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WO2019116075A1 - Procédé et système de revêtement d'une membrane à fibres creuses - Google Patents

Procédé et système de revêtement d'une membrane à fibres creuses Download PDF

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Publication number
WO2019116075A1
WO2019116075A1 PCT/IB2017/057795 IB2017057795W WO2019116075A1 WO 2019116075 A1 WO2019116075 A1 WO 2019116075A1 IB 2017057795 W IB2017057795 W IB 2017057795W WO 2019116075 A1 WO2019116075 A1 WO 2019116075A1
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WIPO (PCT)
Prior art keywords
hollow fiber
coating
coating solution
fiber membranes
coating layer
Prior art date
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Ceased
Application number
PCT/IB2017/057795
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English (en)
Inventor
Ali POORKHALIL
Hasan FARROKHZAD
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Individual
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Individual
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Filing date
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Priority to PCT/IB2017/057795 priority Critical patent/WO2019116075A1/fr
Publication of WO2019116075A1 publication Critical patent/WO2019116075A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0081—After-treatment of organic or inorganic membranes
    • B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/24—Dialysis ; Membrane extraction
    • B01D61/28—Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/12—Composite membranes; Ultra-thin membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/66—Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only
    • B01D71/68—Polysulfones; Polyethersulfones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/70—Polymers having silicon in the main chain, with or without sulfur, nitrogen, oxygen or carbon only
    • B01D71/701—Polydimethylsiloxane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/15—Use of additives
    • B01D2323/218—Additive materials
    • B01D2323/2182—Organic additives

Definitions

  • the present disclosure generally relates to methods and systems for continuous coating membrane contactors, and particularly, to a method and system for uniformly hydrophobic coating a bundle of hollow fiber membranes.
  • Membrane contactors have been proposed for a long time in order to achieve more efficient separation operations, in place of classical processes based on direct contact between two fluid phases, such as gas-liquid absorption, for example, removal of C0 2 , H 2 S, or other compounds from gases streams like as natural gas, exhaust gases, etc.
  • a membrane contactor usually consists of a bundle of hollow fibers placed in a membrane module where the fluids flow on each side of the hollow fibers without any direct contact. Additional specifications of membrane contactors can also be proposed such as improved hydrodynamic distribution effects, minimal liquid losses and ease of scale-up.
  • the membrane contactors are made from a hydrophobic material such as polyvinylidene fluoride (PVDF) and polytetrafluoroethylene (PTFE), or the absorber side of a respective membrane contactor may be coated with hydrophobic polymers such that the absorption liquid cannot get in direct contact with the absorber side.
  • PVDF polyvinylidene fluoride
  • PTFE polytetrafluoroethylene
  • FIG. 1 illustrates a method for coating hollow fiber membranes, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 2A illustrates a schematic view of an exemplary implementation of a continuous circulating circuit for coating hollow fiber membranes, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 2B illustrates a schematic cross sectional view of an exemplary hollow fiber membrane among the plurality of hollow fiber membranes within an exemplary membrane contactor module, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 2C illustrates a schematic cross sectional view of an exemplary hollow fiber membrane which is coated by a coating layer, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 3A illustrates a sectional view of an exemplary hollow fiber membrane of the plurality of hollow fiber membranes, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 3B illustrates a sectional view of an exemplary wetted hollow fiber membrane, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 3C illustrates a sectional view of an exemplary wetted hollow fiber membrane coated with a coating layer, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 3D illustrates a sectional view of an exemplary dried hollow fiber membrane coated with a uniform coating layer, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 4 illustrates an exemplary implementation of the intrusion of the coating solution through the coating layer, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 5A illustrates a SEM image of an exemplary polyethersulfone hollow fiber membrane coated with a PDMS coating layer on the inside surface and a PDMS coating layer on the outside surface of the hollow fiber membrane, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 5B illustrates a SEM image of a cross section of an exemplary polyethersulfone hollow fiber membrane coated with a uniform and defect-free PDMS layer, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 6 illustrates an exemplary implementation of a system for extracting C0 2 from air, consistent with one or more exemplary embodiments of the present disclosure.
  • Membrane contactor systems for capturing and/or separating polar gases such as C0 2 and H 2 S are desirable in a variety of applications.
  • Exemplary gas-liquid contacting applications include carbon dioxide separation, natural gas sweetening, and the like.
  • CO2 Carbon dioxide
  • a typical application is the treatment of an exhaust medium flow of a coal power plant.
  • H2S Hydrogen sulfide
  • said natural gas can contain severe amounts of either CO2 and/or H2S. The extraction of such gases is advantageous for several reasons.
  • a material which represents a real barrier to the liquid phase can be coated onto the absorber side of each hollow fiber membrane of the membrane contactor, where the hollow fibers can be made from non-expensive hydrophilic or lower hydrophobic materials.
  • the hollow fiber membrane contactors In order to prevent wetting of the pores, it is essential for the hollow fiber membrane contactors that at least one side, possibly even both sides, of a respective membrane contactor is equipped with a coating which prevents direct contact of the absorption liquid with the gaseous medium flow in gas-liquid applications.
  • the coating may be applied at least to the absorber side of the membrane contactor in order to prevent a direct contact of the absorption liquid with the absorber side and, most importantly, the pores of the membrane contactor.
  • the coating consists of a plurality of layers, which are considered in radial direction relative to the membrane contactor, that are situated directly on top of each other.
  • the coating may be made from reactive or non-reactive agents, depending on the properties needed and the way of applying the coating to the membrane contactor.
  • a method and system are described for an in-situ (in module) uniform and homogenous surface modification onto at least the absorber side of a bundle of hollow fibers that are placed within a membrane contactor module.
  • the membrane contactor module may include a plurality of about 10000 or more hollow fibers.
  • the surface modification includes coating of a uniform hydrophobic layer onto inside and/or outside of a bundle of conventional non-expensive hydrophilic or low- hydrophobic hollow fibers while hollow fibers are placed within a membrane contactor module.
  • the produced coated hollow fiber membrane contactors herein may have many advantages.
  • hydrophilic materials such as polysulfones (polysulfone or polyethersulfone) or polyamides that may be used here as the substrate material of the hollow fibers are commercially available and much cheaper than the materials used in the prior art, thereby making a membrane contactor apparatus using the present coated hollow fibers much cheaper than a conventional one.
  • the use of hydrophilic materials has not been considered until now because of the above described wetting problem of the pores by absorber liquid.
  • a method for coating hollow fiber membranes is disclosed.
  • the method may be used for simultaneously coating a uniform hydrophobic polymer layer on at least one of the inside or outside surfaces of a bundle of hollow fiber membranes that are made from a non-expensive material and placed in a membrane module.
  • FIG. 1 shows a method 100 for coating hollow fiber membranes.
  • the method 100 may include firstly, preparing a continuous circulating circuit (step 101), which may include an exemplary continuous circulating circuit 200 that is shown in FIG. 2A.
  • FIG. 2A shows a schematic view of an exemplary implementation of the continuous circulating circuit 200 for coating hollow fiber membranes, consistent with one or more exemplary embodiments of the present disclosure.
  • the continuous circulating circuit 200 may include a membrane contactor module 202, at least two liquid reservoirs 208 and 210, at least two pipeline paths 212 and 214, and at least one injector 216.
  • the membrane contactor module 202 may include a plurality of hollow fiber membranes 204, where each hollow fiber membrane 240 may include an inside area and an outside area; and a housing 206.
  • the plurality of hollow fiber membranes 204 may be extended inside the housing 206.
  • the liquid reservoirs 208 and 210 may contain a solvent and the injector 216 may contain a coating solution.
  • the membrane contactor module 202 and the liquid reservoirs 208 and 210 may be connected through the pipeline paths 212 and 214 and the injector 216 may have an access to the membrane contactor module 202 via one of the pipeline paths 212 and 214.
  • the housing 206 may be impermeable to liquids and may be configured to allow the plurality of hollow fiber membranes 204 to extend therein.
  • FIG. 2B shows a schematic cross sectional view of an exemplary membrane contactor module 202 representing a cross sectional view of an exemplary hollow fiber membrane 240 of the plurality of hollow fiber membranes 204, consistent with one or more exemplary embodiments of the present disclosure.
  • the hollow fiber membrane 240 may include an inside area 242 and an outside area 244.
  • the hollow fiber membrane 240 may be made from a porous polymeric material, which may include a hydrophilic polymer or a polymer with low- hydrophobicity, or combinations thereof.
  • the hollow fiber membrane 240 may be made from a polysulfone, a polyethersulfone, a polyamide, polypropylene (PP), or combinations thereof.
  • the continuous circulating circuit 200 may further include at least two circulation pumps 218 and 220 that may be configured to supply a liquid, for example, a solvent or a coating solution from the liquid reservoirs 208 and 210 to the membrane contactor module 202 and discharge the liquid therefrom.
  • the continuous circulating circuit 200 may further include at least two valves 222 and 224 that may be connected to the liquid reservoirs 208 and 210 and may be configured to control the flow of a liquid from the liquid reservoirs 208 and 210 and through the pipeline paths 212 and 214.
  • each of the liquid reservoirs 208 and 210 may be connected to a respective drain valve 226 and 228 for discharging a liquid from the liquid reservoirs 208 and 210.
  • each of the pipeline paths 212 and 214 may include a flow meter instrument 230 that may be used for monitoring the flow rate of a liquid through the pipeline paths 212 and 214.
  • each of the pipeline paths 212 and 214 may further include a degassing pass 232 that may be configured to remove undesirable gases from the pipeline paths 212 and 214.
  • the method 100 may further include circulating the solvent through the continuous circulating circuit 200 to wet the plurality of hollow fiber membranes 204 with the solvent (step 102), filling up at least one of the two liquid reservoirs 208 and 210 with a coating solution (step 103), circulating the coating solution through the continuous circulating circuit 200 to form a coating layer on a surface of at least one of the inside area 242, or the outside area 244 of the plurality of wetted hollow fiber membranes 204 (step 104), and injecting the coating solution via the injector 216 for intrusion of the coating solution through the coating layer to form a uniform coating layer (step 105).
  • the method 100 may further include draining the solvent and the coating solution from the membrane contactor module 202 (step 106), and drying the membrane contactor module 202 to form a plurality of dried hollow fiber membranes with a uniform coating layer (step 107).
  • the solvent may be circulated through the continuous circulating circuit 200 to fill up the inside area 242 and the outside area 244 of the plurality of hollow fiber membranes 204 with the solvent in order to wet the plurality of hollow fiber membranes 204 with the solvent and forming a plurality of wetted hollow fiber membranes 204.
  • the solvent may include a wetting agent that may be suited for interacting with pores of the plurality of hollow fiber membranes 204, which may result to an effect that a penetration of the coating solution inside the pores may be prevented during circulating the coating solution through the continuous circulating circuit 200 in step 104.
  • the wetting agent may be immiscible with the coating solution.
  • the wetting agent may include, for example, water.
  • the wetting agent may be applied to be placed in contact with the plurality of hollow fiber membranes 204 in step 102 before the coating solution may be fed to the membrane contactor module 202 in step 104. Further, it may be possible that the coating solution displace the wetting agent over time from the pores of the plurality of hollow fiber membranes 204 and then penetrating into the pores afterwards. In order to prevent this, it might be beneficial to build up a certain pressure in the wetting agent such that it may be able to withstand any pressure from the coating solution.
  • An exemplary implementation of wetting the pores of the plurality of hollow fiber membranes 204 is shown in FIGS. 3A and 3B.
  • FIG. 3A shows a sectional view of an exemplary hollow fiber membrane 240 of the plurality of hollow fiber membranes 204, consistent with one or more exemplary embodiments of the present disclosure.
  • the hollow fiber membrane 240 may include pores 300 as shown in this figure.
  • the method 100 as shown may include the step 102 of wetting the pores 300 previous to apply the coating solution to the hollow fiber membrane 240.
  • the solvent, including the wetting agent may be circulated through the continuous circulating circuit 200 and distributed to the plurality of hollow fiber membranes 204.
  • the solvent may be pumped by the circulation pumps 218 and 220 from the liquid reservoirs 208 and 210 to the membrane contactor module 202 and eventually back to the liquid reservoirs 208 and 210.
  • FIG. 3B shows a sectional view of an exemplary wetted hollow fiber membrane 240, consistent with one or more exemplary embodiments of the present disclosure.
  • the wetting agent 302 may penetrate into the pores 300 of the hollow fiber membrane 240 from the inside area 242 or the outside area 244 of the hollow fiber membrane 240. After wetting the pores 300, the wetting agent 302 may block the pores 302 and thereby may prevent their penetration by the coating solution.
  • the the two liquid reservoirs 208 and 210 may be filled up with a coating solution, for example, the solvent of at least one of the two liquid reservoirs 208 and 210 may be replaced with a coating solution.
  • one or both liquid reservoirs 208 and 210 may be discharged from the solvent and filled by the coating solution according to the purpose of that a surface of the inside area 242 or the outside area 244 of the plurality of hollow fiber membranes 204 to be coated.
  • a“coating solution” may refer to a liquid containing a coating agent that may include a sort of barriers that may prevent an absorber fluid from penetrating the pores of a membrane contactor including a hollow fiber membrane. The pores should remain free of the absorption fluid such that a gas that to be extracted in a gas-liquid application can diffuse through the pores more efficiently.
  • the coating solution may include a hydrophobic polymeric material that may include a siloxane-based hydrophobic polymer, polydimethylsiloxane (PDMS), a polyaniline (PANI), polyvinylidene difluoride (PVDF), or combinations thereof.
  • These materials may be both very easy to obtain and effective in terms of preventing the absorber liquid from getting into contact with the hollow fiber membrane 240, filling porous structure of the hollow fiber membrane 240, or penetrating into the other side of the hollow fiber membrane 240 when the hollow fiber membrane 240 is used as a membrane contactor.
  • the coating solution may be circulated through the continuous circulating circuit 200 to form a coating layer on a surface of at least one of the inside area 242, or the outside area 244 of the plurality of wetted hollow fiber membranes 204 obtained from step 102.
  • the coating solution may be pumped from at least one of the two liquid reservoirs 208 and 210 that may be filled up with the coating solution in step 103 by means of the associated circulation pump 218 and/or 220 and through the respective pipeline paths 212 and 214.
  • the coating solution may be circulated in the continuous circulating circuit 200 such that the coating solution may be continuously guided alongside the plurality of wetted hollow fiber membranes 204.
  • the coating solution may be guided alongside the wetted hollow fiber membranes 204 and then circulated back to the liquid reservoir 208 and/or 210. Therefore, a coating layer may be formed on a surface of at least one of the inside area 242, or the outside area 244 of the plurality of wetted hollow fiber membranes 204.
  • FIG. 2C shows a schematic cross sectional view of an exemplary wetted hollow fiber membrane 240 which is coated by a coating layer 250 using the exemplary method 100.
  • the coating layer 250 may be formed on an inside surface 246 and/or an outside surface 248 of the hollow fiber membrane 240.
  • the coating layer 250 may have a thickness 252 less than about 200 pm, which may be measured in a radial direction away from the hollow fiber membrane 240.
  • the coating layer 250 may have a thickness 252 less than about 20 pm.
  • the coating layer 250 may have a thickness 252 between about 5 pm and about 50 pm. It should be noted that a coating layer 250 with a thickness within the given values may not influence the mechanical properties of the hollow fiber membrane 240 used as a membrane contactor but may be, nonetheless, suitable for reliably preventing contact between an absorber liquid and the membrane contactor.
  • FIG. 3C shows a sectional view of the exemplary wetted hollow fiber membrane 240 coated with the coating layer 250 with the thickness 252 while the pores 300 may be wetted with the wetting agent 302, consistent with one or more exemplary embodiments of the present disclosure.
  • circulating the solvent through the membrane contactor module 202 may be held up during the circulation of the coating solution, such that the coating liquid cannot displace the wetting agent 302 throughout the process.
  • the coating solution may be injected by at least one injector 216 into the membrane contactor module 202 for intrusion of the coating solution through the coating layer 250 to form a uniform coating layer.
  • the injection of the coating solution may be carried out in order to applying a pressure onto the coating layer 250 that may lead to the penetration of some of the coating solution into the hollow fiber membrane pores. This penetration may cause filling a portion of the pores with the coating solution, resulting in forming a uniform coating layer in which a part of the uniform coating layer may be inside the pores.
  • the uniform coating layer with the penetrated section within the pores may provide a strong joint between the coating material and the hollow fiber membrane.
  • the obtained uniform coating layer may significantly prevents wetting problems of the hollow fiber membranes without any leakage.
  • FIG. 4 An exemplary implementation of the intrusion of the coating solution through the coating layer 250 is shown in FIG. 4, consistent with one or more exemplary embodiments of the present disclosure.
  • an amount of the coating solution may be injected with a constant pressure into at least one of the inside area 242 or the outside area 244 of the plurality of wetted hollow fiber membranes 204 for an intrusion 254 of the coating solution through the coating layer 250 and the pores 300 to form a uniform coating layer 256 that may include a mechanically enhanced and defect-free uniform coating layer.
  • the solvent and the coating solution may be drained/discharged from the membrane contactor module 202 to make the membrane contactor module 202 including a plurality of coated hollow fiber membranes ready for future use in separation applications, for example, gas-liquid contacting purposes.
  • the solvent and the coating solution may be drained/discharged from the membrane contactor module 202 by circulating a gas, for example, air or nitrogen through the membrane contactor module 202.
  • the membrane contactor module 202 may be dried to form a plurality of dried hollow fiber membranes 204 with a uniform coating layer 256.
  • each hollow fiber membrane may include a rather thin but very even layer of the coating solution stuck the coated side of the hollow fiber membrane.
  • a rare amount of wetting agent may be remained after the draining step 106.
  • a drying process may be needed to the coating solution and the solvent may be dried out from the membrane contactor module 202 to leave a plurality of dried hollow fiber membranes 204 with the uniform coating layer 256.
  • drying the membrane contactor module 202 may include curing the membrane contactor module 202 in an oven at a temperature between about 50°C and about 120°C, or drying the membrane contactor module 202 by UV irradiation, or drying the membrane contactor module 202 by circulating a drying gas, for example, air or nitrogen through the membrane contactor module 202.
  • drying the membrane contactor module 202 may include supplying the membrane contactor module 202 with a drying medium, for example air, after drainage of the coating solution, which may cause the drying period to be reduced such that the procedure of method 100 may be carried out in a shorter period of time.
  • the plurality of hollow fiber membranes 204 may be charged with curing means, for example, with UV radiation, or elevating temperature and/or pressure. Such a curing treatment may be beneficial with respect to the properties of the coating layer, depending on the coating material that may be used.
  • FIG. 3D shows a sectional view of an exemplary dried hollow fiber membrane 240 coated with a uniform coating layer 256, consistent with one or more exemplary embodiments of the present disclosure. It may be observed that the wetting agent 302 may not be present within the pores 300 after draining the solvent and the coating solution from the membrane contactor module 202 in step 106 and drying the membrane contactor module 202 in step 107.
  • the coating layer and consequently, the uniform coating layer may include a composite coating, which may include at least two different coating layers made from different coating agents using at least two different coating solutions.
  • the method 100 may further include repeating filling up at least one of the two liquid reservoirs with a coating solution (step 103), circulating the coating solution through the continuous circulating circuit to form a coating layer on a surface of at least one of the inside area, or the outside area of the plurality of wetted hollow fiber membranes (step 104), and injecting the coating solution by the injector for intrusion of the coating solution through the coating layer to form a uniform coating layer (step 105) in a cycle for different coating solutions, subsequently.
  • a double coating layer may be made of two coating layers which may be applied to the plurality of hollow fiber membranes in two consecutive cycles.
  • a first coating solution may be drained from the membrane contactor module and, afterwards, a second coating solution may be fed thereto, thereby eventually forming the double coating layer.
  • the membrane contactor module 202 equipped with the uniformly coated hollow fiber membranes 204 may be used for extraction of at least one gas from a gaseous flow, for example, gas sweetening, C0 2 capturing, for example, from air, etc.
  • EXAMPLE 1 Coating of Polvethersulfone hollow fibers
  • a membrane module including hollow fiber membranes made of polyethersulfone Xevonta 20 was supplied and the hollow fibers Xevonta 20 were coated by a silicone resin E43.
  • the inside and outside areas of the hollow fibers were filled by n-Hexane.
  • n-Hexane in the outside area of the hollow fibers was substituted with a solution of silicone resin E43 (about 10% wt.) and was circulated with a flow rate of about 100 cc/min for about 5 minutes.
  • n-Hexane was circulated simultaneously with a flow rate of about 100 cc/min.
  • FIG. 5A shows a SEM image of an exemplary polyethersulfone hollow fiber membrane 500 with a porous structure 501 coated with a PDMS coating layer 502 on both inside and outside surfaces of the hollow fiber membrane, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 5B shows a more magnified SEM image of a cross section of the exemplary polyethersulfone hollow fiber membrane 500 coated with the uniform and defect-free PDMS coating layer 502, consistent with one or more exemplary embodiments of the present disclosure.
  • the thickness of the PDMS coating layer 502 is less than about 10 pm.
  • EXAMPLE 2 CO2 capturing by coated hollow fiber membranes
  • CO2 was separated from air using an exemplary membrane contactor module 202 equipped with the uniformly coated hollow fiber membranes 204, which may be prepared according to the method 100 of the present disclosure.
  • the exemplary membrane contactor module 202 was used in an exemplary separation system 600 as shown in FIG. 6, consistent with one or more exemplary embodiments of the present disclosure.
  • the system 600 was used for extracting CO2 from air to obtain a CO2 percentage in the air flow of less than about 2% mol.
  • Table 1 represents the operational conditions and the initial and final CO2 concentrations in the air.
  • Table 1 operational conditions and results of separation of CO2 from air by coated hollow fiber membranes.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Urology & Nephrology (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un nouveau procédé de revêtement des contacteurs à membrane à fibres creuses sous la forme d'un module. Ce procédé, notamment pour contacteurs à membrane liquide-gaz, est essentiel et s'est avéré très efficace. Étant donné que le bullage de gaz dans la phase liquide et la fuite d'absorbant dans la phase gazeuse sont les défis principaux entraînant la perte de performance dans les contacteurs à membrane liquide-gaz, ce procédé est un moyen prometteur pour éviter de tels problèmes de fonctionnement. L'autre défi pour revêtir les contacteurs à membrane à fibres creuses dans la forme de module est de fournir un revêtement uniforme. Ce défi est résolu par un nouveau procédé d'injection introduit ici. Le procédé proposé est plus économique que le revêtement des fibres avant la fabrication du module.
PCT/IB2017/057795 2017-12-11 2017-12-11 Procédé et système de revêtement d'une membrane à fibres creuses Ceased WO2019116075A1 (fr)

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PCT/IB2017/057795 WO2019116075A1 (fr) 2017-12-11 2017-12-11 Procédé et système de revêtement d'une membrane à fibres creuses

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PCT/IB2017/057795 WO2019116075A1 (fr) 2017-12-11 2017-12-11 Procédé et système de revêtement d'une membrane à fibres creuses

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024074542A1 (fr) * 2022-10-07 2024-04-11 Fresenius Medical Care Deutschland Gmbh Revêtement de membranes à fibres creuses en ingénierie médicale iii

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140260968A1 (en) * 2013-03-15 2014-09-18 Shiguang Li Method and apparatus for desorption using a microporous membrane operated in wetted mode
US20140309471A1 (en) * 2013-04-15 2014-10-16 Shaojun Zhou Sweetening of natural gas
US20150053611A1 (en) * 2013-08-23 2015-02-26 Nanyang Technological University Hydrophobic organic-inorganic composite hollow fiber membrane and method of forming the same
KR20170050356A (ko) * 2015-10-30 2017-05-11 한국에너지기술연구원 전이금속-살렌(salen)유도체가 내면에 코팅된 산소 분리용 중공사막 및 그 제조방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140260968A1 (en) * 2013-03-15 2014-09-18 Shiguang Li Method and apparatus for desorption using a microporous membrane operated in wetted mode
US20140309471A1 (en) * 2013-04-15 2014-10-16 Shaojun Zhou Sweetening of natural gas
US20150053611A1 (en) * 2013-08-23 2015-02-26 Nanyang Technological University Hydrophobic organic-inorganic composite hollow fiber membrane and method of forming the same
KR20170050356A (ko) * 2015-10-30 2017-05-11 한국에너지기술연구원 전이금속-살렌(salen)유도체가 내면에 코팅된 산소 분리용 중공사막 및 그 제조방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024074542A1 (fr) * 2022-10-07 2024-04-11 Fresenius Medical Care Deutschland Gmbh Revêtement de membranes à fibres creuses en ingénierie médicale iii

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