Author : K.V.L.Bhuvaneswary and Digvijay.B.Shelke

Biodiesel in recent days are so extensively studied for the sake of using it as an alternate fuel in diesel engine which constitutes the major role in transportation. In the current paper the Calophyllum Inophyllum biodiesel is prepared by using thermal cracking process .The thermo properties of the biodiesel derived from the above process is tested according to ASTM standards. Experiments were conducted on Variable Compression ratio Engine and Performance parameters were determined like Brake Power, Brake Specific Fuel Consumption, Volumetric and Brake Thermal Efficiency. Later Exhaust Emission parameters like CO, CO2, HC and NOx were determined for biodiesel-diesel blends of 20%, 40%, 60%, 80% and 100%, by incrementing load by 25% and varying compression ratio from 15.5 to 17.5 at constant speed of 1500 rpm, injection pressure of 200 bar and injection timing of 27ObTDC. The emissions shown by Pure Calophyllum biodiesel and B20 are much better and cleaner in comparison to diesel wherein the Carbon monoxide emission and Hydrocarbon emission reduced by 52% and 49.8%. The Nitrogen Oxides emission rose due to significant raise in exhaust gas temperature by 2.1%. The Brake specific fuel consumption and Brake Mean Effective pressure increased by 24.3% and 52% .

Keywords: Fatty Acid Methyl ester, Calophyllum Inophyllum Biodiesel, Variable compression ratio Diesel Engine, Emissions and Performance.