Internal diffusion effects in Nox storage catalytic monolith converters for automobile exhaust gases

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F02%3A00007019" target="_blank" >RIV/60461373:22340/02:00007019 - 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

Internal diffusion effects in Nox storage catalytic monolith converters for automobile exhaust gases

Popis výsledku v původním jazyce

The periodically operated NOx storage and reduction (NSR) catalytic converters are becoming promising and commercially employed solution to the emissions of nitrogen oxides from economical lean burn gasoline engines. Multiphase mathematical model of thecatalytic monolithic reactor has been developed to study the effects of internal transport in the porous catalyst. It includes mass transport from the bulk gas to the pores of the washcoat and diffusion and reactions in the porous structures. The non-stationary operation of the NSR converter is simulated and transport limitations are discussed for both phases of operation, i.e. in the course of lean period, when NOx are stored on the surface under the excess of oxygen, and in the short rich phase, whenthe stored NOx are reduced by the components resulting from the rich fuel injection (e.g. CO). The influence of washcoat thickness on the NOx conversion is investigated.

Název v anglickém jazyce

Internal diffusion effects in Nox storage catalytic monolith converters for automobile exhaust gases

Popis výsledku anglicky

The periodically operated NOx storage and reduction (NSR) catalytic converters are becoming promising and commercially employed solution to the emissions of nitrogen oxides from economical lean burn gasoline engines. Multiphase mathematical model of thecatalytic monolithic reactor has been developed to study the effects of internal transport in the porous catalyst. It includes mass transport from the bulk gas to the pores of the washcoat and diffusion and reactions in the porous structures. The non-stationary operation of the NSR converter is simulated and transport limitations are discussed for both phases of operation, i.e. in the course of lean period, when NOx are stored on the surface under the excess of oxygen, and in the short rich phase, whenthe stored NOx are reduced by the components resulting from the rich fuel injection (e.g. CO). The influence of washcoat thickness on the NOx conversion is investigated.

Druh

D - Stať ve sborníku

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

2002

Kód důvěrnosti údajů

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

Název statě ve sborníku

29th Int. Conf. of Slovak Soc. of Chem. Engng, Tatranské Matliare 27.- 31. 5. 2002, CD-ROM

ISBN

80-227-1690-1

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

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Název nakladatele

Slovak University of Technology

Místo vydání

Bratislava

Místo konání akce

27.5. -31.5. 2002, Tatranské Matliare, SR

Datum konání akce

27. 5. 2002

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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