| Naslov: | Two-step extraction of pumpkin seed oil with supercritical CO2 and subcritical propane: the yield, kinetics and profile of fatty acids : the yield, kinetics and profile of fatty acids |
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| Avtorji: | ID Cör Andrejč, Darija (Avtor)
ID Knez, Željko (Avtor)
ID Kotnik, Petra (Avtor)
ID Knez Marevci, Maša (Avtor) |
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| Datoteke: |  1-s2.0-S0896844626002214-main.pdf (6,90 MB)
MD5: C104CBB16317CA2690CF765E82A9FA80
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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Članek v reviji |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | FKKT - Fakulteta za kemijo in kemijsko tehnologijo
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| Opis: | Pumpkin seed oil is oil rich in oleic, linoleic, and palmitic acids fatty. In our study, a two-stage extraction method has been used to encourage a higher yield and the quality of the oil. The first step was carried out with supercritical carbon dioxide (scCO₂) in the pressure range from 200 bar to 800 bar and temperatures of 40 °C and 60 °C. For the second step subcritical propane was used, at a pressure of 50 bar and 100 bar, and the same temperatures that were used previously for the first step of scCO2 extraction. The extraction kinetics were modelled using Brunner’s semi-empirical approach, which showed good agreement with the experimental data (R² > 0.97), confirming its suitability for both solvents. The combination of both extraction steps increased the overall yield, with the highest value of 45.3% obtained within the investigated pressure range (200–800 bar) at conditions of 600 bar and 60 °C (scCO₂) and 100 bar and 60 °C (propane). An analysis of the fatty acids (FA) by gas chromatography (GC) showed a stable fatty acid profile dominated by oleic acid (up to 48.56%), followed by linoleic acid. The second extraction step with propane enabled recovery of the residual oil remaining in the matrix successfully after the scCO₂ extraction. The presented integrated approach demonstrates that sequential application of environmentally friendly solvents can increase the overall recovery of pumpkin seed oil while providing solvent-free extracts with a high content of unsaturated fatty acids. |
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| Ključne besede: | supercritical CO2 extraction, proprane extraction, Brunner model, fatty acid, chromatography |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Poslano v recenzijo: | 27.03.2026 |
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| Datum sprejetja članka: | 29.07.2026 |
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| Datum objave: | 07.08.2026 |
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| Založnik: | Elsevier B.V. |
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| Leto izida: | 2027 |
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| Št. strani: | 12 str. |
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| Številčenje: | Vol. 239, [article no.] 107105 |
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| PID: | 20.500.12556/DKUM-100117  |
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| UDK: | 66.02 |
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| COBISS.SI-ID: | 288999939 |
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| DOI: | 10.1016/j.supflu.2026.107105 |
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| ISSN pri članku: | 1872-8162 |
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| Avtorske pravice: | © 2026 The Authors |
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| Datum objave v DKUM: | 04.09.2026 |
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| Število ogledov: | 242 |
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| Število prenosov: | 7 |
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| Metapodatki: |    |
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| Področja: | Ostalo
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