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Prediction of ethane and CO 2 solubilities in heavy norma paraffins using generalized‐parameter soave and peng‐robinson equations of state
Author(s) -
Gasem K. A. M.,
Ross C. H.,
Robinson R. L.
Publication year - 1993
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.5450710520
Subject(s) - thermodynamics , bubble point , mole fraction , equation of state , flory–huggins solution theory , chemistry , bubble , phase equilibrium , liquid phase , mathematics , phase (matter) , physics , organic chemistry , mechanics , polymer
A study was made of the abilities of the Soave and Peng‐Robinson equations to represent the phase behavior of ethane + n‐paraffin and CO 2 + n‐paraffin systems. These equations are capable of describing the phase behavior of such systems; however, the level of precision obtained varies with the degree of complexity used in representing the interaction parameters in the mixing rules employed. For ethane/C0 2 with n‐paraffins extending from C 3 to n‐C 44 , an uncertainty of about 1 % is obtained for bubble point pressures (or about 0.005 mole fraction for solubilities) when two system‐specific interaction parameters per isotherm are used. Simple generalized correlations are presented for the equation‐of‐state interaction parameters which allow prediction of the bubble point pressures with an expected uncertainty of about 5.7% (0.014 in mole fraction).