Adsorption isotherms of gases in porous solids

By the application of classical statistical mechanics, a new equation deecribing the adsorption iaotheraul for goose in porous solids is described as the phase equilibrium between a free gas phase, a compressed gas phase and an adsorbed gas phase in a closed system. Here the properties of adsorbed gas molecules above the first layer on the pore surface are approximated as those of a liquid, that is, the chemical potential and density of adsorbed gas molecules above the first layer are approximated as those of the liquid. This description of the adsorbed molecules is shown not only to describe adsorption data very well, but also to offer a means of explaining phenomena such as film transport and anomalous viscosities of gases in small pores or capillaries.