Showing papers on "BET theory published in 1968"
TL;DR: In this paper, it is shown that it is incorrect to use the multilayer isotherm method of Brunauer, Emmett, and Teller for solids where only little surface area is available.
Abstract: The determination of the surface areas of zeolites is discussed. It is shown that it is incorrect to use the multilayer isotherm method of Brunauer, Emmett, and Teller for solids where only little ...
32 citations
TL;DR: Gas adsorption on solids, discussed statistical mechanical theory assuming localized adlayer and non-localized mobile layer adorption for first ad layer and nonlocalized adlayer on top as discussed by the authors.
19 citations
01 Feb 1968
TL;DR: In this paper, the statistical thermodynamics of adsorption by a multi-component surface was studied on the basis of the BET model, and it was shown that the derived isotherm gives the same expression as the simple summation of the BLEU equation over all kinds of polar sites.
Abstract: In order to explain the low relative vapor pressure region in experimental adsorption isotherms of polar small molecules by polar adsorbents — as is the case with the protein-water system — the statistical thermodynamics of adsorption by a multi-component surface was studied on the basis of the BET model. The derived adsorption isotherm gives the same expression as the simple summation of the BET equation over all kinds of polar sites. The mathematical examination reveals a condition necessary for the approximation of the derived adsorption isotherm to the usual straight “BET” line. Besides, according to the present theory, it is possible to derive the number and weight averages of adsorption energy factors (C of BET theory) by the analysis of low vapor pressure region.
6 citations