EP1242653B1 - Elektrochemische zelle für elektrolyseure mit einzelelementtechnik - Google Patents

Elektrochemische zelle für elektrolyseure mit einzelelementtechnik Download PDF

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Publication number
EP1242653B1
EP1242653B1 EP00976055A EP00976055A EP1242653B1 EP 1242653 B1 EP1242653 B1 EP 1242653B1 EP 00976055 A EP00976055 A EP 00976055A EP 00976055 A EP00976055 A EP 00976055A EP 1242653 B1 EP1242653 B1 EP 1242653B1
Authority
EP
European Patent Office
Prior art keywords
electrochemical cell
supporting
cathode
chamber
cell according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00976055A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1242653A1 (de
Inventor
Fritz Gestermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Covestro Deutschland AG
Original Assignee
Bayer MaterialScience AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer MaterialScience AG filed Critical Bayer MaterialScience AG
Publication of EP1242653A1 publication Critical patent/EP1242653A1/de
Application granted granted Critical
Publication of EP1242653B1 publication Critical patent/EP1242653B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C25B9/63—Holders for electrodes; Positioning of the electrodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells

Definitions

  • the invention relates to an electrochemical cell for electrolysers with single element technology for the membrane electrolysis process according to the preamble of Claim 1.
  • the cell consists of at least two half-shells, the Anolyteraum and surrounding a cathode compartment with membrane therebetween, an anode in the anolyte compartment, the cathode compartment being equipped with an oxygen-consuming cathode, with several pressure-compensated gas pockets arranged one above the other, a Katholytspalt and optionally a rear space is provided, wherein electrically conductive support elements in the Anolyteraum and supporting elements in the cathode compartment are provided on the same opposite position.
  • Electrolyzers e.g. for the NaCl electrolysis are in bipolar mode in two known basic techniques known.
  • the cell elements within the frame are half-shelled Back-to-back welded, with anode and cathode each freestanding lie outside and inserted between two elements ion exchange membrane forms the electrochemical cell.
  • the flow from cell to cell flows here over the welds between the half-shells.
  • the electrochemical cell is separated by two Half shells, between which a membrane is placed, and then to a single element are screwed formed.
  • the electrical contact From single element to single element is done here by compressing a Packages of individual elements electrically connected to each other via suitable contact strips get connected.
  • the externally acting pressing forces must be within the element structures are forwarded.
  • the gas pockets with the oxygen-consuming cathodes usually extend over the entire width of the electrolytic cell.
  • the structures for the passage of the clamping forces are like hydrogen-producing electrolysis for hydraulic reasons arranged vertically.
  • For the here intersecting functions had to be a pragmatic Simple solution can be found in both new electrolysis elements of be integrated in advance, as well as a retrofit of currently in the Hydrogen operation working electrolysis allows.
  • an electrochemical cell for the Membrane electrolysis process consisting of at least 2 half-shells, the one Anolyte space and a cathode space surrounded with membrane arranged between them, an anode in the anolyte compartment, the cathode compartment being equipped with an oxygen-consuming cathode, with a plurality of pressure-compensated gas pockets arranged one above the other, one Katholytspalt and optionally a rear space is provided, characterized electrically conductive support elements in the anolyte space and support elements in the Cathode space are provided on the same opposite position, which support each other, wherein the support in the cathode compartment by means of a multi-part support element is carried out with a support member in Katholytspalt, another Support member in the gas pocket, which at selected locations, especially in the upper and lower portion of the respective gas pocket breakthroughs or passages (has, and in the presence of a back space a third support member in the rear space behind the Gas bags
  • the back of the gas pockets is in particular with the vertical support elements for Power and power transmission welded.
  • the vertical support elements for Power and power transmission welded are preferred over this Welds, for example, structural beams or other types of vertical Structural bridges welded as support elements, which are so high that they with the surrounding outer edge of the gas pocket have the same level.
  • these fixtures must be a horizontal Gas flow through the gas pocket and at the bottom also a horizontal Allow drainage of possible condensate.
  • the oxygen-consuming cathodes After installation of the oxygen-consuming cathodes, for example, they lie flat on the Structural beams or bridges and the edge of the gas pockets on and form a level Surface across the full width and the respective height of the gas pocket.
  • a support element as a support element of electrolyte and heat-resistant material as a counterpart to the o.g. Structural beams or bridges built on the one hand on the oxygen-consuming cathode and on the other hand the membrane is supported on the anode structure also supported in this area and so allows the passage of power through the electrochemical cell.
  • the support member (spacer) is preferably not in one for the following reasons Piece installed in the cell.
  • the second support part is particularly preferably either as a solid electrically conductive Ingot or formed as a U-profile, or as a corresponding vertical embossment of Rear side of the gas pocket executed. Out For this reason, it is advantageous to piece the support element and into segments subdivide, which correspond to the height of the respective individual gas pockets.
  • the segments The support elements are in particular the top and bottom of the following Scheme attached or guided: at the top they are at the edge of the gas pocket attached. This can either be via a pin or a push-button type either on Spacers or at the top of the gas pocket done, with each opposite part must contain a corresponding hole.
  • a preferred variant of the invention is therefore characterized in that the support member in the Katholytspalt of several vertically stacked Ingot is formed, optionally at its upper end with a detachable Connecting means, for example a snap connector attached to cross struts are who carry the electrode.
  • the tapered upper end of the underlying next support element encloses and so ensures the horizontal positioning of the support element.
  • the gap between these two segments is expediently so chosen that the greater thermal expansion of the support element over the metallic structures is compensated.
  • each adjacent ends of the support members formed as a groove-spring combination, wherein the upper end of each lower support member is formed in particular as a spring.
  • the Structural beams or bridges with slight vertical bulges either to the right and left or in the middle are provided, which a corresponding shaping of the Support elements corresponds, so that this always when clamping the electrolyzer is centered again on the opposite structure.
  • the oxygen-consuming cathode should in particular be electrically conductive on its rear side be.
  • the edge of the gas pocket another electrical connection by press contact created the electrically conductive support elements, which to further minimize the ohmic losses leads.
  • the use of the support element prevents a large-scale bulging of the oxygen-consuming cathode in the Katholytspalt with the Risk of local blockage of the catholyte through contact with the membrane. This applies in particular to the o.g. Structuring of the supporting elements through which the Oxygen consumption cathode is stretched.
  • the supporting elements in the Katholytspalt be particularly in the case of Chloralkalielektrolyse suitably made of ECTFE, FEP, MFA or PFA, while the electrically conductive support elements, for example, structural beams or bridges made of nickel or another non-sag metal alloy, or directly are stamped out of the back wall of the gas pocket.
  • the support elements in the catholyte gap on the oxygen-consuming cathode facing side to be metallic over the press contact an improvement of the current distribution into the oxygen-consuming cathode receive.
  • the support elements are two-layered constructed, with the membrane-facing side of ECTFE, FEP, MFA or PFA consists, while the metallic part consists of alkali-resistant metal.
  • FIG 1 the view of the cathode half-shell with the left upper corner than Section shown in Figure 2 is a horizontal section A-A 'through a gas pocket 15th In the cathode half shell 10, the gas pocket structure with the rear wall 11 and the lateral border 9 carried on the support structure 3.
  • the vertical structural beam 2a or, according to one in the same Fig. 2 and 3, respectively shown variant, the vertical structural bridge 2b are welded into the gas pocket 15.
  • both structures are broken and do not stand on the horizontal boundary 12 the gas pocket 15 on to drain any accumulating condensate to allow the oxygen-consuming cathode.
  • the oxygen-consuming cathode 4 is on and on the lateral border 9 and the horizontal boundary 12 electrically attached conductive and gas-tight and rests on the structural beam or bridges.
  • the Katholytspalt 14 between membrane 5 and oxygen-consuming cathode 4 is defined by the spacer elements 1, which in turn via the membrane on the Support anode 6, which defines in the anode half-shell 8 on the support structure 7 is held (see Fig.2).
  • Anode half-shell 8 and cathode half-shell 10 are liquid-tight with each other connected and form a single element (electrolysis cell). When squeezing the electrolyzer compresses many such individual elements, wherein the respective next anode half-shell 8 'of adjacent individual elements on the Cathode half-shell 10 and the next cathode half-shell 10 'of an adjacent Single element on the other side of the single element on the anode half-shell 8 Press.
  • the spacer elements 1a, 1b themselves are tapered at the top and below provided with a corresponding dovetail structure (Fig. 1). you will be above with a pin or a push-button-like holding device 13 on the horizontal boundary 12 of the gas pocket 15 attached.
  • the dovetail of the Spacer 1b engages over the top of the next below Distance element 1a and is so clearly positioned. At the same time allows one defined gap between the spacer elements 1a, 1b whose free thermal Expansion, which, due to the material, is greater than that of the metallic structures.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Secondary Cells (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
EP00976055A 1999-12-01 2000-11-20 Elektrochemische zelle für elektrolyseure mit einzelelementtechnik Expired - Lifetime EP1242653B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19959079A DE19959079A1 (de) 1999-12-01 1999-12-01 Elektrochemische Zelle für Elektrolyseure mit Einzelelementtechnik
DE19959079 1999-12-01
PCT/EP2000/011531 WO2001040549A1 (de) 1999-12-01 2000-11-20 Elektrochemische zelle für elektrolyseure mit einzelelementtechnik

Publications (2)

Publication Number Publication Date
EP1242653A1 EP1242653A1 (de) 2002-09-25
EP1242653B1 true EP1242653B1 (de) 2005-04-06

Family

ID=7931798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00976055A Expired - Lifetime EP1242653B1 (de) 1999-12-01 2000-11-20 Elektrochemische zelle für elektrolyseure mit einzelelementtechnik

Country Status (22)

Country Link
US (1) US6984296B1 (hu)
EP (1) EP1242653B1 (hu)
JP (1) JP2003515677A (hu)
KR (1) KR20020059830A (hu)
CN (1) CN1258619C (hu)
AT (1) ATE292695T1 (hu)
AU (1) AU775645B2 (hu)
BR (1) BR0015952A (hu)
CA (1) CA2394835A1 (hu)
CZ (1) CZ20021886A3 (hu)
DE (2) DE19959079A1 (hu)
ES (1) ES2240198T3 (hu)
HK (1) HK1054412A1 (hu)
HU (1) HUP0203519A3 (hu)
MX (1) MXPA02005480A (hu)
NO (1) NO20022575L (hu)
PL (1) PL355720A1 (hu)
PT (1) PT1242653E (hu)
RU (1) RU2002118331A (hu)
WO (1) WO2001040549A1 (hu)
YU (1) YU39402A (hu)
ZA (1) ZA200203202B (hu)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20021524A1 (it) * 2002-07-11 2004-01-12 De Nora Elettrodi Spa Cella con elettrodo a letto in eruzione per elettrodeposiwione di metalli
JP4899294B2 (ja) * 2004-06-10 2012-03-21 株式会社日立製作所 水素燃料製造システム，水素燃料製造方法および水素燃料製造プログラム
DE102005003527A1 (de) * 2005-01-25 2006-07-27 Uhdenora S.P.A. Elektrolysezelle mit erweiterter aktiver Membranfläche
IT1391774B1 (it) * 2008-11-17 2012-01-27 Uhdenora Spa Cella elementare e relativo elettrolizzatore modulare per processi elettrolitici
DE102020206448A1 (de) 2020-05-25 2021-11-25 Siemens Aktiengesellschaft Vorrichtung zum Befestigen einer Elektrode
DE102020206449A1 (de) 2020-05-25 2021-11-25 Siemens Aktiengesellschaft Verfahren zum Befestigen einer Elektrode

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3655167A (en) * 1970-08-18 1972-04-11 Peter W Skille Fence corner
DE4444114C2 (de) 1994-12-12 1997-01-23 Bayer Ag Elektrochemische Halbzelle mit Druckkompensation
DE19622744C1 (de) 1996-06-07 1997-07-31 Bayer Ag Elektrochemische Halbzelle mit Druckkompensation
DE19641125A1 (de) 1996-10-05 1998-04-16 Krupp Uhde Gmbh Elektrolyseapparat zur Herstellung von Halogengasen
DE19715429A1 (de) * 1997-04-14 1998-10-15 Bayer Ag Elektrochemische Halbzelle
DE19859882A1 (de) * 1998-12-23 1999-12-09 W Strewe Ionenaustauschermembranzelle für hohe Produktleistungen
US6283162B1 (en) * 1999-09-09 2001-09-04 Boyd L. Butler Thin boom tube exhaust pipes, method of sheet metal construction thereof, and exhaust systems which utilize such exhaust pipes for increased ground clearance on race cars

Also Published As

Publication number Publication date
KR20020059830A (ko) 2002-07-13
NO20022575D0 (no) 2002-05-30
CA2394835A1 (en) 2001-06-07
HK1054412A1 (zh) 2003-11-28
ATE292695T1 (de) 2005-04-15
HUP0203519A2 (hu) 2003-03-28
PL355720A1 (en) 2004-05-17
DE50010013D1 (de) 2005-05-12
EP1242653A1 (de) 2002-09-25
PT1242653E (pt) 2005-08-31
CN1258619C (zh) 2006-06-07
AU775645B2 (en) 2004-08-12
MXPA02005480A (es) 2002-12-13
US6984296B1 (en) 2006-01-10
RU2002118331A (ru) 2004-03-27
ZA200203202B (en) 2003-04-23
ES2240198T3 (es) 2005-10-16
AU1396001A (en) 2001-06-12
JP2003515677A (ja) 2003-05-07
CZ20021886A3 (cs) 2002-10-16
WO2001040549A1 (de) 2001-06-07
BR0015952A (pt) 2002-08-06
NO20022575L (no) 2002-05-30
DE19959079A1 (de) 2001-06-07
HUP0203519A3 (en) 2003-04-28
YU39402A (sh) 2004-12-31
CN1408032A (zh) 2003-04-02

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