The Hansen theory to choose the best cosolvent for supercritical CO2 extraction of β-carotene from Dunaliella salina

Tirado Armesto, Diego Felipe; Calvo Garrido, María Lourdes

The Hansen theory to choose the best cosolvent for supercritical CO2 extraction of β-carotene from Dunaliella salina

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Official URL

https://doi.org/10.1016/j.supflu.2018.12.013

Publication date

2019

Authors

Tirado Armesto, Diego Felipe

Calvo Garrido, María Lourdes

Publisher

Elsevier

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URI

https://hdl.handle.net/20.500.14352/12898

Citation

Tirado, Diego F., y Lourdes Calvo. «The Hansen Theory to Choose the Best Cosolvent for Supercritical CO2 Extraction of β-Carotene from Dunaliella Salina». The Journal of Supercritical Fluids, vol. 145, marzo de 2019, pp. 211-18. DOI.org (Crossref), https://doi.org/10.1016/j.supflu.2018.12.013.

Abstract

The Hansen solubility theory was used to predict the best cosolvent for supercritical carbon dioxide (sc-CO2) to achieve the selective extraction of β-carotene from Dunaliella salina. Among four organic cosolvents, ethanol was predicted to be the best based on minima Ra values. The predictions were validated through equilibrium data and extraction curves from the microalgae. The addition of ethanol reduced the bubble pressures, and therefore increased the solubility of the β-carotene. With 5% mass fraction, at 318.15 K and 20 MPa, the extraction yield was 25 g carotenoids kg microalgae−1, much more than in pure sc-CO2 (6 g).