Identification of the rate-determining step in oxygen transport through La(1−x)SrxFe(1−y)GayO3−δ perovskite membranes - Université de Limoges Accéder directement au contenu
Article Dans Une Revue Journal of Membrane Science Année : 2015

Identification of the rate-determining step in oxygen transport through La(1−x)SrxFe(1−y)GayO3−δ perovskite membranes

Résumé

La(1−x)SrxFe(1−y)GayO3−δ perovskites are some of the most promising materials for oxygen transport membranes due to their high oxygen semi-permeation and good chemical stability at high temperature under a wide range of oxygen partial pressures (from 0.21 to 10−19 atm.). This paper is focused on a better understanding of the influence of the Ga and Sr substitution ratios in the La(1−x)SrxFe(1−y)GayO3−δ perovskite series on oxygen semi-permeation performances, oxygen diffusion and surface exchange coefficients. This study identifies the optimal compositions of the La(1−x)SrxFe(1−y)GayO3−δ perovskite series. In addition, this study shows that the rate-determining step of oxygen transport through the membrane depends strongly on the Ga and Sr substitution ratios.
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Dates et versions

hal-01097213 , version 1 (19-12-2014)

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Pierre-Marie Geffroy, Mickaël Reichmann, Laureline Kilmann, Jenny Jouin, N. Richet, et al.. Identification of the rate-determining step in oxygen transport through La(1−x)SrxFe(1−y)GayO3−δ perovskite membranes. Journal of Membrane Science, 2015, 476, pp.340-347. ⟨10.1016/j.memsci.2014.11.048⟩. ⟨hal-01097213⟩
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