Jk. Garbacz et al., EQUATION OF PHYSICAL ADSORPTION ON A HOMOGENEOUS SURFACE-BASED ON A 2-DIMENSIONAL ANALOG OF THE BEATTIE-BRIDGEMAN EQUATION OF A REAL-GAS STATE, Colloids and surfaces. A, Physicochemical and engineering aspects, 119(2-3), 1996, pp. 215-220
The equation of monolayer physical adsorption on a homogeneous surface
based on the two-dimensional analog of the Beattie-Bridgeman equation
of a real gas state has been formulated. On the basis of the isotherm
obtained, the relation describing the dependence of isosteric adsorpt
ion heat on surface coverage has been evaluated. The number of paramet
ers in the two-dimensional state equation was reduced to three. This w
as possible due to the application of the hard-disc fluid concept. The
relations obtained describe experimental adsorption isotherms and the
energetics of adsorption processes at low coverages; the correlation
between experimental and theoretical data is satisfactory. Application
of Student's test indicates that the parameters of the model which ar
e independent theoretically are also independent in practice.