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Sensitivities in representing the phase behaviour of gas‐bitumen systems
Author(s) -
Fu C.T.,
Puttagunta V. R.,
Hsi C.
Publication year - 1987
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.5450650217
Subject(s) - asphalt , thermodynamics , maxima and minima , equation of state , sensitivity (control systems) , phase (matter) , phase equilibrium , materials science , chemistry , mathematics , physics , engineering , organic chemistry , mathematical analysis , composite material , electronic engineering
Two well‐known cubic equations of state (PR and MSRK) were used to test the sensitivity in predicting the vapour‐liquid equilibrium (VLE) properties of gas‐bitumen mixtures using a set of published critical parameters for bitumen. The predicted results were inconsistent and indicated the need to develop critical parameters that reflect compositional variations in bitumens. Sensitivity studies were also conducted using critical parameters developed by correlations based on compositional analyses of bitumens. It was shown that with these new parameters, both equations of state predict reliable VLE compositions and liquid phase densities. It was also found that there are minima in the critical temperature and critical pressure for the Athabasca bitumen, indicating that the new parameters are closer to the “true” values.