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Experimental determination of P‐X, L=G critical locus and UCEP for Biphenyl‐Co 2 mixtures
Author(s) -
Zhang D.,
Wang L.,
Sheng W.,
Lu B. C. Y.
Publication year - 1991
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.5450690617
Subject(s) - solubility , isothermal process , biphenyl , mole fraction , thermodynamics , chemistry , binary number , critical point (mathematics) , relative standard deviation , analytical chemistry (journal) , chromatography , organic chemistry , physics , mathematics , mathematical analysis , arithmetic , detection limit
Solubility of CO 2 in biphenyl was measured isothermally at three temperatures at pressures up to the liquid‐gas critical points. A cross‐over region where the solubility isotherms converged was observed at a pressure of about 36 MPa. The upper critical end point (UCEP) for the binary mixture was established to be 328.5 K, 48.5 MPa and 0.18 mole fraction of biphenyl by means of an intersection method. In addition, the solubility data were correlated by means of the Peng‐Robinson (1976) equation using three different sets of mixing rules. The calculated results indicate that the mixing rule proposed by Schwartzentruber et al. (1987) yields the lowest deviation.