STRUCTURE AND ADSORPTION OF A HARD-SPHERE FLUID IN A CYLINDRICAL AND SPHERICAL PORE FILLED BY A DISORDERED MATRIX - A MONTE-CARLO STUDY

We have studied a model of a hard sphere fluid adsorbed in a cylindric al and spherical pore filled with a quenched disordered matrix of hard sphere particles using Grand canonical Monte Carlo simulations. The i nteractions of both matrix and fluid species with pore walls are assum ed to be of a hard sphere type. We discuss the adsorption isotherms an d density profiles of fluid particles in pores with different micropor osities for several values of pore radius. We have observed that, simi lar to homogeneous microporous media, the adsorption increases with in creasing porosity. However, trends of behavior of the isotherms also r eflect layering of adsorbed fluid. The data obtained serve as a benchm ark for the development of the theory of confined quenched-annealed sy stems and for computer simulation investigation of models permitting p hase transitions in pores.