New insights on N2O formation pathways during lean/rich cycling of a commercial lean NOx trap catalyst

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F14%3A43897882" target="_blank" >RIV/60461373:22340/14:43897882 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.cattod.2013.11.050" target="_blank" >http://dx.doi.org/10.1016/j.cattod.2013.11.050</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cattod.2013.11.050" target="_blank" >10.1016/j.cattod.2013.11.050</a>

Result language
angličtina
Original language name
New insights on N2O formation pathways during lean/rich cycling of a commercial lean NOx trap catalyst
Original language description
Pathways for N2O formation during lean/rich cycling of a commercial LNT catalyst (containing Pt, Pd, Rh as well as Ba, CeZr, MgAl and Al oxides) were investigated based on bench-reactor experiments with spatiotemporally resolved gas measurements (SpaciMS) and in situ surface analysis (DRIFTS). The inlet gas temperature, composition of the rich gas mixture and regeneration length were varied in order to reveal the underlying mechanisms. Particular attention was given to low temperatures where the regeneration was kinetically limited and N2O was emitted in two peaks. The primary N2O peak appeared immediately after rich-phase inception when platinum-group-metal (PGM) sites over which NOx reduction took place were only partially reduced, and tailed off with the breakthrough of the reductant front. The secondary N2O peak appeared at the rich-to-lean transition as a result of reactions between surface-deposited reductive species (NH3, CO and/or isocyanates) and residual stored NOx. Therefore
Czech name
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Czech description
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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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Project
<a href="/en/project/LH12086" target="_blank" >LH12086: Analysis, Modeling and Control of Spatiotemporal Concentration Patterns in Nitrogen Oxide Reduction (deNOx) Catalysts for Automotive Exhaust Gas Aftertreatment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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