Open AccessApplication of the Dubinin–Astakhov Equation to the Study of the Geometric Structure, Energetic Surface Heterogeneity and Surface Topography of Carbonaceous Adsorbents
Author(s) -
W. Rudziński,
Krzysztof Nieszporek,
A. Dąbrowski
Publication year - 1993
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1177/0263617499010001-405
Subject(s) - adsorption , chemistry , gaussian , thermodynamics , surface (topology) , sorption isotherm , surface energy , computational chemistry , physics , geometry , mathematics
The new theoretical approach to multisite-occupancy adsorption on heterogeneous surfaces, developed recently by Rudziński and Everett, is generalized for the case of adsorption systems characterized by non-Gaussian adsorption energy distributions. Attention is focused on the adsorption energy distribution which, in the case of one-site-occupancy adsorption, leads to the Dubinin–Astakhov isotherm equation. In effect, a generalized form of that isotherm equation is developed for the common case of multisite-occupancy adorption in actual adsorption systems. The generalized equation is sensitive to surface topography; hence, fitting it to experimental adsorption isotherms creates a chance to study the surface topography of carbonaceous surfaces. An example of such computer exercises is reported here before a more systematic study is published.