Effects of Extraction Methods and Transesterification Temperature on the Qualities of Biodiesel from Jatropha Seed’s Oil
Journal Title: Invention Journal of Research Technology in Engineering & Management - Year 2018, Vol 2, Issue 6
Abstract
Jatropha curcas oil has been considered a promising alternative fuel for compressing ignition engines. However, its qualities and utilizations have been affected by so many factors such as extraction methods, temperatures, reactants, etc. As a result, this work was aimed at studying the effects of extraction methods and transesterification temperature on the qualities of biodiesel from jatropha oil seeds. Three methods of extraction (milling hydraulic, and defatting; milling, toasting, and defatting: and sand roasting, dehulling, milling and defatting) were employed to produce the three different samples A, B, and C respectively. The yields of the oils obtained were measured. Oil qualities of the oil like: specific gravity, viscosity, free fatty acid, saponification value, peroxide value, pH and iodine value content of the oil were determined. The extracted oils were subjected to transesterification process at a various temperature by treatment with ethanol using potassium hydroxide as catalyst. Average yield of biodiesel was 70.62 %, 74.33% and 79.41% of raw oil from sample A, B and C respectively. The specific gravity, viscosity, free fatty acid, saponification value, peroxide value, pH and iodine value content of the oil of sample were A (0.904, 3.240mm2/s, 0.431% ,64.80mg/kg, 2.00mg/kg, 7.38 and 140.61, respectively); sample B (0.903, 3.130mm2/s, 0.423%, 58.91mg/kg, 11.00mg/kg, 7.02 and 55.33, respectively); sample C (0.908, 3.324mm2/s, 0.368%, 52.73mg/kg, 2.00mg/kg, 8.50 and 143.65 respectively). The result revealed that different extraction methods and transesterification temperature have actually affected the quantity and quality of biodiesel produced from Jatropha oil seeds. Processing of the oil seeds by roasting dehulling, milling and defatting and transesterification at 700C gave the highest oil yield and the most acceptable chemical properties.
Authors and Affiliations
Oniya O. O
Keywords
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