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| Hauptseite > Publikationsdatenbank > Ceria-based composites for application in Oxygen transport membranes |
| Hauptseite > Publikationsdatenbank > Ceria-based composites for application in Oxygen transport membranes |
| Book/Dissertation / PhD Thesis | FZJ-2024-01244 |
2024
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
Jülich
ISBN: 978-3-95806-739-4
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Please use a persistent id in citations: doi:10.34734/FZJ-2024-01244
Abstract: Among the gas membrane separation technologies, inorganic dense membranes, like oxygen transport membranes (OTMs), are regarded as one of the most potential and promising methods and gain considerable attention over the past decades. OTMs represent an energy-efficient and economical alternative to conventional cryogenic air separation for producing pure oxygen for oxyfuel combustion technologies as they provide high oxygen selectivity in a single-step process. OTMs require high permeability as well as chemical and mechanical stability under harsh ambient conditions, like CO2- or SOx - containing atmospheres. Mixed ionic-electronic conductors (MIEC) are applied mostly as materials for OTMs. Compared to diverse single-phase materials, dual-phase composite materials, i.e., pure ionic-conductor Ce0.8Gd0.2O2-δ (CGO20) and electronic-conductor FeCo2O4 (FCO), may potentially fulfil these requirements completely. The transport properties of the MIEC system are closely related to the composition and conducting properties of the individual phases in the composite, as well as microstructure features, such as density, porosity, grain size, and the presence of defects. Therefore, the objective of this work is to determine the relationship between the composition as well as the morphology of the permeation properties in the fluorite-spinel ceramic composite.
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