Browse Publications Technical Papers 2001-24-0026
2001-09-23

Soot formation from heavy hydrocarbons representatives of diesel fuel 2001-24-0026

Soot formation from heavy hydrocarbons (n-hexadecane, decahydronaphtalene, N-heptylbenzene and 1-methyl-naphtalene) was studied behind reflected shock waves, using a light extinction technique. The highly diluted mixtures (99 to 99.8% of argon) were heated between 1300 and 2700 K. The pressure ranged from 650 to 1800 kPa. Soot induction delay times, growth rates and yields, were determined under pyrolysis and for two equivalence ratios (5 and 18). The effect of aromaticity, oxygen content, temperature and pressure on these parameters were investigated.
Samples of soot particles formed behind shock waves and collected after experiments have been analyzed by transmission electron microscopy for a magnification of 5x10 4 in order to determine the size of elementary spheres. This parameter was studied in relation with the experimental conditions.

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