Energetic Classification of Adsorption Isotherms

The new model describes adsorption isotherms with a two-parameter function. The parameters are easy and precise to calculate from the excess surface work of the adsorbed layer. The excess surface work is defined as the product of adsorbed amount and the change of the chemical potential. The differen...

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Published in:Journal of colloid and interface science 1996-12, Vol.184 (2), p.443-448
Main Authors: Adolphs, Jürgen, Setzer, Max Josef
Format: Article
Language:English
Subjects:
adsorption
chemical adsorption
chemical potential
Chemistry
energetic classification
Exact sciences and technology
excess surface work
General and physical chemistry
monolayer
physical adsorption
Solid-gas interface
Surface physical chemistry
theory
thermodynamics
two-dimensional gas
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container_title Journal of colloid and interface science
container_volume 184
creator Adolphs, Jürgen
Setzer, Max Josef
description The new model describes adsorption isotherms with a two-parameter function. The parameters are easy and precise to calculate from the excess surface work of the adsorbed layer. The excess surface work is defined as the product of adsorbed amount and the change of the chemical potential. The differential form yields a minimum at the first layer. It is possible to linearize the corresponding integral form. The physical meanings of the two parameters are the monolayer capacity and the chemical potential, which is necessary for adsorption. The new model allows an energetic classification of adsorption phenomena of surface films in the energetic range from weak physisorption to chemical adsorption
doi_str_mv 10.1006/jcis.1996.0639
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source ScienceDirect Journals
subjects adsorption
chemical adsorption
chemical potential
Chemistry
energetic classification
Exact sciences and technology
excess surface work
General and physical chemistry
monolayer
physical adsorption
Solid-gas interface
Surface physical chemistry
theory
thermodynamics
two-dimensional gas
title Energetic Classification of Adsorption Isotherms
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