Effects of biodiesel obtained from Canola, sefflower oils and waste oils on the engine performance and exhaust emissions

Biodiesel is a non-toxic, high-cetane, lubricating, biodegradable and renewable alternative diesel engine fuel that contains no sulfur but oxygen in its composition. It can be used in diesel engines in mixed or pure form without any modification. In this study, the effects of using biodiesel consisting of canola, safflower and waste oil mixture obtained by transesterification as well as biodiesel and diesel fuel mixtures of different ratios as a fuel in a four-stroke, single cylinder, air-cooled, direct injection diesel engine, on the engine performance and exhaust emissions were examined. As a result of the experiments suggested that as the biodiesel ratio in the mixture increased, in comparison to diesel fuel, specific fuel consumption and brake thermal efficiency increased as the ratio of BD75 and decreased by 1.95% for BD100. According to results of the emission analysis, the mixture was found to be stable in comparison to diesel fuel, as the average carbon monoxide (CO) amount decreased by 34.28%, hydrocarbon (HC) amount decreased by 17.49%, smoke emission decreased by 50.95% for the given engine load whereas nitric oxide (NOx) increased by 80.50% and carbon dioxide (CO2) increased by 42.62% for the given engine load.