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

Mráček, David; Koci, Petr; Choi, Jae -Soon; Partridge, Jr., William P.

doi:10.1016/j.apcatb.2015.09.002

Title: New operation strategy for driving the selectivity of NO_x reduction to N₂, NH₃ or N₂O during lean/rich cycling of a lean NO_x trap catalyst

Journal Article · Tue Sep 08 00:00:00 EDT 2015 · Applied Catalysis B: Environmental

DOI:https://doi.org/10.1016/j.apcatb.2015.09.002· OSTI ID:1236595

Mráček, David ^[1]; Koci, Petr ^[1]; Choi, Jae -Soon ^[2]; Partridge, Jr., William P. ^[2]

Univ. of Chemistry and Technology, Prague (Czech Republic)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Periodical regeneration of NO_x storage catalyst (also known as lean NO_x 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 NO_x 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 NO_x under increasingly lean conditions.

View Accepted Manuscript (DOE)

View Accepted Manuscript (Publisher)

Cite

Export

Save

Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1236595

Alternate ID(s):: OSTI ID: 1396941

Journal Information:: Applied Catalysis B: Environmental, Vol. 182, Issue C; ISSN 0926-3373

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 29 works

Citation information provided by
Web of Science

References (22)

Overview of the Fundamental Reactions and Degradation Mechanisms of NOx Storage/Reduction Catalysts Epling, William S.; Campbell, Larry E.; Yezerets, Aleksey Catalysis Reviews, Vol. 46, Issue 2 https://doi.org/10.1081/CR-200031932	journal	December 2004
NOx adsorption study over Pt–Ba/alumina catalysts: FT-IR and pulse experiments Nova, I. Journal of Catalysis, Vol. 222, Issue 2 https://doi.org/10.1016/j.jcat.2003.11.013	journal	March 2004
Study of the effect of Ba loading for catalytic activity of Pt–Ba/Al2O3 model catalysts Castoldi, L.; Nova, I.; Lietti, L. Catalysis Today, Vol. 96, Issue 1-2 https://doi.org/10.1016/j.cattod.2004.05.006	journal	October 2004
NOxStorage in Barium-Containing Catalysts Fridell, Erik; Skoglundh, Magnus; Westerberg, Björn Journal of Catalysis, Vol. 183, Issue 2 https://doi.org/10.1006/jcat.1999.2415	journal	April 1999
Dynamics of N2 and N2O peaks during and after the regeneration of lean NO trap Mráček, David; Kočí, Petr; Marek, Miloš Applied Catalysis B: Environmental, Vol. 166-167 https://doi.org/10.1016/j.apcatb.2014.12.002	journal	May 2015
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 Breen, J. P.; Burch, R.; Fontaine-Gautrelet, C. Applied Catalysis B: Environmental, Vol. 81, Issue 1-2 https://doi.org/10.1016/j.apcatb.2007.12.016	journal	May 2008
Origin of double dinitrogen release feature during fast switching between lean and rich cycles for NO storage reduction catalysts Chansai, Sarayute; Burch, Robbie; Hardacre, Christopher Journal of Catalysis, Vol. 317 https://doi.org/10.1016/j.jcat.2014.05.020	journal	August 2014
Spatiotemporal distribution of NOx storage and impact on NH3 and N2O selectivities during lean/rich cycling of a Ba-based lean NOx trap catalyst Choi, Jae-Soon; Partridge, William P.; Pihl, Josh A. Catalysis Today, Vol. 184, Issue 1 https://doi.org/10.1016/j.cattod.2011.11.007	journal	April 2012
Global kinetic model for the regeneration of NOx storage catalyst with CO, H2 and C3H6 in the presence of CO2 and H2O Kočí, Petr; Plát, František; Štěpánek, Jan Catalysis Today, Vol. 147 https://doi.org/10.1016/j.cattod.2009.07.036	journal	September 2009
Effective Model for Prediction of N2O and NH3 Formation During the Regeneration of NO x Storage Catalyst Kočí, Petr; Bártová, Šárka; Mráček, David Topics in Catalysis, Vol. 56, Issue 1-8 https://doi.org/10.1007/s11244-013-9939-y	journal	March 2013
Dynamics and selectivity of NOx reduction in NOx storage catalytic monolith Kočí, Petr; Plát, František; Štěpánek, Jan Catalysis Today, Vol. 137, Issue 2-4 https://doi.org/10.1016/j.cattod.2007.11.023	journal	September 2008
NH3 formation and utilization in regeneration of Pt/Ba/Al2O3 NOx storage-reduction catalyst with H2 Partridge, William P.; Choi, Jae-Soon Applied Catalysis B: Environmental, Vol. 91, Issue 1-2 https://doi.org/10.1016/j.apcatb.2009.05.017	journal	September 2009
New insights on N2O formation pathways during lean/rich cycling of a commercial lean NOx trap catalyst Bártová, Šárka; Kočí, Petr; Mráček, David Catalysis Today, Vol. 231 https://doi.org/10.1016/j.cattod.2013.11.050	journal	August 2014
Reaction Pathways in the Reduction of NO x Species by CO over Pt–Ba/Al2O3: Lean NO x Trap Catalytic Systems Nova, Isabella; Lietti, Luca; Forzatti, Pio Topics in Catalysis, Vol. 52, Issue 13-20 https://doi.org/10.1007/s11244-009-9341-y	journal	July 2009
New insights into the promoting effect of H2O on a model Pt/Ba/Al2O3 NSR catalyst Luo, Jin-Yong; Epling, William S. Applied Catalysis B: Environmental, Vol. 97, Issue 1-2 https://doi.org/10.1016/j.apcatb.2010.04.007	journal	June 2010
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 DiGiulio, Christopher D.; Komvokis, Vasileios G.; Amiridis, Michael D. Catalysis Today, Vol. 184, Issue 1 https://doi.org/10.1016/j.cattod.2011.11.022	journal	April 2012
Studying the NO _x -trap mechanism over a Pt-Rh/Ba/Al ₂ O ₃ catalyst by operando FT-IR spectroscopy Lesage, T.; Verrier, C.; Bazin, P. Phys. Chem. Chem. Phys., Vol. 5, Issue 20 https://doi.org/10.1039/B305874N	journal	January 2003
Experimental investigation of the reduction of NOx species by CO and H2 over Pt–Ba/Al2O3 lean NOx trap systems Nova, I.; Lietti, L.; Forzatti, P. Catalysis Today, Vol. 151, Issue 3-4 https://doi.org/10.1016/j.cattod.2010.02.075	journal	June 2010
The chemistry of DeNOx reactions over Pt/Al2O3: The oxime route to N2 or N2O Joubert, E.; Courtois, X.; Marecot, P. Journal of Catalysis, Vol. 243, Issue 2 https://doi.org/10.1016/j.jcat.2006.07.018	journal	October 2006
Elucidating NH3 formation during NOx reduction by CO on Pt–BaO/Al2O3 in excess water Dasari, Prasanna R.; Muncrief, Rachel; Harold, Michael P. Catalysis Today, Vol. 184, Issue 1 https://doi.org/10.1016/j.cattod.2011.12.009	journal	April 2012
Modelling of a combined NOx storage and NH3-SCR catalytic system for Diesel exhaust gas aftertreatment Chatterjee, Daniel; Kočí, Petr; Schmeißer, Volker Catalysis Today, Vol. 151, Issue 3-4 https://doi.org/10.1016/j.cattod.2010.01.014	journal	June 2010
Coupled NOx storage and reduction and selective catalytic reduction using dual-layer monolithic catalysts Liu, Yi; Harold, Michael P.; Luss, Dan Applied Catalysis B: Environmental, Vol. 121-122 https://doi.org/10.1016/j.apcatb.2012.04.013	journal	June 2012

Cited By (2)

An overview of after-treatment systems for diesel engines Ayodhya, Archit Srinivasacharya; Narayanappa, Kumar Gottekere Environmental Science and Pollution Research, Vol. 25, Issue 35 https://doi.org/10.1007/s11356-018-3487-8	journal	October 2018
High-pressure versus low-pressure exhaust gas recirculation in a Euro 6 diesel engine with lean-NOx trap: Effectiveness to reduce NOx emissions Lapuerta, Magín; Ramos, Ángel; Fernández-Rodríguez, David International Journal of Engine Research, Vol. 20, Issue 1 https://doi.org/10.1177/1468087418817447	journal	December 2018

Similar Records

Dynamics of N₂ and N₂O peaks during and after the regeneration of lean NO_x trap

Journal Article · Thu Dec 04 00:00:00 EST 2014 · Applied Catalysis. B, Environmental · OSTI ID:1236595

Mráček, David; Koci, Petr; Marek, Milos; +3 more

Ammonia reactions with the stored oxygen in a commercial lean NO_x trap catalyst

Journal Article · Sun Oct 12 00:00:00 EDT 2014 · Chemical Engineering Journal · OSTI ID:1236595

Bartova, Sarka; Mracek, David; Koci, Petr; +2 more

Passive SCR for lean gasoline NO_X control: Engine-based strategies to minimize fuel penalty associated with catalytic NH₃ generation

Journal Article · Thu Feb 18 00:00:00 EST 2016 · Catalysis Today · OSTI ID:1236595

Prikhodko, Vitaly Y.; Parks, James E.; Pihl, Josh A.; +1 more

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
NOx storage catalysts
lean NOx trap
NOx reduction
N2O formation
LNT
NSR
exhaust gas aftertreatment
automotive catalysts

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

Citation Formats

References (22)

Cited By (2)

Similar Records

Related Subjects

Title: New operation strategy for driving the selectivity of NO_x reduction to N₂, NH₃ or N₂O during lean/rich cycling of a lean NO_x trap catalyst