Impact of microstructure on oxygen semi-permeation performance of perovskite membranes: Understanding of oxygen transport mechanisms

Mickael Reichmann; Pierre-Marie Geffroy; N. Richet; Thierry Chartier

Impact of microstructure on oxygen semi-permeation performance of perovskite membranes: Understanding of oxygen transport mechanisms

Mickael Reichmann ¹ Pierre-Marie Geffroy ¹ N. Richet ² Thierry Chartier ¹

1 SPCTS-AXE1 - Axe 1 : procédés céramiques

SPCTS - Science des Procédés Céramiques et de Traitements de Surface

2 CRCD - Centre de Recherche Claude Delorme [Jouy-en-Josas]

Abstract : The influence of dense membrane microstructures on semi permeation performance is still not well understood, and no consensus or explanation can be established from the literature. The apparent discrepancy is likely due to a poor understanding of the oxygen transport mechanisms through the membrane and, specifically, to the impact of the microstructure on the oxygen surface exchange kinetics. The aim of this paper is to provide a better understanding of the impact of microstructures on oxygen transport mechanisms through the membrane. Two reference materials, Ba0.5Sr0.5Fe0.7Co0.3O3 (BSFCo) and La0.5Sr0.5Fe0.7Ga0.3O3 (LSFG) perovskites, are considered to explain the discrepancies observed in the literature.

Keywords : Oxygen transport membrane Mixed conductors Microstructure Oxygen surface exchange Oxygen diffusion

Type de document :

Article dans une revue

Domaine :

Chimie / Matériaux

Liste complète des métadonnées

https://hal-unilim.archives-ouvertes.fr/hal-01727659
Contributeur : Thierry Chartier <>
Soumis le : vendredi 9 mars 2018 - 14:07:40
Dernière modification le : vendredi 23 mars 2018 - 15:06:34

Impact of microstructure on oxygen semi-permeation performance of perovskite membranes: Understanding of oxygen transport mechanisms

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Impact of microstructure on oxygen semi-permeation performance of perovskite membranes: Understanding of oxygen transport mechanisms

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