WO2024115782A1 - Electrolyzer with an adjustable broadband range - Google Patents

Electrolyzer with an adjustable broadband range Download PDF

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Publication number
WO2024115782A1
WO2024115782A1 PCT/EP2023/084020 EP2023084020W WO2024115782A1 WO 2024115782 A1 WO2024115782 A1 WO 2024115782A1 EP 2023084020 W EP2023084020 W EP 2023084020W WO 2024115782 A1 WO2024115782 A1 WO 2024115782A1
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WO
WIPO (PCT)
Prior art keywords
electrode plate
electrode
plate
sub
plates
Prior art date
Application number
PCT/EP2023/084020
Other languages
French (fr)
Inventor
Zhao XIAOLIANG
Zhang ZHONGQI
Tang SHUQIN
Song YAPING
Original Assignee
John Cockerill Hydrogen Belgium
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Publication date
Application filed by John Cockerill Hydrogen Belgium filed Critical John Cockerill Hydrogen Belgium
Publication of WO2024115782A1 publication Critical patent/WO2024115782A1/en

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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
    • 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
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • 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
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • 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
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C25B9/77—Assemblies comprising two or more cells of the filter-press type having diaphragms
    • 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
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

Definitions

  • the invention relates to the technical field of electrolysis , in particular to an electrolyzer with an adj ustable broadband range .
  • An electrolyzer is a device for electrolytic reaction and it is the core component of a hydrogen production system by water electrolysis .
  • the electrolyzer is composed of a body, an anode and a cathode , and the anode chamber and the cathode chamber are separated by a diaphragm .
  • direct current passes through the electrolyzer, an oxidation reaction occurs at the interface between the anode and the solution to produce oxygen .
  • a reduction reaction occurs at the interface between the cathode and the solution to produce hydrogen .
  • the gas purity is mainly determined by the following : pressure, current density and material .
  • the gas purity will decrease obviously when the electrolyzer operates at low power density, and the gas purity will also decrease significantly when the pressure increases .
  • the invention provides an electrolyzer with an adj ustable broadband range which solves the above problems .
  • An electrolyzer with an adj ustable broadband range comprising:
  • a body the body has a first end and a second opposite end and a plurality of electrolysis chambers being spaced apart in the body .
  • a first electrode plate and a second electrode plate located in the body the first electrode plate is located between the first end and the electrolysis chamber close to the first end, and the second electrode plate is located between the second end and the electrolysis chamber close to the second end .
  • the electrolyzer further comprises at least one third electrode plate located in the body and between two adj acent electrolysis chambers , the first electrode plate, the second electrode plate , and the third electrode plate are either a negative plate or a positive plate .
  • the polarity of the second electrode plate and the polarity of the third electrode plate are the same and opposite to the polarity of the first electrode plate ;
  • the polarity of the first electrode plate and the polarity of the second electrode plate are the same , there are multiple third electrode plates , and the polarity of some of the third electrode plates is the same as the polarity of the first electrode plate , the polarity of the other third electrode plates is opposite to the polarity of the first electrode plate ;
  • the polarity of the first electrode plate and the polarity of the second electrode plate are the same , there are multiple third electrode plates , and the polarity of the third electrode plates is opposite to the polarity of the first electrode plate .
  • the first electrode plate is a negative plate
  • the second electrode plate and the third electrode plate are positive plates
  • a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate
  • the first electrode plate is a positive plate
  • the second electrode plate and the third electrode plate are negative plates
  • a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate .
  • the third electrode plate located in the middle or close to the middle is the positive plate and the rest are negative plates .
  • the electrolysis chamber further comprises a plurality of sub-chambers , the electrolytes of the plurality of sub-chambers are connected with each other, and the plurality of sub-chambers are electrically connected in parallel in the body and arranged side by side from the first end of the body to the second end of the body .
  • the sub-chamber comprises a diaphragm, a first sub-electrode and a second sub-electrode with opposite polarities , and the diaphragm is located between the first sub-electrode and the second sub-electrode , both the first sub-electrode and the second sub-electrode extend into the same sub-chamber and are used to electrolyze the electrolyte .
  • the electrolyzer further comprises a power source and an ammeter, wherein a plurality of first subelectrodes are connected in parallel to the positive pole of the power source, a plurality of second sub-electrodes are connected in parallel to the negative pole of the power source , the ammeter is connected in series in the circuit loop of the electrolyzer and is used to detect the current of the power source .
  • the first sub-electrode and the second sub-electrode are made of copper or iron, and the electrolyte in the electrolyzer is lye .
  • the width of the sub-chamber is 0 . 5-15 cm .
  • the first electrode plate, the second electrode plate and the third electrode plate are respectively provided with conductive plates for externally connecting to the power source .
  • the beneficial effects of the invention at least include :
  • one negative plate and one positive plate may be chosen from the plurality of the first, second and third electrode plates , and be connected to the power source so as to form a concentrated electric field in the body .
  • the ions participating in the reaction during electrolysis are then concentrated in an electrolysis chamber, and the electric power density in the electrolyzer is increased and high-purity hydrogen is produced .
  • Fig . 1 is a schematic diagram of an electrolyzer with one negative plate and multiple positive plates according to an embodiment of the invention
  • Fig . 2 is a first schematic diagram of an electrolyzer with one positive plate and multiple negative plates according to an embodiment of the invention
  • Fig . 3 is a second schematic diagram of an electrolyzer with one positive plate and multiple negative plates according to an embodiment of the invention
  • Fig . 4 is a schematic diagram of an electrolyzer with multiple positive plates and multiple negative plates according to an embodiment of the invention .
  • Example embodiments will now be described more completely with reference to the drawings .
  • Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete , and will fully convey the concepts of example embodiments to those skilled in the art .
  • the same reference numerals denote the same or similar structures in the drawings , and thus repeated descriptions of them will be omitted .
  • the invention provides an electrolyzer with an adj ustable broadband range , comprising : a body 4 , a first electrode plate, a second electrode plate and at least one third electrode plate .
  • the body 4 body has a first end and a second opposite end .
  • a plurality of electrolysis chambers 5 are spaced apart in the body 4 .
  • the electrolytes of each of the electrolysis chambers 5 is connected with each other .
  • a first electrode plate and a second electrode plate are located in the body 4 .
  • the first electrode plate is located between the first end and the electrolysis chamber 5 close to the first end .
  • the second electrode plate is located between the second end and the electrolysis chamber 5 close to the second end .
  • a third electrode plate is located in the body and between two adj acent electrolysis chambers 5 .
  • the first electrode plate, the second electrode plate, and the third electrode plate are either a negative plate 2 or a positive plate 1 .
  • the first end and the second end are both opposite ends of the body 4 .
  • the body 4 is a rectangular body 4
  • the first end is , for example , the left edge of the body 4
  • the second end is the right edge of the body 4 .
  • Two adj acent electrolysis chambers 5 are separated by a first electrode plate or a second electrode plate or a third electrode plate .
  • the polarity of the second electrode plate and the polarity of the third electrode plate are the same and opposite to the polarity of the first electrode plate .
  • the polarity of the first electrode plate and the polarity of the second electrode plate are the same, there are multiple third electrode plates , and the polarity of some of the third electrode plates is the same as the polarity of the first electrode plate, the polarity of the other third electrode plates is opposite to the polarity of the first electrode plate .
  • the polarity of the first electrode plate and the polarity of the second electrode plate are the same, there are multiple third electrode plates , and the polarity of the third electrode plates is opposite to the polarity of the first electrode plate .
  • a first electrode plate and a third electrode plate or a second electrode plate and a third electrode plate , or a first electrode plate and a second electrode plate , which have a corresponding spacing and opposite polarities , could be chosen to be connected to the power source so as to form an electric field and concentrate the ions in the electrolyte in the electric field at a certain location .
  • the purity of the produced hydrogen can still be maintained at a high level even though the ion concentration in the electrolyzer decreases .
  • the first electrode plate is a negative plate 2
  • the second electrode plate and the third electrode plate are positive plates 1
  • a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate .
  • a negative plate 2 arranged at one end of the electrolyzer is connected to the power source
  • multiple positive plates 1 are equidistantly distributed on the same side of the negative plate 2 and one of them is chosen to be connected to the power source depending on the current power density in the electrolyzer .
  • the chosen positive plate cooperates with the negative plate 2 to form an electric field, and the ions are concentrated between this positive plate 1 and this negative plate 2 by the electric field force .
  • the electrolyzer then electrolyzes the electrolyte between the positive plate 1 and the negative plate 2 to produce high-purity hydrogen .
  • the first electrode plate is a positive plate 1
  • the second electrode plate and the third electrode plate are negative plates 2
  • a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate .
  • This arrangement of positive and negative plates is opposite to that of the above example, but the practical implementation thereof is similar : one positive plate 1 is connected to the power source, and one of the negative plates 2 is chosen to be connected to the power source to form an electric field .
  • the ions are concentrated in this electric field by the attraction effect of the electric field force and high-purity hydrogen is produced in the electrolyzer .
  • the negative plate 2 and the positive plate 1 that are farthest apart from each other may be connected to the power source initially .
  • a large electric field may be formed between both ends of the electrolyzer to guide the ions to swim in the liquid, so that the rate of hydrogen production with electrolysis is relatively stable .
  • the ion concentration in the electrolyzer body 4 decreases .
  • This newly connected positive plate 1 cooperates with the fixed negative plate 2 to form an electric field that is smaller than the previous one by a unit spacing .
  • the distance between the negative plate 2 and the positive plate 1 connected to the power source is gradually adj usted, so that the efficiency of hydrogen production and the purity of produced hydrogen can be maintained to the max extent .
  • the third electrode plate located in the middle or close to the middle is the positive plate 1 and the rest are negative plates 2 .
  • the positive plate 1 can be two or one of the electrode plates in the middle of the plurality of electrode plates . I f the number of the third electrode plates is 2N+1 , the positive plate 1 is the middle one of the third electrode plates .
  • the positive plate 1 and the negative plate 2 may be chosen depending on the power density of the electrolyte in the body 4 to form an electric field of a suitable size , so as to make the purity of hydrogen produced meet the production standards .
  • the third electrode plate located in the middle or close to the middle is the negative plate 2 and the rest are positive plates 1 .
  • the negative plate 2 can be two or one of the electrode plates in the middle of the plurality of electrode plates . I f the number of the third electrode plates is 2N+1 , the negative plate 2 is the middle one of the third electrode plates .
  • the process for choosing the positive plate 1 and the negative plate 2 is no longer detailed .
  • the electrolysis chamber 5 further comprises a plurality of sub-chambers 51 , the electrolytes of the plurality of sub-chambers 51 are connected with each other, and the plurality of subchambers 51 are electrically connected in parallel in the body 4 and arranged side by side from the first end of the body 4 to the second end of the body 4 . That is , the plurality of sub-chambers 51 of each electrolysis chamber 5 are evenly arranged inside , and the width of a subchamber 51 is 0 . 5-15 cm . It is proved that the subchamber 51 with this range of width can achieve a better hydrogen production rate and purity while occupying less space .
  • the sub-chambers 51 are distributed linearly, and the hydrogen and oxygen produced by each sub-chamber 51 are respectively transported through pipelines and collected in a larger tank for storage after being purified . Comparing to a single electrolyzer, the rate of hydrogen production with multiple sub-chambers 51 is higher
  • the sub-chamber 51 comprises a diaphragm, a first sub-electrode and a second sub-electrode with opposite polarities .
  • the first sub-electrodes and the second sub-electrodes are made of copper or iron, for example .
  • the first sub-electrode and the second subelectrode are electrically connected to the positive pole or negative pole of the power source respectively, acting as the anode and cathode during electrolysis respectively .
  • the diaphragm is located between the first sub-electrode and the second sub-electrode, both the first sub-electrode and the second sub-electrode extend into the same sub-chamber 51 and are used to electrolyze the electrolyte .
  • the materials of the diaphragm may be chosen from asbestos , polyester cloth, nylon mesh membrane , bisque firing ceramic plate , polymer anion-cation exchange membrane .
  • the electrolyzer further comprises a power source and an ammeter .
  • a plurality of first subelectrodes are connected in parallel to the positive pole of the power source
  • a plurality of second subelectrodes are connected in parallel to the negative pole of the power source .
  • the ammeter is connected in series in the circuit loop of the electrolyzer and is used to detect the current of the power source .
  • the ammeter is connected in series in the circuit loop of the power source, the first sub-electrodes of the multiple subchambers 51 are connected in parallel , and the multiple second sub-electrodes are connected in parallel .
  • the ammeter acquires the current consumption of all subchambers 51 .
  • the decrease in the readings of the ammeter indicates the decrease of the power density in the electrolyte . Then, it is necessary to choose another combination of the positive plate 1 and the negative plate 2 to be connected to the power source and adj ust the size of the electric field .
  • the power source for forming an electric field and the power source for connecting the sub-electrodes to produce hydrogen are preferably different power sources that are independent with each other .
  • the first electrode plate , the second electrode plate and the third electrode plate are respectively provided with conductive plates 3 for externally connecting to a power source .
  • the first electrode plate , the second electrode plate and the third electrode plate are connected to the power source by the corresponding conductive plate 3 , respectively .
  • the first electrode plate , the second electrode plate and the third electrode plate are connected to either end of the electrolysis chamber 5 , respectively, to achieve the functions of enlarging the area of the electric field, guiding the movement of ions , and stably controlling the production rate and the purity of hydrogen .

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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)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention concerns an electrolyzer with an adjustable broadband range, comprising : a body, a first electrode plate and a second electrode plate. The body has a first end and a second opposite end. A plurality of electrolysis chambers are spaced apart in the body. It further comprises at least one third electrode plate located in the body and between two adjacent electrolysis chambers. The first electrode plate, the second electrode plate, and the third electrode plate are either a negative plate or a positive plate. One negative plate and one positive plate may be chosen from the plurality of the first, second and third electrode plates, and be connected to the power source so as to form a concentrated electric field in the body. The ions participating in the reaction during electrolysis are then concentrated in an electrolysis chamber, and the electric power density in the electrolyzer is increased and high-purity hydrogen is produced.

Description

ELECTROLYZER WITH AN ADJUSTABLE BROADBAND RANGE
TECHNICAL FIELD
The invention relates to the technical field of electrolysis , in particular to an electrolyzer with an adj ustable broadband range .
BACKGROUND
An electrolyzer is a device for electrolytic reaction and it is the core component of a hydrogen production system by water electrolysis . The electrolyzer is composed of a body, an anode and a cathode , and the anode chamber and the cathode chamber are separated by a diaphragm . When direct current passes through the electrolyzer, an oxidation reaction occurs at the interface between the anode and the solution to produce oxygen . A reduction reaction occurs at the interface between the cathode and the solution to produce hydrogen .
In the case of good sealing, only for the electrolyzer, the gas purity is mainly determined by the following : pressure, current density and material . The gas purity will decrease obviously when the electrolyzer operates at low power density, and the gas purity will also decrease significantly when the pressure increases .
Therefore, there is still a need for an electrolyzer with an adj ustable broadband range to produce high-purity hydrogen under the premise of low power density . SUMMARY
The invention provides an electrolyzer with an adj ustable broadband range which solves the above problems .
The purpose of this invention is achieved by the following technical solutions :
An electrolyzer with an adj ustable broadband range , comprising :
A body, the body has a first end and a second opposite end and a plurality of electrolysis chambers being spaced apart in the body .
A first electrode plate and a second electrode plate located in the body, the first electrode plate is located between the first end and the electrolysis chamber close to the first end, and the second electrode plate is located between the second end and the electrolysis chamber close to the second end .
The electrolyzer further comprises at least one third electrode plate located in the body and between two adj acent electrolysis chambers , the first electrode plate, the second electrode plate , and the third electrode plate are either a negative plate or a positive plate .
Wherein the polarity of the second electrode plate and the polarity of the third electrode plate are the same and opposite to the polarity of the first electrode plate ;
Or, the polarity of the first electrode plate and the polarity of the second electrode plate are the same , there are multiple third electrode plates , and the polarity of some of the third electrode plates is the same as the polarity of the first electrode plate , the polarity of the other third electrode plates is opposite to the polarity of the first electrode plate ;
Or, the polarity of the first electrode plate and the polarity of the second electrode plate are the same , there are multiple third electrode plates , and the polarity of the third electrode plates is opposite to the polarity of the first electrode plate .
Preferably, the first electrode plate is a negative plate, the second electrode plate and the third electrode plate are positive plates , and a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate . Preferably, the first electrode plate is a positive plate, the second electrode plate and the third electrode plate are negative plates , and a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate . Preferably, among the plurality of third electrode plates , the third electrode plate located in the middle or close to the middle is the positive plate and the rest are negative plates .
Preferably, among the plurality of third electrode plates , the third electrode plate located in the middle or close to the middle is the negative plate and the rest are positive plates . Preferably, the electrolysis chamber further comprises a plurality of sub-chambers , the electrolytes of the plurality of sub-chambers are connected with each other, and the plurality of sub-chambers are electrically connected in parallel in the body and arranged side by side from the first end of the body to the second end of the body .
Preferably, the sub-chamber comprises a diaphragm, a first sub-electrode and a second sub-electrode with opposite polarities , and the diaphragm is located between the first sub-electrode and the second sub-electrode , both the first sub-electrode and the second sub-electrode extend into the same sub-chamber and are used to electrolyze the electrolyte .
Preferably, the electrolyzer further comprises a power source and an ammeter, wherein a plurality of first subelectrodes are connected in parallel to the positive pole of the power source, a plurality of second sub-electrodes are connected in parallel to the negative pole of the power source , the ammeter is connected in series in the circuit loop of the electrolyzer and is used to detect the current of the power source .
The first sub-electrode and the second sub-electrode are made of copper or iron, and the electrolyte in the electrolyzer is lye .
Preferably, the width of the sub-chamber is 0 . 5-15 cm .
Preferably, the first electrode plate, the second electrode plate and the third electrode plate are respectively provided with conductive plates for externally connecting to the power source .
Compared with the prior art , the beneficial effects of the invention at least include :
By arranging a plurality of the first electrode plates , second electrode plates and third electrode plates in the electrolyzer at intervals , when the electrolysis chamber participates in the electrolysis reaction and the power density of the electrolyte in the electrolyzer gradually decreases , one negative plate and one positive plate may be chosen from the plurality of the first, second and third electrode plates , and be connected to the power source so as to form a concentrated electric field in the body . The ions participating in the reaction during electrolysis are then concentrated in an electrolysis chamber, and the electric power density in the electrolyzer is increased and high-purity hydrogen is produced .
DESCRIPTION OF DRAWINGS
Fig . 1 is a schematic diagram of an electrolyzer with one negative plate and multiple positive plates according to an embodiment of the invention;
Fig . 2 is a first schematic diagram of an electrolyzer with one positive plate and multiple negative plates according to an embodiment of the invention;
Fig . 3 is a second schematic diagram of an electrolyzer with one positive plate and multiple negative plates according to an embodiment of the invention;
Fig . 4 is a schematic diagram of an electrolyzer with multiple positive plates and multiple negative plates according to an embodiment of the invention .
In the Figures : 1 . Positive plate ; 2 . Negative plate ; 3 . Conductive plate ; 4 . Body; 5 . Electrolysis chamber; 51 . Sub-chamber . ut
DETAILED DESCRIPTION
Example embodiments will now be described more completely with reference to the drawings . Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete , and will fully convey the concepts of example embodiments to those skilled in the art . The same reference numerals denote the same or similar structures in the drawings , and thus repeated descriptions of them will be omitted .
The words expressing positions and directions described in the present application are all described with the accompanying drawings as an example , but modifications can also be made on-demand, and those modifications are all included in the scope of the invention .
Referring to Figures 1-4 , the invention provides an electrolyzer with an adj ustable broadband range , comprising : a body 4 , a first electrode plate, a second electrode plate and at least one third electrode plate . The body 4 body has a first end and a second opposite end . A plurality of electrolysis chambers 5 are spaced apart in the body 4 . The electrolytes of each of the electrolysis chambers 5 is connected with each other . A first electrode plate and a second electrode plate are located in the body 4 . The first electrode plate is located between the first end and the electrolysis chamber 5 close to the first end . The second electrode plate is located between the second end and the electrolysis chamber 5 close to the second end . A third electrode plate is located in the body and between two adj acent electrolysis chambers 5 . The first electrode plate, the second electrode plate, and the third electrode plate are either a negative plate 2 or a positive plate 1 . It should be noted that the first end and the second end are both opposite ends of the body 4 . When the body 4 is a rectangular body 4 , the first end is , for example , the left edge of the body 4 , and the second end is the right edge of the body 4 . Two adj acent electrolysis chambers 5 are separated by a first electrode plate or a second electrode plate or a third electrode plate .
Wherein, the polarity of the second electrode plate and the polarity of the third electrode plate are the same and opposite to the polarity of the first electrode plate .
Alternatively, the polarity of the first electrode plate and the polarity of the second electrode plate are the same, there are multiple third electrode plates , and the polarity of some of the third electrode plates is the same as the polarity of the first electrode plate, the polarity of the other third electrode plates is opposite to the polarity of the first electrode plate .
Alternatively, the polarity of the first electrode plate and the polarity of the second electrode plate are the same, there are multiple third electrode plates , and the polarity of the third electrode plates is opposite to the polarity of the first electrode plate .
In the process of producing hydrogen by electrolysis , since the ion concentration per unit volume of the electrolyte will decrease with the progress of hydrogen production by electrolysis , the concentration of hydrogen produced per unit time will decrease . In order to increase the concentration of the produced hydrogen, during production and depending on the power density, a first electrode plate and a third electrode plate , or a second electrode plate and a third electrode plate , or a first electrode plate and a second electrode plate , which have a corresponding spacing and opposite polarities , could be chosen to be connected to the power source so as to form an electric field and concentrate the ions in the electrolyte in the electric field at a certain location . Thus , the purity of the produced hydrogen can still be maintained at a high level even though the ion concentration in the electrolyzer decreases .
With reference to Fig . 1 , the first electrode plate is a negative plate 2 , the second electrode plate and the third electrode plate are positive plates 1 , and a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate . During the production of hydrogen, a negative plate 2 arranged at one end of the electrolyzer is connected to the power source , multiple positive plates 1 are equidistantly distributed on the same side of the negative plate 2 and one of them is chosen to be connected to the power source depending on the current power density in the electrolyzer . As a result, the chosen positive plate cooperates with the negative plate 2 to form an electric field, and the ions are concentrated between this positive plate 1 and this negative plate 2 by the electric field force . The electrolyzer then electrolyzes the electrolyte between the positive plate 1 and the negative plate 2 to produce high-purity hydrogen .
Referring to Fig . 2 , the first electrode plate is a positive plate 1 , the second electrode plate and the third electrode plate are negative plates 2 , and a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate . This arrangement of positive and negative plates is opposite to that of the above example, but the practical implementation thereof is similar : one positive plate 1 is connected to the power source, and one of the negative plates 2 is chosen to be connected to the power source to form an electric field . The ions are concentrated in this electric field by the attraction effect of the electric field force and high-purity hydrogen is produced in the electrolyzer .
In addition, in an electrolysis process , since the ion concentration in the electrolyte will decrease as time lapses , the negative plate 2 and the positive plate 1 that are farthest apart from each other may be connected to the power source initially . A large electric field may be formed between both ends of the electrolyzer to guide the ions to swim in the liquid, so that the rate of hydrogen production with electrolysis is relatively stable . After the electrolysis has been done for a period of time , the ion concentration in the electrolyzer body 4 decreases . We can then j ust adj ust the connected positive plate 1 , i . e . disconnecting the positive plate 1 that was originally connected to the power source and connecting a positive plate 1 that is closer to the negative plate 2 to the power source . This newly connected positive plate 1 cooperates with the fixed negative plate 2 to form an electric field that is smaller than the previous one by a unit spacing . In this way, as the power density in the body 4 gradually decreases , the distance between the negative plate 2 and the positive plate 1 connected to the power source is gradually adj usted, so that the efficiency of hydrogen production and the purity of produced hydrogen can be maintained to the max extent .
Referring to FIG . 3 , among the plurality of third electrode plates , the third electrode plate located in the middle or close to the middle is the positive plate 1 and the rest are negative plates 2 . If the number of the third electrode plates is 2N (N is a natural number) , the positive plate 1 can be two or one of the electrode plates in the middle of the plurality of electrode plates . I f the number of the third electrode plates is 2N+1 , the positive plate 1 is the middle one of the third electrode plates .
Same as the above-mentioned embodiment, during the process of electrolysis , the positive plate 1 and the negative plate 2 may be chosen depending on the power density of the electrolyte in the body 4 to form an electric field of a suitable size , so as to make the purity of hydrogen produced meet the production standards .
Among the plurality of third electrode plates , the third electrode plate located in the middle or close to the middle is the negative plate 2 and the rest are positive plates 1 . If the number of the third electrode plates is 2N (N is a natural number) , the negative plate 2 can be two or one of the electrode plates in the middle of the plurality of electrode plates . I f the number of the third electrode plates is 2N+1 , the negative plate 2 is the middle one of the third electrode plates . Here , the process for choosing the positive plate 1 and the negative plate 2 is no longer detailed .
Further specifically, the electrolysis chamber 5 further comprises a plurality of sub-chambers 51 , the electrolytes of the plurality of sub-chambers 51 are connected with each other, and the plurality of subchambers 51 are electrically connected in parallel in the body 4 and arranged side by side from the first end of the body 4 to the second end of the body 4 . That is , the plurality of sub-chambers 51 of each electrolysis chamber 5 are evenly arranged inside , and the width of a subchamber 51 is 0 . 5-15 cm . It is proved that the subchamber 51 with this range of width can achieve a better hydrogen production rate and purity while occupying less space . The sub-chambers 51 are distributed linearly, and the hydrogen and oxygen produced by each sub-chamber 51 are respectively transported through pipelines and collected in a larger tank for storage after being purified . Comparing to a single electrolyzer, the rate of hydrogen production with multiple sub-chambers 51 is higher
Wherein, the sub-chamber 51 comprises a diaphragm, a first sub-electrode and a second sub-electrode with opposite polarities . The first sub-electrodes and the second sub-electrodes are made of copper or iron, for example . The first sub-electrode and the second subelectrode are electrically connected to the positive pole or negative pole of the power source respectively, acting as the anode and cathode during electrolysis respectively . The diaphragm is located between the first sub-electrode and the second sub-electrode, both the first sub-electrode and the second sub-electrode extend into the same sub-chamber 51 and are used to electrolyze the electrolyte . For example and without limitation, the materials of the diaphragm may be chosen from asbestos , polyester cloth, nylon mesh membrane , bisque firing ceramic plate , polymer anion-cation exchange membrane .
In addition, the electrolyzer further comprises a power source and an ammeter . A plurality of first subelectrodes are connected in parallel to the positive pole of the power source , and a plurality of second subelectrodes are connected in parallel to the negative pole of the power source . The ammeter is connected in series in the circuit loop of the electrolyzer and is used to detect the current of the power source . The ammeter is connected in series in the circuit loop of the power source, the first sub-electrodes of the multiple subchambers 51 are connected in parallel , and the multiple second sub-electrodes are connected in parallel . The ammeter acquires the current consumption of all subchambers 51 . The decrease in the readings of the ammeter indicates the decrease of the power density in the electrolyte . Then, it is necessary to choose another combination of the positive plate 1 and the negative plate 2 to be connected to the power source and adj ust the size of the electric field .
It should be noted that the power source for forming an electric field and the power source for connecting the sub-electrodes to produce hydrogen are preferably different power sources that are independent with each other .
Preferably, the first electrode plate , the second electrode plate and the third electrode plate are respectively provided with conductive plates 3 for externally connecting to a power source . The first electrode plate , the second electrode plate and the third electrode plate are connected to the power source by the corresponding conductive plate 3 , respectively . The first electrode plate , the second electrode plate and the third electrode plate are connected to either end of the electrolysis chamber 5 , respectively, to achieve the functions of enlarging the area of the electric field, guiding the movement of ions , and stably controlling the production rate and the purity of hydrogen .
Although the embodiments of the invention have been shown and described above , it can be understood that the above- mentioned embodiments are exemplary and cannot be construed as limitations of the invention . The above embodiments can be changed, modified, replaced and revised within the scope of the invention by one skilled in the art, without going beyond the principal and aim of the invention . All these modifications shall fall within the protection scope of the claims herewith attached .

Claims

1 . An electrolyzer with an adj ustable broadband range , comprising : a body, the body has a first end and a second opposite end, a plurality of electrolysis chambers being spaced apart in the body; a first electrode plate and a second electrode plate located in the body, the first electrode plate is located between the first end and the electrolysis chamber close to the first end, and the second electrode plate is located between the second end and the electrolysis chamber close to the second end, characterized in that it further comprises at least one third electrode plate located in the body and between two adj acent electrolysis chambers , the first electrode plate, the second electrode plate , and the third electrode plate are either a negative plate or a positive plate ; wherein the polarity of the second electrode plate and the polarity of the third electrode plate are the same and opposite to the polarity of the first electrode plate ; or, the polarity of the first electrode plate and the polarity of the second electrode plate are the same , there are multiple third electrode plates , and the polarity of some of the third electrode plates is the same as the polarity of the first electrode plate, the polarity of the other third electrode plates is opposite to the polarity of the first electrode plate ; or, the polarity of the first electrode plate and the polarity of the second electrode plate are the same, there are multiple third electrode plates , and the polarity of the third electrode plates is opposite to the polarity of the first electrode plate .
2 . The electrolyzer according to claim 1 , wherein the first electrode plate is a negative plate , the second electrode plate and the third electrode plate are positive plates , and a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate .
3 . The electrolyzer according to claim 1 , wherein the first electrode plate is a positive plate , the second electrode plate and the third electrode plate are negative plates , and a plurality of the third electrode plates are equidistantly spaced apart between the first electrode plate and the second electrode plate .
4 . The electrolyzer according to claim 1 , wherein among the plurality of third electrode plates , the third electrode plate located in the middle or close to the middle is the positive plate and the rest are negative plates .
5 . The electrolyzer according to claim 1 , wherein among the plurality of third electrode plates , the third electrode plate located in the middle or close to the middle is the negative plate and the rest are positive plates .
6 . The electrolyzer according to any one of claims 1-5 , wherein the electrolysis chamber further comprises a plurality of sub-chambers , the electrolytes of the plurality of sub-chambers are connected with each other, and the plurality of sub-chambers are electrically connected in parallel in the body and arranged side by side from the first end of the body to the second end of the body .
7 . The electrolyzer according to claim 6 , wherein the sub-chamber comprises a diaphragm, a first sub-electrode and a second sub-electrode with opposite polarities , and the diaphragm is located between the first sub-electrode and the second sub-electrode , both the first subelectrode and the second sub-electrode extend into the same sub-chamber and are used to electrolyze the electrolyte .
8 . The electrolyzer according to claim 7 , further comprising a power source and an ammeter, a plurality of first sub-electrodes being connected in parallel to the positive pole of the power source , a plurality of second sub-electrodes being connected in parallel to the negative pole of the power source, the ammeter being connected in series in the circuit loop of the electrolyzer and being used to detect the current of the power source ; the first sub-electrodes and the second sub-electrodes are made of copper or iron, and the electrolyte in the electrolyzer is lye .
9 . The electrolyzer according to claim 6 , characterized in that the width of the sub-chamber is 0 . 5-15 cm .
10 . The electrolyzer according to claim 1 , characterized in that the first electrode plate , the second electrode plate and the third electrode plate are respectively provided with conductive plates for externally connecting to an power source .
PCT/EP2023/084020 2022-12-02 2023-12-01 Electrolyzer with an adjustable broadband range WO2024115782A1 (en)

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CN202223238170.2 2022-12-02
CN202223238170.2U CN219260204U (en) 2022-12-02 2022-12-02 Broadband-adjustable electrolytic tank

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Citations (4)

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Publication number Priority date Publication date Assignee Title
US20140090986A1 (en) * 2011-05-23 2014-04-03 Gary J. Bethurem Combustible fuel and apparatus and process for creating the same
CN213013120U (en) * 2020-06-15 2021-04-20 中船重工（邯郸）派瑞特种气体有限公司 Electrochemical fluorination series electrolytic cell
CN214361731U (en) * 2020-12-28 2021-10-08 辽宁铭鑫环境工程有限公司 Ion waste liquid diaphragm electrolytic device
CN114574887A (en) * 2022-03-17 2022-06-03 阳光氢能科技有限公司 Electrolytic cell polar plate and electrolytic cell

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140090986A1 (en) * 2011-05-23 2014-04-03 Gary J. Bethurem Combustible fuel and apparatus and process for creating the same
CN213013120U (en) * 2020-06-15 2021-04-20 中船重工（邯郸）派瑞特种气体有限公司 Electrochemical fluorination series electrolytic cell
CN214361731U (en) * 2020-12-28 2021-10-08 辽宁铭鑫环境工程有限公司 Ion waste liquid diaphragm electrolytic device
CN114574887A (en) * 2022-03-17 2022-06-03 阳光氢能科技有限公司 Electrolytic cell polar plate and electrolytic cell

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