INVESTIGADORES
ZABALOY Marcelo Santiago
congresos y reuniones científicas
Título:
THE INFLUENCE OF TERNARY INTERACTION PARAMETERS ON THE REPRESENTATION OF THE HIGH-PRESSURE FLUID PHASE EQUILIBRIA OF TERNARY SYSTEMS
Autor/es:
G. PISONI; M. CISMONDI; M.S. ZABALOY
Lugar:
NATAL, BRAZIL
Reunión:
Conferencia; PROSCIBA 2010: II Iberoamerican Conference on Supercritical Fluids.; 2010
Institución organizadora:
Universidade Federal do Rio Grande do Norte – UFRN
Resumen:
Models of the equation of state (EOS) type, used for describing fluid phase equilibria, typically assume that the system behavior can be described from binary contributions only. This is not enough for obtaining good predictions for the high-pressure phase equilibria of ternary highly non ideal systems. On the other hand, cubic mixing rules (CMRs) provide both, binary and ternary interaction parameters. By fitting such ternary parameters, it is possible to improve the reproduction of ternary experimental data while leaving invariant the description of the three constituent binary subsystems. In this work, we test the CMRs approach by studying the system Carbon Dioxide + n-Hexadecane + 1,8-Octanediol, for which we have available both, binary and ternary phase equilibrium data. For such system, we show the influence of the ternary parameters on the size of ternary two-phase and three-phase immiscibility regions. We also consider the effect of predicted values of the ternary parameters, which we need when ternary experimental data are not available. We use in this study the the Peng-Robinson (PR) EOS and reach conclusions on how the PR-EOS compares to the RK-PR EOS, when both EOSs are coupled to CMRs.