Halkin V. Liquid-vapor phase equilibrium of binary mixtures of air components

Thesis research is devoted to the study and analytical description of the liquid - vapor phase equilibrium in binary mixtures of air components, the equation to calculate the properties of such mixtures. All air component mixtures were divided into three groups: major air components including nitrogen and oxygen mixtures; mixtures of inert gases; mixtures comprising as a component carbon dioxide or methane. For these mixtures, the methods of obtaining experimental data of the liquid-vapor phase equilibrium parameters were reviewed. On the basis of the available experimental data, forms and complex equation were developed to calculate the liquid-vapor phase equilibrium for 22 binary mixtures of air components over a wide range of parameters. The method of assembly and choice of equation for calculating the liquid-vapor phase equilibrium in binary mixtures of air components is described. Because the pressure dependence of the binary mixture in the phase equilibrium state on temperature and composition is complex, two forms of equations are described that depend on the experimental data with sufficient accuracy, depending on the values of the mixture temperature and the critical temperatures of the components. These equations reflect the pressure of the liquid or vapor as a function of temperature and composition.