Vapor-liquid equilibrium data for nitrogen-argon-oxygen mixtures. Evaluation and correlation

Abstract

Vapor-liquid equilibrium data available in the literature for binary and ternary mixtures of nitrogen, argon, and oxygen were tested and screened over the range of temperature from 90°to 120°K. Activity coefficients for the consistent isothermal binary data were correlated by means of the Redlich-Kister equation. The binary constants were successfully employed for predicting the ternary data, without including any ternary constants. Good agreement was obtained between the predicted and the experimental data of Wilson and of Narinskii.