New insights on N2O formation pathways during lean/rich cycling of a commercial lean NOx trap catalyst
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
New insights on N2O formation pathways during lean/rich cycling of a commercial lean NOx trap catalyst
Popis výsledku v původním jazyce
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
Název v anglickém jazyce
New insights on N2O formation pathways during lean/rich cycling of a commercial lean NOx trap catalyst
Popis výsledku anglicky
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
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CI - Průmyslová chemie a chemické inženýrství
OECD FORD obor
—
Návaznosti výsledku
Projekt
<a href="/cs/project/LH12086" target="_blank" >LH12086: Analýza, modelování a řízení časoprostorových koncentračních profilů v katalyzátorech pro redukci oxidů dusíku (deNOx) v automobilových výfukových plynech</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2014
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Catalysis Today
ISSN
0920-5861
e-ISSN
—
Svazek periodika
231
Číslo periodika v rámci svazku
NEUVEDEN
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
10
Strana od-do
145-154
Kód UT WoS článku
000324296400022
EID výsledku v databázi Scopus
—