Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption.

0467132 - ÚCHP 2017 RIV CH eng J - Článek v odborném periodiku
Sovová, Helena - Nobre, B.P. - Palavra, A.
Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption.
Materials. Roč. 9, č. 6 (2016), s. 423-441. E-ISSN 1996-1944
Grant ostatní: FCT(PT) UID/QUI/00100/2013; FCT(PT) SFRH/BPD/100283/2014
Institucionální podpora: RVO:67985858
Klíčová slova: microalgae * supercritical extraction * kinetics
Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství
Impakt faktor: 2.654, rok: 2016

Microalgae contain valuable biologically active lipophilic substances such as omega-3 fatty acids and carotenoids. In contrast to the recovery of vegetable oils from seeds, where the extraction with supercritical CO2 is used as a mild and selective method, economically viable application of this method on similarly soluble oils from microalgae requires, in most cases, much higher pressure. This paper presents and verifies hypothesis that this difference is caused by high adsorption capacity of microalgae. Under the pressures usually applied in supercritical fluid extraction from plants, microalgae bind a large fraction of the extracted oil, while under extremely high CO2 pressures their adsorption capacity diminishes and the extraction rate depends on oil solubility in supercritical CO2. A mathematical model for the extraction from microalgae was derived and applied to literature data on the extraction kinetics in order to determine model parameters.
Trvalý link: http://hdl.handle.net/11104/0265259