The use of biodiesel, the methyl esters of vegetable oils are becoming popular due to their low environmental impact and potential as a green alternative fuel for diesel engine. The aim of this presentation is to study the potential use of Corn oil, Rice Bran oil and Castor oil methyl ester as a substitute for diesel fuel in diesel engine. B25 blend of Corn oil, Rice Bran oil and Castor oil and Diesel is prepared by transesterification process on volume basis and used as fuels in a four stroke single cylinder diesel engine to study the performance and emission characteristics of these fuels and compared with neat diesel fuel. The engine tests have been carried out with the aim of obtaining Emission levels and the behavior of the diesel engine running on Corn oil, Castor Oil and Rice Bran oil blend. Also, the property testing of these biofuels were carried out. This oil blend substantially reduces the emission of NO, CO and increases the emission of O2 gases in exhaust gases. The emissions of these gases for the 3 biofuels and diesel are compared and analysed at 3 injection pressures of 180 bar, 200 bar and 230 bar.

Keywords: Biodiesel, Castor oil, Corn oil, Injection pressure, Rice bran oil