抄録
The emissions of pollutant metals from marine diesel engines were investigated by an X-ray fluorescence spectrometer. The emission measurements were carried out using two medium speed 4-stroke engines operating on different fuels, which are HFO, MDO, MGO, rapeseed oil, palm oil, used cooking oil and BDF. The specific emissions showed significant variations between the different fuels and given engine loads. The soot emissions of 0.4 -1.6 g/kWh were determined for HFO, which are an order of magnitude larger than those for the other fuels. The soot emissions at 25% load for vegetable oils except BDF significantly increased, being larger than that for MDO. The emissions of impurities, which include sulfur, phosphorus and metals, for used cooking oil showed larger than those for MDO, MGO and the other vegetable oils. Sulfur accounted for about 50-90% of impurities emissions for MDO and HFO. The specific emissions of Ni, V and Zn, known as priority pollutant metals, were about 10 mg/kWh for HFO.
