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Measurement and calculation of critical points for binary and ternary mixtures
Author(s) -
Horstmann Sven,
Fischer Kai,
Gmehling Jürgen
Publication year - 2002
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690481024
Subject(s) - ternary operation , thermodynamics , binary number , chemistry , propane , ternary numeral system , equation of state , binary system , group contribution method , phase equilibrium , phase (matter) , organic chemistry , physics , mathematics , arithmetic , computer science , programming language
The critical lines (temperatures and pressures) for the three binary mixtures ethane + sulfur hexafluoride (SF 6 ), SF 6 + propane, and carbon dioxide (CO 2 ) + SF 6 , and the critical surface for the ternary system CO 2 + ethane + SF 6 were determined experimentally by a flow method. The binary data were compared to predictions using the predictive Soave‐Redlich‐Kwong (PSRK) group contribution equation of state (EoS). For the system CO 2 + SF 6 , where no phase equilibrium information is available, the critical points were used to optimize the required PSRK group interaction parameters. Using these binary parameters, the ternary critical plane was predicted reliably.