Improvement of oxygen flux through perovskite membranes using a coating of ultra-divided particles
| Autor: | Pierre-Marie Geffroy, L. Guironnet, Thierry Chartier, Nicolas Richet |
|---|---|
| Přispěvatelé: | Science des Procédés Céramiques et de Traitements de Surface (SPCTS), Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM), Agence de l'Environnement et de la Maîtrise de l'Energie (ADEME), Axe 1 : procédés céramiques (SPCTS-AXE1), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Institut des Procédés Appliqués aux Matériaux (IPAM), Centre de Recherche Claude Delorme [Jouy-en-Josas] (CRCD), Air Liquide [Siège Social], Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM) |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
General Chemical Engineering Diffusion Bulk diffusion Coating Inorganic chemistry Ionic bonding chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Oxygen Perovskite ceramic membrane Mixed conductor Industrial and Manufacturing Engineering Coating Perovskite (structure) Applied Mathematics Oxygen semi-permeation Surface exchange mechanism [CHIM.MATE]Chemical Sciences/Material chemistry General Chemistry 021001 nanoscience & nanotechnology Microstructure 0104 chemical sciences Membrane chemistry Chemical engineering Particle-size distribution engineering 0210 nano-technology |
| Zdroj: | Chemical Engineering Science Chemical Engineering Science, Elsevier, 2016, 156, pp.128-135. ⟨10.1016/j.ces.2016.09.019⟩ |
| ISSN: | 0009-2509 |
| DOI: | 10.1016/j.ces.2016.09.019 |
| Popis: | International audience; In the last decades, numerous mixed ionic and electronic conducting materials with a perovskite structure have been investigated for their potential applications as membrane materials for oxygen separation applications. This work shows that significant improvement of electrochemical properties of two perovskite materials, La0.6Sr0.4Fe0.8Co0.2O3-δ (LSFCo6482) and La0.5Sr0.5Fe0.7Ga0.3O3-δ (LSFG5573) is obtained using ultra-divided particles perovskite coating. This coating is obtained by dip-coating thanks to a derived sol-gel synthesis route. The ultra-divided particles have a grain size distribution from 300 to 500 nm. The oxygen flux measured using a specific setup shows that the oxygen surface exchange kinetics and bulk diffusion coefficient depend on the microstructure and the chemical composition of the coating material. The relation established between chemical formulation, microstructure, and oxygen flux were used to design optimized membranes. |
| Databáze: | OpenAIRE |
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