The Effect of Diesel and Biodiesel Blends on CI Engine Performance and Emission Characteristics

Abstract

The present work aims to present the suitability of pure jatropha biodiesel and it blends as diesel engine fuel. The jatropha biodiesel is prepared by the alkaline-catalysed transesterification process. The biodiesel blends are prepared in the proportions of 20, 40, 60 and 80%. Experiments are conducted on a single-cylinder water-cooled diesel engine at various loads. The performance characteristics are analysed in terms of brake thermal efficiency and brake specific fuel consumption. The brake thermal efficiency of the engine decreases with increasing proportion of jatropha biodiesel. The exhaust emissions such as HC and CO are reduced as compared with neat diesel. However, NOx emissions are increased. Overall the 20% jatropha biodiesel blend is suitable alternate fuel for a diesel engine without any modifications.