Physico-chemical screening of accessions of Jatropha curcas for biodiesel production

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• 作者：B. Naresh^a ; M. Srikanth Reddy^a ; P. Vijayalakshmi^b ; Veena Reddy^a ; Prathibha Devi^a ; ^{prathi56@yahoo.com}
• 关键词：Jatropha curcas ; Biodiesel ; Yield ; Seed-oil ; Physico-chemical characterization
• 刊名：Biomass and Bioenergy
• 出版年：2012
• 期刊代码：3_09619534
• 类别：pw
• 出版时间：May, 2012
• 卷：40
• 期：Complete
• 页码：155-161
• 文件大小：637 K

摘要

Biodiesel is an alternative environmentally friendly fuel made from renewable biological sources such as vegetable oils and animal fats. The present report deals with screening of 14 accessions of Jatropha curcas collected from all over India to find the most suitable ones for production of Biodiesel. From the 14 accessions of J. curcas located in the plantation at Osmania University, 4 accessions were initially selected on the basis of traits like general appearance, pest resistance, seed yield and seed-oil content. Further, the seed-oil of these 4 accessions was characterized by physico-chemical analysis to identify the elite accessions for production of biodiesel. Highest 1000-seed weight (640聽g) and highest percentage seed-oil content (50.16) (extracted by Soxhlet method with hexane as the solvent) was recorded in the 鈥淜M鈥?accession. The transesterification process is affected by the presence of high free fatty acids (recorded in 鈥淢B鈥?accession) and high moisture content (recorded in 鈥淜M鈥?accession) of the seed-oil which also interfere with the separation of fatty esters and glycerol during production of Biodiesel. Further, high phosphorus content and iodine number (recorded in 鈥淢B鈥?accession) interfere with conversion of seed-oil to Biodiesel. In the above context, in spite of its yield being lower, the seed-oil of the 鈥淩SAD鈥?accession was found to be most suitable for Biodiesel production followed by 鈥淜M鈥? 鈥淔.W.B鈥?and 鈥淢B鈥?accessions, since it contains lower free fatty acids, acid value, viscosity, diglycerides and iodine number.