| Title: | 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 |
|---|
| Authors: | ID Cör Andrejč, Darija (Author)
ID Knez, Željko (Author)
ID Kotnik, Petra (Author)
ID Knez Marevci, Maša (Author) |
|---|
| Files: |  1-s2.0-S0896844626002214-main.pdf (6,90 MB)
MD5: C104CBB16317CA2690CF765E82A9FA80
|
|---|
| Language: | English |
|---|
| Work type: | Article |
|---|
| Typology: | 1.01 - Original Scientific Article |
|---|
| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
|
|---|
| Abstract: | 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. |
|---|
| Keywords: | supercritical CO2 extraction, proprane extraction, Brunner model, fatty acid, chromatography |
|---|
| Publication status: | Published |
|---|
| Publication version: | Version of Record |
|---|
| Submitted for review: | 27.03.2026 |
|---|
| Article acceptance date: | 29.07.2026 |
|---|
| Publication date: | 07.08.2026 |
|---|
| Publisher: | Elsevier B.V. |
|---|
| Year of publishing: | 2027 |
|---|
| Number of pages: | 12 str. |
|---|
| Numbering: | Vol. 239, [article no.] 107105 |
|---|
| PID: | 20.500.12556/DKUM-100117  |
|---|
| UDC: | 66.02 |
|---|
| ISSN on article: | 1872-8162 |
|---|
| COBISS.SI-ID: | 288999939 |
|---|
| DOI: | 10.1016/j.supflu.2026.107105 |
|---|
| Copyright: | © 2026 The Authors |
|---|
| Publication date in DKUM: | 04.09.2026 |
|---|
| Views: | 241 |
|---|
| Downloads: | 7 |
|---|
| Metadata: |    |
|---|
| Categories: | Misc.
|
|---|
|
:
|
Copy citation |
|---|
| | | | Average score: | (0 votes) |
|---|
| Your score: | Voting is allowed only for logged in users. |
|---|
| Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
