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Phase equilibria predictions for the CO 2 ‐H 2 O‐NaCl‐bitumen system
Author(s) -
Nighswander John A.,
Kalogerakis Nicolas,
Mehrotra Anil K.
Publication year - 1990
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450680322
Subject(s) - asphalt , phase (matter) , salt (chemistry) , henry's law , thermodynamics , chemistry , binary system , liquid phase , liquid liquid , equation of state , binary number , analytical chemistry (journal) , mineralogy , materials science , chromatography , organic chemistry , solubility , physics , mathematics , arithmetic , composite material
Predictions of vapour‐liquid, liquid‐liquid and vapour‐liquid‐liquid phase equilibria are presented for the quaternary CO 2 ‐H 2 O‐NaCI‐Peace River bitumen system at reservoir conditions. Henry's law correlations are regressed from available data for the CO 2 ‐H 2 O, CO 2 ‐(H 2 O + NaCl) and CO 2 ‐bitumen binary sub‐systems. These correlations are incorporated into a model for predicting the phase behaviour of the quaternary system at temperatures of 80‐200°C, NaCl concentrations of 0‐10.5 mass% and pressures up to 10 MPa. It is shown that temperature, salt concentration and the global CO 2 concentration significantly affect the distribution of CO 2 in the liquid‐liquid region. The proposed model is simple and computationally less demanding than those based on equations of state.