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Application of quasi-equilibrated thermodesorption of hexane and cyclohexane for characterization of porosity of zeolites and ordered mesoporous silicas

Application of quasi-equilibrated thermodesorption ...

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dc.contributor.author Makowski, Wacław [SAP11013201] pl
dc.contributor.author Mańko, Maria [USOS1021] pl
dc.contributor.author Dudek, Anna pl
dc.contributor.author Mlekodaj, Kinga [SAP14005639] pl
dc.date.accessioned 2015-01-07T06:09:04Z
dc.date.available 2015-01-07T06:09:04Z
dc.date.issued 2013 pl
dc.identifier.issn 0929-5607 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/2486
dc.language eng pl
dc.rights Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/pl/legalcode *
dc.title Application of quasi-equilibrated thermodesorption of hexane and cyclohexane for characterization of porosity of zeolites and ordered mesoporous silicas pl
dc.type JournalArticle pl
dc.description.physical 537-544 pl
dc.identifier.weblink https://link.springer.com/content/pdf/10.1007%2Fs10450-013-9476-9.pdf pl
dc.abstract.en Quasi equilibrated temperature programmed desorption and adsorption (QE-TPDA) of hexane and cyclohexane was applied for characterization of zeolites 5A, ZSM-5, 13X, Y, NaMOR and ordered mesoporous silicas MCM-41, MCM-41/TMB, SBA-15 and HMS. Similar QE-TPDA profiles of hexane and cyclohexane with a single desorption maximum were observed for the wide pore zeolites. No adsorption of cyclohexane for zeolite 5A and a single desorption maximum for ZSM-5 were found, while two-step desorption profiles of hexane were observed for these zeolites. Similar values of the adsorption enthalpy and entropy of hexane and cyclohexane were obtained by fitting the Langmuir model functions for the zeolites X and Y. For NaMOR and ZSM-5 larger differences in these parameters were found. A single desorption peak found at low temperatures in the QE-TPDA profiles of hexane and cyclohexane for the studied silicas was attributed to the multilayered adsorption on their mesopore surface. The adsorption isobars calculated from the thermodesorption profiles were fitted with the BET function. This way values of the specific surface area and the adsorption heat were calculated. Additionally values of the initial heat of adsorption were found by fitting the Henry’s law to the high-temperature sections of the linearized isobars. The largest deviations from the BET and Henry functions and the largest values of the adsorption heats found for SBA-15 indicated the greatest heterogeneity of the adsorption sites on its surface. pl
dc.subject.en hexane pl
dc.subject.en cyclohexane pl
dc.subject.en adsorption heat pl
dc.subject.en zeolite pl
dc.subject.en mesoporous silica pl
dc.subject.en surface heterogeneity pl
dc.description.volume 19 pl
dc.description.number 2-4 pl
dc.identifier.doi 10.1007/s10450-013-9476-9 pl
dc.identifier.eissn 1572-8757 pl
dc.title.journal Adsorption pl
dc.language.container eng pl
dc.date.accession 2019-05-13 pl
dc.affiliation Wydział Chemii : Zakład Chemii Nieorganicznej pl
dc.subtype Article pl
dc.rights.original CC-BY; inne; ostateczna wersja wydawcy; w momencie opublikowania; 0; pl
dc.identifier.project ROD UJ / P pl
dc.pbn.affiliation USOS1021:UJ.WCh; pl
.pointsMNiSW [2013 A]: 30


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Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa