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dc.creatorGrbić, Boško
dc.creatorRadić, Nenad
dc.creatorArsenijević, Zorana
dc.creatorGarić Grulović, Radmila
dc.creatorGrbavčić, Željko
dc.date.accessioned2019-01-30T17:20:21Z
dc.date.available2019-01-30T17:20:21Z
dc.date.issued2009
dc.identifier.issn0926-3373
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/539
dc.description.abstractThe deep oxidation of dimethylamine (DMA) was studied over Pt/Al2O3 catalysts with small (1 nm) and large (7.8-15.5 nm) Pt crystallite sizes. The turnover frequency (TOF) was higher for the large than for the small Pt crystallites, indicating that the reaction is structure sensitive. Two kinetic models were used to interpret the obtained results, i.e., the Mars van Krevelen and a mechanism based on the adsorption of oxygen and adsorption of dimethylamine on different active sites were employed. Both models showed that the activation energy for the oxygen chemisorption rate constant (k(o)) decreased with increasing of Pt crystallite size and that the activation energy for the surface reaction rate constant (k(i)) was independent of the Pt crystallite size. The structure sensitivity may be explained by differences in the reactivity of the oxygen adsorbed on these Pt crystallites. The Mars van Krevelen model fits the TOF values very well at concentrations of DMA higher than 1500 ppm, while in the lower concentrations region, the model under predicts the experimental data. The model based on the adsorption of oxygen and DMA on different active sites fits the experimental data quite well over the whole temperature and concentration range. The fitted values of the Henry adsorption constant are independent of the Pt crystallite size.en
dc.publisherElsevier Science Bv, Amsterdam
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/142014/RS//
dc.rightsrestrictedAccess
dc.sourceApplied Catalysis B-Environmental
dc.subjectPt/Al2O3 Catalysten
dc.subjectDeep oxidationen
dc.subjectDimethylamineen
dc.subjectKineticsen
dc.subjectStructure sensitivityen
dc.titleStructure sensitivity of dimethylamine deep oxidation over Pt/Al2O3 catalystsen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractГрбавциц, З.; Грбић, Бошко; Радић, Ненад; Гарић Груловић, Радмила; Aрсенијевић, Зорана;
dc.citation.volume90
dc.citation.issue3-4
dc.citation.spage478
dc.citation.epage484
dc.citation.other90(3-4): 478-484
dc.citation.rankaM21
dc.identifier.doi10.1016/j.apcatb.2009.04.008
dc.identifier.rcubConv_2453
dc.identifier.scopus2-s2.0-67649265084
dc.identifier.wos000268042800020
dc.type.versionpublishedVersion


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