Description of the Mutual Solubilities of Fatty Acids and Water With the CPA EoS

abstract

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 ride 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. (C) 2009 American Institute of Chemical Engineers AIChE J, 55: 1604-1613, 2009

keywords

EQUATION-OF-STATE; PLUS LIQUID EQUILIBRIA; BIODIESEL PRODUCTION; ASSOCIATING MOLECULES; TERNARY-SYSTEMS; DIBASIC ESTERS; IONIC LIQUIDS; PROCESS MODEL; MIXTURES; PREDICTION

subject category

Engineering

authors

Oliveira, MB; Pratas, MJ; Marrucho, IM; Queimada, AJ; Coutinho, JAP

our authors

acknowledgements

Financial support was provided by the national project POCI/EQU/58239/2004:

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".