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The rising cost and exponential depletion of crude oil in international market has provided an opportunity for the researchers to evaluate the utilization and suitability of various renewable fuels. Amongst variety of alternative fuels, biofuels have the potential to mitigate the vulnerability and the adverse effects of use of fossil fuels. Vegetable/plant oil is better proposition as alternative fuel for diesel engine having much advantage over other alternative fuels. Orange oil from its peel has a huge potential and can be used as an alternate fuel at the most economical purchase rate. In the present investigation experiments were carried out to evaluate performance and emission characteristics of Orange peel oil methyl ester blends (OPOME) (10%, and 20% by volume) on unmodified diesel engine. The properties of these blends were found to be comparable to diesel and confirming to both the American and European standards.

The rising cost and limited availability of crude oil in international market has provided an opportunity to look for substitute of fossil fuel. Scientists all over the world are experimenting on variety of renewable fuels for meeting the future energy demands. Bio origin fuels are fast becoming potential alternative resources to replace the fossil fuels. The vegetable oils, derived from oil seed crops have got 90 to 95% energy value of diesel on volume basis, comparable cetane number and can substitute upto 20% (v/v) of diesel fuel. Mahua seed oil is common ingredient of hydrogenated fat. Two-step transesterification process was employed to synthesize biodiesel from Mahua Oil (Madhuca-indica) and analysis of Physico-chemical properties as well as the combustion, performance and emission characteristics was done by taking 10, 20 and 100 % blend with diesel. The physico-chemical properties of the blends were found to be comparable to diesel.