Impact of Biodiesel on the Oxidation Kinetics and Morphology of Diesel Particulate

Conference · Sat Jan 01 04:00:00 EST 2011

OSTI ID:1009489

Strzelec, Andrea ^[1]; Toops, Todd J ^[1]; Daw, C Stuart ^[1]

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1. ORNL

We compare the oxidation characteristics of four different diesel particulates generated with a modern light-duty engine. The four particulates represent engine fueling with conventional ultra-low sulfur diesel (ULSD), biodiesel, and two intermediate blends of these fuels. The comparisons discussed here are based on complementary measurements implemented in a laboratory micro-reactor, including temperature programmed desorption and oxidation, pulsed isothermal oxidation, and BET surface area. From these measurements we have derived models that are consistent with the observed oxidation reactivity differences. When accessible surface area effects are properly accounted for, the oxidation kinetics of the fixed carbon components were found to consistently exhibit an Arrhenius activation energy of 113 6 kJ/mol. Release of volatile carbon from the as-collected particulate appears to follow a temperaturedependent rate law.

• Research Organization: Oak Ridge National Laboratory (ORNL); Fuels, Engines and Emissions Research Center
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1009489
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
33 ADVANCED PROPULSION SYSTEMS
ACTIVATION ENERGY
Biodiesel
CARBON
COMBUSTION
DESORPTION
Diesel
ENGINES
KINETICS
MORPHOLOGY
OXIDATION
Oxidation
PARTICULATES
Particulate
SULFUR
SURFACE AREA
Soot