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

An extension of the Kierlik-Rosinberg version of density functional theory to the case of a polydisperse fluid of hard spheres in cont act with a sing le wall and also adsorbed in slit-like pores is presented. A comparison wit h Monte Carlo results show that the theory is capable of precisely reproduc ing density profiles of a polydisperse fluid near a hard wall. Several mode l calculations of adsorption in slit like pores are presented. The influenc e of the confinement on the polydispersity, as compared with bulk fluid, is discussed.