Vapor-liquid equilibria of ternary mixtures in the critical region on paths of constant temperature and overall composition

High-pressure vapor liquid equilibrium (VLE) data for the ternary mixture ethane +n-butane +n-pentane due to Thodos and co-workers have been correlated by a ternary version of the modified Leung Grifiths model. Data were taken along paths of constant temperature and approximately constant overall composition, and a separate test was made for such constancy. Seventeen different specified overall compositions at four dilTerent temperatures were correlated. In general, agreement between the correlation and data is very good, particularly for those curves that satisfy the test for constant overall composition. The ternary model has been constructed from correlations of each of the three constituent binaries without any further adjustable parameters.Paper presented at the Twelfth Symposium on Thermophysical Properties, June 19–24, 1994. Boulder, Colorado, U.S.A.