The I-point method for estimating the surface area of solid catalysts and the variation of C-term of the BET equation

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dc.contributor.authorPomonis, P. J.en
dc.contributor.authorPetrakis, D. E.en
dc.contributor.authorLadavos, A. K.en
dc.contributor.authorKolonia, K. M.en
dc.contributor.authorPantazis, C. C.en
dc.contributor.authorGiannakas, A. E.en
dc.contributor.authorLeontiou, A. A.en
dc.date.accessioned2015-11-24T16:50:50Z
dc.date.available2015-11-24T16:50:50Z
dc.identifier.issn1566-7367-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/9650
dc.rightsDefault Licence-
dc.subjectsurface areaen
dc.subjectbet equationen
dc.subjectbet-scatchard plotsen
dc.subjecti-point methoden
dc.titleThe I-point method for estimating the surface area of solid catalysts and the variation of C-term of the BET equationen
heal.abstractThe BET equation rearranged in the form [V(1 - P)]/P = CVm - (C - 1)[V(1 - P)] was used for the calculation of specific surface areas of porous catalysts and the variation of C-term during the progress of adsorption. This novel method employs plots of [ V(1 - P)]/P vs. [V(1 - P)] which provide inclined-V type lines with an inversion point termed I-point. This I-point corresponds exactly to V(1 - P) = V-m, i.e., the volume of nitrogen necessary for the formation of a monolayer. The slope of the plots corresponds to (C - 1) from which the values of C can be estimated in the whole range 0 < P < 1. As the I-point is approached, the C values approach the C-BET values calculated from the classical linear BET plots. The free energy of adsorption in the whole range 0 < P < 1 can be also estimated from the relationship RTln C. (C) 2004 Elsevier B.V. All rights reserved.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.primaryDOI 10.1016/j.catcom.2004.11.006-
heal.identifier.secondary<Go to ISI>://000226479000018-
heal.identifier.secondaryhttp://ac.els-cdn.com/S1566736704002250/1-s2.0-S1566736704002250-main.pdf?_tid=c10ac10feac52c1348aed24d89f42c0d&acdnat=1333035686_76d151ee7f6d231c72cd3a8417c034a1-
heal.journalNameCatalysis Communicationsen
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2005-
heal.publisherElsevieren
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείαςel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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