In this paper, we proposed an approach to understand the mechanism of
gas adsorption in a microporous solid. This approach is deduced from the
concept of flow; the flow of the quantity of material which crosses a closed
surface is proportional to the potential adsorbate-adsorbent interaction. For
this first study, we used two couples; activated carbon AC35 with ethanol and
acetone at the same temperature 30 ? C, in order to over complicate the issue
for this first approach. Our study of the adsorption potential as a function of
the pore radius allowed us to show that there are two types of interaction
forces. The first type active, as in the case of adsorption in micropores and
mesopores, and the second is active, as for the macropores and side surfaces of
the grains. These findings justify the existence of two models: the
Dubinin-Astakov (filling volume), and the Brunauer, Emmet and Teller
(adsorption layer). Adsorption follows three steps, the micropore filling will
occur the first followed by the filling of mesopores and the macropores and
finally the surface adsorption corresponds to the side surface of the
microporous solid grains. The order in which the filling pore has allowed us to
establish the link between the time parameter and the pore radius - See moreat:
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