%0 Journal Article
%A Foued, Mhiri
%A Jemnia, Abdelmajid
%D 2010
%I Begell House
%K adsorption, diffusion, fluctuation, Fik's law
%N 4
%P 295-305
%R 10.1615/JPorMedia.v13.i4.10
%T KINETIC STUDY FOR THE ADSORPTION OF ACATONE AND ETHANOL ON ACTIVATED CARBON
%U http://dl.begellhouse.com/journals/49dcde6d4c0809db,17b74a2d663d085d,7d8b5b2f67936fe3.html
%V 13
%X Gas adsorption in a microporous solid takes place in three locations: the micropores, the mean pores, and the exterior surface of solid grains. Usually, the mathematical description of the kinetics of such a phenomenon needs a detailed preliminary study of the physical and chemical properties of the adsorbent-adsorbate pair. This article proposes a new mathematical model for the study of the adsorption kinetics. In such a model, the adsorbent-adsorbate system is assumed to be a black box, where we know only the adsorbate instantaneous quantities at the input and the output as well as the used adsorbent mass. This model presents some advantages as it contains only three constants to be determined experimentally. It does not require the chemical and the physical properties of the adsorbent-adsorbate pair, and the phenomenon is described by only one differential equation. This is due to the introduction of two new terms in Tick's law, which are justified by the application conditions of such a law and which are not verified in the case of the gas adsorption in a microporous solid. The first term added is a direct adsorption term corresponding to adsorption in the mean or large pores and to the outward surface. As for the second term, it corresponds to the fluctuation defining the transportation phenomenon presented in classical physics.
%8 2010-04-15