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dc.contributor.authorXing, Wen
dc.contributor.authorLi, Zuoan
dc.contributor.authorPeters, Thijs
dc.contributor.authorFontaine, Marie-Laure
dc.contributor.authorMcCann, Michael
dc.contributor.authorEvans, Anna
dc.contributor.authorNorby, Truls Eivind
dc.contributor.authorBredesen, Rune
dc.identifier.citationSeparation and Purification Technology. 2019, 212 723-727.en_US
dc.description.abstractIn a solid-liquid dual-phase CO2 separation membrane, the native ions in the molten alkali carbonate, including carbonate anions and metal cations can transport CO2 in a process that is charge-compensated by electronic species (electrons or holes), oxide ions, or hydroxide ions, depending on materials and conditions. This strongly affects the design of experiments for assessing the performance of these membranes, and further determines the routes for integration of these membranes in industrial applications. Here we report how dissolved oxides in the liquid carbonate improve the CO2 flux of the membrane due to an enhanced charge-compensating oxygen ion transport. A qualitative understanding of the magnitude and role of oxide ion conductivity in the molten phase and in the solid support as a function of the temperature is provided. Employing a solid matrix of ceria, and dissolving CsVO3 and MoO3 oxides in the molten carbonate phase led to an almost doubled CO2 flux at 550 °C under dry ambient conditions. When the sweep gas contained 2.5% H2O, the CO2 flux was increased further due to formation of hydroxide ions in the molten carbonate acting as charge compensating species. Also, as a consequence of permeation controlled by ions in the liquid phase, the CO2 flux increased with the pore volume of the solid matrix.en_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.subjectSolubility of oxidesen_US
dc.subjectMolten carbonatesen_US
dc.subjectCO2 separationen_US
dc.subjectDual-phase membranesen_US
dc.titleImproved CO2 flux by dissolution of oxide ions into the molten carbonate phase of dual-phase CO2 separation membranesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holderThis is the authors’ accepted and refereed manuscript to the article.This manuscript version is made available under the CC-BY-NC-ND 4.0 license. DOI:
dc.source.journalSeparation and Purification Technologyen_US
dc.relation.projectNorges forskningsråd: 207841en_US
dc.relation.projectNorges forskningsråd: 272688en_US
cristin.unitnameBærekraftig energiteknologi

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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal