This paper reviews some past and recent work on the impact of Ultra Clean Fuels on the characteristics of diesel soot, including ultra low sulfur diesel fuel, biodiesel and Fischer-Tropsch diesel fuel. In comparing past work where soot samples were generated without strict control over the fuel injection parameters with more recent work where injection timing and combustion phasing were matched between test fuels, the soot characteristics that determine soot oxidative reactivity are different. The results discussed here provide an improved insight into the relationship between the properties of fuels, the properties of the soots derived from the diesel combustion of fuels and the oxidative reactivity of soot. These results show that instead of oxygen content, it is the nanostructure and its relationship to availability of edge sites and active surface area on the soot that controls oxidative reactivity.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)