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Advisor(s)
Abstract(s)
Supercritical extraction of oil from grape seed samples obtained from a Portuguese industry was carried out at temperatures from (313-333) K, pressures up to 40.0 MPa and different scCO(2) flow rates.
The qualitative analysis of the crude oil was carried out by NMR. The fatty acids were analyzed by GC-Fid with reference to the parameters in Annex I to European Commission Regulation.
The results show similar content of TAGs and DAGs both in the n-hexane and scCO(2) extraction methods, but the latter have higher PUPA and lower saturated fatty acids content.
A dynamic model was used to simulate the extraction curves in gPROMS ModelBuilder. The grape seed oil was represented as either a one or a three component mixture of triacylglycerols, and the deviation between the experimental and calculated extraction yields was in the range (2-9) % for the first, and (4-11) % for the second case.
Description
Keywords
Grape (Vitis vinifera L.) seed oil Supercritical CO2 extraction Triacylglycerols Fatty acids Mathematical modeling
Citation
COELHO, José Augusto Paixão; [et al] – Recovering value from organic waste materials: Supercritical fluid extraction of oil from industrial grape seeds. Journal of Supercritical Fluids. ISSN 0896-8446. Vol. 141 SI (2018), pp. 68-77
Publisher
Elsevier