Abstract: Alternate fuels are promising substitute for current exhaustive uses of petrol and diesel. Biodiesel is derived from renewable resources that can be produced by a simple chemical process using edible, non-edible, waste vegetable oils and animal fats. Jatropha has cetane number near to diesel hence selected as blend in diesel. From research 20% blend of biodiesel was selected as optimum blend. Hence in this research we used Jatropha blends 10%, 25% and 30%. Experiments performed on 240PE Research engine Kirloskar Make 3.5 kW rated power. Ethanol acts as NOx (Oxides of nitrogen) reducing medium so used blend of ethanol in diesel of 5% concentration as higher blends are not stable at room temperature (phase separation problem). Jatropha blends and ethanol blends have shown increase in Brake Specific Fuel Consumption (BSFC). Jatropha 25% blend (J25) and Ethanol 5% blend (E5) shown nearby performance values of mineral diesel hence selected as optimum blends. Jatropha blends increased NOx emissions sufficiently by 40% (J25 blend) and ethanol blends reduced NOx emissions by 24% (E5 blend). From optimum blend, a research blend is created using both Jatropha and Ethanol JDE (J25E5D70) and tested for performance and emissions.

Keywords: Jatropha, Ethanol, Oxides of Nitrogen (NOx), Brake Specific Fuel Consumption (BSFC).