Vicência de Fátima Cristóvão da Costa, Teresa Saleme Tingeira, Etiandra dos Santos and António André Chivanga Barros*

Department of Engineering and Technology (DET), Instituto Superior Politécnico de Tecnologias e Ciências (ISPTEC), Avenida Luanda Sul, Talatona, Luanda, Angola

*Corresponding Author: António André Chivanga Barros, Department of Engineering and Technology (DET), Instituto Superior Politécnico de Tecnologias e Ciências (ISPTEC), Avenida Luanda Sul, Talatona, Luanda, Angola.

Received: August 11, 2023; Published: December 11, 2023

Abstract

Essential oils contains the essence of the plant's fragrance, characteristic of which it is derived. To developed of this study, the extraction was carried out in a laboratory scale unit, for temperature and pressure previously defined, having as solvent the carbon dioxide and ethanol mixture. The onion sample used as raw material was previously chopped and dried and the essential oil was extracted. The essential oil produced was purified and the yield determined by the relation between weigh of essential oil produced and initial onion mass inside the extractor tank. In all cases, the proportion of CO2 flowrate used in the mixture, have impacts on the essential oil recovery and the products obtained were characterized in term of density, acid index and refraction index. With the result from this research, we can conclude that the best performance of extraction of essential oil was obtained with high flowrate of CO2 in the mixture, that result in high extraction yield.

Keywords: Essential Oil; Supercritical Solvents; Conventional Solvents; CO2; Extraction Processes

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Citation

Citation: António André Chivanga Barros., et al. “Extraction of Essential Oil from Onion (Allium cepa) using Hybrid Fluid Mixture (Ethanol and CO2) as Solvent".Acta Scientific Nutritional Health 8.1 (2024): 21-27.

Copyright

Copyright: © 2024 António André Chivanga Barros., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.