Abstract & Overview
This work involved a study on comparison of the environmental impact of diesel engines using biodiesel from rice-bran oil by Single & Two-step methods. The results indicated that the outputs obtained from the test conducted with 11.5 horsepower constant-speed farm diesel engine using rice-bran oil biodiesel were similar to those of diesel fuel. For the exhaust emission, biodiesel was found to produce less carbonmonoxide and carbon dioxide than diesel fuel because the fraction of oxygen in biodiesel was higher than diesel fuel leading to more complete combustion.The result of this study revealed that biodiesel can be used directly in a diesel engine without any engine modification. However, more research is required to study the effects of the durability, if biodiesel is to be used in diesel engines over a long time period for make sure that this biodiesel was capable of being use as an alternative fuel in the future.