Modelling of NOx storage + SCR exhaust gas aftertreatment system with internal generation of ammonia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F10%3A00023485" target="_blank" >RIV/60461373:22340/10:00023485 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Modelling of NOx storage + SCR exhaust gas aftertreatment system with internal generation of ammonia

Popis výsledku v původním jazyce

Combination of an NOx storage and reduction catalyst (NSRC, called also lean NOx trap, LNT) and a catalyst for the selective catalytic reduction of NOx by NH3 (NH3-SCR) offers a potential to significantly increase the efficiency of NSRC-based exhaust gasaftertreatment systems. Under most situations the SCR catalyst is able to adsorb the NH3 peaks generated in the NSRC during the regeneration and utilise it for additional NOx reduction in the course of the consequent lean phase. This synergy becomes more important with the aged NSRC, where generally lower NOx conversions and higher NH3 yields in wider range of operating temperatures are observed (in comparison with the fresh or de-greened NSRC). In this paper we present global kinetic models for the NSRC (Pt/Ba/Ce/?-Al2O3 catalyst type) and NH3-SCR (Fe-ZSM5 catalyst type). The NSRC regeneration by a mixture of CO, H2 and HC is considered with a differentiated activity and selectivity of individual reducing agents in the NOx reduction.

Název v anglickém jazyce

Modelling of NOx storage + SCR exhaust gas aftertreatment system with internal generation of ammonia

Popis výsledku anglicky

Combination of an NOx storage and reduction catalyst (NSRC, called also lean NOx trap, LNT) and a catalyst for the selective catalytic reduction of NOx by NH3 (NH3-SCR) offers a potential to significantly increase the efficiency of NSRC-based exhaust gasaftertreatment systems. Under most situations the SCR catalyst is able to adsorb the NH3 peaks generated in the NSRC during the regeneration and utilise it for additional NOx reduction in the course of the consequent lean phase. This synergy becomes more important with the aged NSRC, where generally lower NOx conversions and higher NH3 yields in wider range of operating temperatures are observed (in comparison with the fresh or de-greened NSRC). In this paper we present global kinetic models for the NSRC (Pt/Ba/Ce/?-Al2O3 catalyst type) and NH3-SCR (Fe-ZSM5 catalyst type). The NSRC regeneration by a mixture of CO, H2 and HC is considered with a differentiated activity and selectivity of individual reducing agents in the NOx reduction.

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

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

SAE International Journal of Fuels and Lubricants

ISSN

1946-3952

e-ISSN

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Svazek periodika

3

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

23

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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