Multilayer adsorption of gases in solids

Adsorption phenomena of gas in solids are investigated using the Ono–Kondo lattice model. Layer concentrations ρn (n=1, 2, … L) and Gibbs adsorption Γ are presented versus the bulk density ρb and temperature. It is found that the density in core region (inner layers) and the density of the first layers next to the walls exhibit an opposite temperature dependence: while the density near the walls increases with decreasing temperature the density of the core region decreases to reach ρb as T increases. The density profile of the layers is also presented.