Statistical interpretation of the Dubinin-Radushkevich equation

A statistical approach was applied to describe the model of a homogeneous m icroporous adsorbent and obtain the dependences of the thermodynamic functi ons on the number of molecules and the temperature for molecular aggregates in discrete micropores over a wide region of fillings that lead to the Dub inin-Radushkevich equation. The energy nonuniformity of the adsorption spac e is the fundamental property of carbon adsorbents. In the region of small fillings, the statistical approach leads to Henry's law and the finite valu e of the initial differential energy of adsorption. The value of sorption c orresponding to the saturated vapor pressure decreases with increasing temp erature, but the decrease is considerably less than for the density of the corresponding liquid.