Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Comparison of lipid extraction using pure hexane and a mixture of hexane and ethanol as extraction solvents for microalgae
Submission Author:
Heloísa da Silva , PR
Co-Authors:
Heloísa da Silva, Wellington Balmant, JOSÉ VIRIATO COELHO VARGAS
Presenter: Heloísa da Silva
doi://10.26678/ABCM.COBEM2021.COB2021-0302
Abstract
Due to the global need for cleaner and more renewable energy, the search for new sources is growing; among them are microalgae, single-celled microorganisms that have a high content of lipids and carbohydrates in the constitution of their biomass. These components can be used as raw material in biofuel production processes, thus the biodiesel is the most common currently used. The biodiesel is obtained through a transesterification process, a reaction that requires oil as a reagent, in addition to alcohol and a catalyst. As a result, the lipid content extraction of the microalgae is shown to be a decisive step for the analysis of the process viability. It depends on several factors to be analyzed, in the midst of them: the chosen method, extraction yield, the time required and the size of the sample to be extracted. Several techniques have been used for the oil extraction such as extraction with a supercritical fluid, osmotic shock and solvent extraction. Despite those different methodologies, the solvent extraction using the hot method is one of the most used industrialy, due to its simplicity and relative low costs of solvents. In face of above, the present study discusses an experimental method developed for the extraction of oil from microalgae using solvent in a hot process with agitation. It was evaluated two different solvents, one using pure hexane and other with a mixture of organic solvents (70%, hexane and 30% ethanol). The experimental results obtained proving the better extraction yield for the solvent mixture than that verified for the pure solvent. It showed that there is a difference in behavior of the separate components, in its pure form, showing a synergy with the extraction in mixture.
Keywords
Lipid Extraction, microalgae, extraction solvents
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