Equilibrium Phase Densities, Vapor Phase Compositions, and Interfacial Tensions for the Methane + Ethane + n-Pentane System at 294.15 K

Abstract

The equilibrium phase densities, vapor phase compositions, and interfacial tensions of the ternary mixture (methane + ethane + n-pentane) have been measured simultaneously using the pendant drop technique at 294.15 K. The total mole compositions of the measured ternary mixtures are 50.61 % methane + 8.93 % ethane + 40.46 % n-pentane; 34.20 % methane + 6.04 % ethane + 59.76 % n-pentane; and 17.46 % methane + 3.08 % ethane + 79.40 % n-pentane, respectively. The measured phase densities and vapor phase compositions are compared with calculated equilibrium properties from the GERG2004 equation. No open interfacial tension data for these ternary systems have been reported at any isothermal conditions. The average experimental interfacial tension data can be described with the total deviations of about 3.2 %. The combined standard uncertainty at each experimental condition is calculated on the basis of ISO recommendations.

Effects of Temperature and Pressure on Interfacial Tensions of Fluid Mixtures. II. Propane/n-Pentane and Propane/n-Hexane Binaries

“…4 Despite its importance, measured IFT values have been reported only for a limited number of n-alkane mixtures in the literature, including methane/propane, 6,7 methane/butane, 8 methane/pentane, 5 methane/hexane, 9,10 methane/heptane, 3,5,9 methane/octane, 11 methane/decane, 5,8,12,13 ethane/n-pentane, 14 ethane/hexane, 10 butane/decane, 15 methane/propane/n-decane, 16 and methane/ethane/n-pentane. 17 In our study, we measured IFTs of other binary mixtures of n-alkanes over wide ranges of pressure and temperature that have not been previously reported. In the following sections, we present details of materials and methods used in the measurements and the results and associated discussion.…”

“…For example, IFT controls the efficiency of heat and mass transfer operations since it is one of the properties that affects the absorption of gas into liquid . Despite its importance, measured IFT values have been reported only for a limited number of n -alkane mixtures in the literature, including methane/propane, , methane/butane, methane/pentane, methane/hexane, , methane/heptane, ,, methane/octane, methane/decane, ,,, ethane/ n -pentane, ethane/hexane, butane/decane, methane/propane/ n -decane, and methane/ethane/ n -pentane …”