WO2014075741A1 - Pem-type electrolyzer stack for operation at high pressure - Google Patents
Pem-type electrolyzer stack for operation at high pressure Download PDFInfo
- Publication number
- WO2014075741A1 WO2014075741A1 PCT/EP2012/072982 EP2012072982W WO2014075741A1 WO 2014075741 A1 WO2014075741 A1 WO 2014075741A1 EP 2012072982 W EP2012072982 W EP 2012072982W WO 2014075741 A1 WO2014075741 A1 WO 2014075741A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- titanium
- accordance
- electrolyzer
- water
- stack
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000005868 electrolysis reaction Methods 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 18
- 238000009826 distribution Methods 0.000 claims description 9
- 239000001257 hydrogen Substances 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 7
- 229910052719 titanium Inorganic materials 0.000 claims 7
- 239000010936 titanium Substances 0.000 claims 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 3
- 229910052799 carbon Inorganic materials 0.000 claims 3
- 239000002131 composite material Substances 0.000 claims 3
- 239000004809 Teflon Substances 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 claims 1
- 238000000034 method Methods 0.000 description 8
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000009827 uniform distribution Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
-
- 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
- a PEM Electrolysis module is a filter- pressure design (STACK) collected from the cells, sandwiched between the end plates with bolts.
- An Electrolyzer has an internal communication system associated with the external system of water regime providing and gas separators. Internal communication is facilitated by channels that are formed by the connections of individual parts by doing in these parts a number of coaxial holes. Elements of the cells are sealed with gaskets from made of fluorine rubber.
- Hydrogen occurrence in oxygen may in some cases accompanied by decreasing of a current efficiency (up to 50% at smaller currents) relative to theoretical value, which is obtained at the assumption of losses from a crossover.
- processes, which lead to hydrogen formation in anode area may be electrochemical character and directly accompany anode processes of water decomposition.
- Hydrogen concentration in electrolytic oxygen cannot be caused only membranes gas permeability; It is possible that the hydrogen in electrolyzer anode space is formed as a result of electrochemical processes directly in anode catalyst layer or corrosion processes on electrolyzer design elements. It should be noted that the specific reasons for such processes to the end and not yet clarified the issue continues to be relevant.
- Uniform distribution of water on the active surface of the cell provides a uniform release rate of electrolysis gases formation. This eliminates the possibility of the formation of stagnant zones, and increases efficiency and life of work, improves the purity of electrolysis gases and prevents accidents related to local heat, causing destruction of the elements of MEA.
- the minimum contact resistance of electrolysis cell design elements at operating conditions provides the best electrical characteristics of the cell and, consequently, increases its efficiency as a whole.
- Fig.1 Shows the electrolysis module in the backpressure case where the
- electrolyzer stack is located.
- Fig. 2 Shows the end plate with a handing out channels to be implemented in the present invention
- Fig. 3. Shows a gasket with the holes and channels with conical to be implemented in the present invention
- Fig. 4. Is a representation of a mesh insert to be implemented in the present invention
- Fig. 5. Show the mesh insert with dividing walls to be implemented in the present invention.
- the invention is related to several improvements in the design and construction of components and manufacture techniques of the PEM electrolyzer stack components that solve the majority of the technical issues that have influence in the gas production at high pressures up to 500 bars.
- the invention provides a PEM electrolyzer working at high pressure, placed in a backpressure case (fig.1).
- the case is filled by an inert gas (or hydrogen) at pressure, which corresponds to the pressure inside the electrolyzer.
- This design and operating mode has been described in our Patent P200900163.
- the invention presents an end plate with milled grooves, (fig. 2) with this end plate design, distribution and collection of reagents is performed from the two sides of the plate.
- the invention presents in a particular embodiment, a configuration of the gaskets with conical windows for inserts of a conical shape, (fig. 3).
- the configuration of distributing holes in gaskets depends on the amount of generated gas (ie, the number of cells in the electrolysis module and pressure) can be made from two to eight over-sized holes.
- the invention is provided with slotted holes that form additional cross- cutting channels.
- additional cross- cutting channels To reduce dead zones, two to four channels , depending on the amount of generated gases, for distribution and collection reagents are provided, and the holes have a shape such as to direct the flow towards the gaskets corners. (fig.3)
- the inner corners of the gasket windows are rounded, with a predetermined curvature radius
- Deposition of the catalytic layer directly on the membrane results in improvements in the homogeneity of the catalytic layer's structure, highly degree of purity of reagents and materials, specially when the process is carried on with a current density of 1 A/cm 2 and voltage lowered to 100mV for the cell, or at a current density of 2A/cm 2 - for 200mV. Hydrogen concentration in electrolytic oxygen falls under this conditions approximately a 10%.
- the first and third layer of the grids are immediately rolled "in size” and have a smooth surface, and the second layer, located between them, has a different thickness without smooth surfaces After welding of the grid layers "rolled on rollers to the desired size", which allows improving the contact resistance between the layers of grids and reduces the contact resistances.
- we reduce the contact electrical resistance of the electrolysis cell construction is reduced from 25 mQ/cm 2 to 15 mQ/cm 2 , which corresponds to the decrease in cell voltage at a current of 1 A/ cm 2 at 10 mV.
- FIG. 5 Another variant of the mesh inserts construction described above (fig.5) may be with dividing walls for optimization of water distribution. The presence of walls directs the water flow to the right direction and eliminates the appearance of stagnant zones. This design is more effective in cells with a large work surface.
- fig 6. is presented the scheme of water and gas flows inside the electrolysis stack manufactured with the elements of the present invention. Water is supplied to the anode channel through 3 lower front flange fittings,. After that, water is decomposed on the membrane and oxygen and part of remaining water passes to the rear end plate at its upper part, and through channels made in the end plate, turns to the side of the front flange and is expelled through two upper lateral connections.
Landscapes
- 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
Electrolyzer module comprising a front plate, end plate enclosing an anode cavity, and a cathode cavity.
Description
PEM-TYPE ELECTROLYZER STACK FOR OPERATION AT HIGH PRESSURE
FIELD OF THE INVENTION A PEM Electrolysis module is a filter- pressure design (STACK) collected from the cells, sandwiched between the end plates with bolts. An Electrolyzer has an internal communication system associated with the external system of water regime providing and gas separators. Internal communication is facilitated by channels that are formed by the connections of individual parts by doing in these parts a number of coaxial holes. Elements of the cells are sealed with gaskets from made of fluorine rubber.
STATE OF THE ART The improvement and optimization of a PEM electrolyzer efficiency and operative life operating at high pressures is linked to the following:
• Membranes with low ion-exchange capacity
• The technology of the MEA manufacturing with structural improvements in order to increase contact with the current collectors.
• Optimization of the mesh elements design, gaskets, bipolar plates, as well as system of supply and distribution of reagents to the cell contours.
• Providing a more uniform distribution of water on the active surface of the electrolyzer cells
• Providing rapid removal of electrolysis gases from the cathode and anode spaces.
• Providing a minimum electrical contact resistance of electrolysis cell elements and minimum degradation
Hydrogen occurrence in oxygen may in some cases accompanied by decreasing of a current efficiency (up to 50% at smaller currents) relative to theoretical value, which is obtained at the assumption of losses from a crossover. Hence, processes, which lead to hydrogen formation in anode area, may be electrochemical character
and directly accompany anode processes of water decomposition. Hydrogen concentration in electrolytic oxygen cannot be caused only membranes gas permeability; It is possible that the hydrogen in electrolyzer anode space is formed as a result of electrochemical processes directly in anode catalyst layer or corrosion processes on electrolyzer design elements. It should be noted that the specific reasons for such processes to the end and not yet clarified the issue continues to be relevant.
Uniform distribution of water on the active surface of the cell provides a uniform release rate of electrolysis gases formation. This eliminates the possibility of the formation of stagnant zones, and increases efficiency and life of work, improves the purity of electrolysis gases and prevents accidents related to local heat, causing destruction of the elements of MEA.
Quickly remove of electrolysis gases from the cathode and anode spaces provides increased water content in the cathode and the anode space of the electrolyzer, which contributes to improving the efficiency of electrolysis.
The minimum contact resistance of electrolysis cell design elements at operating conditions provides the best electrical characteristics of the cell and, consequently, increases its efficiency as a whole.
For obtain of pure electrolytic gases it is necessary to improve MEA manufacturing techniques (improve the homogeneity of the catalytic layers structure, clarification of requirements for the degree of
Dependence of membrane gas permeability from temperature has exponential increase and increases approximately by 5 times at increase temperature from 40°C to 80°C while hydrogen concentration in anode area almost does not depend from temperature.
BRIEF DESCRIPTION OF THE DRAWINGS
To complete the description and in order to provide for a better understanding of the invention, a set of drawings is provided. Said drawings illustrate a preferred embodiment of the invention, which should not be interpreted as restricting the
scope of the invention, but just as an example of how the invention can be embodied.
Fig.1 Shows the electrolysis module in the backpressure case where the
electrolyzer stack, is located.
Fig. 2 Shows the end plate with a handing out channels to be implemented in the present invention
Fig. 3. Shows a gasket with the holes and channels with conical to be implemented in the present invention
Fig. 4. Is a representation of a mesh insert to be implemented in the present invention
Fig. 5. Show the mesh insert with dividing walls to be implemented in the present invention.
Fig .6. Show the water and gases flows in the electrolisis stack with the components of the present invention
DESCRIPTION OF THE INVENTION The invention is related to several improvements in the design and construction of components and manufacture techniques of the PEM electrolyzer stack components that solve the majority of the technical issues that have influence in the gas production at high pressures up to 500 bars. The invention provides a PEM electrolyzer working at high pressure, placed in a backpressure case (fig.1). The case is filled by an inert gas (or hydrogen) at pressure, which corresponds to the pressure inside the electrolyzer. This design and operating mode has been described in our Patent P200900163.
Because the distribution and collection of reagents in the electrolysis module is made from the front side, there is a need to direct flows towards the rear of the electrolysis module. To do this, the invention presents an end plate with milled grooves, (fig. 2) with this end plate design, distribution and collection of reagents is performed from the two sides of the plate.
In order to obtain a more uniform distribution of water on the active surface of the cell and more efficient removal of electrolysis gases from the cathode and anode space by optimization of sizes, amount and configuration of the input and output of gases and water, the invention presents in a particular embodiment, a configuration of the gaskets with conical windows for inserts of a conical shape, (fig. 3). The configuration of distributing holes in gaskets, depends on the amount of generated gas (ie, the number of cells in the electrolysis module and pressure) can be made from two to eight over-sized holes. The size of the slot channels of the upper and lower inserts made different: in the upper groove gasket are installed inserts with E = 1 .00 mm tp 2,8 mm, in the lower grooves are installed inserts with E = 0,70 mm to 1 .50 mm. This allows to provide the necessary backpressure to improve the uniformity of reagents and flow distribution on the cross sections of electrolysis cells.
To provide uniform water distribution in the inner cavities of the electrolysis module cells and to reduce the "stagnant" zones in gasket construction in a particular embodiment, the invention is provided with slotted holes that form additional cross- cutting channels. To reduce dead zones, two to four channels , depending on the amount of generated gases, for distribution and collection reagents are provided, and the holes have a shape such as to direct the flow towards the gaskets corners. (fig.3)
To reduce corrosion at the center of the bipolar plates and the corners of porous current collectors, the inner corners of the gasket windows are rounded, with a predetermined curvature radius
Deposition of the catalytic layer directly on the membrane results in improvements in the homogeneity of the catalytic layer's structure, highly degree of purity of reagents and materials, specially when the process is carried on with a current density of 1 A/cm2 and voltage lowered to 100mV for the cell, or at a current density of 2A/cm2- for 200mV. Hydrogen concentration in electrolytic oxygen falls under this conditions approximately a 10%.
In order to lower the electrical contact resistance of the mesh inserts of the electrolyzer (fig. 4)
The first and third layer of the grids are immediately rolled "in size" and have a smooth surface, and the second layer, located between them, has a different thickness without smooth surfaces After welding of the grid layers "rolled on rollers to the desired size", which allows improving the contact resistance between the layers of grids and reduces the contact resistances. With the use of this technology object of the invention we reduce the contact electrical resistance of the electrolysis cell construction is reduced from 25 mQ/cm2 to 15 mQ/cm2, which corresponds to the decrease in cell voltage at a current of 1 A/ cm2 at 10 mV.
Another variant of the mesh inserts construction described above (fig.5) may be with dividing walls for optimization of water distribution. The presence of walls directs the water flow to the right direction and eliminates the appearance of stagnant zones. This design is more effective in cells with a large work surface. In fig 6. is presented the scheme of water and gas flows inside the electrolysis stack manufactured with the elements of the present invention. Water is supplied to the anode channel through 3 lower front flange fittings,. After that, water is decomposed on the membrane and oxygen and part of remaining water passes to the rear end plate at its upper part, and through channels made in the end plate, turns to the side of the front flange and is expelled through two upper lateral connections. Water is supplied through 2 bottom side connections to the cathode cavity of the electrolysis stack ,then passes to the back plate where the flow turns in the opposite direction and is distributed over the cathode cavity. The resulting decomposition hydrogen input into the upper hole of the electrolyzer stack components and comes out through the top 3 fittings in the front flange.
Claims
1 . -PEM Electrolyzer stack in which the water is supplied to the anode cavity through 3 lower front flange fittings,. After that, water is decomposed on the membrane and oxygen and part of remaining water, passes to the rear end plate at its upper part, and through channels made in the end plate, turns to the side of the front flange and is expelled through two upper lateral connections. Water is supplied through 2 bottom side connections to the cathode cavity of the electrolysis stack, and then passes to the back plate where the flow turns in the opposite direction and is distributed over the cathode cavity. The resulting decomposition hydrogen flows into the upper hole of the electrolyzer stack components and comes out through the top 3 fittings in the front flange, (fig 6) .
2. - PEM Electrolyzer stack in accordance with claim 1. further comprising gaskets made of Fluor rubber or with Fluor rubber with a cover of Teflon film, the gaskets further comprising windows, slots and channels at their sides with conical windows for inserts of a conical shape, each channel having 3 distributing holes, the wholes being of a bigger size as the windows, the configuration of number of distributing holes, depends on the amount of generated gases and can be from two to eight. The size of the slot channels of the upper and lower inserts have different size: in the upper groove gasket inserts with E = 1 .00 mm tp 2,8 mm, in the lower grooves inserts with E = 0,70 mm to 1 .50 mm. (fig 3),
3. - PEM Electrolyzer Stack in accordance with any of the previous claims in which the end plates made with titanium with milled grooves.(fig 2) 4.- PEM Electrolyzer module in accordance with any of the previous Claims , Claim
1 . in which Gas Distribution layers made with Titanium or Composites of Titanium and Carbon in the cathode region, in which the first and third grids layer immediately rolled "in size" and have a smooth surface and a second layer, located between the two, has a margin thickness,
(fig 4)
5.- Electrolyzer module in accordance with Claim 4. in which Gas Distribution layers incorporated dividing walls (fig.5)
6- Electrolyzer module in accordance with any of the previous claims, further comprising current collectors and bipolar plates made with titanium or Composites of Titanium and Carbon which present a curvature radius on the inner corner.
7.- Electrolyzer module in accordance with any of the previous claims , in which the bipolar plates made with titanium or Composites of Titanium and Carbon have a curvature radius on the inner corner.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2012/072982 WO2014075741A1 (en) | 2012-11-19 | 2012-11-19 | Pem-type electrolyzer stack for operation at high pressure |
| US14/443,174 US20150329977A1 (en) | 2012-11-19 | 2012-11-19 | Pem-type electrolyzer stack for operation at high pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2012/072982 WO2014075741A1 (en) | 2012-11-19 | 2012-11-19 | Pem-type electrolyzer stack for operation at high pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014075741A1 true WO2014075741A1 (en) | 2014-05-22 |
Family
ID=47263269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2012/072982 WO2014075741A1 (en) | 2012-11-19 | 2012-11-19 | Pem-type electrolyzer stack for operation at high pressure |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20150329977A1 (en) |
| WO (1) | WO2014075741A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK178317B1 (en) * | 2014-09-05 | 2015-11-30 | Greenhydrogen Dk Aps | Electrolyser Stack Divided into Sub-stacks |
| CN110023543A (en) * | 2017-02-23 | 2019-07-16 | 川崎重工业株式会社 | The operation method of water electrolysis system and water electrolysis system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105121710B (en) * | 2013-04-30 | 2018-01-30 | 旭化成株式会社 | Pad and electrolytic cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0229473A1 (en) * | 1985-12-16 | 1987-07-22 | Imperial Chemical Industries Plc | Electrode |
| US4720331A (en) * | 1986-03-27 | 1988-01-19 | Billings Roger E | Method and apparatus for electrolyzing water |
| US5401371A (en) * | 1992-07-16 | 1995-03-28 | Aisin Seiki Kabushiki Kaisha | Hydrogen generator |
| DE102009044144A1 (en) * | 2009-09-30 | 2011-04-07 | Alfred Walther Metallwarenfabrikation-Kunsthandwerk E.K. | Electrolysis device for producing gases from water, comprises a housing made of plastic or other insulating material, having vertically arranged plate electrodes and cells in which each cell has a housing frame made from plastic |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2911381B2 (en) * | 1995-03-01 | 1999-06-23 | 神鋼パンテツク株式会社 | Hydrogen / oxygen generator |
| US8282811B2 (en) * | 2001-08-29 | 2012-10-09 | Giner Electrochemical Systems, Llc | Method and system for producing high-pressure hydrogen |
-
2012
- 2012-11-19 US US14/443,174 patent/US20150329977A1/en not_active Abandoned
- 2012-11-19 WO PCT/EP2012/072982 patent/WO2014075741A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0229473A1 (en) * | 1985-12-16 | 1987-07-22 | Imperial Chemical Industries Plc | Electrode |
| US4720331A (en) * | 1986-03-27 | 1988-01-19 | Billings Roger E | Method and apparatus for electrolyzing water |
| US5401371A (en) * | 1992-07-16 | 1995-03-28 | Aisin Seiki Kabushiki Kaisha | Hydrogen generator |
| DE102009044144A1 (en) * | 2009-09-30 | 2011-04-07 | Alfred Walther Metallwarenfabrikation-Kunsthandwerk E.K. | Electrolysis device for producing gases from water, comprises a housing made of plastic or other insulating material, having vertically arranged plate electrodes and cells in which each cell has a housing frame made from plastic |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK178317B1 (en) * | 2014-09-05 | 2015-11-30 | Greenhydrogen Dk Aps | Electrolyser Stack Divided into Sub-stacks |
| CN110023543A (en) * | 2017-02-23 | 2019-07-16 | 川崎重工业株式会社 | The operation method of water electrolysis system and water electrolysis system |
Also Published As
| Publication number | Publication date |
|---|---|
| US20150329977A1 (en) | 2015-11-19 |
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