Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

The solubilities of carbon dioxide (CO2) in decane, tetradecane and their binary mixtures have been measured at a temperature of 373.2 K and pressures up to 6 MPa using a rocking mechanism pressure volume temperature apparatus. The measurements presented in this paper were undertaken to determine the solubility and liquid saturated properties (density and viscosity) when a liquid hydrocarbon (decane, tetradecane and their mixtures) was saturated with CO2. The generated data for compositions and densities were correlated with the Soave- Redlich-Kwong and Peng-Robinson equations of state (EOSs). The binary interaction parameters were adjusted, and the volume translation technique was employed to correlate the experimental compositions and densities. The generated ternary data were correlated with the adjusted binary parameters from the data of binary pairs (CO2 + decane) and (CO2 + tetradecane). The calculated ternary compositions were found to be in good agreement with the experimental data using the binary parameters from the data of binary pairs for both EOSs. The results for the density of the saturated liquid phase indicated that volume translation should be applied to all components in the binary and ternary systems to accurately describe the saturated liquid densities for mixtures.