Study on combustion and NOx emission characteristics of a DI diesel engine operating on pistache seed biodiesel/diesel and methanol/diesel blends

The experiments of the emissions of diesel engine fueled with the pistache seed biodiesel diesel fuel and methanol - diesel fuel were performed on YTR3105 diesel engine. The NOx emission and combustion characteristics of the engine fueled with the two kinds of blend fuels were investigated, the adiabatic flame temperature was calculated. The effects of burning delay, burning duration and air-fuel ratio on NOx emission were discussed. The results show that the NOx emission of the two kinds of fuels increases with the increase of engine load. With the increase of the blending ratio, the NOx emission of engine fueled with pistache seed biodiesel and the pure diesel engine are equal to or slightly increase. The NOx emission of methanol - diesel fuel decreases with the increase of the blending ratio. The adiabatic flame temperature of Methanol - diesel fuel is far lower than the pistache seed biodiesel - diesel.