ADSORPTION OF FLUIDS IN CONFINED DISORDERED MEDIA FROM INHOMOGENEOUS REPLICA ORNSTEIN-ZERNIKE EQUATIONS

The density distribution and pair distribution function for a fluid ad sorbed in a slitlike pore filled with a quenched hard-sphere fluid hav e been investigated using the inhomogeneous replica Ornstein-Zernike e quations. The one-particle and two-particle functions are related via Born-Green-Yvon equation and the inhomogeneous Percus-Yevick approxima tion is used. The effect of the matrix is to lower the amount of adsor bed fluid in the entire pore at low chemical potentials. For high valu es of the fluid chemical potential, layering of adsorbed fluid is obse rved. The solution of the problem is important for gel-exclusion chrom atography and in separation science.