New model that describes adsorption of laterally interacting gas mixtures on random heterogeneous surfaces. 2. Correlation of complex binary and prediction of multicomponent adsorption equilibria

The model developed in part 1 of this series for correlating single compone nt and rather ideal binary adsorption equilibria demonstrated a remarkable ability for correlating complex binary adsorption equilibria, including ads orption azeotropes and sigmoidal-shaped x-y diagrams, using a single binary fitting parameter. This model was also extended successfully for predictin g multicomponent adsorption equilibria on a heterogeneous adsorbent surface with a uniform distribution of Henry's law constant using single component adsorption isotherm parameters, along with one binary fitting parameter fr om each of the binary pairs in the multicomponent mixture. Overall, the res ults from this new model generally showed a marked improvement in the corre lation of binary and prediction of multicomponent adsorption equilibria com pared to that obtained with the multicomponent Langmuir model, which used o nly single component isotherm parameters, and compared to that obtained wit h two-dimensional fluid and loading ratio correlation models that also util ized binary fitting parameters.