BUBBLE POINT PRESSURES OF SOME SELECTED CARBON-DIOXIDE PLUS SYNTHETICC6+ MIXTURES

In this work, the bubble points of some selected synthetic C6+ mixture s were measured in the presence of carbon dioxide. In all the systems, the composition of carbon dioxide was kept about 25 mol %. Measuremen ts were carried out in the Cailletet apparatus within a temperature ra nge of 312 K to 470 K. In addition, the ability of the Peng-Robinson e quation of state (PR EOS) in correlating the phase behavior of CO2 + C 6+ fractions was investigated, by correlating the bubble points of exp erimented systems using this equation of state. To increase the accura cy of the correlations, suitable binary interaction parameters between each component of the C6+ mixture and carbon dioxide were determined, which minimized the difference between correlated and experimental bu bble point pressures. Average absolute deviations between experimental and predicted data are less than 2.1% in all the systems.