Browse Publications Technical Papers 2003-01-0833
2003-03-03

Experimental Determination of the Kinetics of Diesel Soot Oxidation by O2 - Modeling Consequences 2003-01-0833

Several complementary experimental techniques were applied to investigate kinetics of diesel soot oxidation by O2 in an attempt to provide accurate data for modeling of the Diesel Particulate Filters regeneration process. For two diesel soot samples with measurably different properties, it was shown that the complexity of their overall kinetic behavior was due to an initial period of rapidly changing reactivity. This initial high reactivity was understood not to be related to the SOF, and was quantitatively correlated to the extent of soot pre-oxidation. This initial reactivity can affect the averaged apparent kinetic parameters, for example resulting in the lower apparent activation energy values.
After the initial soot pre-oxidation, which consumed ∼10-25% of carbon, the remaining soot was behaving very uniformly, producing linear Arrhenius plots in a remarkably broad range of temperatures (330-610°C) and integral conversions (up to 90%). The two samples of diesel soot were found to behave differently even after the SOF desorption and pre-oxidation, with the measurable difference in the light-off characteristics (∼20-30°C) and activation energies (126±3 and 143±3 kJ/mol).
Good mathematical description of the results was obtained using the hypothesis that reaction order with respect to soot mass is close to unity. Implications of the first order are discussed, including its effect on the model structure.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Microstructural Aspects of Soot Oxidation in Diesel Particulate Filters

2004-01-0693

View Details

TECHNICAL PAPER

The Optimum Cell Density for Wall-Flow Monolithic Filters: Effects of Filter Permeability, Soot Cake Structure and Ash Loading

2004-01-1133

View Details

TECHNICAL PAPER

Catalytic Filter Systems with Direct and Indirect Soot Oxidation Activity

2005-01-0670

View Details

X