Soot formation in premixed heptane-toluene flames

In this work soot formation was studied in a series of laminar premixed flames fueled with binary heptane-toluene mixtures. The equivalence ratio (φ = 2), the cold gas velocity and the total carbon flow rate were kept constant changing accordingly the oxygen content and the diluent (N2) concentration. A very similar temperature up to 80% of toluene concentration was obtained and, hence, a direct comparison between particle formation from such...