Title of article
The Modification of the BET Surface Area by Considering the Excluded Area of Adsorbed Molecules
Author/Authors
Peyrovi, M.H Department of Computational and Physical Chemistry - Faculty of Chemistry and Petroleum Sciences - Shahid Beheshti University - Tehran, Iran , Abolhassanzadeh Parizi, M Department of Computational and Physical Chemistry - Faculty of Chemistry and Petroleum Sciences - Shahid Beheshti University - Tehran, Iran
Pages
5
From page
173
To page
177
Abstract
The BET method is known as the conventional method for surface area measurements. Surface area is determined using the linearized
form of the BET equation to calculate the volume of the adsorbed gas in the monolayer. An adsorbed molecule occupies an area that is
inaccessible to other molecules on the surface. Taking this into account, this study reports on a correction factor k´, as the ratio of van der
Waals constant (b) and the molar volume of the liquid (v - ), that corrects the monolayer volume of the adsorbed gas obtained from the BET
model. The obtained correction factor will increase as the size of the molecule increases.
Keywords
Excluded area , BET isotherm , Specific surface area , Surface area determination , Monolayer capacity , Excluded volume
Journal title
Physical Chemistry Research
Serial Year
2022
Record number
2696602
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