Performance analysis of jatropha biodiesel fuel blends with antioxidant in a multi-cylinder diesel engine

This work examine the effect of 4- Dimethylaminobenzaldehyde (DM) antioxidant and jatropha biodiesel on the performance of a multi cylinder diesel engine. Later 30%, 35% and 40% of biodiesel blends (B30, B35 and B40) and DM antioxidant at concentration of 1000 ppm were investigated. The physical properties such as viscosity, density, calorific value and flash point were investigated and found closely matched with the values of diesel fuel. Engine performance of brake specific fuel consumption (BSFC), brake power (BP), brake thermal efficiency (BTE), indicated power (IP), indicated specific fuel consumption (ISFC) and mechanical efficiency (ME) were studied at different speeds and loads. Higher BP and lower BSFC were observed for D65B35DM and D70B30DM fuel blends at engine speed of 1750 rpm compared to D60B40DM blend. BTE of 47.7% was observed at engine speed of 2000 rpm with D70B30DM blend. It is concluded that 4-Dimethylaminobenzaldehyde antioxidant addition to jatropha biodiesel enhances engine performance.