Competitive adsorption of a two-component gas on a deformable adsorbent

We investigate the competitive adsorption of a two-component gas on the surface of an adsorbent whose adsorption properties vary due to the adsorbent deformation. The essential difference of adsorption isotherms for a deformable adsorbent both from the classical Langmuir adsorption isotherms of a tw...

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Bibliographic Details
Published in:Physica scripta 2014-06, Vol.89 (6), p.65701-23
Main Author: Usenko, A S
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Asymptotes
Bistability
Deformation
Formability
Isotherms
Surface chemistry
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Summary:We investigate the competitive adsorption of a two-component gas on the surface of an adsorbent whose adsorption properties vary due to the adsorbent deformation. The essential difference of adsorption isotherms for a deformable adsorbent both from the classical Langmuir adsorption isotherms of a two-component gas and from the adsorption isotherms of a one-component gas is obtained, taking into account variations in the adsorption properties of the adsorbent in adsorption. We establish bistability and tristability of the system caused by variations in adsorption properties of the adsorbent in competitive adsorption of gas particles on it. We derive conditions under which adsorption isotherms of a binary gas mixture have two stable asymptotes. It is shown that the specific features of the behavior of the system under study can be described in terms of a potential of the known explicit form.
ISSN:0031-8949
1402-4896
DOI:10.1088/0031-8949/89/06/065701