Intensification of Mass Transfer in the Extraction Process with a Nanofluid Prepared in a Natural Deep Eutectic Solvent |
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Authors: | Anamarija Mitar Jasna Prlić Kardum |
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Affiliation: | University of Zagreb, Faculty of Chemical Engineering and Technology, Department of Mechanical and Thermal Process Engineering, Marulićev trg 19, 10 000 Zagreb, Croatia |
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Abstract: | The phytotoxic residues after olive oil production and residue leaves after pruning contain valuable bioactive compounds. A natural deep eutectic solvent (NADES) and an ethanol-water mixture were used for polyphenol extraction from olive pomace and leaves. Type of solvent, extraction temperature, and particle size of the leaves were optimized. NADES demonstrated better efficiency in the extraction process than conventional solvents; with higher temperature and smaller fraction of olive leaves, a higher yield of polyphenols was obtained from leaves. Extraction with a nanofluid as solvent was carried out. A stable nanofluid was prepared from NADES by adding Al2O3 nanoparticles. A higher yield was obtained with nanofluid from leaves, while an improvement of polyphenol extraction was achieved after the removal of oil from olive pomace. |
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Keywords: | Extraction Mass transfer Nanofluids Natural deep eutectic solvents Polyphenols |
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