A Model to Describe Adsorption Isotherms

A plot of the excess surface work that is the product of the adsorbed amount and the change in chemical potential versus the adsorbed amount yields a minimum at the monolayer capacity which is attributed to the first adsorbed molecular layer. The second parameter obtained is the change in chemical p...

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Bibliographic Details
Published inJournal of colloid and interface science Vol. 180; no. 1; pp. 70 - 76
Main Authors Adolphs, Jürgen, Setzer, Max Josef
Format Journal Article
LanguageEnglish
Published San Diego, CA Elsevier Inc 01.06.1996
Elsevier
Subjects
adsorption
chemical potential
Chemistry
Exact sciences and technology
excess surface work
General and physical chemistry
General, apparatus
monolayer
Surface physical chemistry
thermodynamics
thermodynamics
adsorption
monolayer
excess surface work
chemical potential
Theoretical study
Monolayer
Chemical potential
Models
Thermodynamic properties
Adsorption isotherm
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Summary:A plot of the excess surface work that is the product of the adsorbed amount and the change in chemical potential versus the adsorbed amount yields a minimum at the monolayer capacity which is attributed to the first adsorbed molecular layer. The second parameter obtained is the change in chemical potential where adsorption sets in. An integral evaluation gives a linearized form from which both parameters can be found from slope and intercept. The model can be used for adsorption from gas and liquid phases. Regarding the precision and range of validity, the model is an improvement on other methods, especially the BET method.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.1996.0274