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Πεδίο DCΤιμήΓλώσσα
dc.contributor.authorStathopoulos, Vassilis N.-
dc.contributor.authorNeophytides, Stylianos G.-
dc.contributor.authorCosta, Costas-
dc.date.accessioned2012-11-28T06:36:57Zen
dc.date.accessioned2013-05-16T06:25:47Z-
dc.date.accessioned2015-12-02T09:26:50Z-
dc.date.available2012-11-28T06:36:57Zen
dc.date.available2013-05-16T06:25:47Z-
dc.date.available2015-12-02T09:26:50Z-
dc.date.issued2009-11-25-
dc.identifier.citationApplied Catalysis B: Environmental, 2009, vol. 93, no. 1-2, pp. 1-11en_US
dc.identifier.issn09263373-
dc.identifier.urihttps://hdl.handle.net/20.500.14279/2138-
dc.description.abstractMixed oxides of the general formula La0.8Sr0.2FeO3-x were prepared by ceramic and surfactant methods and tested towards the NO/H2/O2 and NO/CH4/O2 lean-deNOx reactions in the 200–450 8C range. The materials were characterized for their bulk and surface composition by XRD, Mo¨ ssbauer and XPS techniques. The main crystal phases detected were perovskites LaFeO3 and SrFeO3-x, and a-Fe2O3. The Mo¨ ssbauer technique allowed the precise determination of the composition of Fe-containing phases in the solids prepared by both the ceramic and surfactant methods. Significant differences in the composition of the phases and the surface chemical states of Fe, Sr and La were revealed among the two solid compositions. For the CH4 lean-deNOx reaction at 350 8C, the La0.8Sr0.2FeO3-x solid composition (LSF-2) prepared by the surfactant method exhibited an increase by 50% in the rate of NO conversion and by 30% in the rate of N2 formation (per gram basis) as compared to the solid prepared by the ceramic method (LSF-1). An opposite relative catalytic activity behavior was observed for the two solids when tested towards the H2 lean-deNOx reaction. At 375 8C (maximumactivity observed) the solid prepared by the ceramic method (LSF-1) exhibited an increase by 83% in the rate of N2 formation as compared to the solid prepared by the surfactant method (LSF-2). It is suggested that the mobility of surface lattice oxygen, the concentration of oxygen vacant sites, and themixed valences of metal cations present in the La0.8Sr0.2FeO3-x solid all influenced by the preparation method used are themain parameters that largely influenced the catalytic behavior observed over the LSF-1 and LSF-2 solids.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.relation.ispartofApplied Catalysis B: Environmentalen_US
dc.rights© Elsevieren_US
dc.subjectPerovskitesen_US
dc.subjectNO reduction by H2en_US
dc.subjectNO reduction by CH4en_US
dc.subjectLean-deNOxen_US
dc.titleComparative study of La–Sr–Fe–O perovskite-type oxides prepared by ceramic and surfactant methods over the CH4 and H2 lean-deNOxen_US
dc.typeArticleen_US
dc.affiliationUniversity of Cyprusen
dc.collaborationUniversity of Ioanninaen_US
dc.collaborationFORTH-ICE/HTen_US
dc.collaborationUniversity of Cyprusen_US
dc.collaborationNational and Kapodistrian University of Athensen_US
dc.subject.categoryChemical Sciencesen_US
dc.journalsSubscriptionen_US
dc.countryGreeceen_US
dc.countryCyprusen_US
dc.subject.fieldNatural Sciencesen_US
dc.publicationPeer Revieweden_US
dc.identifier.doi10.1016/j.apcatb.2009.09.003en_US
dc.dept.handle123456789/54en
dc.relation.issue1-2en_US
dc.relation.volume93en_US
cut.common.academicyear2009-2010en_US
dc.identifier.spage1en_US
dc.identifier.epage11en_US
item.fulltextNo Fulltext-
item.languageiso639-1en-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.cerifentitytypePublications-
item.openairetypearticle-
crisitem.journal.journalissn0926-3373-
crisitem.journal.publisherElsevier-
crisitem.author.deptDepartment of Chemical Engineering-
crisitem.author.facultyFaculty of Geotechnical Sciences and Environmental Management-
crisitem.author.orcid0000-0002-8459-0356-
crisitem.author.parentorgFaculty of Geotechnical Sciences and Environmental Management-
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