Journal of Supercritical Fluids
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 scCO2 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 scCO2 extraction methods, but the latter have higher PUFA 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. © 2017 Elsevier B.V.
Year of publication: 2018