The Effects of Aging Temperature and Air-Fuel Ratio on the NOx Storage Capacity of a Lean NOx Trap

2004 ◽  
Author(s):  
Joseph R. Theis ◽  
Justin A. Ura ◽  
George W. Graham ◽  
Hung-Wen Jen ◽  
John J. Li ◽  
...  
Keyword(s):  
Aging Temperature ◽  
Storage Capacity ◽  
Nox Storage ◽  
Lean Nox Trap ◽  
Nox Trap ◽  
Fuel Ratio ◽  
Nox Storage Capacity ◽  
Lean Nox ◽  
Effects Of Aging

The Effects of Aging Temperature and PGM Loading on the NOx Storage Capacity of a Lean NOx Trap

2005 ◽  
Author(s):  
Joseph R. Theis ◽  
Justin A. Ura ◽  
Christian T. Goralski ◽  
Jon Caine ◽  
Marcus Davies ◽  
...  
Keyword(s):  
Aging Temperature ◽  
Storage Capacity ◽  
Nox Storage ◽  
Lean Nox Trap ◽  
Nox Trap ◽  
Nox Storage Capacity ◽  
Lean Nox ◽  
Effects Of Aging

scholarly journals Improved NOx Storage/Release Properties of Ceria-Based Lean NOx Trap Compositions with MnOx Modification

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2127 ◽  
Author(s):  
Marcos Schöneborn ◽  
Thomas Harmening ◽  
Javier Giménez-Mañogil ◽  
Juan Carlos Martínez-Munuera ◽  
Avelina García-García
Keyword(s):  
Storage Capacity ◽  
Nox Storage ◽  
Pt Catalyst ◽  
Lean Nox Trap ◽  
Incipient Wetness Impregnation ◽  
Nox Trap ◽  
Remarkable Effect ◽  
Nox Storage Capacity ◽  
Nox Adsorption ◽  
Lean Nox

Ceria/spinel-based lean NOx trap compositions with and without barium were modified with MnOx via incipient wetness impregnation. The effect of the MnOx layer on the aged materials (850 °C) as to the NOx storage and release properties was investigated via NOx adsorption (500 ppm NO/5% O2/balance N2) carried out at 300 °C in a dual-bed with a 1% Pt/Al2O3 catalyst placed upstream of the samples to generate sufficient amounts of NO2 required for efficient NOx storage. Subsequent temperature programmed desorption (TPD) experiments were carried out under N2 from 300 °C to 700 °C. The addition of MnOx to the barium free composition led to a slightly reduced NOx storage capacity but all of the ad-NOx species were released from this material at significantly lower temperatures (ΔT ≈ 100 °C). The formation of a MnOx layer between ceria/spinel and barium had a remarkable effect on ageing stability as the formation of BaAl2O4 was suppressed in favour of BaMnO3. The presence of this phase resulted in an increased NOx storage capacity and lower desorption temperatures. Furthermore, NOx adsorption experiments carried out in absence of the Pt-catalyst also revealed an unexpected high NOx storage ability at low NO2/NO ratios, which could make this composition suitable for various lean NOx trap catalysts (LNT) related applications.

NOX storage and reduction over a perovskite-based lean NOX trap catalyst

2013 ◽  
Vol 134-135 ◽  
pp. 66-74 ◽  
Author(s):  
Crystle Constantinou ◽  
Wei Li ◽  
Gongshin Qi ◽  
William S. Epling
Keyword(s):  
Nox Storage ◽  
Lean Nox Trap ◽  
Nox Trap ◽  
Nox Storage And Reduction ◽  
Lean Nox

NOx storage–reduction characteristics of Ba-based lean NOx trap catalysts subjected to simulated road aging

2010 ◽  
Vol 151 (3-4) ◽  
pp. 362-375 ◽  
Author(s):  
Yaying Ji ◽  
Courtney Fisk ◽  
Vencon Easterling ◽  
Uschi Graham ◽  
Adam Poole ◽  
...  
Keyword(s):  
Nox Storage ◽  
Lean Nox Trap ◽  
Nox Trap ◽  
Nox Storage Reduction ◽  
Lean Nox ◽  
Reduction Characteristics

Effect of lean/rich high temperature aging on NO oxidation and NOx storage/release of a fully formulated lean NOx trap

2011 ◽  
Vol 101 (3-4) ◽  
pp. 486-494 ◽  
Author(s):  
Nathan A. Ottinger ◽  
Todd J. Toops ◽  
Ke Nguyen ◽  
Bruce G. Bunting ◽  
Jane Howe
Keyword(s):  
High Temperature ◽  
No Oxidation ◽  
Nox Storage ◽  
Lean Nox Trap ◽  
Nox Trap ◽  
Lean Nox ◽  
High Temperature Aging ◽  
Temperature Aging
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