Self-diffusion, mass transfer, and viscosity coefficients for a binary mixture in narrow slit-like pores

Abstract

The concentration dependences of the dynamic characteristics of a binary mixture in narrow slit shaped pores of different widths are considered. The local and mean partial self diffusion, label transfer, mass transfer (mutual diffusion), and shear viscosity coefficients for binary mixtures of various compositions were calculated. The calculation was based on the lattice gas model in the quasichemical approximation for spherical components with approxi mately the same size. The calculation of dynamic characteristics took into account collisions between the molecules that determine the direction of their motion. All the kinetic coefficients depend substantially on the mixture density, the direction of motion, and the distance to the pore wall. The effect of the pore width on the calculated dynamic characteristics is considered.