Replica Ornstein-Zernike theory for chemically associating fluids with directional forces in disordered porous media: Smith-Nezbeda model in a hard sphere matrix

The associative replica Ornstein-Zernike equations, supplemented by the associative hypernetted chain approximation are used to describe the Smith-Nezbeda model for an associating fluid adsorbed in a disordered hard sphere matrix. These equations have been developed by combining the replica Ornstein-Zernike equations with the Wertheim theory of association in fluids. The pair distribution functions and fraction of unbonded species are;calculated. Also investigated is the influence of the association on the equation of state a nd the chemical potential of the absorbed fluid.