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dc.contributor.authorRattana Muangraten_US
dc.contributor.authorIsrapong Pongsirikulen_US
dc.description.abstract© 2019, © 2019 The Author(s). Published with license by Taylor & Francis Group, LLC. Soxhlet and accelerated solvent extraction, using propanol as a solvent, and supercritical CO2 extraction methods presented statistically insignificant differences in the crude oil yield obtained from spent coffee grounds. Supercritical CO2 extraction method was selected to recover the oil. The optimal extraction condition for a high crude oil yield, low acid value, percentage of free fatty acids, peroxide value and thiobarbituric acid reactive substances (TBARS) value, and high iodine and saponification values, was obtained simultaneously at 50°C, 200 bar and 2 h. Under this condition, the experimental data obtained, namely 12.14% oil yield, acid value 3.89 mg KOH/g oil, 2.11% free fatty acids, iodine value 90.70 g I2/g oil, saponification value 212.05 mg KOH/g oil, peroxide value 3.77 mEqO2/kg oil and TBARS value 0.76 mg malondialdehyde/kg oil, were reasonably close to the predicted values. Additionally, the oil from spent coffee grounds is a precious source of palmitic and linoleic acids.en_US
dc.subjectAgricultural and Biological Sciencesen_US
dc.subjectChemical Engineeringen_US
dc.titleRecovery of spent coffee grounds oil using supercritical CO<inf>2</inf>: extraction optimization and physicochemical properties of oilen_US
article.title.sourcetitleCYTA - Journal of Fooden_US
article.volume17en_US Mai Universityen_US
Appears in Collections:CMUL: Journal Articles

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