Dynamics of N2 and N2O Peaks During and After the Regeneration of Lean NOx Trap

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F15%3A43900071" target="_blank" >RIV/60461373:22340/15:43900071 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0926337314007747" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0926337314007747</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcatb.2014.12.002" target="_blank" >10.1016/j.apcatb.2014.12.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dynamics of N2 and N2O Peaks During and After the Regeneration of Lean NOx Trap

Popis výsledku v původním jazyce

The dynamics and selectivity of N2 and N2O formation during and after the regeneration of a commercial NOx storage catalyst containing Pt, Pd, Rh, Ba on Ce/Zr, Mg/Al and Al oxides was studied with high-speed FTIR and SpaciMS analyzers. The lean/rich cycling experiments (60 s/5 s and 60 s/3 s) were performed in the temperature range 200-400 oC, using H2, CO, and C3H6 individually for the reduction of adsorbed NOx. Isotopically labeled 15NO was employed in combination with Ar carrier gas in order to quantify the N2 product by mass spectrometry. N2 and N2O products were formed concurrently. The primary peaks appeared immediately after the rich-phase inception, and tailed off with breakthrough of the reductant front (accompanied by NH3 product). SecondaryN2 and N2O peaks appeared at the rich-to-lean transition as a result of reactions between surface-deposited reductants/intermediates (CO, HC, NH3, -NCO) and residual stored NOx. At 200-300 oC, up to 30% of N2 and 50% of N2O products origi

Název v anglickém jazyce

Dynamics of N2 and N2O Peaks During and After the Regeneration of Lean NOx Trap

Popis výsledku anglicky

The dynamics and selectivity of N2 and N2O formation during and after the regeneration of a commercial NOx storage catalyst containing Pt, Pd, Rh, Ba on Ce/Zr, Mg/Al and Al oxides was studied with high-speed FTIR and SpaciMS analyzers. The lean/rich cycling experiments (60 s/5 s and 60 s/3 s) were performed in the temperature range 200-400 oC, using H2, CO, and C3H6 individually for the reduction of adsorbed NOx. Isotopically labeled 15NO was employed in combination with Ar carrier gas in order to quantify the N2 product by mass spectrometry. N2 and N2O products were formed concurrently. The primary peaks appeared immediately after the rich-phase inception, and tailed off with breakthrough of the reductant front (accompanied by NH3 product). SecondaryN2 and N2O peaks appeared at the rich-to-lean transition as a result of reactions between surface-deposited reductants/intermediates (CO, HC, NH3, -NCO) and residual stored NOx. At 200-300 oC, up to 30% of N2 and 50% of N2O products origi

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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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

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Catalysis B:Environment

ISSN

0926-3373

e-ISSN

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Svazek periodika

166-167

Číslo periodika v rámci svazku

neuveden

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

9

Strana od-do

509-517

Kód UT WoS článku

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EID výsledku v databázi Scopus

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