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Possibility of converting indigenous Salvadora persica L. seed oil into biodiesel in Pakistan

Ali, Mehmood, Naqvi, Beena, Watson, Ian A.
International journal of green energy 2018 v.15 no.7 pp. 427-435
Salvadora persica, biodiesel, energy efficiency, equipment, indigenous species, oxidation, seed oils, sulfur, thermal analysis, transesterification, vegetables, viscosity, weight loss, Pakistan
In this research study, biodiesel has been successfully produced from vegetable seed oil of an indigenous plant Salvadora persica L. that meets the international biodiesel standard (ASTM D6751). The biodiesel yield was 1.57 g/5 g (31.4% by weight) and the in-situ transesterification ester content conversion was 97.7%. The produced biodiesel density was 0.894 g/mL, its kinematic viscosity 5.51 mm²/s, HHV 35.26 MJ/kg, flash point 210°C, cetane no. 61, and sulfur content 0.0844%. Thermal analysis of the biodiesel showed that 97% weight loss was achieved at 595°C with total oxidation of the biodiesel. The production energy efficiency was 0.46% with a lab scale setup, assuming the volume fraction ratio (volume of the sample/total volume of the equipment used). The results revealed that single-step in-situ transesterification method is suitable for the production of biodiesel from S. persica seed oil.