dc.date.accessioned | 2022-10-28T15:30:04Z | |
dc.date.available | 2022-10-28T15:30:04Z | |
dc.date.created | 2022-08-11T15:45:39Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | Emhjellen, Linn Katinka Susanne Shi Xing, Wen Li, Zuoan Haugsrud, Reidar . Oxygen permeability and surface kinetics of composite oxygen transport membranes based on stabilized δ-Bi2O3. Journal of Membrane Science. 2022, 660, 1-6 | |
dc.identifier.uri | http://hdl.handle.net/10852/97391 | |
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. | |
dc.language | EN | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Oxygen permeability and surface kinetics of composite oxygen transport membranes based on stabilized δ-Bi2O3 | |
dc.title.alternative | ENEngelskEnglishOxygen permeability and surface kinetics of composite oxygen transport membranes based on stabilized δ-Bi2O3 | |
dc.type | Journal article | |
dc.creator.author | Emhjellen, Linn Katinka Susanne Shi | |
dc.creator.author | Xing, Wen | |
dc.creator.author | Li, Zuoan | |
dc.creator.author | Haugsrud, Reidar | |
cristin.unitcode | 185,15,12,0 | |
cristin.unitname | Kjemisk institutt | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 2042522 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Membrane Science&rft.volume=660&rft.spage=1&rft.date=2022 | |
dc.identifier.jtitle | Journal of Membrane Science | |
dc.identifier.volume | 660 | |
dc.identifier.doi | https://doi.org/10.1016/j.memsci.2022.120875 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0376-7388 | |
dc.type.version | PublishedVersion | |
cristin.articleid | 120875 | |
dc.relation.project | NFR/262393 | |
dc.relation.project | NFR/268450 | |