Adsorption of Real Gases in Multimolecular Layers

In this paper, we propose to depict the interaction between gas molecule by Lennard-Jones potential, and to study adsorption by the application of physico-mechanics, from which we deduce the adsorption isotherm equation; we also point out that it become the adsorption isotherm equation of BET, when intermolecular forces can be negligible. The micropic expression of the constant C in both adsorption isotherm is deduced, too.