Calculation of the equilibrium and transport characteristics of gaseous and liquid mixtures of noble gases in complex narrow-pore systems

Abstract

The molecular-kinetic theory of transfer of the components of the gaseous and liquid mixtures of inert gases is generalized to the case of narrow pores of complex structure. The theory is based on the latticegas model, which provides a self-consistent method for calculating the equilibrium and transport characteristics of noble gases and liquids. This model is used to describe the supramolecular structure of finely dispersed bodies and to calculate the distributions of the mixture components within the pore space. The supramolecular structure is composed of slitlike, cylindrical, spherical, and globular model elements and their joints. An analysis of the effect of the molecular properties of the mixture components, physicochemical properties of the pore walls and the width of the cylindrical and complex sections of variable diameter of spherocylindrical pores on the concentration dependences of the local label transfer coefficients and viscosity coefficients for mixtures of spherical molecules at supercritical temperatures range is performed. Correlations between the partial degrees of filling of pores with mixture components and the local dynamic characteristics of the mixture in the spherocylindrical systems are considered. It is shown that an increase in the binding energy increases the local flow viscosity and reduces the diffusion coefficients of the labeled mixture components.