Premium
Description of the mutual solubilities of fatty acids and water with the CPA EoS
Author(s) -
Oliveira M. B.,
Pratas M. J.,
Marrucho I. M.,
Queimada A. J.,
Coutinho J. A. P.
Publication year - 2009
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.11766
Subject(s) - chemistry , fatty acid , thermodynamics , solubility , phase (matter) , phase equilibrium , binary number , chromatography , organic chemistry , mathematics , physics , arithmetic
Data for the mutual solubilities of fatty acid + water mixtures are scarce and so measurements for seven fatty acid (C 5 ‐C 10 , C 12 ) + water systems were carried out. This new experimental data was successfully modelled with the cubic plus association EoS. Using data from C 6 to C 10 and the Elliot's cross‐associating combining rule a correlation for the k ij binary interaction parameter, as a function of the acid chain length, is proposed. The mutual solubilities of water and fatty acids can be adequately described with average deviations inferior to 6% for the water rich phase and 30% for the acid rich phase. Furthermore, satisfactory predictions of solid‐liquid equilibria of seven fatty acids (C 12 ‐C 18 ) + water systems were achieved based only on the k ij correlation obtained from liquid–liquid equilibria data. © 2009 American Institute of Chemical Engineers AIChE J, 2009