Effect of corona discharge on particle charge characteristics of diesel engine fuelled with Fe-FBC

摘要

Four kinds of tested fuels were prepared by adding Fe fuel-borne catalyst (Fe-FBC) to diesel at mass concentrations of 0, 100, 200 and 300 mg/kg, named as Diesel, Fe100, Fe200 and Fe300, respectively. Effects of discharge voltage on particle charge characteristic of diesel exhaust were carried out on a bipolar charge agglomeration test bench. Engine exhaust particle sizer and Zeta potential analyser were used to study the particle number concentration and surface electrical charge. The results show that the particle diameter of the peak number concentration becomes smaller with the increase of Fe-FBC content. Based on electrical charge agglomeration, particle coagulation efficiency increases with the increase of discharge voltage and Fe-FBC content, and particle number concentration of Fe300 has the greatest reduction. Besides, both Zeta potential and particle-surface charge increase with the increment of discharge voltage, and particles of Fe300 have the best charging performance among all tested fuels.