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Emission Control Science and Technology

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19-10-2016 | Special Issue: 2016 CLEERS April 6-8, Ann Arbor, MI, USA

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

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

Published in: Emission Control Science and Technology | Issue 1/2017

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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.

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Title: Development of a Global Kinetic Model for a Commercial Lean NOx Trap Automotive Catalyst Based on Laboratory Measurements
Authors: Mahsa Rafigh
Ryan Dudgeon
Josh Pihl
Stuart Daw
Richard Blint
Syed Wahiduzzaman
Publication date: 19-10-2016
Publisher: Springer International Publishing
Published in: Emission Control Science and Technology / Issue 1/2017
Print ISSN: 2199-3629
Electronic ISSN: 2199-3637
DOI: https://doi.org/10.1007/s40825-016-0049-8

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