Abstract
Authors have previously examined the mechanism by which diesel soot emission is reduced when using Fischer-Tropsh Diesel (FTD) fuel compared with conventional diesel (JIS#2) fuel via Excitation-Emission Matrix analysis of polycyclic aromatic hydrocarbons (PAHs) and high-speed laser shadowgraphy of soot particles in the spray flame. As continuation, this study aims to compare properties of soot particles directly sampled in diesel spray flames fuelled with JIS#2 and FTD fuels by Transmission Electron Microscope (TEM). The diesel spray flame was achieved in a constant volume combustion chamber under diesel-like conditions (2.5MPa, 940K). Concentration, primary particle diameter, gyration radius and fractal dimension of soot aggregates were obtained from the TEM images of soot particles and compared between the two fuel cases.
