Modelling of a combined NOx storage and NH3-SCR catalytic system for Diesel exhaust gas aftertreatment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F10%3A00023480" target="_blank" >RIV/60461373:22340/10:00023480 - 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 a combined NOx storage and NH3-SCR catalytic system for Diesel exhaust gas aftertreatment

Popis výsledku v původním jazyce

A combined Diesel exhaust gas aftertreatment system is studied, consisting of the NOx storage and reduction catalyst (NSRC, called also lean NOx trap, LNT) and the catalyst for selective catalytic reduction of NOx by NH3 (NH3-SCR). Most of the time the system is operated under prevailing fuel-lean conditions, enabling economical running of the engine. During this phase the NOx emissions are being adsorbed in the NSRC. However, short fuel enrichments need to be applied periodically for the NSRC regeneration (reduction of the stored NOx). Ammonia produced in the NSRC as a by-product of the NOx reduction under controlled fuel-rich conditions is then adsorbed in the NH3-SCR reactor located downstream. The adsorbed NH3 is consequently utilised in selectiveNOx reduction during the next fuel-lean period. The NSRC+SCR configuration thus eliminates the need for an external NH3 source (e.g., periodically re-filled urea solution tank) that is necessary in the case of the stand-alone SCR. Develop

Název v anglickém jazyce

Modelling of a combined NOx storage and NH3-SCR catalytic system for Diesel exhaust gas aftertreatment

Popis výsledku anglicky

A combined Diesel exhaust gas aftertreatment system is studied, consisting of the NOx storage and reduction catalyst (NSRC, called also lean NOx trap, LNT) and the catalyst for selective catalytic reduction of NOx by NH3 (NH3-SCR). Most of the time the system is operated under prevailing fuel-lean conditions, enabling economical running of the engine. During this phase the NOx emissions are being adsorbed in the NSRC. However, short fuel enrichments need to be applied periodically for the NSRC regeneration (reduction of the stored NOx). Ammonia produced in the NSRC as a by-product of the NOx reduction under controlled fuel-rich conditions is then adsorbed in the NH3-SCR reactor located downstream. The adsorbed NH3 is consequently utilised in selectiveNOx reduction during the next fuel-lean period. The NSRC+SCR configuration thus eliminates the need for an external NH3 source (e.g., periodically re-filled urea solution tank) that is necessary in the case of the stand-alone SCR. Develop

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

Catalysis Today

ISSN

0920-5861

e-ISSN

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Svazek periodika

151

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

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Kód UT WoS článku

000279375300024

EID výsledku v databázi Scopus

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