Equilibrium-phase properties of isobutane-carbon dioxide system

Abstract

Vapor and liquid equilibrium-phase compositions and refractive indices were determined for the /-butanecarbon dioxide system at 100°, 160°, 220°, and 250°F from the vapor pressure of /-butane to pressures in the critical region. The equilibrium ratios for each component were calculated at each temperature from the phase composition data. The equilibrium-phase densities were calculated from the measured phase composition and refractive index data by use of the Lorentz-Lorenz molar refractivity relationship.

Equilibrium phase properties of the toluene-hydrogen sulfide and heptane-hydrogen sulfide binary systems

“…The molar volumes of the equilibrium phases reported at the three lower temperatures in Table I were calculated from the measured phase compositions and refractive indices using the Lorentz-Lorenz molar refractivity relationship as explained in the earlier papers by Besserer and Robinson (2,3). The molar refractivity is expressed in terms of the refractive index and molar density as follows: The errors in the vapor molal volumes may be somewhat higher in regions where the refractive index approaches unity.…”

“…Samples of the vapor phase were obtained from the variable volume cell using the technique explained by Besserer and Robinson ( 2 ,3) and from the constant volume cell using a specially designed valve described by Kalra and Robinson (8). Samples of the liquid phase from the variable volume cell were obtained by trapping a sample of the equilibrium liquid in one chamber of a four-way ball valve and then vaporizing it into a stream of circulating hot helium.…”

Effect of substance‐dependent Ωac on vapor‐liquid equilibrium calculations

“…The effect of k, values on VLE calculations was first considered using an R,, value of 27/64. The VLE values for the system COz-i-C4 (Besserer and Robinson, 1973), which could be approximated by Equation (1); and those for the system N2-C2 (Stryjek et al, 1974), which could not be well represented by Equation (1); were selected for the discussion.…”

Monte Carlo predictions for the phase behavior of H2 S+n-alkane, H2 S+CO2, CO2+CH4 and H2 S+CO2+CH4 mixtures

“…Mixtures of CO 2 and n-alkanes have been studied extensively both by experiment (71)(72)(73)(74)(75)(76)(77)(78) and more recently through Monte Carlo simulations (34,47,(79)(80)(81)(82). In Fig.…”