Resumo (PT):
Abstract (EN):
t The Langmuir equation is one of the most successful adsorption isotherm equations, being widely used to
fit Type I adsorption isotherms. In this article we show that
the kinetic approach originally used by Langmuir for 2D
monolayer surface adsorption can also be used to derive a
1D analogue of the equation, applicable in ultramicropores
with single-file diffusion. It is hoped that such a demonstration helps dispel the idea that the Langmuir isotherm
equation cannot apply to some micropores as more than a
mathematical correlation. We furthermore seek to extend
the insight provided by the simple kinetic derivation of the
Langmuir equation to other isotherm equations capable of
modelling Type I isotherms. The same kinetic approach is
thus also used to derive the Volmer, Fowler–Guggenheim
and Hill–de Boer equations, both for surface (2D adsorbed
phase) and micropore adsorption (1D and 3D adsorbed
phases). It is hoped that this will help make more intuitively clear that these equations can be used as phenomenological models in some instances of adsorption in
micropores
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
9