Monday 30 May 2016

STUDY OF THE ADSORPTION INTERACTION POTENTIAL IN A MICROPOROUS SOLID.

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: 

No comments:

Post a Comment