Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds: Saturated fatty acids

Author(s)

Belting, Patricia C. ^{[1, 2]} ; Rarey, Juergen ^[2] ; Gmehling, Juergen ^[2] ; Ceriani, Roberta ^[3] ; Chiavone-Filho, Osvaldo ^[4] ; Meirelles, Antonio J. A. ^[1]

Affiliation

^[1] Univ Estadual Campinas, Fac Food Engn, Dept Food Engn, BR-13083970 Campinas, SP - Brazil

^[2] Carl von Ossietzky Univ Oldenburg, Tech Chem FK V, D-26111 Oldenburg - Germany

^[3] Univ Estadual Campinas, Fac Chem Engn, BR-13083852 Campinas, SP - Brazil

^[4] Univ Fed Rio Grande do Norte, Dept Chem Engn, BR-59066800 Natal, RN - Brazil

• Document type: Journal article
• Source: JOURNAL OF CHEMICAL THERMODYNAMICS; v. 55, p. 42-49, DEC 2012.
• Web of Science Citations: 6

Abstract

The activity coefficients at infinite dilution, gamma(infinity)(13) (the subscript 1 and 3 correspond to solute and solvent, respectively), for 21 solutes, including alkane, cycloalkane, alkene, aromatic compounds, alcohol, ester, ketone, and halogenated hydrocarbons, in four solvents, that are the saturated fatty acids: capric (decanoic) acid, lauric (dodecanoic) acid, myristic (tetradecanoic) acid, and palmitic (hexadecanoic) acid, were determined by gas-liquid chromatography at temperatures from 314.10 K to 358.33 K. Comparison with previously published for selected solutes in palmitic (hexadecanoic) acid were also performed. The values of the partial molar excess Gibbs free energy, Delta G(13)(infinity), enthalpy, Delta H-13(infinity), and entropy, Delta S-13(infinity), at infinite dilution were calculated from experimental gamma(infinity)(13) values obtained over the temperature range. Results obtained in this work allow a more accurate description of the real behavior of fatty systems. (C) 2012 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 10/16634-0 - Separation processes by stripping in the fat and oil industry
• Grantee: Roberta Ceriani
• Support Opportunities: Regular Research Grants
• FAPESP's process: 09/54137-1 - Acquisition of a particle size/distribution analyzer, a zeta potential measurement system, a spray dryer, and an ultra-high-pressure liquid chromatograph/mass spectrometer
• Grantee: Miriam Dupas Hubinger
• Support Opportunities: Multi-user Equipment Program