The determination of effects of soybean and hazelnut methyl ester addition to the diesel fuel on the engine performance and exhaust emissions

As biodiesel has better exhaust emissions then the diesel fuel and it is renewable. Biodiesel which is an alternative fuel has become popular worldwide. There are various studies concerning biodiesel fuel and its spraying, combustion and emission properties within the diesel engines. In this paper, soybean biodiesel and hazelnut biodiesel which were produced with the transesterification method were added to the diesel fuel at equal amounts. The engine experiments were performed at 2200 rpm fixed engine speed; and with 5 different loads. While maximum cylinder pressure occurred only wit diesel fuel at full load, the average effective pressure and ignition delay decreased and the combustion duration increased once biodiesel was added. The maximum change in emissions at full load occurred at the mixture of DHS30 (70% diesel +15% hazelnut methyl ester +15% soybean methyl ester) fuel per diesel fuel. CO2 increased by 45.66% while CO emission decreased by 48.88% and smoke emission decreased by 46.03%. The increasing rate of NOx was very high.