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Item type:Publication, Access status: with files , Extraction of oil, carotenes and tocochromanols from oil palm (Elaeis guineensis) fruit with subcritical propane(2023-03-24); This work aims to screen the extraction of oil and bioactive compounds including carotenes and tocochromanols from oil palm fruit with subcritical propane and without using a cosolvent. The overall extraction curves of palm oil with subcritical propane were studied and compared to those extracted with supercritical carbon dioxide. Carotenes and tocochromanols were evaluated not only in the extracted oil. but also in the oil of residual fiber in order to calculate the efficiency to recover these valuable compounds. The experimental results showed that oil yield of up to 70 % could be obtained within 120 minutes with subcritical propane at 50 bar and a flow rate of 35 kg·h-1·kg-1-. It was also shown that compressed propane is an excellent solvent for the extraction of oil enriched in carotenes and tocochromanols. Subcritical propane extraction can be used as an alternative process for the simultaneous recovery of these valuable minor components from palm fruit.Publicationtype: Journal ArticleScopus© Citations 2 58 62 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Extraction of oil and minor compounds from oil palm fruit with supercritical carbon dioxideA significant quantity of tocochromanols and carotenoids remains in the residual from palm oil production by traditional screw pressing. Supercritical carbon dioxide extraction was used as alternative method with the purpose to recover better these valuable minor compounds. Total oil yield and co-extracted water were investigated in the course of extraction. Tocochromanols and carotenoids were evaluated, not only in the extraction oil, but also in the oil of residual fibre. Modelling of extraction process was also performed for a further up-scaling. The results showed that oil yield up to 90% could be observed within 120 min. Supercritical carbon dioxide (SCCO2) could extract tocochromanols and carotenoids with concentration in the same range of normal commercial processing palm oil, while co-extracted water remained rather low at a level of 2–4%. Moreover, recovery efficiencies of these minor compounds were much higher in case of extraction processed with supercritical carbon dioxide than those with screw pressing method.Publicationtype: Journal ArticleScopus© Citations 14 293 342 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Mono- and di-acylglycerol synthesis in CO2-expanded acetoneEnzymatic esterification of glycerol and palmitic acid was performed in acetone expanded by CO2 at 40-60 °C and 65-85 bar. Novozyme 435, Lipozyme RM IM, Lipozyme TL IM and Lipomod 34P were screened to select a suitable enzyme for the study. The effects of additional water and molar ratio of glycerol to palmitic acid on the selectivity to mono- and di-acylglycerol were investigated. Response surface method was used to describe the dependency of pressure, temperature, and enzyme concentration on the conversion of palmitic acid. Optimum condition was finally selected at 85 bar, 50 °C and 25% of Novozyme 435 related to the amount of dissolved fatty acid.Publicationtype: Journal Article22