according to a first embodiment, and FIG. 2 is an enlarged cross-sectional view taken along line II-II in FIG. 1. The gas separation membrane module 1 shown in FIG. 1 is supplied with a mixed gas containing two or more gases and separates a specific gas contained in the mixed gas from other gases. The mixed gas supplied to the gas separation membrane module 1 is assumed to be a high-temperature gas of approximately 120 to 200°C, and contains, for example, high-temperature water vapor (saturated water vapor) in the range of 120 to 200°C. In the following, the gas separation membrane module 1 is illustrated as using a hollow fiber membrane 3 (gas separation membrane) as a filter member, but the type of gas separation membrane is not limited thereto, and various gas separation membranes can be used as long as they are capable of separating a specific gas contained in a mixed gas from other gases.

[0016] As shown in FIG. 1, a gas separation membrane module 1 includes a housing 2, hollow fiber membranes 3 housed in the housing 2, and resin fixing members 8 and 9 that fix the hollow fiber membranes 3 to the housing. The housing 2 is a cylindrical (cylindrical) sealed container. The housing 2 is not limited to being cylindrical, and various shapes can be used. The housing 2 is provided with an inlet 4 for the mixed gas, an outlet 5 for the permeated gas, and an outlet 6 for the non-permeated gas. Gas that has permeated the hollow fiber membranes 3 flows out from the outlet 5. On the other hand, gas that has not permeated the hollow fiber membranes 3 flows out from the outlet 6.

[0017] A plurality of hollow fiber membranes 3 are bundled together to form a fiber bundle element 7. The hollow fiber membrane 3 is not particularly limited, and may be made of any material suitable for the substance to be separated and the separation conditions. The hollow fiber membrane 3 may be made of, for example, an elastomer material or a glassy polymer material such as polyamide, polysulfone, polyimide, polyetherimide, polyamideimide, polyetheretherketone, polyphenylene sulfide, polyarylate, or polycarbonate, or may further be made of a ceramic material such as zeolite, a carbon material, a rigid polymer material such as cardo polyimide, or a composite material containing any of the above materials.

[0018] 1 , both ends of the yarn bundle element 7 are fixed by fixing members 8 and 9, and the yarn bundle element 7 is fixed within the housing 2 via the fixing members 8 and 9. The fixing member 8 on the inlet 4 side fixes the end of the yarn bundle element 7 on the inlet 4 side to maintain the shape of the yarn bundle element 7, and functions as a partition that seals and separates the area on the inlet 4 side within the housing 2 from the area that leads to the outlet 5 for the permeating gas within the housing 2. On the other hand, the fixing member 9 on the outlet 6 side fixes the end of the yarn bundle element 7 on the outlet 6 side to maintain the shape of the yarn bundle element 7, and functions as a partition that seals and separates the area on the outlet 6 side within the housing 2 from the area that leads to the outlet 5 for the permeating gas within the housing 2.

[0019] The fixing members 8 and 9 may be made of a thermosetting resin such as an elastomer resin, an acrylate resin, an epoxy resin, a phenolic resin, a urea resin, a melamine resin, a silicone resin, or a bismaleimide resin. A curing agent, a curing accelerator, a catalyst, or the like may be added to solidify the thermosetting resin. The fixing member 8 on the inlet 4 side and the fixing member 9 on the outlet 6 side may be made of the same resin or different resins. If different resins are used, it is preferable to use a resin material that is more suitable for a high-temperature, high-pressure environment for the fixing member 8 on the inlet 4 side.

[0020] The fixing member 8 on the inlet 4 side has a filling layer 8a mixed with a filler 8f and a resin layer 8b without any filler 8f mixed in. The filling layer 8a and the resin layer 8b are integrally formed. The filling layer 8a is disposed on the inlet 4 side, and the resin layer 8b is disposed on the opposite side from the inlet 4 (the area leading to the outlet 5 for the permeating gas inside the housing 2).

[0021] The filler 8f is a filler made of a scaly inorganic material. Here, "scaly" refers to a scaly shape, having a substantially thin plate-like form including both the longitudinal and lateral directions, as shown in FIG. 2. Examples of the filler 8f include mica, silica, boron nitride, silicon carbide, and finely powdered talc. The filler 8f may contain one type of filler per the filling layer 8a, or two or more types of filler per the filling layer 8a. A dispersant and / or a coupling agent may be added to the filling layer 8a for the purpose of adjusting the viscosity of the varnish while improving the uniform dispersion of the filler 8f in the filling layer 8a.

[0022] 2, the filler 8f is arranged so that its longitudinal direction intersects with the flow direction of the mixed gas (the direction from the inlet 4 toward the outlet 6, see FIG. 1). By arranging the filler 8f in this manner, the area of ​​the filler 8f facing the direction in which the pressure of the mixed gas acts is increased, ensuring pressure resistance. For example, even if the surface of the fixing member 8 (filled layer 8a) on the inlet 4 side (see FIG. 1, the same applies below) is exposed to saturated water vapor for a long period of time, the intrusion of water can be prevented by arranging the filler 8f so that its longitudinal direction intersects with the flow direction of the mixed gas, and the progress of deterioration of the member due to hydrolysis can be effectively prevented.

[0023] The longitudinal size of the filler 8f (filler) is preferably 1 μm or more and 20 μm or less, more preferably 2 μm or more and 10 μm or less. If the longitudinal size of the filler 8f is less than 1 μm, the particles are too small and tend to aggregate, making it difficult to uniformly disperse them in the varnish. On the other hand, if the longitudinal size of the filler 8f exceeds 20 μm, the particles are too large, which may reduce the strength of the fixing member and cause breakage.

[0024] The content of the filler 8f is not particularly limited, but if it is too small, the pressure resistance will not be exhibited, so the content of the filler 8f in the fixing member 8 is set to a sufficient amount that can reliably improve heat resistance and pressure resistance.

[0025] Thus, the filling layer 8a (fixing member 8) mixed with the filler 8f has high resistance to deformation stress in an extremely high temperature and pressure environment, and has mechanical strength that makes it difficult to deform or damage.

[0026] The thickness of the packed layer 8a is set to a range of 70% or less from the inlet 4 side with respect to the thickness of the fixing member 8 (thickness in the direction of flow of the mixed gas). In other words, the packed layer 8a of the fixing member 8 is not set to be thicker than necessary, and the fixing member 8 is provided with resin layers 8b on the side facing the inlet 4 and on the opposite side. The resin layers 8b are not filled with filler 8f, and therefore are more flexible than the packed layer 8a. When the hollow fiber membranes 3 are deformed by the application of a deformation stress during the flow of the mixed gas, the resin layers 8b function as a region through which deformation propagates, and play a role in suppressing the generation of concentrated stress on the hollow fiber membranes 3.

[0027] Next, a method for manufacturing the gas separation membrane module 1 will be described with reference to Figures 3A to 3D. Figures 3A to 3D are explanatory views showing the manufacturing process. The method for manufacturing the gas separation membrane module 1 includes a resin material injection step, an impregnation step, a curing step, and a fixing step.

[0028] The resin material injection process is a process of injecting a predetermined amount of resin material 10 mixed with filler 8f into a mold 20 for forming a fixing member, as shown in Fig. 3A. The impregnation process is a process of impregnating one end of the yarn bundle element 7 with the resin material 10 poured into the mold 20, as shown in Fig. 3B. The curing process is a process of curing the resin material 10 in a state where the filler 8f has settled due to its own weight to form a filling layer 8a. The fixing process is a process of fixing the yarn bundle element 7 to the housing 2 via fixing members 8 and 9 formed in the curing process.

[0029] In the resin material injection step, a mixture of resin material 10 and a predetermined amount of filler 8f may be injected into form 20, or filler 8f may be mixed in after resin material 10 is injected into form 20. In either case, filler 8f is mixed into resin material 10 by stirring.

[0030] In the impregnation step, it is preferable to inject the resin material 10 into the mold 20, and then quickly impregnate the ends of the yarn bundle elements 7 into the resin material 10. Furthermore, if the filler 8f is mixed after the resin material 10 is injected into the mold 20, it is preferable to quickly impregnate the ends of the yarn bundle elements 7 into the resin material 10 after stirring. After the end of the yarn bundle element 7 is impregnated with the resin material 10, the filler 8f mixed in the resin material 10 settles down due to its own weight. At this time, the filler 8f is subjected to a resistance force due to the viscosity of the resin material 10 during the settling process, and assumes a posture where the resistance is minimized, that is, a posture where the longitudinal direction of the filler 8f intersects with the flow direction of the mixed gas (a stable posture where the filler 8f is approximately parallel to the bottom surface of the mold 20) (see FIG. 2).

[0031] In the curing step, heat is applied to the mold 20 in a state in which the filler 8f has settled in an area of ​​70% or less from the inlet 4 side with respect to the thickness of the fixing member 8. As a result, as shown in Fig. 3C, a fixing member 8 having a filling layer 8a in an area of ​​70% or less from the inlet 4 side (see Fig. 1) with respect to the thickness of the fixing member 8 is formed at one end of the yarn bundle element 7. The time it takes for the filler 8f to settle to a range of 70% or less from the inlet 4 side may be determined in advance by testing or the like, and the timing for applying heat to the form 20 may be determined based on that time. After the curing step, as shown in FIG. 3D, the fiber bundle element 7 and fixing member 8 are removed from the mold 20, and the lower end of the fixing member 8 is cut off to expose the hollow portion of each hollow fiber membrane 3.

[0032] Thereafter, a fixing member 9 is formed on the other end of the yarn bundle element 7. In forming the fixing member 9, a known method can be used in which the other end of the yarn bundle element 7 is impregnated with a resin material 10 that does not contain the filler 8f, and the resin material 10 is hardened by applying heat.

[0033] In the fixing step, the fiber bundle element 7 is properly fixed to a predetermined mounting position on the inner surface of the housing 2 (see FIG. 1) via a sealing material such as a gasket or O-ring (not shown). This completes the production of the gas separation membrane module 1 in which the fiber bundle element 7 is fixed inside the housing 2 by the fixing members 8 and 9.

[0034] According to the gas separation membrane module 1 and the manufacturing method thereof of this embodiment described above, the module is provided with a fixing member 8 having a packed layer 8a mixed with packing material 8f on the inlet 4 side, and therefore is able to maintain pressure resistance and heat resistance in an extremely high-temperature, high-pressure water vapor atmosphere, and is therefore excellent in durability.

[0035] The gas separation membrane module 1 and its manufacturing method of this embodiment are suitable for cases where water vapor and gases with molecular sizes smaller than water vapor are allowed to permeate from a mixed gas, but gases with molecular sizes larger than water vapor are not allowed to permeate. Specifically, under high temperature and high pressure conditions, the size of water vapor (dynamic molecular diameter of water vapor is 0.3 nm or less, 10 -9It can permeate gases smaller than 1 meter (m). Here, water vapor has a kinetic molecular diameter similar to that of hydrogen, which is 0.265 nm (2.65 Å). The kinetic molecular diameter of hydrogen is 0.289 nm (2.89 Å). The kinetic molecular diameter of helium is 0.26 nm (2.6 Å). Methane, carbon monoxide, and carbon dioxide are considered to be relatively large gas molecules, being roughly the same size as nitrogen. Specifically, the kinetic molecular diameters are 0.36 nm (3.6 Å) for nitrogen, 0.38 nm (3.8 Å) for methane, 0.376 nm (3.76 Å) for carbon monoxide, and 0.33 nm (3.3 Å) for carbon dioxide. Therefore, the gas separation membrane module 1 according to this embodiment allows water vapor, hydrogen, and helium to permeate, but does not allow nitrogen, methane, carbon monoxide, carbon dioxide, or other gases with a kinetic molecular diameter exceeding 0.3 nm to permeate.

[0036] Furthermore, since the filler 8f is a scaly inorganic material, the filler 8f functions as a reinforcing member, improving the tensile strength, compressive strength, and hardness of the fixing member 8 (filler layer 8a), as well as the heat resistance, heat distortion temperature, and thermal stability. Therefore, the pressure resistance and heat resistance can be maintained even in an extremely high-temperature, high-pressure steam atmosphere, and excellent durability can be achieved.

[0037] Furthermore, since the longitudinal direction of the filler 8f is arranged to intersect with the flow direction of the mixed gas, the area of ​​the filler 8f facing the direction in which the pressure of the mixed gas acts is widened, ensuring pressure resistance. Also, by arranging the filler in this way, it is possible to prevent water from entering and to effectively prevent the progression of deterioration of the components due to hydrolysis.

[0038] The thickness of the packed layer 8a is set to a range of 70% or less from the inlet 4 side of the thickness of the fixing member 8. This makes it possible to maintain pressure resistance and heat resistance in an atmosphere of extremely high-temperature, high-pressure steam, while ensuring a resin layer 8b in a portion of the fixing member 8 opposite the inlet 4. This allows the resin layer 8b to function as a portion to which deformation propagates when the hollow fiber membranes 3 are deformed by the application of deformation stress, thereby suppressing the occurrence of concentrated stress on the hollow fiber membranes 3.

[0039] (Second embodiment) Next, a gas separation membrane module according to a second embodiment will be described with reference to Figures 4 and 5. Figure 4 is a partially cross-sectional side view showing a gas separation membrane module according to the second embodiment, and Figure 5 is an enlarged cross-sectional view taken along line VV in Figure 4. This embodiment differs from the first embodiment in that two types of fillers 8f1 and 8f2 (fillers) with different longitudinal sizes are used. In this embodiment as well, the thickness of the packed layer 8a is set to a range of 70% or less from the inlet 4 side with respect to the thickness of the fixing member 8 (thickness in the direction of flow of the mixed gas).

[0040] 4, the housing 2 of the gas separation membrane module 1A of this embodiment is provided with permeable gas outlets 5 at two circumferential locations. Note that, as in the first embodiment, one permeable gas outlet 5 may be provided.

[0041] As shown in Fig. 5, the filler 8f1 is a filler having a longitudinal size substantially the same as that of the filler 8f of the first embodiment (see Fig. 2). The filler 8f1 is disposed in the fiber bundle element 7 mainly in the region R1 where the hollow fiber membranes 3 are densely packed. On the other hand, the filler 8f2 is a filler having a longitudinal size larger than that of the filler 8f1. The filler 8f2 is disposed in a region radially outside the region R1 where the hollow fiber membranes 3 are densely packed, that is, in a region R2 near the housing 2 where no hollow fiber membranes 3 are present.

[0042] In this embodiment as well, the size of the fillers 8f1 and 8f2 in the longitudinal direction is preferably 1 μm or more and 20 μm or less, and more preferably 2 μm or more and 10 μm or less.

[0043] Next, a manufacturing method for the gas separation membrane module 1A will be described. The manufacturing method for the gas separation membrane module 1A includes a first step of forming a region R1 where the hollow fiber membranes 3 are densely packed, a second step of forming a region R2 where no hollow fiber membranes 3 are present, and a fixing step similar to that of the first embodiment. The first step includes a resin material injection step, an impregnation step, and a curing step similar to those of the first embodiment. The second step also includes a resin material injection step, an impregnation step, and a curing step similar to those of the first embodiment. Since each step is similar to that of the first embodiment, they will be briefly described below with appropriate reference to Figures 3A to 3D.

[0044] In the first step, a mold (not shown) having a size corresponding to the outer shape of region R1 is used, and a small-diameter fixing member corresponding to region R1 is formed through a resin material injection step, an impregnation step, and a curing step. The small-diameter fixing member includes a filling layer 8a filled with filler 8f1 and a resin layer 8b.

[0045] In the second step, a form 20 (see FIG. 3A) having a size corresponding to the outer shape of region R2 is used. Then, in the second step, the form 20 into which resin material 10 has been poured is impregnated with the small-diameter fixing member formed in the first step, and region R2 is formed radially outside region R1, including a filling layer 8a filled with filler 8f2 and a resin layer 8b. That is, in this embodiment, regions R1 and R2 are formed in stages to form the fixing member 8. Then, by fixing the fixing member 8 to the inner surface of the housing 2 in a fixing step, the gas separation membrane module 1A is manufactured.

[0046] The gas separation membrane module 1A and its manufacturing method of the present embodiment provide the following advantages in addition to those of the first embodiment. Specifically, in the region R1 where the hollow fiber membranes 3 are densely packed, the filler 8f1 having a small longitudinal size is used, so the filler 8f1 is easily arranged (impregnated) between the hollow fiber membranes 3, achieving a uniform arrangement of the filler 8f1. Furthermore, the frequency of contact between the hollow fiber membranes 3 and the filler 8f1 in the region R1 can be reduced. On the other hand, in the region R2 where no hollow fiber membranes 3 are present, the filler 8f2 having a large longitudinal size is used. This reliably prevents damage to the hollow fiber membranes 3 due to contact with the filler 8f2, thereby improving the strength of the packed layer 8a and, ultimately, the strength of the fixing member 8.

[0047] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and each component can be appropriately modified within the scope of the invention. For example, the thickness of the packed layer 8a may be in the range of 70% or less from the inlet 4 side of the thickness of the fixing member 8 (thickness in the direction of flow of the mixed gas), and can be set in the range of 50% to 70%, or in the range of 20% to 50% depending on the temperature of the mixed gas, etc.

[0048] Furthermore, in the second embodiment described above, the thickness of the filling layer 8a in regions R1 and R2 is set to be the same, but this is not limited to this, and the thickness of the filling layer 8a in regions R1 and R2 may be set to be different from each other. [Explanation of symbols]

[0049] 1. 1A Gas separation membrane module 2. Housing 3. Hollow fiber membrane (filter component) 4 Inlet 8, 9 Fixing members 8a Filled bed 8f filler 8f1, 8f2 fillers

Claims

1. a filter member for separating a specific gas from a gas mixture; a housing that accommodates the filter member; an inlet provided in the housing through which the mixed gas flows; a fixing member made of resin that fixes the filter member to the housing, A gas separation membrane module, wherein the fixing member has a packed layer containing a packing material on the inlet side.

2. 2. The gas separation membrane module according to claim 1, wherein the filler is a scale-like inorganic material.

3. 3. The gas separation membrane module according to claim 2, wherein the filler has a longitudinal direction and a lateral direction, and is arranged so that the longitudinal direction intersects with the flow direction of the mixed gas.

4. 2. The gas separation membrane module according to claim 1, wherein the thickness of the packed layer is set to a range of 70% or less from the inlet side of the thickness of the fixing member.

5. A method for producing the gas separation membrane module according to claim 1, a resin material injection step of injecting a predetermined amount of the resin material mixed with the filler into the mold for forming the fixing member; an impregnation step of impregnating an end portion of the filter member with the resin material injected into the mold; a curing step of curing the resin material in a state in which the filler has settled due to its own weight to form the filling layer; a fixing step of fixing the filter member to the housing via the fixing member formed in the hardening step.

6. The method for manufacturing a gas separation membrane module according to claim 5, characterized in that the hardening process hardens the resin material when the filler settles due to its own weight to a range of 70% or less from the inlet side relative to the thickness of the fixing member.

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