New operation strategy for driving the selectivity of NOx reduction to N2, NH3 or N2O during lean/rich cycling of a lean NOx trap catalyst
Abstract
Periodical regeneration of NOx storage catalyst (also known as lean NOx trap) by short rich pulses of CO, H2 and hydrocarbons is necessary for the reduction of nitrogen oxides adsorbed on the catalyst surface. Ideally, the stored NOx is converted into N2, but N2O and NH3 by-products can be formed as well, particularly at low-intermediate temperatures. The N2 and N2O products are formed concurrently in two peaks. The primary peaks appear immediately after the rich-phase inception, and tail off with the breakthrough of the reductant front accompanied by NH3 product. In addition, the secondary N2 and N2O peaks then appear at the rich-to-lean transition as a result of reactions between surface-deposited reductants/intermediates (CO, HC, NH3, — NCO) and residual stored NOx under increasingly lean conditions.
- Authors:
-
- Univ. of Chemistry and Technology, Prague (Czech Republic)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1236595
- Alternate Identifier(s):
- OSTI ID: 1396941
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Catalysis B: Environmental
- Additional Journal Information:
- Journal Volume: 182; Journal Issue: C; Journal ID: ISSN 0926-3373
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; NOx storage catalysts; lean NOx trap; NOx reduction; N2O formation; LNT; NSR; exhaust gas aftertreatment; automotive catalysts
Citation Formats
Mráček, David, Koci, Petr, Choi, Jae -Soon, and Partridge, Jr., William P. New operation strategy for driving the selectivity of NOx reduction to N2, NH3 or N2O during lean/rich cycling of a lean NOx trap catalyst. United States: N. p., 2015.
Web. doi:10.1016/j.apcatb.2015.09.002.
Mráček, David, Koci, Petr, Choi, Jae -Soon, & Partridge, Jr., William P. New operation strategy for driving the selectivity of NOx reduction to N2, NH3 or N2O during lean/rich cycling of a lean NOx trap catalyst. United States. https://doi.org/10.1016/j.apcatb.2015.09.002
Mráček, David, Koci, Petr, Choi, Jae -Soon, and Partridge, Jr., William P. Tue .
"New operation strategy for driving the selectivity of NOx reduction to N2, NH3 or N2O during lean/rich cycling of a lean NOx trap catalyst". United States. https://doi.org/10.1016/j.apcatb.2015.09.002. https://www.osti.gov/servlets/purl/1236595.
@article{osti_1236595,
title = {New operation strategy for driving the selectivity of NOx reduction to N2, NH3 or N2O during lean/rich cycling of a lean NOx trap catalyst},
author = {Mráček, David and Koci, Petr and Choi, Jae -Soon and Partridge, Jr., William P.},
abstractNote = {Periodical regeneration of NOx storage catalyst (also known as lean NOx trap) by short rich pulses of CO, H2 and hydrocarbons is necessary for the reduction of nitrogen oxides adsorbed on the catalyst surface. Ideally, the stored NOx is converted into N2, but N2O and NH3 by-products can be formed as well, particularly at low-intermediate temperatures. The N2 and N2O products are formed concurrently in two peaks. The primary peaks appear immediately after the rich-phase inception, and tail off with the breakthrough of the reductant front accompanied by NH3 product. In addition, the secondary N2 and N2O peaks then appear at the rich-to-lean transition as a result of reactions between surface-deposited reductants/intermediates (CO, HC, NH3, — NCO) and residual stored NOx under increasingly lean conditions.},
doi = {10.1016/j.apcatb.2015.09.002},
journal = {Applied Catalysis B: Environmental},
number = C,
volume = 182,
place = {United States},
year = {Tue Sep 08 00:00:00 EDT 2015},
month = {Tue Sep 08 00:00:00 EDT 2015}
}
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Works referenced in this record:
Overview of the Fundamental Reactions and Degradation Mechanisms of NOx Storage/Reduction Catalysts
journal, December 2004
- Epling, William S.; Campbell, Larry E.; Yezerets, Aleksey
- Catalysis Reviews, Vol. 46, Issue 2
NOx adsorption study over Pt–Ba/alumina catalysts: FT-IR and pulse experiments
journal, March 2004
- Nova, I.
- Journal of Catalysis, Vol. 222, Issue 2
Study of the effect of Ba loading for catalytic activity of Pt–Ba/Al2O3 model catalysts
journal, October 2004
- Castoldi, L.; Nova, I.; Lietti, L.
- Catalysis Today, Vol. 96, Issue 1-2
NOxStorage in Barium-Containing Catalysts
journal, April 1999
- Fridell, Erik; Skoglundh, Magnus; Westerberg, Björn
- Journal of Catalysis, Vol. 183, Issue 2
Dynamics of N2 and N2O peaks during and after the regeneration of lean NO trap
journal, May 2015
- Mráček, David; Kočí, Petr; Marek, Miloš
- Applied Catalysis B: Environmental, Vol. 166-167
Insight into the key aspects of the regeneration process in the NOx storage reduction (NSR) reaction probed using fast transient kinetics coupled with isotopically labelled 15NO over Pt and Rh-containing Ba/Al2O3 catalysts
journal, May 2008
- Breen, J. P.; Burch, R.; Fontaine-Gautrelet, C.
- Applied Catalysis B: Environmental, Vol. 81, Issue 1-2
Origin of double dinitrogen release feature during fast switching between lean and rich cycles for NO storage reduction catalysts
journal, August 2014
- Chansai, Sarayute; Burch, Robbie; Hardacre, Christopher
- Journal of Catalysis, Vol. 317
Spatiotemporal distribution of NOx storage and impact on NH3 and N2O selectivities during lean/rich cycling of a Ba-based lean NOx trap catalyst
journal, April 2012
- Choi, Jae-Soon; Partridge, William P.; Pihl, Josh A.
- Catalysis Today, Vol. 184, Issue 1
Global kinetic model for the regeneration of NOx storage catalyst with CO, H2 and C3H6 in the presence of CO2 and H2O
journal, September 2009
- Kočí, Petr; Plát, František; Štěpánek, Jan
- Catalysis Today, Vol. 147
Effective Model for Prediction of N2O and NH3 Formation During the Regeneration of NO x Storage Catalyst
journal, March 2013
- Kočí, Petr; Bártová, Šárka; Mráček, David
- Topics in Catalysis, Vol. 56, Issue 1-8
Dynamics and selectivity of NOx reduction in NOx storage catalytic monolith
journal, September 2008
- Kočí, Petr; Plát, František; Štěpánek, Jan
- Catalysis Today, Vol. 137, Issue 2-4
NH3 formation and utilization in regeneration of Pt/Ba/Al2O3 NOx storage-reduction catalyst with H2
journal, September 2009
- Partridge, William P.; Choi, Jae-Soon
- Applied Catalysis B: Environmental, Vol. 91, Issue 1-2
New insights on N2O formation pathways during lean/rich cycling of a commercial lean NOx trap catalyst
journal, August 2014
- Bártová, Šárka; Kočí, Petr; Mráček, David
- Catalysis Today, Vol. 231
Reaction Pathways in the Reduction of NO x Species by CO over Pt–Ba/Al2O3: Lean NO x Trap Catalytic Systems
journal, July 2009
- Nova, Isabella; Lietti, Luca; Forzatti, Pio
- Topics in Catalysis, Vol. 52, Issue 13-20
New insights into the promoting effect of H2O on a model Pt/Ba/Al2O3 NSR catalyst
journal, June 2010
- Luo, Jin-Yong; Epling, William S.
- Applied Catalysis B: Environmental, Vol. 97, Issue 1-2
In situ FTIR investigation of the role of surface isocyanates in the reduction of NOX by CO and C3H6 over model Pt/BaO/Al2O3 and Rh/BaO/Al2O3 NOX storage and reduction (NSR) catalysts
journal, April 2012
- DiGiulio, Christopher D.; Komvokis, Vasileios G.; Amiridis, Michael D.
- Catalysis Today, Vol. 184, Issue 1
Studying the NO x -trap mechanism over a Pt-Rh/Ba/Al 2 O 3 catalyst by operando FT-IR spectroscopy
journal, January 2003
- Lesage, T.; Verrier, C.; Bazin, P.
- Phys. Chem. Chem. Phys., Vol. 5, Issue 20
Experimental investigation of the reduction of NOx species by CO and H2 over Pt–Ba/Al2O3 lean NOx trap systems
journal, June 2010
- Nova, I.; Lietti, L.; Forzatti, P.
- Catalysis Today, Vol. 151, Issue 3-4
The chemistry of DeNOx reactions over Pt/Al2O3: The oxime route to N2 or N2O
journal, October 2006
- Joubert, E.; Courtois, X.; Marecot, P.
- Journal of Catalysis, Vol. 243, Issue 2
Elucidating NH3 formation during NOx reduction by CO on Pt–BaO/Al2O3 in excess water
journal, April 2012
- Dasari, Prasanna R.; Muncrief, Rachel; Harold, Michael P.
- Catalysis Today, Vol. 184, Issue 1
Modelling of a combined NOx storage and NH3-SCR catalytic system for Diesel exhaust gas aftertreatment
journal, June 2010
- Chatterjee, Daniel; Kočí, Petr; Schmeißer, Volker
- Catalysis Today, Vol. 151, Issue 3-4
Coupled NOx storage and reduction and selective catalytic reduction using dual-layer monolithic catalysts
journal, June 2012
- Liu, Yi; Harold, Michael P.; Luss, Dan
- Applied Catalysis B: Environmental, Vol. 121-122
Works referencing / citing this record:
An overview of after-treatment systems for diesel engines
journal, October 2018
- Ayodhya, Archit Srinivasacharya; Narayanappa, Kumar Gottekere
- Environmental Science and Pollution Research, Vol. 25, Issue 35
High-pressure versus low-pressure exhaust gas recirculation in a Euro 6 diesel engine with lean-NOx trap: Effectiveness to reduce NOx emissions
journal, December 2018
- Lapuerta, Magín; Ramos, Ángel; Fernández-Rodríguez, David
- International Journal of Engine Research, Vol. 20, Issue 1