Development of a Global Kinetic Model for a Commercial Lean NOx Trap Automotive Catalyst Based on Laboratory Measurements

Mahsa Rafigh; Ryan Dudgeon; Josh Pihl; Stuart Daw; Richard Blint; Syed Wahiduzzaman

doi:10.1007/s40825-016-0049-8

Development of a Global Kinetic Model for a Commercial Lean NO_x Trap Automotive Catalyst Based on Laboratory Measurements

Mahsa Rafigh, Ryan Dudgeon, Josh Pihl, Stuart Daw, Richard Blint, Syed Wahiduzzaman

Buildings and Transportation Science Div

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We summarize a global kinetic model for a commercial automotive Lean NO_x Trap (LNT) catalyst derived from laboratory flow reactor measurements at Oak Ridge National Laboratory (ORNL). The experimental measurements were made according to a modified version of a publicly shared protocol developed for characterizing the dynamic responses of LNT catalysts over a temperature range of 150–550 °C under lean-rich cycling with CO, H₂, and C₃H₆ as the reductants. The resulting model includes three NO_x storage sites. The present model also includes reactions for oxygen storage, water gas shift, steam reforming, NO_x reduction, and N₂O and NH₃ generation. When implemented in 1D integral reactor simulations of long-period cycling, the model was found to accurately predict the observed outlet concentrations of CO, H₂, C₃H₆, NO, NO₂, NH₃, and N₂O.

Original language	English
Pages (from-to)	73-92
Number of pages	20
Journal	Emission Control Science and Technology
Volume	3
Issue number	1
DOIs	https://doi.org/10.1007/s40825-016-0049-8
State	Published - Mar 1 2017

Funding

This manuscript has been coauthored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). Acknowledgments This work was sponsored in part by the U.S. Department Of Energy Office Of Vehicle Technologies, with Gurpreet Singh and Ken Howden as project managers. This work was also funded in part through the Gamma Technologies Research Initiatives Program

Keywords

Emission regulation
Lean NO Trap
NO storage reduction
Oxygen storage capacity

Access to Document

10.1007/s40825-016-0049-8

Cite this

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title = "Development of a Global Kinetic Model for a Commercial Lean NOx Trap Automotive Catalyst Based on Laboratory Measurements",

abstract = "We summarize a global kinetic model for a commercial automotive Lean NOx Trap (LNT) catalyst derived from laboratory flow reactor measurements at Oak Ridge National Laboratory (ORNL). The experimental measurements were made according to a modified version of a publicly shared protocol developed for characterizing the dynamic responses of LNT catalysts over a temperature range of 150–550 °C under lean-rich cycling with CO, H2, and C3H6 as the reductants. The resulting model includes three NOx storage sites. The present model also includes reactions for oxygen storage, water gas shift, steam reforming, NOx reduction, and N2O and NH3 generation. When implemented in 1D integral reactor simulations of long-period cycling, the model was found to accurately predict the observed outlet concentrations of CO, H2, C3H6, NO, NO2, NH3, and N2O.",

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AU - Blint, Richard

AU - Wahiduzzaman, Syed

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