EP0051845A1 - Cellule d'électrolyse avec compartiment intermédiaire traversé par l'électrolyte et structure convenable pour un tel compartiment - Google Patents

Cellule d'électrolyse avec compartiment intermédiaire traversé par l'électrolyte et structure convenable pour un tel compartiment Download PDF

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Publication number
EP0051845A1
EP0051845A1 EP81109469A EP81109469A EP0051845A1 EP 0051845 A1 EP0051845 A1 EP 0051845A1 EP 81109469 A EP81109469 A EP 81109469A EP 81109469 A EP81109469 A EP 81109469A EP 0051845 A1 EP0051845 A1 EP 0051845A1
Authority
EP
European Patent Office
Prior art keywords
ion exchange
separators
intermediate chamber
cell according
support structure
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.)
Granted
Application number
EP81109469A
Other languages
German (de)
English (en)
Other versions
EP0051845B1 (fr
Inventor
Bernd Dieter Dr. Struck
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.)
Forschungszentrum Juelich GmbH
Original Assignee
Forschungszentrum Juelich GmbH
Kernforschungsanlage Juelich GmbH
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
Priority claimed from DE3041799A external-priority patent/DE3041799C2/de
Priority claimed from DE3041823A external-priority patent/DE3041823C2/de
Application filed by Forschungszentrum Juelich GmbH, Kernforschungsanlage Juelich GmbH filed Critical Forschungszentrum Juelich GmbH
Publication of EP0051845A1 publication Critical patent/EP0051845A1/fr
Application granted granted Critical
Publication of EP0051845B1 publication Critical patent/EP0051845B1/fr
Expired 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
    • C25B13/00—Diaphragms; Spacing elements
    • 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

Definitions

  • the invention relates to an electrolysis cell for the production of hydrogen and sulfuric acid from water and sulfur dioxide with an electrolyte-flow-through intermediate chamber which separates the anode and cathode compartments and is delimited by separators in the form of ion exchange membranes.
  • the invention relates in particular to such an electrolysis cell which is to be used in the context of a so-called "sulfuric acid hybrid cycle" with the most economical generation of hydrogen.
  • a further improvement of the method mentioned can be achieved by the electrodes or collectors making as close contact as possible with the adjacent separators of the intermediate chamber.
  • Support frames made of polyethylene or Teflon, as e.g. are generally proposed in German Patent 1,546,717 for aqueous electrolysis and would be useful for the application of contact pressure in a three-chamber cell for the production of hydrogen per se, increase the overall resistance of the cell considerably, so that such support structures were rejected.
  • the electrolysis cell according to the invention of the type mentioned at the outset is therefore essentially characterized by a porous support structure made of graphite or ion exchange material between the separators.
  • the porous support structure should have a strength that takes up the necessary contact pressure (for the separators to lie flat against the support structure) and the highest possible free volume between the support material.
  • more or less large gaps are also referred to as "pores".
  • the separators with electrodes directly adjoining them rest on the porous support frame filling the entire intermediate chamber.
  • the separators with electrodes directly adjacent to them are pressed against the graphite support structure, which has the highest possible continuous (open) porosity, so that the interelectrolyte flow is not inadmissibly inhibited.
  • Particularly useful is porous graphite or graphite felt with approximately 95% "porosity”.
  • the through porosity of the graphite material used should be at least 8 0%.
  • the ohmic resistance of the electrolysis cell can thus be kept low due to the low specific resistance of support structures made of easily wettable graphite.
  • Support structures made of ion exchange material which advantageously consists of the same material as the separators and can be welded to them, appear to be particularly favorable at the moment.
  • an intermediate chamber structure is obtained which can be provided in the form of sheet material, which facilitates the assembly of the cell and lowers its overall price.
  • the separators can only be pressed together with the electrodes.
  • the support structure should have a sufficient continuous porosity in the electrolyte flow direction between (i.e. parallel to) the separators.
  • the self-ion-conducting ion exchanger can support the charge transport across the intermediate chamber, so that in the case of the support structure made of ion exchange material, a high continuous porosity in this direction is desirable but not mandatory.
  • This essentially axially symmetrical cell is made up of outer plastic discs (eg made of polyvinylidene fluoride) 1 and 2 held together, to which the housing halves 3 and 4 made of graphite are connected inwards.
  • Two copper rings 5 and 6 reinforce the graphite and simultaneously form power connections.
  • the housing halves 3 and 4 with the copper rings 5 and 6 are electrically separated from one another by the intermediate channel frame made of plastic with a supporting structure 12.
  • the cathode 7 and the anode 8 are designed as flow electrodes and are in contact with the separators 9 and 10 formed as cation exchange membranes, which delimit the intermediate chamber 11.
  • the supply of the electrolyte currents is indicated on the drawing.
  • the separators 9 and 10 between the individual cell chambers were cation exchange membranes of the NEOSEPTA C 66-5T type, on which a platinum-coated graphite felt acted as the cathode and a graphite felt as the anode.
  • the ohmic internal resistance of the electrolytic cell can be calculated from the current-voltage characteristics of the electrolytic cell and the individual electrodes (measured against a comparative electrode). This generally consists essentially of the resistances of the cation exchange membranes, the resistance of the electrolyte in the intermediate chamber and the contact resistances which arise from the low contact pressure of the electrodes on the membranes or the collectors on the electrodes.
  • the ohmic resistance of the intermediate chamber through which the electrolyte flows is now increased on the one hand by using a support frame evenly distributed in the intermediate chamber.
  • the electrolysis voltage at a current density of 2oo mA / cm 2 simultaneously decreases from 625 mV to 565 mV, due to the improved catalytic Effect of the platinized graphite felt pressed on as cathode on the cathode-side cation exchange membrane.

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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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
EP81109469A 1980-11-06 1981-10-31 Cellule d'électrolyse avec compartiment intermédiaire traversé par l'électrolyte et structure convenable pour un tel compartiment Expired EP0051845B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3041799A DE3041799C2 (de) 1980-11-06 1980-11-06 Elektrolysezelle mit elektrolytdurchströmter Zwischenkammer und dafür geeignete Zwischenkammerstruktur
DE3041823A DE3041823C2 (de) 1980-11-06 1980-11-06 Elektrolysezelle mit elektrolytdurchströmter Zwischenkammer
DE3041799 1980-11-06
DE3041823 1980-11-06

Publications (2)

Publication Number Publication Date
EP0051845A1 true EP0051845A1 (fr) 1982-05-19
EP0051845B1 EP0051845B1 (fr) 1984-09-19

Family

ID=25788943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109469A Expired EP0051845B1 (fr) 1980-11-06 1981-10-31 Cellule d'électrolyse avec compartiment intermédiaire traversé par l'électrolyte et structure convenable pour un tel compartiment

Country Status (3)

Country Link
US (1) US4443316A (fr)
EP (1) EP0051845B1 (fr)
CA (1) CA1172604A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4734181A (en) * 1984-12-07 1988-03-29 The Dow Chemical Company Electrochemical cell
AU2011204324A1 (en) 2010-01-07 2012-07-26 Diversey, Inc. Modular cartridge system for apparatus producing cleaning and/or sanitizing solutions
US8734623B1 (en) * 2010-10-01 2014-05-27 Powerquest Llc On-demand hydrogen generator
US8882972B2 (en) * 2011-07-19 2014-11-11 Ecolab Usa Inc Support of ion exchange membranes
KR101410911B1 (ko) * 2012-06-22 2014-06-23 한국에너지기술연구원 전기화학 공정을 이용한 이산화황 가스로부터의 수소 및 황산의 제조방법
CN111424286B (zh) * 2020-02-28 2021-06-08 清华大学 一种so2去极化电解池
CN111424287B (zh) * 2020-02-28 2021-09-21 清华大学 一种用于碘化氢浓缩的电解-电渗析池

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR87850E (fr) * 1962-08-24 1966-10-21 Siemens Ag Cellule électrochimique perfectionnée
DE1546717A1 (de) * 1964-05-14 1970-03-26 Siemens Ag Katalysatorelektrode fuer elektrochemische Zellen
GB2005308A (en) * 1977-09-29 1979-04-19 Kernforschungsanlage Juelich Process and electrolytc cell for carrying out electrochemical reaction

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356607A (en) * 1964-07-22 1967-12-05 Ionics Reinforced ion-exchange membranes
US3893901A (en) * 1973-12-04 1975-07-08 Vast Associates Inc J System for softening and dealkalizing water by electrodialysis
US4172774A (en) * 1975-10-30 1979-10-30 Clearwater Systems Inc. Method and apparatus for lessening ionic diffusion
US4165248A (en) * 1976-12-01 1979-08-21 Ppg Industries, Inc. Method of joining fluorocarbon membrane sheets with quaternary ammonium compounds
US4124458A (en) * 1977-07-11 1978-11-07 Innova, Inc. Mass-transfer membrane and processes using same
US4242193A (en) * 1978-11-06 1980-12-30 Innova, Inc. Layered membrane and processes utilizing same
US4361475A (en) * 1980-01-10 1982-11-30 Innova, Inc. Membrane block construction and electrochemical cell

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR87850E (fr) * 1962-08-24 1966-10-21 Siemens Ag Cellule électrochimique perfectionnée
DE1546717A1 (de) * 1964-05-14 1970-03-26 Siemens Ag Katalysatorelektrode fuer elektrochemische Zellen
GB2005308A (en) * 1977-09-29 1979-04-19 Kernforschungsanlage Juelich Process and electrolytc cell for carrying out electrochemical reaction

Also Published As

Publication number Publication date
CA1172604A (fr) 1984-08-14
US4443316A (en) 1984-04-17
EP0051845B1 (fr) 1984-09-19

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