Obtaining biodiesel from microalgae oil using ultrasound-assisted in-situ alkaline transesterification

Dublin Core

Title

Obtaining biodiesel from microalgae oil using ultrasound-assisted in-situ alkaline transesterification

Subject

MICROALGAS
ESPIRULINA
BIODIESEL
BIBLIOGRAFIA NACIONAL QUIMICA
2017

Abstract

Efficiency of in-situ alkaline transesterification of dry biomass from a crop of Spirulina sp., using ultrasound-assisted and/or the addition of different co-solvents to the reaction medium was studied. The starting biomass had a total lipid content of 7.0% (Folch method), comprised mainly by the following fatty acids: 16:0 (44.2%), 18:3 (n–6) (23.3%), and 18: 2 (n–6) (11.1%). When the transesterification reaction was carried out without ultrasound, it only extracted 12.8% of lipids (0.9% of the biomass) after 2 h of reaction, achieving only a 63.6% ester content. When the process was carried out under the same conditions except for the ultrasound-assisted (80 W), the weight yield remained mostly unchanged, but the ester content increased to 97.6%. Additionally, when chloroform was added to methanol as a co-solvent in a 2:1 ratio it was possible to extract 43% of lipids. However, the ester content was reduced to 69.7%. Moreover, with maximum ultrasound power (180 W) a high ester content (96.9%) and a relatively high extraction yield (26%) were obtained, even without the co-solvent. These results show that the ultrasound significant increased the yield of the in-situ alkaline transesterification of Spirulina sp. biomass, promoting a higher percent recovery of lipids as well as ester content from the starting material.

Creator

Martínez, Natalia
Callejas, Nicolás
Morais, Etiele G.
Vieira Costa, Jorge A.

Source

Fuel v. 202, 2017. -- p. 512-519

Publisher

Elsevier

Date

2017

Rights

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Format

PDF

Language

Inglés

Type

Artículo

Identifier

DOI: 10.1016/j.fuel.2017.04.040

Document Item Type Metadata

Original Format

PDF
Date Added
November 21, 2017
Collection
Bibliografía Nacional Química
Item Type
Document
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Citation
Martínez, Natalia et al., “Obtaining biodiesel from microalgae oil using ultrasound-assisted in-situ alkaline transesterification,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed November 17, 2025, https://riquim.fq.edu.uy/items/show/4767.