Coelho, JoseFilipe, RuiRobalo, Maria PaulaStateva, Roumiana P.2019-01-182019-01-182018-11COELHO, 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. 68-770896-84461872-8162http://hdl.handle.net/10400.21/9352Supercritical 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.engGrape (Vitis vinifera L.) seed oilSupercritical CO2 extractionTriacylglycerolsFatty acidsMathematical modelingjournal article10.1016/j.supflu.2017.12.008