WO2020059301A1 - Purificateur d'hydrogène et son procédé de fonctionnement - Google Patents

Purificateur d'hydrogène et son procédé de fonctionnement Download PDF

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Publication number
WO2020059301A1
WO2020059301A1 PCT/JP2019/029395 JP2019029395W WO2020059301A1 WO 2020059301 A1 WO2020059301 A1 WO 2020059301A1 JP 2019029395 W JP2019029395 W JP 2019029395W WO 2020059301 A1 WO2020059301 A1 WO 2020059301A1
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Prior art keywords
hydrogen
cathode
flow path
gas
purified
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PCT/JP2019/029395
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English (en)
Japanese (ja)
Inventor
田口　清
繁 飯山
貴広 楠山
憲有 武田
尾関　正高
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パナソニックＩｐマネジメント株式会社
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Priority to JP2020548067A priority Critical patent/JPWO2020059301A1/ja
Publication of WO2020059301A1 publication Critical patent/WO2020059301A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
    • H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present disclosure relates to a hydrogen purifier including an electrochemical device that generates a purified hydrogen gas having a higher hydrogen purity than a hydrogen-containing gas by utilizing an electrochemical reaction from the hydrogen-containing gas, and a method for operating the hydrogen purifier.
  • the hydrogen purifier includes an electrochemical device that generates a purified hydrogen gas having a higher hydrogen purity than the hydrogen-containing gas by utilizing an electrochemical reaction from the hydrogen-containing gas.
  • An electrochemical device is configured, for example, by sandwiching an electrolyte membrane-electrode assembly (MEA) provided with an anode and a cathode on both sides of an electrolyte membrane that selectively transports hydrogen ions by a separator.
  • MEA electrolyte membrane-electrode assembly
  • the hydrogen-containing gas supplied to the hydrogen purifier is obtained by steam-reforming and partially oxidizing hydrocarbon-based fuels, such as city gas and liquefied petroleum gas, using a hydrogen generator having a fuel processor. It is produced by performing quality or autothermal reforming.
  • the generated hydrogen-containing gas contains impurities such as carbon dioxide, methane, nitrogen, carbon monoxide, and water vapor.
  • the hydrogen-containing gas thus obtained is supplied to a cell, that is, an anode of an electrochemical device, and hydrogen is electrochemically separated by passing an electric current between the anode and the cathode, that is, by purifying the hydrogen.
  • a technique for generating purified hydrogen gas There is a technique for generating purified hydrogen gas.
  • the partial pressure of a component for example, impurities such as carbon dioxide and methane
  • the partial pressure of a component for example, impurities such as carbon dioxide and methane
  • impurities such as carbon dioxide and methane permeate the electrolyte membrane due to the partial pressure difference and move to the cathode. For this reason, the hydrogen purity of the purified hydrogen gas discharged from the cathode decreases.
  • FIG. 5 is a block diagram showing a configuration of a conventional hydrogen purifier disclosed in Non-Patent Document 1. As shown in FIG.
  • a conventional hydrogen purifier 121 includes a hydrogen-containing gas flow path 101, an electrolyte membrane 102 disposed between an anode 103 and a cathode 104, and a downstream end of the hydrogen-containing gas flow path 101 having an anode.
  • An electrochemical device 105 connected to the cathode 103 and an electrochemical device 115 in which the electrolyte membrane 112 is disposed between the anode 113 and the cathode 114, and the anode 113 is connected to the cathode 104 and the purified hydrogen gas flow path 107.
  • the conventional hydrogen purifier 121 includes a purified hydrogen gas flow path 117 connecting the cathode 114 to the hydrogen utilization device 141, a power source 106 having a positive electrode connected to the anode 103, a negative electrode connected to the cathode 104, and a positive electrode Is connected to the anode 113, a power supply 116 whose negative pole is connected to the cathode 114, an anode off-gas flow passage 108 whose upstream end is connected to the anode 103, and an anode off-gas flow passage 118 whose upstream end is connected to the anode 113. And a controller 131.
  • the hydrogen utilization device 141 is a tank that stores purified hydrogen gas supplied from the hydrogen purifier 121.
  • the electrochemical device 105 and the electrochemical device 115 are connected in series.
  • a hydrogen-containing gas is supplied to the anode 103 from the hydrogen-containing gas flow path 101 and the power supplies 106 and 116 supply current to the electrochemical devices 105 and 115, respectively, the purified hydrogen discharged from the cathode 104 of the electrochemical device 105
  • the gas is supplied to the anode 113 of the electrochemical device 115 via the purified hydrogen gas passage 107, and the purified hydrogen gas discharged from the cathode 114 of the electrochemical device 115 is used for hydrogen utilization through the purified hydrogen gas passage 117. It is supplied to the device 141.
  • the conventional hydrogen purifier 121 can further increase the hydrogen purity of the purified hydrogen gas discharged from the cathode 104 of the electrochemical device 105 with the electrochemical device 115. Thereby, the hydrogen purity of the purified hydrogen gas supplied to the hydrogen utilization device 141 is increased.
  • the hydrogen purity of the purified hydrogen gas can be increased by connecting two electrochemical devices 105 and 115 in series.
  • An object of the present disclosure is to provide a hydrogen purifier capable of increasing the hydrogen purity of purified hydrogen gas with a compact configuration using only one electrochemical device, and an operation method thereof.
  • the hydrogen purifier of the present disclosure is configured such that both main surfaces of an electrolyte membrane are sandwiched between an anode and a cathode, a hydrogen-containing gas is supplied to the anode, and a current flows between the anode and the cathode.
  • An electrochemical device configured to produce purified hydrogen gas having a higher hydrogen purity than the hydrogen-containing gas, a power supply configured to flow current between the anode and the cathode, and purified hydrogen from the cathode to the outside
  • a purified hydrogen gas flow path configured to supply gas and a purified hydrogen gas flow path from the middle of the purified hydrogen gas flow path such that the flow rate of the purified hydrogen gas generated at the cathode is greater than the flow rate of the purified hydrogen gas supplied to the outside.
  • a branch flow path for branching and flowing purified hydrogen gas.
  • the ratio of the amount of impurities to the cathode hydrogen is reduced by an amount corresponding to an increase in the flow rate of the purified hydrogen gas (hereinafter, also referred to as the cathode hydrogen) generated from the cathode. This is because the flow rate of the cathode hydrogen is larger than when the entire amount of the cathode hydrogen is supplied to the hydrogen utilization equipment, while the amount of impurities permeating the electrolyte membrane of the electrochemical device does not change with the flow rate of the cathode hydrogen. Based.
  • the hydrogen purity of the purified hydrogen gas can be increased with a compact configuration using only one electrochemical device.
  • the ratio of the amount of impurities permeating the electrolyte membrane of the electrochemical device to the flow rate of the purified hydrogen gas is reduced. Therefore, the hydrogen purity of the purified hydrogen gas is reduced by a compact configuration using only one electrochemical device. Can be provided.
  • FIG. 1 is a block diagram illustrating a configuration of the hydrogen purifier according to Embodiment 1 of the present disclosure.
  • FIG. 2 is a characteristic diagram illustrating a relationship between a current value flowing through the electrochemical device and the hydrogen purity of the purified hydrogen gas in the hydrogen purifier according to the first embodiment of the present disclosure.
  • FIG. 3 is a block diagram illustrating a configuration of the hydrogen purifier according to Embodiment 2 of the present disclosure.
  • FIG. 4 is a block diagram illustrating a configuration of a hydrogen purifier according to Embodiment 3 of the present disclosure.
  • FIG. 5 is a block diagram showing a configuration of a conventional hydrogen purifier.
  • the hydrogen purifier of the present disclosure is configured such that both main surfaces of an electrolyte membrane are sandwiched between an anode and a cathode, a hydrogen-containing gas is supplied to the anode, and a current flows between the anode and the cathode.
  • An electrochemical device configured to produce purified hydrogen gas having a higher hydrogen purity than the hydrogen-containing gas, a power supply configured to flow current between the anode and the cathode, and purified hydrogen from the cathode to the outside
  • a purified hydrogen gas flow path configured to supply gas and a purified hydrogen gas flow path from the middle of the purified hydrogen gas flow path such that the flow rate of the purified hydrogen gas generated at the cathode is greater than the flow rate of the purified hydrogen gas supplied to the outside.
  • a branch flow path for branching and flowing purified hydrogen gas.
  • the ratio of the amount of impurities to the cathode hydrogen is reduced by the amount of the flow rate of the cathode hydrogen generated from the cathode. This is because the flow rate of the cathode hydrogen is larger than when the entire amount of the cathode hydrogen is supplied to the hydrogen utilization equipment, while the amount of impurities permeating the electrolyte membrane of the electrochemical device does not change with the flow rate of the cathode hydrogen. Based.
  • the hydrogen purity of the purified hydrogen gas can be increased with a compact configuration using only one electrochemical device.
  • the hydrogen purifier of the present disclosure may further include a hydrogen-containing gas flow path that supplies a hydrogen-containing gas to the anode.
  • the branch flow path may be a reflux flow path that supplies purified hydrogen gas to the hydrogen-containing gas flow path from somewhere in the purified hydrogen gas flow path.
  • an adjusting unit that adjusts the flow rate of the purified hydrogen gas supplied to the outside, and the purified hydrogen gas generated at the cathode of the electrochemical device is provided with hydrogen upstream of the junction with the reflux flow path.
  • a controller configured to control the current of the power supply and the adjusting unit so as to be higher than the flow rate of the hydrogen-containing gas flowing through the content gas flow path may be provided.
  • the adjustment unit includes a purified hydrogen gas flow path adjustment valve that adjusts the flow rate of the purified hydrogen gas supplied to the outside, and a reflux flow path adjustment that adjusts the flow rate of the purified hydrogen gas that flows through the reflux flow path. And a valve.
  • the flow rate of the hydrogen-containing gas discharged without being used for generation of the purified hydrogen gas can be suppressed by the purified hydrogen gas flow path adjustment valve and the reflux flow path adjustment valve.
  • the operation method of the hydrogen purifier of the present disclosure is configured such that both main surfaces of the electrolyte membrane are sandwiched between an anode and a cathode, a hydrogen-containing gas is supplied to the anode, and a current flows between the anode and the cathode.
  • An electrochemical device configured to generate a purified hydrogen gas having a higher hydrogen purity than the hydrogen-containing gas at the cathode, a power supply configured to pass a current between the anode and the cathode, and Purified hydrogen gas flow path configured to supply purified hydrogen gas to the anode, hydrogen-containing gas flow path to supply hydrogen-containing gas to the anode, and purification in which the flow rate of purified hydrogen gas generated at the cathode is supplied to the outside
  • a recirculation flow path that supplies purified hydrogen gas to the hydrogen-containing gas flow path from the middle of the purified hydrogen gas flow path so as to be larger than the flow rate of the hydrogen gas, and an external supply gas
  • An adjusting unit for adjusting the flow rate of the hydrogen-producing gas and the flow rate of the purified hydrogen gas flowing through the reflux flow path, wherein the purified hydrogen gas generated at the cathode is formed in the reflux flow path.
  • each drawing is a schematic diagram and is not necessarily strictly illustrated.
  • substantially the same components are denoted by the same reference numerals, and description thereof may be omitted or simplified.
  • FIG. 1 is a block diagram illustrating a configuration of the hydrogen purifier according to Embodiment 1 of the present disclosure.
  • a hydrogen purifier 21 of the present embodiment includes a hydrogen-containing gas flow path 1, an electrochemical device 5 including an electrolyte membrane 2, an anode 3 and a cathode 4, a power supply 6,
  • the apparatus includes a purified hydrogen gas flow path 7, an anode off gas flow path 8, a purified hydrogen gas flow path adjustment valve 9, a cathode off gas flow path 10, a cathode off gas flow path adjustment valve 11, and a controller 31.
  • the hydrogen-containing gas flow path 1 is a flow path for supplying a hydrogen-containing gas to the anode 3.
  • the hydrogen-containing gas is generated by steam reforming city gas by a hydrogen generator.
  • the hydrogen purity of the hydrogen-containing gas supplied from the hydrogen-containing gas flow path 1 to the anode 3 is 80%.
  • the electrolyte membrane 2 is a polymer membrane that selectively transports hydrogen ions.
  • the anode 3 is composed of an electrode that extracts electrons from hydrogen molecules and generates hydrogen ions, and a flow path that supplies a hydrogen-containing gas supplied from the hydrogen-containing gas flow path 1 to the electrode.
  • the cathode 4 is composed of an electrode that combines hydrogen ions and electrons to generate hydrogen molecules, and a channel that discharges purified hydrogen gas, that is, cathode hydrogen, from the electrode.
  • the electrochemical device 5 includes the electrolyte membrane 2, the anode 3 disposed on one main surface of the electrolyte membrane 2, and the cathode 4 disposed on the other main surface of the electrolyte membrane 2. That is, the electrochemical device 5 is configured such that both main surfaces of the electrolyte membrane are sandwiched between the anode and the cathode.
  • the power supply 6 has a positive pole of the power supply 6 connected to the anode 3 and a negative pole of the power supply 6 connected to the cathode 4.
  • the power supply 6 allows a direct current to flow between the anode 3 and the cathode 4 of the electrochemical device 5.
  • the purified hydrogen gas flow path 7 is a flow path for supplying cathode hydrogen discharged from the cathode 4 to the hydrogen utilization device 41, that is, the outside of the hydrogen purifier 21.
  • the anode off-gas flow path 8 is a flow path for discharging the hydrogen-containing gas discharged from the anode 3.
  • the purified hydrogen gas flow path adjustment valve 9 is a flow rate adjustment valve provided in the purified hydrogen gas flow path 7.
  • the cathode offgas flow path 10 is a flow path that branches off from the purified hydrogen gas flow path 7 upstream of the purified hydrogen gas flow path adjustment valve 9 and joins the anode offgas flow path 8.
  • the cathode off-gas flow path adjusting valve 11 is a flow rate adjusting valve provided in the cathode off-gas flow path 10.
  • the controller 31 is configured to control the power supply 6, the purified hydrogen gas flow path adjustment valve 9, and the cathode off gas flow path adjustment valve 11. That is, the controller 31 controls the operation of the hydrogen purifier 21.
  • the controller 31 may be configured to include a signal input / output unit (not shown), an arithmetic processing unit (not shown), and a storage unit (not shown) for storing a control program.
  • the hydrogen utilization device 41 is a tank that stores purified hydrogen gas supplied from the hydrogen purifier 21.
  • the operation and operation of the hydrogen purifier 21 of the present embodiment configured as described above will be described below.
  • the following operation is performed by the controller 31 controlling the power supply 6, the purified hydrogen gas flow path adjustment valve 9, and the cathode off-gas flow path adjustment valve 11 of the hydrogen purifier 21.
  • the hydrogen-containing gas is supplied from the hydrogen-containing gas channel 1 to the anode 3 of the electrochemical device 5.
  • the controller 31 controls the power supply 6, the purified hydrogen gas flow control valve 9, and the cathode off-gas flow control so that the flow rate of the cathode hydrogen generated in the electrochemical device 5 is sufficient for the amount required by the hydrogen utilization equipment 41. Control the valve 11.
  • controller 31 controls the purified hydrogen gas flow path adjustment valve 9 so that the flow rate of the purified hydrogen gas supplied to the hydrogen utilization device 41 becomes the flow rate required in the hydrogen utilization device 41. Adjust to
  • the controller 31 controls the current value of the power supply 6 so that the flow rate of the cathode hydrogen generated at the cathode 4 is greater than the flow rate of the purified hydrogen gas supplied to the hydrogen utilization device 41. At this time, due to the operation of the power supply 6, a current flows from the cathode 4 to the anode 3 via the power supply 6. In addition, an operation of the power supply 6 causes a current to flow from the anode 3 to the cathode 4 via the electrolyte membrane 2.
  • the controller 31 controls the cathode off-gas flow control valve 11 to discharge purified hydrogen gas not supplied to the hydrogen utilization device 41 to the anode off-gas flow passage 8.
  • the off-gas discharged from the anode off-gas flow path 8 is used as a heat source for generating a hydrogen-containing gas. Therefore, off-gas is used without waste.
  • FIG. 2 is a characteristic diagram showing a relationship between a current value flowing through the electrochemical device 5 and hydrogen purity of purified hydrogen gas in the hydrogen purifier 21 of the first embodiment.
  • the hydrogen purity of the purified hydrogen gas increases. For example, when the current value flowing through the electrochemical device 5 is 10 A, the hydrogen purity of the purified hydrogen gas is 89%, and when the current value is 60 A, the hydrogen purity of the purified hydrogen gas is 99%.
  • the component of the hydrogen-containing gas supplied to the anode 3 and the component of the purified hydrogen gas of the cathode 4 pass through the electrolyte membrane 2 due to a difference in partial pressure between the components. Accordingly, the partial pressure of a component (for example, impurities such as carbon dioxide and methane) contained in the hydrogen-containing gas of the anode 3 is higher than the partial pressure of the same component contained in the purified hydrogen gas of the cathode 4. Therefore, impurities such as carbon dioxide and methane move from the anode 3 to the cathode 4 due to the partial pressure difference.
  • a component for example, impurities such as carbon dioxide and methane
  • the flow rate of the purified hydrogen gas supplied to the hydrogen utilization device 41 is 8 L / min, and the flow rate of the cathode hydrogen generated at the cathode 4 is 9 L / min, the supply to the hydrogen utilization device 41 is performed.
  • the hydrogen purity of the purified hydrogen gas to be obtained was 99%.
  • the purified hydrogen supplied to the hydrogen utilization equipment 41 is 8 L / min and the flow rate of the cathode hydrogen generated at the cathode 4 is 8 L / min, the purified hydrogen supplied to the hydrogen utilization equipment 41 is The hydrogen purity of the gas was 98%.
  • the impurity contained in the purified hydrogen gas can be halved from 2% to 1%. it can.
  • the cathode offgas flow path 10 that branches off from the purified hydrogen gas flow path 7 upstream of the purified hydrogen gas flow path adjustment valve 9 and joins the anode offgas flow path 8 is provided. I have.
  • the generated purified hydrogen gas can be reduced in a compact configuration using one electrochemical device 5.
  • the hydrogen purity of the purified hydrogen gas can be increased without wasting.
  • FIG. 3 is a block diagram illustrating a configuration of the hydrogen purifier according to Embodiment 2 of the present disclosure.
  • the hydrogen purifier 22 in the second embodiment shown in FIG. 3 is different from the hydrogen purifier 21 in the first embodiment shown in FIG. 1 in that the cathode of the hydrogen purifier 21 in the first embodiment is different in the second embodiment.
  • a reflux channel 12 and a reflux channel regulating valve 13 are provided in place of the off-gas channel 10 and the cathode off-gas channel regulating valve 11, and a controller 32 is provided instead of the controller 31 in the first embodiment. Is a point.
  • the reflux flow path 12 is a flow path that branches off from the purified hydrogen gas flow path 7 upstream of the purified hydrogen gas flow path adjustment valve 9 and joins the hydrogen-containing gas flow path 1.
  • the return flow path adjustment valve 13 is a flow rate adjustment valve provided in the return flow path 12.
  • the controller 32 is configured to control the power supply 6, the purified hydrogen gas flow path adjustment valve 9, and the reflux flow path adjustment valve 13. That is, the controller 32 controls the operation of the hydrogen purifier 22.
  • the controller 32 may include a signal input / output unit (not shown), an arithmetic processing unit (not shown), and a storage unit (not shown) for storing a control program.
  • the operation and action of the hydrogen purifier 22 of the present embodiment configured as described above will be described below.
  • the following operation is performed by the controller 32 controlling the power supply 6, the purified hydrogen gas flow path adjustment valve 9, and the reflux flow path adjustment valve 13 of the hydrogen purifier 22.
  • the hydrogen-containing gas is supplied from the hydrogen-containing gas channel 1 to the anode 3 of the electrochemical device 5.
  • the controller 32 controls the power supply 6, the purified hydrogen gas flow control valve 9, and the reflux flow control so that the flow rate of the purified hydrogen gas generated by the electrochemical device 5 is sufficient for the amount required by the hydrogen utilization device 41. Control the valve 13.
  • the controller 32 controls the purified hydrogen gas flow path adjusting valve 9 so that the flow rate of the purified hydrogen gas supplied to the hydrogen utilization device 41 becomes the flow rate required in the hydrogen utilization device 41. adjust.
  • the controller 32 controls the current value of the power supply 6 so that the flow rate of the cathode hydrogen generated at the cathode 4 is higher than the flow rate of the purified hydrogen gas supplied to the hydrogen utilization device 41. At this time, due to the operation of the power supply 6, a current flows from the cathode 4 to the anode 3 via the power supply 6. In addition, an operation of the power supply 6 causes a current to flow from the anode 3 to the cathode 4 via the electrolyte membrane 2.
  • the controller 32 controls the return flow path adjustment valve 13 to return the purified hydrogen gas not supplied to the hydrogen utilization device 41 to the hydrogen-containing gas flow path 1.
  • the flow rate of the purified hydrogen gas supplied to the hydrogen utilization device 41 is 8 L / min, and the flow rate of the cathode hydrogen generated at the cathode 4 is 9 L / min, the supply to the hydrogen utilization device 41 is performed.
  • the hydrogen purity of the purified hydrogen gas to be obtained was 99.5%.
  • the purified hydrogen supplied to the hydrogen utilization equipment 41 is 8 L / min and the flow rate of the cathode hydrogen generated at the cathode 4 is 8 L / min, the purified hydrogen supplied to the hydrogen utilization equipment 41 is The hydrogen purity of the gas was 98%.
  • the flow rate of cathode hydrogen generated at cathode 4 is increased from 8 L / min to 9 L / min, and 1 L / min of purified hydrogen gas is supplied to hydrogen-containing gas flow path 1 by reflux flow path 12.
  • impurities contained in the purified hydrogen gas can be suppressed from 2% to 0.5%, that is, the amount of impurities is reduced to one fourth.
  • the recirculation flow path 12 that branches off from the purified hydrogen gas flow path 7 upstream of the purified hydrogen gas flow path adjustment valve 9 and joins the hydrogen-containing gas flow path 1 is provided. I have.
  • FIG. 4 is a block diagram illustrating a configuration of a hydrogen purifier according to Embodiment 3 of the present disclosure.
  • the hydrogen purifier 23 in the third embodiment shown in FIG. 4 is different from the hydrogen purifier 22 in the second embodiment shown in FIG. 3 in that the hydrogen purifier 22 in the third embodiment is different from the hydrogen purifier 41 in the second embodiment.
  • a fuel cell 42, and the fuel cell 42 generates power using purified hydrogen gas supplied from the hydrogen purifier 23, and a controller 33 is provided instead of the controller 32 in the second embodiment.
  • the controller 33 controls the power supply 6, the purified hydrogen gas flow control valve 9, and the reflux flow control valve 13 so that the flow rate of the purified hydrogen gas generated in the electrochemical device 5 is larger than the flow rate of the hydrogen-containing gas. Control.
  • the flow rate of the purified hydrogen gas supplied to the fuel cell 42 is 3 L / min, and a hydrogen-containing gas having a hydrogen purity of 80% is supplied to the anode 3.
  • the flow rate of the hydrogen-containing gas flowing in the hydrogen-containing gas flow path 1 upstream of the junction with the reflux flow path 12 is 5 L / min, and the flow rate of the cathode hydrogen generated in the cathode 4 is 10 L / min. .
  • the flow rate of the purified hydrogen gas supplied to the fuel cell 42 is set to 3 L / min, the amount of hydrogen moving from the anode 3 to the cathode 4 is increased, and the ratio of the impurities moving relatively from the anode 3 to the cathode 4 is increased. Can be reduced.
  • the hydrogen purity of the purified hydrogen gas supplied to the fuel cell 42 was 99.5%. Further, the flow rate of the hydrogen gas discharged from the anode off-gas flow path 8 was suppressed to 1 L / min, that is, 1/5.
  • the flow rate of the purified hydrogen gas supplied to the fuel cell 42 is set to 3 L / min, and the flow rate of the hydrogen-containing gas flowing in the hydrogen-containing gas flow path 1 upstream of the junction with the reflux flow path 12 is set to 10 L / min. And the flow rate of the cathode hydrogen generated at the cathode 4 is 10 L / min.
  • the hydrogen purity of the purified hydrogen gas supplied to the fuel cell 42 was 99.5%.
  • the flow rate of hydrogen gas discharged into the anode off-gas flow path 8 was 5 L / min.
  • the flow rate of the hydrogen-containing gas flowing through the hydrogen-containing gas flow path 1 upstream of the junction with the reflux flow path 12 is made smaller than the flow rate of the cathode hydrogen generated from the cathode 4.
  • the flow rate of hydrogen discharged from the anode off-gas flow path 8 could be suppressed.
  • the flow rate of the cathode hydrogen generated at the cathode 4 is determined by the flow rate of the hydrogen-containing gas flowing through the hydrogen-containing gas flow path 1 upstream of the junction with the reflux flow path 12.
  • the hydrogen purifier and the operation method of the present disclosure can increase the hydrogen purity of purified hydrogen gas, and therefore can be used for producing purified hydrogen gas with high hydrogen purity from hydrogen-containing gas using an electrochemical device. Applicable.

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Abstract

L'invention concerne un purificateur d'hydrogène (21) comprenant : un dispositif électrochimique (5) ; une source d'alimentation électrique (6) ; un trajet de circulation d'hydrogène gazeux raffiné (7) qui est conçu de manière à envoyer de l'hydrogène gazeux raffiné provenant d'une cathode (4) vers l'extérieur ; et un trajet de circulation de ramification (10) qui part d'un point le long du trajet de circulation d'hydrogène gazeux raffiné (7) et dans lequel circule l'hydrogène gazeux raffiné, de telle sorte que le débit de l'hydrogène gazeux raffiné produit au niveau de la cathode (4) est supérieur au débit de l'hydrogène gazeux raffiné envoyé vers l'extérieur.
PCT/JP2019/029395 2018-09-20 2019-07-26 Purificateur d'hydrogène et son procédé de fonctionnement WO2020059301A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6249927A (ja) * 1985-08-23 1987-03-04 エア−．プロダクツ．アンド．ケミカルス．インコ−ポレ−テツド 水素精製に対するハイブリツドメンブレン／極低温方法
JP2011040259A (ja) * 2009-08-10 2011-02-24 Honda Motor Co Ltd 水素処理システム
JP2016530188A (ja) * 2013-06-28 2016-09-29 ヌヴェラ・フュエル・セルズ・インコーポレーテッド 電気化学セルを使用して精製されたガスを生産および提供する方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6249927A (ja) * 1985-08-23 1987-03-04 エア−．プロダクツ．アンド．ケミカルス．インコ−ポレ−テツド 水素精製に対するハイブリツドメンブレン／極低温方法
JP2011040259A (ja) * 2009-08-10 2011-02-24 Honda Motor Co Ltd 水素処理システム
JP2016530188A (ja) * 2013-06-28 2016-09-29 ヌヴェラ・フュエル・セルズ・インコーポレーテッド 電気化学セルを使用して精製されたガスを生産および提供する方法

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