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1. WO2020064241 - METHOD FOR REMOVING NON-PROTON CATIONIC IMPURITIES FROM AN ELECTROCHEMICAL CELL AND AN ELECTROCHEMICAL CELL

Publication Number WO/2020/064241
Publication Date 02.04.2020
International Application No. PCT/EP2019/072776
International Filing Date 27.08.2019
IPC
C25B 15/00 2006.01
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
15Operating or servicing of cells
C25B 9/08 2006.01
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
9Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies
06Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
08with diaphragms
C25B 9/10 2006.01
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
9Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies
06Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
08with diaphragms
10including an ion-exchange membrane in or on which electrode material is embedded
CPC
C25B 15/00
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
15Operating or servicing of cells
C25B 9/08
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
9Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies
06Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
08with diaphragms
C25B 9/10
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
9Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies
06Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
08with diaphragms
10including an ion-exchange membrane in or on which electrode material is embedded
Applicants
  • PAUL SCHERRER INSTITUT [CH]/[CH]
Inventors
  • GUBLER, Lorenz
  • BABIC, Ugljesa
  • ZLOBINSKI, Mateusz
  • BOILLAT, Pierre
Agents
  • FISCHER, Michael
Priority Data
18196579.925.09.2018EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR REMOVING NON-PROTON CATIONIC IMPURITIES FROM AN ELECTROCHEMICAL CELL AND AN ELECTROCHEMICAL CELL
(FR) PROCÉDÉ D'ÉLIMINATION D'IMPURETÉS CATIONIQUES AUTRES QUE DES PROTONS D'UNE CELLULE ÉLECTROCHIMIQUE ET CELLULE ÉLECTROCHIMIQUE
Abstract
(EN)
It is the objective of the present invention to provide a method and an electrochemical cell which allow to achieve a purification of the ionomer load of the proton exchange membrane causing less corrosion and other collateral effects to the electrochemical cell. With respect to the method, this objective is achieved according to the present invention by a method to remove non- proton cationic impurities from the ionomer comprised in a proton exchange membrane and the respective anode side and cathode side catalyst layer of an electrochemical cell, comprising the steps of: a) providing a supply path for an anode feed to the ionomer on the anode side of the proton exchange membrane; b) providing a supply path for a cathode feed to the ionomer on the cathode side of the proton exchange membrane; and c) bringing a regenerating fluid with acidic pH in contact to the ionomer on the cathode side of the proton exchange membrane to accomplish an ion exchange of the non-proton cationic impurities with protons and thus remove the non- proton cationic impurities from the ionomer into the regenerating fluid. These measures allow to remove the non-proton cationic impurities from the ionomer of the electrochemical cell without increasing the risk of corrosion and without an interruption of the process of the electrochemical cell.
(FR)
La présente invention concerne un procédé et une cellule électrochimique qui permettent d'effectuer une purification de la charge ionomère d'une membrane échangeuse de protons provoquant moins de corrosion et autres effets collatéraux sur la cellule électrochimique. Le procédé de la présente invention élimine les impuretés cationiques autres que des protons de l'ionomère compris dans une membrane échangeuse de protons et la couche de catalyseur côté anode et côté cathode respectives d'une cellule électrochimique, et comprend les étapes consistant à : a) fournir un trajet d'alimentation pour l'alimentation de l'anode en ionomère sur le côté anode de la membrane d'échange de protons; b) fournir un trajet d'alimentation pour l'alimentation de la cathode en ionomère sur le côté cathode de la membrane échangeuse de protons; et c) mettre un fluide de régénération à pH acide en contact avec l'ionomère sur le côté cathode de la membrane échangeuse de protons pour réaliser un échange d'ions des impuretés cationiques autres que des protons avec des protons et ainsi éliminer les impuretés cationiques autres que les protons de l'ionomère dans le fluide de régénération. Ces mesures permettent d'éliminer les impuretés cationiques autres que les protons de l'ionomère de la cellule électrochimique sans augmenter le risque de corrosion et sans interruption du fonctionnement de la cellule électrochimique. FIG. 4:
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Latest bibliographic data on file with the International Bureau