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Inverzna gasna hromatografija na hrom(III)-oksidu. Deo II

dc.creatorOnjia, Antonije
dc.creatorMilonjić, Slobodan K.
dc.creatorRajaković, Ljubinka V.
dc.date.accessioned2021-03-10T10:03:59Z
dc.date.available2021-03-10T10:03:59Z
dc.date.issued2002
dc.identifier.issn0352-5139
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/487
dc.description.abstractThe interactions of n-hexane, benzene, chloroform, and tetrahydrofuran with dried (amorphous) chromia (I) and chromia heated at 1073 K (crystalline) (II), both obtained from a colloidal dispersion, and a commercially available chromia (III) were studied by inverse gas chromatography (IGC) under finite surface coverage conditions. The isotherms, in the temperature range 383 – 423 K, were used to estimate the surface area, the adsorption energy distribution, the isosteric heat of adsorption, and the spreading pressure on the surfaces of the solids. The uniformly reduced adsorption ability of the heated chromia was attributed to the dehydroxylation of the surface at the higher temperatures. Both solids showed an increased affinity toward chloroform molecules, as a result of strong acid-base interaction.en
dc.description.abstractIspitivane su interakcije n-heksana, hloroforma, tetrahidrofurana i benzena sa površinama čvrste faze laboratorijski dobijenog koloidnog hrom(III)-oksida i komercijalnog hrom(III)-oksida, metodom inverzne gasne hromatografije (IGC) pri konačnoj prekrivenosti. Adsorpcione izoterme su dobijene za dva uzorka čvrste faze dobijene iz sola hrom(III)-oksida, sušenu čvrstu fazu sola (423 K, uzorak I), amorfne, i žarenu (1073 K, uzorak II) kristalne strukture, kao i za komercijalni hrom(III)-oksid kristalne strukture, u temperaturnom opsegu 383 – 423 K. Iz dobijenih izotermi izračunate su: vrednosti specifičnih površina, funkcije raspodele energije na površini, izosterič ne toplote adsorpcije i pritisak adsorbata na površinama. Značajno manja adsorpciona moć uzorka II pripisana je dehidroksilaciji površine u toku prethodnog tretmana na visokim temperaturama. U oba slučaja čvrsta površina pokazuje pojačani afinitet prema hloroformu, usled uspostavljanja snažnih kiselo-baznih interakcija.sr
dc.publisherSerbian Chemical Society, Belgrade
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceJournal of the Serbian Chemical Society
dc.subjectinverse gas chromatographyen
dc.subjectchromiaen
dc.subjectadsorptionen
dc.subjectorganicsen
dc.subjectisothermsen
dc.subjectisosteric heaten
dc.titleInverse gas chromatrography of chromia. Part II. Finite surface coverageen
dc.titleInverzna gasna hromatografija na hrom(III)-oksidu. Deo IIsr
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage178
dc.citation.issue3
dc.citation.other67(3): 165-178
dc.citation.rankM23
dc.citation.spage165
dc.citation.volume67
dc.identifier.rcubconv_497
dc.identifier.scopus2-s2.0-0036003608
dc.identifier.wos000174611800003
dc.type.versionpublishedVersion


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