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  5. Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά). ΧΗΜ
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Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/8324
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dc.contributor.authorLeontiou, A. A.en
dc.contributor.authorLadavos, A. K.en
dc.contributor.authorArmatas, G. S.en
dc.contributor.authorTrikalitis, P. N.en
dc.contributor.authorPomonis, P. J.en
dc.date.accessioned2015-11-24T16:40:52Z-
dc.date.available2015-11-24T16:40:52Z-
dc.identifier.issn0926-860X-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/8324-
dc.rightsDefault Licence-
dc.subjectperovskitesen
dc.subjectla-sr-mn-oen
dc.subjectrietvelden
dc.subjectno plus co reactionen
dc.subjectkineticsen
dc.subjectcarbon-monoxideen
dc.subjectcatalytic-propertiesen
dc.subjectdefect structureen
dc.subjectdoped lamno3en
dc.subjectnitric-oxideen
dc.subjectreductionen
dc.subjectoxygenen
dc.subjectnonstoichiometryen
dc.subjectcombustionen
dc.subjectmethaneen
dc.titleKinetics investigation of NO plus CO reaction on La-Sr-Mn-O perovskite-type mixed oxidesen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.primaryDOI 10.1016/j.apcata.2003.12.017-
heal.identifier.secondary<Go to ISI>://000221551600012-
heal.identifier.secondaryhttp://ac.els-cdn.com/S0926860X03010640/1-s2.0-S0926860X03010640-main.pdf?_tid=25aab3e9c8c928b2950fe3c55b6995d2&acdnat=1333036470_29c78726e6d87e06c925016833c31766-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείαςel
heal.publicationDate2004-
heal.abstractSubstituted perovskite-type mixed oxides of the general formula La1-xSrx(Mn-III/Mn-IV)O3+/-delta prepared by the nitrate method were examined by X-ray diffractometry (XRD) and the diffraction data were analyzed using the Rietveld refinement method. The amount of desorbed oxygen from the samples when heating in a He atmosphere was estimated with thermogravimetric O-2/temperature programmed desorption experiments while the amount of Mn-III and Mn-IV in the samples was determined iodometrically. The substitution of La3+ by Sr2+ leads to a gradual increase of Mn-IV in the solids and to the transition from an oxygen excess state to an oxygen deficient one. The samples were checked as catalysts for the reaction NO + CO --> products in a lab-scale plug-flow reactor between 220 and 560degreesC. The reaction rate profiles were simulated using a relationship of the form R = omega(1)R(low T) + omega(2)R(high) (T), where omega(1), omega(2) the weighing coefficients for the corresponding R at low R-low T and high temperatures R-high (T). From the fitting data the true activation energies E-1 and E-2 were estimated for R-low T and R-high T as well as the heats of adsorption DeltaH(ads(NO)) and AH(ads(CO)) for the NO and CO species. Finally, the values of E-app/low T estimated from typical Arrhenius plots ln R = f(1/T) at the low temperature region are in reasonable agreement with the difference E-1 - DeltaH(ads(NO)), a fact validating the results of simulation/fitting and indicating its usefulness for describing the reaction rates and estimating the kinetic and thermodynamic parameters controlling them. This methodology of simulation provides easily kinetic (activation energies) as well as thermodynamic (heats of adsorption) parameters which otherwise would necessitate differentiated experimental set-ups. (C) 2003 Elsevier B.V. All rights reserved.en
heal.publisherElsevieren
heal.journalNameApplied Catalysis a-Generalen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
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