Spatiotemporal distribution of NOx storage and impact on NH3 and N2O selectivities during lean/rich cycling of a Ba-based lean NOx trap catalyst
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F12%3A43893739" target="_blank" >RIV/60461373:22340/12:43893739 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0920586111007826" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0920586111007826</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cattod.2011.11.007" target="_blank" >10.1016/j.cattod.2011.11.007</a>
Alternative languages
Result language
angličtina
Original language name
Spatiotemporal distribution of NOx storage and impact on NH3 and N2O selectivities during lean/rich cycling of a Ba-based lean NOx trap catalyst
Original language description
We summarize results from an investigation of the spatiotemporal distribution of NOx storage and intermediate gas species in determining the performance of a fully formulated, Ba-based, lean NOx trap catalyst under lean/rich cycling conditions. By experimentally resolving spatiotemporal profiles of gas composition, we found that stored NOx was significantly redistributed along the monolith axis during the rich phase of the cycle by release and subsequent downstream re-adsorption. Sulfur poisoning of upstream NOx storage sites caused the active NOx-storage zone to be displaced downstream. This axial displacement in turn influenced rich-phase NOx release and re-adsorption. As sulfur poisoning increased, NH3 slip at the catalyst exit also increased due toits formation closer to the catalyst outlet and decreased exposure to downstream oxidation by surface oxygen. N2O formation was found to be associated with nitrate reduction rather than oxidation of NH3 by stored oxygen. We propose that
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CI - Industrial chemistry and chemical engineering
OECD FORD branch
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Result continuities
Project
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Continuities
N - Vyzkumna aktivita podporovana z neverejnych zdroju
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Catalysis Today
ISSN
0920-5861
e-ISSN
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Volume of the periodical
184
Issue of the periodical within the volume
1
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
7
Pages from-to
20-26
UT code for WoS article
000303108100004
EID of the result in the Scopus database
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