Critical Anomalies and Phase Diagrams of a Binary Mixture

M. Yu. Belyakov; Беляков М. Ю.

doi:10.31857/S0040364423020023

Critical Anomalies and Phase Diagrams of a Binary Mixture

Authors: Belyakov M.Y.¹
Affiliations:
1. Institute of Oil and Gas Problems, Russian Academy of Sciences
Issue: Vol 61, No 2 (2023)
Pages: 198-204
Section: Thermophysical Properties of Materials
URL: https://rjsvd.com/0040-3644/article/view/653132
DOI: https://doi.org/10.31857/S0040364423020023
ID: 653132

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Abstract

The study examines the behavior of a binary mixture in the vicinity of the liquid–vapor critical point. It is shown that the pressure dependence on density along the critical isotherm, predicted within the framework of the existing theory of critical phenomena, does not match the shape of the dew-bubble curves. The problem is analyzed with the equation of state for a multicomponent near-critical mixture, adapted to describe thermophysical properties of a binary mixture. To eliminate the problem it is proposed to impose an additional condition on the equation of state coefficient. Possible consequences of imposing such a condition are considered.

About the authors

M. Yu. Belyakov

Institute of Oil and Gas Problems, Russian Academy of Sciences

Author for correspondence.
Email: belyakov@ogri.ru
Moscow, Russia

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