Physicochemical properties of jatropha podagrica biodiesel blends and their effects on tractor engine performance and emission

Abstract

Jatropha biodiesel produced from Jatropha podagrica oil by alkaline-catalysed transesterification was blended with diesel in the ratios of 88:12 wt% (B88) and 12:88 wt% (B12). The fuel properties, consumption rate and exhaust gas emission characteristics of J. podagrica biodiesel, diesel and their blends were assessed. The results showed that J. podagrica seed oil have similar fatty acid profile with those of Jatropha curcas cultivated in Thailand and other South-East Asian countries. Blending of J. podagrica biodiesel and diesel enhanced the fuel properties of the blends, similar to those of the diesel. However, the B88 blend emitted lesser pollutants when compared to B12 and petrol diesel, making it very ideal for use as a promising alternative to the petrol diesel used in the mini tractor for farming activities. The results from the current study form a basis for further research on the use of B88 as a fuel source.