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WO2025097294A1 - Appareil de production d'hydrogène à partir d'eau alcaline et système de production d'hydrogène - Google Patents

Appareil de production d'hydrogène à partir d'eau alcaline et système de production d'hydrogène Download PDF

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Publication number
WO2025097294A1
WO2025097294A1 PCT/CN2023/130146 CN2023130146W WO2025097294A1 WO 2025097294 A1 WO2025097294 A1 WO 2025097294A1 CN 2023130146 W CN2023130146 W CN 2023130146W WO 2025097294 A1 WO2025097294 A1 WO 2025097294A1
Authority
WO
WIPO (PCT)
Prior art keywords
alkaline water
electrode plates
hydrogen production
production equipment
anode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2023/130146
Other languages
English (en)
Chinese (zh)
Inventor
张兀
乔霄峰
司继松
张丽蕊
马托梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bluestar Beijing Chemical Machinery Co Ltd
Bluestar Beijing Chemical Machinery Co Ltd
Original Assignee
Bluestar Beijing Chemical Machinery Co Ltd
Bluestar Beijing Chemical Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bluestar Beijing Chemical Machinery Co Ltd, Bluestar Beijing Chemical Machinery Co Ltd filed Critical Bluestar Beijing Chemical Machinery Co Ltd
Priority to PCT/CN2023/130146 priority Critical patent/WO2025097294A1/fr
Publication of WO2025097294A1 publication Critical patent/WO2025097294A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/60—Constructional parts of cells

Definitions

  • the present application relates to alkaline water hydrogen production equipment, and in particular to an alkaline water hydrogen production equipment and a hydrogen production system.
  • alkaline water electrolysis water is electrolyzed using alkaline solution as an electrolyte, with hydrogen generated on the cathode side and oxygen generated on the anode side.
  • a diaphragm is provided between the cathode side and the anode side. The diaphragm can isolate the gases generated by the cathode and anode and allow the electrolyte to flow.
  • electricity costs account for more than 70% of the total cost
  • the DC energy consumption of the core electrolysis equipment accounts for more than 80% or even 90% of the electricity cost. Therefore, to improve the energy efficiency value of the equipment, it is necessary to reduce the unit cell voltage.
  • alkaline water hydrogen production equipment has some technical means to reduce the unit cell voltage, it cannot meet the ideal industrial demand for hydrogen production.
  • the present application provides an alkaline water hydrogen production equipment and a hydrogen production system, which can at least solve the aforementioned technical problems.
  • an alkaline water hydrogen production device comprising:
  • An alkaline water electrolysis cell is provided with a plurality of electrode plates, wherein the plurality of electrode plates are arranged in sequence at set intervals; when the electrode plates are powered on, the plurality of electrode plates are arranged in a manner that anodes and cathodes face each other;
  • At least a portion of the plurality of electrode plates is installed with an elastic component.
  • the gas phase pressure of the anode electrode plate among the plurality of electrode plates is made higher than the gas phase pressure of the cathode electrode plate.
  • At least a portion of the plurality of electrode plates is installed with an elastic component, including:
  • the elastic component is mounted on the anode electrode plate.
  • the plurality of electrode plates are structures of anode film spacing.
  • the thickness of the elastic components installed on different anode electrode plates is different.
  • At least a portion of the plurality of electrode plates is installed with an elastic component, including:
  • the elastic component is mounted on the cathode electrode plate.
  • the plurality of electrode plates are a cathode film pole pitch structure.
  • the device further comprises:
  • the electrolyte storage tank is connected to the alkaline water electrolysis tank and automatically replenishes the electrolyzed alkaline water in the alkaline water electrolysis tank.
  • the alkaline water electrolysis cell is also provided with valve instruments for controlling temperature, pressure and flow respectively.
  • the electrolysis state of the alkaline water electrolysis cell can be obtained through the valve instruments, and the temperature, pressure and flow of the electrolyte can be conveniently controlled based on the electrolysis state.
  • a hydrogen production system comprising the alkaline water hydrogen production equipment.
  • the technical solution of the embodiment of the present application is to adjust the overall voltage of hydrogen production of the alkaline water hydrogen production equipment by improving the membrane distance between the electrode plates in the alkaline water hydrogen production equipment to achieve the purpose of energy saving.
  • the embodiment of the present application sets an elastic component in the electrode plate to push the anode electrode toward the cathode as much as possible to reduce the unit cell voltage, and at the same time, in the process control, keep the gas phase pressure on the anode side greater than the gas phase pressure on the cathode side, so that the purity of the gas generated by the electrolysis reaction is reduced, and at the same time, the safety of the alkaline water hydrogen production electrolyzer and process is improved.
  • FIG1 shows a schematic structural diagram of an alkaline water hydrogen production device provided in an embodiment of the present application.
  • FIG. 1 shows a schematic diagram of the structure of an alkaline water hydrogen production device provided in an embodiment of the present application, as shown in FIG. 1
  • the alkaline water hydrogen production equipment of the embodiment of the present application includes an alkaline water electrolyzer, which includes at least one anode plate and at least one cathode plate, and the anode plate and the cathode plate are connected to a power supply to electrolyze the alkaline water electrolyte.
  • An oxygen regulating valve is provided on the anode plate side to adjust the pressure on the anode side.
  • the electrolytic oxygen of the anode plate is processed by the oxygen processing unit and output to the oxygen purity analysis module for purity analysis, and output to the corresponding oxygen collection bin.
  • a hydrogen regulating valve is provided on the cathode plate side to adjust the pressure on the cathode side.
  • the electrolytic hydrogen on the cathode plate side is processed by the hydrogen processing unit and output to the hydrogen purity analysis module for purity analysis, and output to the corresponding hydrogen collection bin.
  • the main factors constituting the unit cell voltage among the main factors constituting the unit cell voltage, the theoretical decomposition voltage of electrolysis, the voltage drop of the loop metal conductor, the ohmic voltage drop on the anode and cathode sides, the voltage drop of the diaphragm, and the overpotential of the oxygen and hydrogen evolution electrode used are included.
  • the main factors affecting the cell voltage one is the structural factors of the electrolyzer, including the structural design of the electrolyzer, the arrangement and inter-electrode spacing of the electrodes, the conductivity of the conductor, the surface resistance of the diaphragm, and the structure and performance of the anode and cathode electrodes.
  • the second is the operating factors, including the pressure and pressure difference control in the electrolyzer, the circulation amount of the electrolyte, the concentration and temperature of the electrolyte.
  • the problem to be solved by the embodiments of the present application is to reduce the cell voltage of the unit cell while maintaining a zero-pole gap structure, and not reduce the purity of the gas produced by the electrolysis reaction, while improving the safety of the alkaline water hydrogen production electrolysis cell and process.
  • the alkaline water hydrogen production equipment of the embodiment of the present application comprises:
  • An alkaline water electrolysis cell is provided with a plurality of electrode plates, wherein the plurality of electrode plates are arranged in sequence at set intervals; when the electrode plates are powered on, the plurality of electrode plates are arranged in a manner such that anodes and cathodes are opposite to each other; in the embodiment of the present application, although only one group of electrode plates is shown in FIG1 , as an implementation method, a plurality of electrode plate groups may be provided.
  • At least a portion of the multiple electrode plates are installed with elastic components.
  • the spacing between the anode and cathode in the electrode plates can be made closer, thereby reducing the voltage between the anode and cathode.
  • the gas phase pressure of the anode electrode plate among the plurality of electrode plates is made higher than the gas phase pressure of the cathode electrode plate.
  • the gas phase pressure on the anode plate side is controlled to be greater than the pressure on the cathode plate side.
  • the pressure difference can be maintained at about 100 mm water column, so that the diaphragm is as close to the cathode electrode as possible, so that the hydrogen content in oxygen can be reduced and the purity of hydrogen can be ensured.
  • the elastic component can be installed on the anode electrode plate.
  • the elastic component can also be installed on the cathode electrode plate.
  • the multiple electrode plates are of a cathode membrane spacing structure, that is, the alkaline water electrolyzer of the embodiment of the present application can adopt the cathode membrane spacing method.
  • the thickness of the elastic components installed on different anode electrode plates is different, so as to adjust the electrolysis voltage according to the spacing distance between the anode electrode plate and the cathode electrode plate.
  • the plurality of electrode plates are of an anode membrane spacing structure, that is, the alkaline water electrolyzer of the embodiment of the present application may also adopt an anode membrane spacing method.
  • the device further includes:
  • the electrolyte storage tank is connected to the alkaline water electrolysis tank and automatically replenishes the electrolyzed alkaline water in the alkaline water electrolysis tank.
  • the alkaline water electrolysis cell is further provided with valve instruments for controlling temperature, pressure and flow respectively, and the electrolysis state of the alkaline water electrolysis cell can be obtained through the valve instruments.
  • the temperature, pressure and flow rate of the electrolyte can be conveniently controlled based on the electrolysis state.
  • the alkaline water electrolyzer adopts the scheme of cathode membrane pole distance, and the elastic component is installed on the cathode.
  • the gas phase pressure of the anode is controlled to be slightly higher than the gas phase pressure of the cathode;
  • the anode and cathode of the alkaline water electrolyzer both adopt elastic structures, and are equipped with elastic components of different thicknesses, and the gas phase pressure of the anode is controlled to be slightly higher than the gas phase pressure of the cathode;
  • the alkaline water electrolyzer adopts the structure of anode membrane pole distance, and the gas phase pressure of the anode is controlled to be higher than the gas phase pressure of the cathode.
  • different electrode schemes are used to select a scheme that can ensure the purity of hydrogen, keep the hydrogen in the oxygen on the anode side within a safe range, and ensure that the cell voltage is low.
  • Table 1 The specific implementation plan and results are shown in Table 1 below.
  • a scheme and process control method that can improve the safety of hydrogen production in an alkaline water electrolysis cell and reduce the voltage of a unit cell is: using a unit cell with anodes and cathodes back to back, the cathode of the unit cell adopts a mesh form, an elastic structure is installed on the anode side, and an electrode formula of formula W is adopted, and at the same time, the gas phase pressure on the anode plate side is controlled to be greater than that on the cathode plate side, and the pressure difference is about 100mm
  • the water column makes the diaphragm as close to the cathode electrode as possible.
  • This solution can not only reduce the hydrogen content in oxygen, but also ensure the purity of hydrogen, and at the same time obtain a lower unit cell voltage.
  • the technical solution of the embodiment of the present application is only described as an example of a better technical solution, the other technical solutions in Table 1 are also technical solutions that can be adopted, and they can also be used as candidate technical solutions for adoption, which are also part of the technical solution of the embodiment of the present application.
  • the embodiment of the present application also describes a hydrogen production system, which includes the alkaline water hydrogen production equipment of the above embodiment.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

Sont divulgués dans la présente demande un appareil de production d'hydrogène à partir d'eau alcaline et un système de production d'hydrogène. L'appareil de production d'hydrogène comprend une cellule électrolytique à eau alcaline, une pluralité de plaques d'électrode étant insérées dans la cellule électrolytique à eau alcaline, et la pluralité de plaques d'électrode étant agencées de manière séquentielle à des intervalles définis ; lorsque les plaques d'électrode sont mises sous tension, la pluralité de plaques d'électrode sont agencées de telle sorte qu'une anode et une cathode se font face ; et au moins certaines de la pluralité de plaques d'électrode sont chacune pourvues d'un ensemble élastique. Dans la présente demande, un ensemble élastique est disposé dans une plaque d'électrode pour pousser l'anode vers la cathode autant que possible, ce qui permet de réduire la tension d'une cellule unitaire ; de plus, pendant la commande de processus, une pression de phase gazeuse sur le côté anode est maintenue supérieure à celle sur le côté cathode, de telle sorte que la pureté d'un gaz généré par l'intermédiaire d'une réaction électrolytique est réduite, et la sécurité de la cellule électrolytique et du processus de production d'hydrogène à partir d'eau alcaline est améliorée.
PCT/CN2023/130146 2023-11-07 2023-11-07 Appareil de production d'hydrogène à partir d'eau alcaline et système de production d'hydrogène Pending WO2025097294A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/130146 WO2025097294A1 (fr) 2023-11-07 2023-11-07 Appareil de production d'hydrogène à partir d'eau alcaline et système de production d'hydrogène

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/130146 WO2025097294A1 (fr) 2023-11-07 2023-11-07 Appareil de production d'hydrogène à partir d'eau alcaline et système de production d'hydrogène

Publications (1)

Publication Number Publication Date
WO2025097294A1 true WO2025097294A1 (fr) 2025-05-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110199055A (zh) * 2017-02-21 2019-09-03 旭化成株式会社 阳极、水电解用阳极、电解单元以及氢的制造方法
CN212865009U (zh) * 2020-07-07 2021-04-02 蓝星(北京)化工机械有限公司 膜极距离子膜电解槽
CN113279003A (zh) * 2020-02-18 2021-08-20 株式会社大阪曹达 用于电解槽的电极结构
CN117568826A (zh) * 2023-10-31 2024-02-20 蓝星(北京)化工机械有限公司 碱水制氢设备及制氢系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110199055A (zh) * 2017-02-21 2019-09-03 旭化成株式会社 阳极、水电解用阳极、电解单元以及氢的制造方法
CN113279003A (zh) * 2020-02-18 2021-08-20 株式会社大阪曹达 用于电解槽的电极结构
CN212865009U (zh) * 2020-07-07 2021-04-02 蓝星(北京)化工机械有限公司 膜极距离子膜电解槽
CN117568826A (zh) * 2023-10-31 2024-02-20 蓝星(北京)化工机械有限公司 碱水制氢设备及制氢系统

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