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Automotive engine emissions are disturbing the ecological system and it has caused major impact on flora & fauna and environment. The major motive force behind this research is to find the alter-native fuel for the future sustainable mobility and less dependence on the fossil fuels. Biodiesel fuel produced from non-edible oil (like castor) could be used to replace a considerable portion of the conventional fuel consumed worldwide. Castor oil is selected for this study considering a fact that India is a major contributor in global castor oil seed production and also it, being a non-edible oil, avoids the cold-war between food vs fuel. The present study has been conducted in three phases.

Biodiesel is an alternative fuel for diesel which is made through a chemical process which converts vegetable oils and fats of natural origin into fatty acid methyl esters (FAME). The most usual method to transform Bio-oil into biodiesel is Transesterification that can be carried out using different catalyst systems. Jatropha is second generation, non-edible oil and can be used for producing biodiesel. The Transesterification reaction consists of heating jatropha oil with proper concentration of methanol at appropriate temperature in the presence of catalyst. After reaction, the mixture is allowed to settle down for 8-10 hrs. Two separate layers, top layer of biodiesel and lower layer of glycerol will form, which can be separated. Reaction temperature, amount of methanol, catalyst and reaction time are important parameters which decide yield and quality of biodiesel.