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Isothermal activity coefficients for the system cyclohexane— n ‐heptane—toluene at 25°C
Author(s) -
Katayama Takashi,
Sung Edmond K.,
Lightfoot Edwin N.
Publication year - 1965
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690110533
Subject(s) - boiling point , cyclohexane , isothermal process , extrapolation , toluene , chemistry , thermodynamics , diluent , vapor–liquid equilibrium , heptane , ternary operation , boiling , activity coefficient , ternary numeral system , chromatography , organic chemistry , mathematics , physics , aqueous solution , statistics , computer science , programming language , phase (matter)
Isothermal vapor‐liquid equilibrium data at 25°C are presented for the ternary and binary system containing cyclohexane, n ‐heptane, and toluene. These data were obtained by static equilibration in the presence of diluent nitrogen by chromatographic analysis of the saturated vapor. The data obtained were of at least comparable accuracy to those available at the normal boiling point, and the procedure appears to offer several substantial advantages. Neither a priori prediction of activity coefficients from regular solution theory nor extrapolation of data taken at the normal boiling point is a satisfactory substitute for the isothermal data.