Phase behaviour and mathematical modelling for the system annatto seed oil in compressed carbon dioxide plus ethanol as co-solvent

Author(s)

Vardanega, Renata ^[1] ; Dalmolin, Irede A. ^[2] ; Nogueira, Gislaine C. ^[1] ; Hatami, Tahmasb ^[1] ; Meireles, M. Angela A. ^[1]

Affiliation

^[1] Univ Estadual Campinas, Sch Food Engn, LASEFI DEA FEA, UNICAMP, R Monteiro Lobato 80, BR-13083862 Campinas, SP - Brazil

^[2] UTFPR Fed Technol Univ Parana, DAENQ Dept Chem Engn, Linha Santa Barbara S-N, BR-85601970 Francisco Beltrao, Para - Brazil

• Document type: Journal article
• Source: JOURNAL OF SUPERCRITICAL FLUIDS; v. 130, p. 56-62, DEC 2017.
• Web of Science Citations: 3

Abstract

This work reports phase equilibrium experimental data (cloud points) for the system annatto seed oil in compressed carbon dioxide + ethanol as co-solvent. The oil was obtained by supercritical fluid extraction at 40 degrees C and 20 MPa using carbon dioxide as solvent. The synthetic static method was employed for the measurements, which were carried out in a temperature range from 25 to 60 degrees C and up to 19.32 MPa. The experiments were carried out using (CO2 + ethanol) overall mass fraction compositions ranging from 0.82 to 0.99. Experimental results were modelled using artificial neural network (ANN). Results indicate a complex phase behavior for all temperatures investigated with the occurrence of vapor-liquid, liquid-liquid and vapor-liquid-liquid transitions. ANN modelling was an efficient alternative for the thermodynamic models to accurately analysis of the phase equilibrium at high pressure. (AU)

• FAPESP's process: 15/13299-0 - From seeds to final products: feasible manufacturing routes of annatto applying process intensification and process integration
• Grantee: Maria Angela de Almeida Meireles Petenate
• Support Opportunities: Regular Research Grants