COMPARATIVE CHARACTERIZATION OF BIODIESELS PRODUCED BY TRANSESTERIFICATION FROM Jatrpha curcas AND Thevetia nerifolia SEEDS
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COMPARATIVE CHARACTERIZATION OF BIODIESELS PRODUCED BY TRANSESTERIFICATION FROM Jatrpha curcas AND Thevetia nerifolia SEEDS
ABSTRACT
The increasing scarcity of fossil resources, rising demand for petroleum fuels, and the growing negative consequences of producing and using fossil fuels all point to alternatives. Biodiesel is a renewable, environmentally beneficial, socially acceptable, technologically practical, and financially viable replacement fuel for diesel engines.
This study compares the characterisation of biodiesels produced by transesterification from Jatrpha curcas and Thevetia nerifolia seed oil utilising 1:5, 1:6, and 1:7 methanol and oil with base catalyst (NaOH) at 60oC.
The methyl ester biodiesels’ physicochemical parameters (PH, specific gravity, viscosity, and flash point) were determined. The biodiesel qualities obtained were compared to the American (ASTM) and European (EN) biodiesel standards. The data were analysed using the Randomised Complete Block Design (RCBD).
This study found that the reaction ratio 1:5 produced the maximum biodiesel yield of 91%, 82%, and 70% from Jatropha, Thevetia, and the mixture, respectively. The biodiesel output varies significantly across the three oil sources.
The flash point increases as the specific gravity of the biodiesel increases. The mixture (1:7) had the highest viscosity value (mm2/s) of 6.44, whereas Jatropha (1:7) had the lowest (1.2).
The biodiesels with the highest and lowest viscosity values, as well as thevetia biodiesels (1:6 and 1:7), do not fulfil ASTM or EN requirements, which range from 1.9 to 6.0 and 3.5 to 5.0, respectively.
Others fulfil the ASTM specifications (Tables 4 and 5). Finally, this study found that Jatropha curcas and Thevetia nerifolia are good prospective sources of oil for biodiesel production.
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