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Izpis gradiva

Naslov:Kinetics of supercritical carbon dioxide extraction of borage and evening primrose seed oil
Avtorji:Kotnik, Petra (Avtor)
Škerget, Mojca (Avtor)
Knez, Željko (Avtor)
Datoteke:URL http://dx.doi.org/10.1002/ejlt.200600070
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano ()
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Opis:In the present work, high-pressure extraction of borage (Borago officinalis L.) and evening primrose (Oenothera biennis L.) seed oil, containing the valuable -linolenic acid (GLA), has been investigated. Extraction was performed with supercritical carbon dioxide on a semi-continuous flow apparatus at pressures of 200 and 300 bar, and at temperatures of 40 and 60 °C. A constant flow rate of carbon dioxide in the range from 0.17 to 0.20 kgžhwas maintained during extraction. The extraction yields obtained using dense CO2 were similar to those obtained with conventional extraction using hexane as solvent. The composition of extracted crude oil was determined by GCanalysis. The best results were obtained at 300 bar and 40 °C for both seed types extracted, where the quality of oil was highest with regard to GLA content. The evening primrose seed oil extracted with supercritical fluid extraction was particularly rich in unsaturated fatty acidsČ up to 89.7 wt-% of total free fatty acids in the oil. The dynamic behavior of the extraction runs was analyzed using two mathematical models for describing the constant rate period and the subsequent falling rate period. Based on the experimental data, external mass transfer coefficients, diffusion coefficients and diffusivity in solid phase were estimated. Results showed good agreement between calculated and experimental data.
Ključne besede:chemical processing, high pressure technology, supecritical CO2, seed oil extraction, evening primrose, borage, free fatty acids, kinetics, modeling
Leto izida:2006
UDK:66.061-987
URN:URN:SI:UM:DK:7BHKPKVK
COBISS_ID:10617878 Povezava se odpre v novem oknu
ISSN pri članku:1438-7697
Število ogledov:1092
Število prenosov:30
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Ostalo
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Gradivo je del revije

Naslov:European journal of lipid science and technology
Skrajšan naslov:Eur. j. lipid sci. technol.
Založnik:Wiley-VCH
ISSN:1438-7697
COBISS.SI-ID:22020101 Novo okno

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:visokotlačna tehnologija, superkritični CO2, ekstrakcija olja semen, svetlin, boreč, proste maščobne kisline, kinetika, modeliranje


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