dc.contributor.author | Emhjellen, Linn Katinka Susanne Shi | |
dc.contributor.author | Xing, Wen | |
dc.contributor.author | Li, Zuoan | |
dc.contributor.author | Haugsrud, Reidar | |
dc.date.accessioned | 2022-10-26T12:08:18Z | |
dc.date.available | 2022-10-26T12:08:18Z | |
dc.date.created | 2022-08-11T15:45:39Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | Journal of Membrane Science. 2022, 660 1-6. | en_US |
dc.identifier.issn | 0376-7388 | |
dc.identifier.uri | https://hdl.handle.net/11250/3028434 | |
dc.description.abstract | Composite ceramic membranes based on the ionic conducting Tm-stabilized δ-Bi2O3 (BTM) and the electronic conducting (La0.8Sr0.2)0.99MnO3-δ (LSM) exhibit among the highest oxygen flux values reported for Bi2O3-based membranes. Here, we use pulse-response isotope exchange (PIE) and oxygen flux measurements to elaborate on limiting factors for the oxygen permeation in BTM - 40-70 vol% LSM composites. Once both phases percolate, between 30 and 50 vol% BTM, the flux is essentially independent of the BTM/LSM volume ratio. The oxygen permeability is under mixed diffusion- and surface control, gradually becoming more bulk-limited with increasing temperature. The oxygen exchange coefficients of BTM-LSM are significantly higher than its constituent phases, revealing that a cooperative surface exchange mechanism enhances the kinetics. Some of the Tm was substituted with Pr to introduce electronic conductivity in BTM. (Bi0.8Tm0.15Pr0.05)2O3-δ (BTP) exhibits higher surface exchange coefficients compared to BTM, but the oxygen flux remains one order of magnitude lower than that of percolating BTM-LSM composites. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Oxygen permeability and surface kinetics of composite oxygen transport membranes based on stabilized δ-Bi2O3 | en_US |
dc.title.alternative | Oxygen permeability and surface kinetics of composite oxygen transport membranes based on stabilized δ-Bi2O3 | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | © 2022 The Authors. Published by Elsevier B.V | en_US |
dc.source.pagenumber | 1-6 | en_US |
dc.source.volume | 660 | en_US |
dc.source.journal | Journal of Membrane Science | en_US |
dc.identifier.doi | 10.1016/j.memsci.2022.120875 | |
dc.identifier.cristin | 2042522 | |
dc.relation.project | Norges forskningsråd: 262393 | en_US |
dc.relation.project | Norges forskningsråd: 268450 | en_US |
dc.source.articlenumber | 120875 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |