000141077 001__ 141077
000141077 005__ 20240711092305.0
000141077 020__ $$a978-3-89336-916-4
000141077 0247_ $$2Handle$$a2128/5688
000141077 0247_ $$2ISSN$$a1866-1793
000141077 037__ $$aFZJ-2013-06279
000141077 041__ $$aEnglish
000141077 1001_ $$0P:(DE-Juel1)140575$$aLi, Xiaoyu$$b0$$eCorresponding author$$ufzj
000141077 245__ $$aLong Term Stability and Permeability of Mixed Ion Conducting Membranes Under Oxyfuel Conditions$$f - 2013
000141077 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2013
000141077 300__ $$aIII, 143 S.
000141077 3367_ $$2DataCite$$aOutput Types/Dissertation
000141077 3367_ $$0PUB:(DE-HGF)3$$2PUB:(DE-HGF)$$aBook$$mbook
000141077 3367_ $$2ORCID$$aDISSERTATION
000141077 3367_ $$2BibTeX$$aPHDTHESIS
000141077 3367_ $$02$$2EndNote$$aThesis
000141077 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1598514809_7630
000141077 3367_ $$2DRIVER$$adoctoralThesis
000141077 4900_ $$0PERI:(DE-600)2445288-9$$aSchriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment$$v194
000141077 500__ $$3POF3_Assignment on 2016-02-29
000141077 502__ $$aDissertation, RWTH Aachen, 2013$$bDissertation$$cRWTH Aachen$$d2013
000141077 520__ $$aThe thermochemical properties, especially the long-term behaviour of mixed electron-ion conducting materials for oxygen separation, were investigated under oxyfuelcondition in this thesis. Amongst those oxygen-permeable materials, perovskite-type oxides demonstrate remarkably high oxygen fluxes. Nevertheless, great effort has been put into the investigation of the long-term sustainable problem occurring in the intermediate temperature (IT) range of 500-800 °C in some perovskite membranes,which is caused by thermodynamic decomposition. This decay of membrane properties during operation becomes a serious obstacle for applications in coal-fired power plants. Besides, a relatively low expansion coefficient of membrane materials is also suggested to avoid compatibility issues. Perovskite-structured BaxSr$_{1-x}$Co$_{y}$Fe$_{1-y}$O$_{3-\delta}$ (BSCF) materials were synthesized by the method of solid state reaction. The sintering behaviour of BSCF powders was studiedprior to the production of the gastight membranes. In view of future application, characteristic membrane properties like melting temperature, oxygen nonstoichiometryand thermal expansion behaviour were measured in synthetic air accordingly. The association between the thermochemical properties and the doping compositions ofBSCF materials as well as temperature effect was investigated. Moreover, the degradation process in BSCF membranes during long-term operation was studied under oxyfuel condition. In the case of oxygen permeation measurements, the variation of oxygen flux through the membranes under the air/He pressure gradient wasrecorded. A slow exponential decay of the permeate flux was observed at 800 °C compared to the more stabilized oxygen permeability of membranes at higher  temperatures. The reason for the deterioration of membrane permeability is mainly ascribed to the phase decomposition from cubic into hexagonal polymorph. Unexpectedly, an increment of oxygen flux was found in the Ba$_{0.4}$Sr$_{0.6}$Co$_{0.2}$Fe$_{0.8}$O$_{3-\delta}$ membrane measured at 850 °C, though kinetic decomposition still occurs in this material. Based on the permeation behaviour of BSCF membranes during cyclic permeation tests, it is confirmed that the cubic-hexagonal phase transition is reversible and membrane performance could be retrieved by the periodical variation of temperatures above 850 °C. The driving force as well as kinetics for the phase transition is discussed in this study according to the long-term annealing measurements. In [...]
000141077 536__ $$0G:(DE-HGF)POF2-123$$a123 - Fuel Cells (POF2-123)$$cPOF2-123$$fPOF II$$x0
000141077 650_7 $$0V:(DE-588b)4012494-0$$2GND$$aDissertation$$xDiss.
000141077 8564_ $$uhttps://juser.fz-juelich.de/record/141077/files/Energie_Umwelt_194.pdf$$yOpenAccess
000141077 8564_ $$uhttps://juser.fz-juelich.de/record/141077/files/Energie_Umwelt_194.ps.gz$$yOpenAccess
000141077 8564_ $$uhttps://juser.fz-juelich.de/record/141077/files/Energie_Umwelt_194.gif?subformat=icon$$xicon$$yOpenAccess
000141077 8564_ $$uhttps://juser.fz-juelich.de/record/141077/files/Energie_Umwelt_194.gif?subformat=icon-700$$xicon-700$$yOpenAccess
000141077 8564_ $$uhttps://juser.fz-juelich.de/record/141077/files/Energie_Umwelt_194.jpg?subformat=icon-144$$xicon-144$$yOpenAccess
000141077 8564_ $$uhttps://juser.fz-juelich.de/record/141077/files/Energie_Umwelt_194.jpg?subformat=icon-180$$xicon-180$$yOpenAccess
000141077 8564_ $$uhttps://juser.fz-juelich.de/record/141077/files/Energie_Umwelt_194.jpg?subformat=icon-640$$xicon-640$$yOpenAccess
000141077 909__ $$ooai:juser.fz-juelich.de:141077$$pVDB
000141077 909CO $$ooai:juser.fz-juelich.de:141077$$pdnbdelivery$$pdriver$$pVDB$$popen_access$$popenaire
000141077 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)140575$$aForschungszentrum Jülich GmbH$$b0$$kFZJ
000141077 9132_ $$0G:(DE-HGF)POF3-119H$$1G:(DE-HGF)POF3-110$$2G:(DE-HGF)POF3-100$$aDE-HGF$$bForschungsbereich Energie$$lEnergieeffizienz, Materialien und Ressourcen$$vAddenda$$x0
000141077 9131_ $$0G:(DE-HGF)POF2-123$$1G:(DE-HGF)POF2-120$$2G:(DE-HGF)POF2-100$$3G:(DE-HGF)POF2$$4G:(DE-HGF)POF$$aDE-HGF$$bEnergie$$lRationelle Energieumwandlung und -nutzung$$vFuel Cells$$x0
000141077 9141_ $$y2013
000141077 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess
000141077 920__ $$lyes
000141077 9201_ $$0I:(DE-Juel1)IEK-2-20101013$$kIEK-2$$lWerkstoffstruktur und -eigenschaften$$x0
000141077 9801_ $$aFullTexts
000141077 980__ $$aphd
000141077 980__ $$aVDB
000141077 980__ $$abook
000141077 980__ $$aI:(DE-Juel1)IEK-2-20101013
000141077 980__ $$aUNRESTRICTED
000141077 981__ $$aI:(DE-Juel1)IMD-1-20101013