Extraction and solubility studies of virgin coconut oil from coconut (Cocos nucifera) flesh using supercritical carbon dioxide

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dc.contributor.authorSetianto, Wahyu Bahari
dc.date.accessioned2018-08-15T06:47:55Z
dc.date.available2018-08-15T06:47:55Z
dc.date.issued2011-01
dc.description.abstractCoconut (Cocos nucifera) oil which is extracted from fresh coconut flesh is known as virgin coconut oil (VCO). The oil is a natural source of medium chain tryglycerides (MCTs) which has been well known as healthy oil. It is remarkable that very few reports on the extraction of the VCO using SC-CO2 have been published hitherto the fundamental insights on the SC-CO2 extraction processes of the coconut oil are much lacking. The objectives of this work are evaluating the parameters effects of VCO extraction using SC-CO2 and examination of the oil solubility in SCCO2. The assessment of interaction effects of extraction parameters was performed using a Response surface methodology (RSM). The study was carried out according to Box-Behnken design. Pressure (20.7 – 34.5 MPa), temperature (313 – 353 K) and CO2 consumption (10 – 60 g) were chosen as the parameters. The responses were the extraction yield and the MCTs content of extracted oil. The yield was calculated by gravimetric and the MCTs content analysis was performed using GC analysis. A correlation was established with p -value for both responses at 95% confident level. The Solubility measurement was performed by dynamic method at the pressures and temperatures range of 20.7 to 34.5 MPa and 313 to 353 K respectively. Oil solubility analysis was performed using gravimetric and curve xix analysis. The oil solubility increases with temperature at pressures between 31.0 and 34.5 MPa and decreases with temperature at pressures between 20.7 and 24.1 MPa. The solubility experimental data obtained was correlated with Chrastil and del Valle- Aguilera model, which are based on the CO2 density. A solubility cross-over region was observed in the pressure range of 27.5 to 30.5 MPa and at around 29 MPa, the solubility of VCO in SC-CO2 is practically independent of temperature. The validity of the solubility data was performed by its comparison with previous reported data of pure triglyceride solubility in SC-CO2 and performing a self-consistency test with the method of Méndez-Santiago and Teja.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/6322
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectCoconut oilen_US
dc.subjectcookingen_US
dc.titleExtraction and solubility studies of virgin coconut oil from coconut (Cocos nucifera) flesh using supercritical carbon dioxideen_US
dc.typeThesisen_US
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