Vapor—Liquid Equilibria at Low Temperatures: The Carbon Monoxide—Methane System

Abstract

References on the vapor—liquid equilibria of systems containing carbon monoxide have been compiled by Flynn [1]. The thermodynamic properties of mixtures of liquid carbon monoxide and liquid methane have been studied over the complete range of compositions at one temperature, 90.67°K, the triple-point temperature of pure methane [2]. This study indicates that the liquid-phase activity coefficient of carbon monoxide under these conditions assumes the following form:

$$\ln {\gamma _i} = 0.6226X\begin{array}{*{20}{c}} 2 \\ 2 \\\end{array} - 0.0032X\begin{array}{*{20}{c}} 2 \\ 2 \\ \end{array} (1 - 4{X_1})$$

((1))

where γ_i is the activity coefficient of carbon monoxide in liquid, x ₁is the mole fraction of carbon monoxide in liquid, and x ₂ is the mole fraction of methane in liquid.