Transesterification of Nannochloropsis oculata microalga's oil to biodiesel using calcium methoxide catalyst

Teo, Siow Hwa and Islam, Aminul and Yusaf, Talal and Taufiq-Yap, Yun Hin (2014) Transesterification of Nannochloropsis oculata microalga's oil to biodiesel using calcium methoxide catalyst. Energy, 78. pp. 63-71. ISSN 0360-5442


Biodiesel is an environmental friendly liquid fuel similar to conventional diesel in combustion properties. It has received international attention in recent times, as that biodiesel is renewable, non-toxic and safe to store. In this study, high grade biodiesel was produced from microalgae (Nannochloropsis oculata) derived lipids via transesterification reaction with methanol in the presence of heterogeneous Ca(OCH3)2 (calcium methoxide) catalyst. The biodiesel was produced with high yield; (92%) at 60°C compared to the highest yield reported as 22% with the use of a Mg-Zr catalyst. The product exhibited excellent performances. The catalyst was characterized by TG/DTA (thermogravimetric-differential thermal analyses), XRD (X-ray diffraction), BET (Brunauer - Emmett - Teller), FTIR (Fourier transform infrared), SEM-EDX (scanning electron microscopy-energy dispersive spectrometer) and TEM (transmission electron microscopy) analysis. The effect of different reaction parameters including reaction time, methanol/oil molar ratio and catalyst dosage on the yield of FAME (fatty acid methyl ester) was studied. Interestingly, the catalyst can be reused five times successively without affecting the biodiesel yield. Biodiesel produced from microalgae oil consists of high levels of polyunsaturated fatty acids, making it highly suitable as winter grade biodiesel.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 27 Apr 2017 01:40
Last Modified: 28 Apr 2017 02:22
Uncontrolled Keywords: biodiesel; transesterification; heterogenous catalyst; calcium methoxide; Nannochloropsis oculata
Fields of Research : 09 Engineering > 0902 Automotive Engineering > 090201 Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
Identification Number or DOI: 10.1016/

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