Experimental investigation of the influence of isobutanol addition on engine performance and emissions of a direct ignition diesel engine fuelled by biodiesel blends derived from waste vegetable oil

Biodiesel has become one of the potential alternative sources to replace diesel. Some of the limitations of biodiesel include high NOx, poor atomization, poor oxidation stability, cold flow problems, long term storage problems etc. Various strategies were discussed to overcome the limitations of biodiesels. Recent research is on effects of fuel additives or fuel composition modification to reformulate the fuel properties. This article is aimed at presenting the experimental investigation of the effects of isobutanol additive on the engine performance and emission characteristics of biodiesel blends derived from waste vegetable oils. The experimental investigation was conducted on a direct injection four stroke diesel engine with different blends, B10, B20, B30, B10 (10% ISB, B20 (10% ISB), B30 (10% ISB), (20% ISB, B20 (20% ISB) and B30 (20% ISB), and engine performance and emission characteristics are evaluated and discussed.