Conception et validation expérimentale d’une cellule électrochimique de type PEM pour l’appauvrissement en oxygène de l’air

Abstract : This work concerns the conception of a PEM electrochemical cell for oxygen depletion from an air flow. The starting idea consists in finding solution for the problem of photo-bioreactors regarding the control of the oxygen amount necessary for the growth of microorganisms. Two main areas are essential for our study. At first, we studied the technological aspect since the electrochemical cell design is the result of a combination of a half-fuel cell at the cathode compartment (reduction of oxygen) with a half-water electrolyzer at the anode. Therefore, the choice of materials for the different constituents of the cell passes through the study of PEM fuel cell systems and electrolyzers as well. This study allowed us to design and experimentally validate our cell. In parallel, the electrochemical cell, subject of this study, is designed to function primarily as cell of oxygen depletion. The reaction key which control mode is the ORR. However, the kinetic study of this reaction involves the study of two other reactions when our cell operates in the water electrolyser mode. The latter mode has been taken into account in our design of the test bench. In electrolysis, hydrogen evolution takes place at the cathode and oxygen evolution at the anode will occur. The survey of the kinetic parameters of these two reactions was useful for determining the kinetic parameters of the main reaction; reduction reaction of O2 at the cathode
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Aboulbaba Eladeb. Conception et validation expérimentale d’une cellule électrochimique de type PEM pour l’appauvrissement en oxygène de l’air. Alimentation et Nutrition. Université de Lorraine, 2014. Français. ⟨NNT : 2014LORR0310⟩. ⟨tel-01751482⟩

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