Soot and PAH Formation from Toluene and n-Heptane
Speaker: Fabian Mauss, Brandenburg University of Technology, Germany
Series: MAE Departmental Seminars
Location: J223 Equad
Date/Time: Thursday, September 27, 2012, 2:00 p.m. - 3:00 p.m.
In this presentation models for soot and PAH formation in toluene and n-heptane flames will be presented by the help of reaction pathway and sensitivity analysis. It is demonstrated that small amounts of toluene can cause a significant raise in soot particle nucleation in blends of n-heptane and toluene. Soot formation from spray flames, gas turbines or Diesel engines is sensitive on the aromatic content in the fuel. New developments for gasoline engines cause that the formation of soot becomes an issue for these engines as well. The recently proposed toluene reference fuel (TRF) includes a significant amount of toluene, which is seen as promoter of soot formation. Thus it is important to develop predictive models for soot and PAH formation for aromatic and non-aromatic fuel components. One major problem in this development is the fact, that the aromatic fuel species and intermediates in their oxidation paths are at the same time intermediates in the PAH formation paths of the non-aromatic fuel species. Thus growth and oxidation reactions and their dependence on temperature, composition and pressure need to be adjusted for both phenomena.