Density functional approach to adsorption of a polydisperse fluid in slit-like pores

Abstract

An extension of the Kierlik-Rosinberg version of density functional theory to the case of a polydisperse fluid of hard spheres in contact with a single wall and also adsorbed in slit-like pores is presented. A comparison with Monte Carlo results show that the theory is capable of precisely reproducing density profiles of a polydisperse fluid near a hard wall. Several model calculations of adsorption in slit like pores are presented. The influence of the confinement on the polydispersity, as compared with bulk fluid, is discussed.