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Gestion optimale du gaz électrogénéré dans un réacteur d'électroréduction de minerai de fer

Abstract : Electrogenerated gas in electrochemical reactors is considered as an electrochemical and hydrodynamic phenomenon. The ohmic drop in the electrolyte solution is one of important parameter to evaluate for the optimization design of electrochemical reactors. It is due to the resistance of the solution, therefore, its electrical conductivity and of the distance between the two electrodes. To reduce the energy consumption of the electrolytic reduction cell of hematite particles to metallic iron, we studied the design of anode, the location of oxygen bubbles production, in two equivalent cells for water electrolysis in an alkali media. The results showed that the gas hold up increases along the anode and only 25% of the initial anode height is actually active. Moreover the bubbles reach their terminal velocity after 50% of the initial anode height. This allowed us to formulate recommendations that allow the best conditions of bubbles electrogenerated disengagement and low energy consumption
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https://hal.univ-lorraine.fr/tel-01750504
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Lokmane Abdelouahed. Gestion optimale du gaz électrogénéré dans un réacteur d'électroréduction de minerai de fer. Autre. Université de Lorraine, 2013. Français. ⟨NNT : 2013LORR0203⟩. ⟨tel-01750504⟩

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