DESCRIPTION OF PHASE EQUILIBRIUM IN BINARY MIXTURES CONTAINING RARE GASES, NITROGEN OR OXYGEN

Abstract

Equations for calculation of phase equilibrium in binary mixtures containing two rare gases or one rare gas and nitrogen or oxygen were composed. Equations describe the pressure of liquid or vapor phases as function of temperature and composition. Their coefficients were determined on the basis of experimental p,T,x- and p,T,y-data for mixtures argon-nitrogen at temperatures 77…120 K, argon-oxygen at 80…120 K, argon-helium at 91…115 K, argon-neon at 100…120 K, krypton-oxygen at 95…150 K and krypton-xenon at 150…170 K. Equations describe experimental values of pressure of liquid phase with root mean square deviations 0,4…2,4 % and of vapor phase with deviations 0,5…3,8 %.They allow also to determine composition of phases at given values of pressure and temperature or temperature of phases at given values of pressure and composition.