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Optimisation and modelling of supercritical CO2 extraction process of carotenoids from carrot peels

de Andrade Lima, M., Charalampopoulos, D. ORCID: and Chatzifragkou, A. ORCID: (2018) Optimisation and modelling of supercritical CO2 extraction process of carotenoids from carrot peels. The Journal of Supercritical Fluids, 133. pp. 94-102. ISSN 0896-8446

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To link to this item DOI: 10.1016/j.supflu.2017.09.028


This work aimed to assess and optimise the extraction of carotenoids from carrot peels by supercritical CO2 (S-CO2), utilising ethanol as co-solvent. The evaluated variables were temperature, pressure and co-solvent concentration. According to the validated model, the optimal conditions for maximum mass yield (5.31%, d.b.) were found at 58.5 °C, 306 bar and 14.3% of ethanol, and at 59.0 °C, 349 bar and 15.5% ethanol for carotenoid recovery (86.1%). Kinetic experiments showed that 97% of the total extractable carotenoid content was recovered after only 30 min, whereas model fitting confirmed the fast extraction trend and desorbing nature of carotenoids from the sample matrix. The process is potentially scalable, as demonstrated by runs performed with a 10-fold initial sample size, which led to even higher recoveries (96.2%), indicating that S-CO2 can be as efficient as a conventional solvent extraction for recovering high value compounds from vegetable by-products.

Item Type:Article
Divisions:Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences > Food Research Group
ID Code:73058


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