Assessment of biomass and lipid productivity and biodiesel quality of an indigenous microalgaChlorella sorokinianaMIC-G5
- 20 December 2017
- journal article
- research article
- Published by Taylor & Francis Ltd in International Journal of Green Energy
- Vol. 15 (1), 45-52
- https://doi.org/10.1080/15435075.2017.1351368
Abstract
Generation of biodiesel from microalgae has been extensively investigated; however, its quality is often not suitable for use as fuel. Our investigation involved the evaluation of biodiesel quality using a native isolate Chlorella sorokiniana MIC-G5, as specified by American Society for Testing and Materials (ASTM), after transesterification of lipids with methanol, in the presence of sodium methoxide. Total quantity of lipids extracted from dry biomass, of approximately 410–450 mg g−1 was characterized using FTIR and 1H NMR. After transesterification, the total saturated and unsaturated fatty acid methyl esters (FAMEs) were 43% and 57%, respectively. The major FAMEs present in the biodiesel were methyl palmitate (C16:0), methyl oleate (C18:1), and methyl linoleate (C18:2), and the 1H NMR spectra matched with criteria prescribed for high-quality biodiesel. The biodiesel exhibited a density of 0.873 g cm–3, viscosity of 3.418 mm2 s−1, cetane number (CN) of 57.85, high heating value (HHV) of 40.25, iodine value of 71.823 g I2 100 g−1, degree of unsaturation (DU) of 58%, and a cold filter plugging point (CFPP) of –5.22°C. Critical fuel parameters, including oxidation stability, CN, HHV, iodine value, flash point, cloud point, pour point, density, and viscosity were in accordance with the methyl ester composition and structural configuration. Hence, C. sorokiniana can be a promising feedstock for biodiesel generation.Keywords
Funding Information
- Director, ICAR Indian Agricultural Research Institute, New Delhi, India for providing necessary facilities under the Challenge Program on Biofuels of the Institute
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