Biodiesel production from microalga Dunaliella salina oil via transesterification

Azhari Muhammad Syam, . and Selvy Handayani, . and Rachmawati Rusydi, . and Rizka Mulyawan, . and Sausan Munira, . and Efri Marnelisa, . (2022) Biodiesel production from microalga Dunaliella salina oil via transesterification. International Journal of Agriculture, Forestry and Plantation (Malaysia), 12. pp. 76-82. ISSN 2462-1757

This study examined the transesterification (methanolysis) of Dunaliella salina oil, the kinetics of transesterification, and the characteristics of biodiesel. Because the oils had high levels of contaminants, including free fatty acids, a specific pre-treatment was conducted. Alkali-catalysed methanolysis was investigated concerning a few variables, including the molar ratio, catalyst concentration, rotational speed, and reaction time. According to the data, the best conditions for methanolysis were a 6.0 molar ratio, 1.2 percent weight-for-weight catalyst, 90 minutes of reaction time, and 400 rpm, with the greatest yield being 98.75 percent. The kinetics investigation revealed that the activation energy and reaction rate constant for the first-order reaction mechanism was 1.82×10-2 min-1 and 21.53 kjmol-1, respectively. The physicochemical characteristics of biodiesel as a fuel met the minimum standards specified by ASTM D6751.

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Abstract

This study examined the transesterification (methanolysis) of Dunaliella salina oil, the kinetics of transesterification, and the characteristics of biodiesel. Because the oils had high levels of contaminants, including free fatty acids, a specific pre-treatment was conducted. Alkali-catalysed methanolysis was investigated concerning a few variables, including the molar ratio, catalyst concentration, rotational speed, and reaction time. According to the data, the best conditions for methanolysis were a 6.0 molar ratio, 1.2 percent weight-for-weight catalyst, 90 minutes of reaction time, and 400 rpm, with the greatest yield being 98.75 percent. The kinetics investigation revealed that the activation energy and reaction rate constant for the first-order reaction mechanism was 1.82×10-2 min-1 and 21.53 kjmol-1, respectively. The physicochemical characteristics of biodiesel as a fuel met the minimum standards specified by ASTM D6751.

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Item Type:	Article
AGROVOC Term:	microalgae
AGROVOC Term:	biodiesel
AGROVOC Term:	transesterification
AGROVOC Term:	fish oil extraction
AGROVOC Term:	Dunaliella salina
AGROVOC Term:	catalysts
AGROVOC Term:	methanol
AGROVOC Term:	free fatty acids
AGROVOC Term:	yields
AGROVOC Term:	kinetics
Geographical Term:	Indonesia
Depositing User:	Mr. Khoirul Asrimi Md Nor
Date Deposited:	20 May 2026 06:23
Last Modified:	20 May 2026 06:23
URI:	http://webagris.upm.edu.my/id/eprint/3905

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