Modeling chemistry in lean NO_x traps under reducing conditions

Conference · Sun Jan 01 00:00:00 EST 2006

OSTI ID:1003645

Larson, Rich ^[1]; Chakravarthy, Veerathu K ^[2]; Pihl, Josh A ^[2]; Daw, C Stuart ^[2]

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1. Sandia National Laboratories (SNL)
2. ORNL

A set of elementary surface reactions is proposed for modeling the chemistry in a lean NOx trap during regeneration (reduction of stored NOx). The proposed reaction mechanism can account for the observed product distribution from the trap over a range of temperatures and inlet gas compositions similar to those expected for realistic operation. The mechanism includes many reactions already discussed in the literature, together with some hypothesized reactions that are required to match observations from temperature programmed reactor experiments with a commercial lean NOx trap catalyst. Preliminary results indicate that the NOx trap regeneration and byproduct formation rates can be effectively captured by using a relatively compact set of elementary reactions.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1003645
• Resource Relation: Conference: SAE 2006 Fall Powertrain Conference, Toronto, Canada, 20061105, 20061105
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHEMISTRY
DISTRIBUTION
REACTION KINETICS
REGENERATION
SIMULATION