Modeling of a combined exhaust aftertreatment system: DOC-pipe-NH3 -SCR

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Modeling of a combined exhaust aftertreatment system: DOC-pipe-NH3 -SCR

Popis výsledku v původním jazyce

This paper deals with the mathematical modeling of a combined exhaust gas aftertreatment system "DOC-pipe-SCR" and its variation "pipe-DOC-SCR", considering V2O5-WO3/TiO2 type of SCR catalyst for heavy-duty Diesel engines. The aim is to improve NOx conversion in the SCR catalyst over the driving cycle ETC by proper design of the oxidation catalyst (DOC), focusing on its size and location in the system. The effect of heat losses and arrangement of the connecting pipe is also examined. NOx conversion is evaluated during the European Transient Cycle for heavy-duty engines. In order to achieve maximum NOx conversion in SCR, it is desirable to keep NO2/NOx ratio close to 0.5 and temperature above 250 oC. The study reveals minor effect of DOC position within the system on the NOx conversion, but optimization of the DOC loading by Pt and the pipe insulation properties enhanced the NOx conversion by approximately 6%.

Název v anglickém jazyce

Modeling of a combined exhaust aftertreatment system: DOC-pipe-NH3 -SCR

Popis výsledku anglicky

This paper deals with the mathematical modeling of a combined exhaust gas aftertreatment system "DOC-pipe-SCR" and its variation "pipe-DOC-SCR", considering V2O5-WO3/TiO2 type of SCR catalyst for heavy-duty Diesel engines. The aim is to improve NOx conversion in the SCR catalyst over the driving cycle ETC by proper design of the oxidation catalyst (DOC), focusing on its size and location in the system. The effect of heat losses and arrangement of the connecting pipe is also examined. NOx conversion is evaluated during the European Transient Cycle for heavy-duty engines. In order to achieve maximum NOx conversion in SCR, it is desirable to keep NO2/NOx ratio close to 0.5 and temperature above 250 oC. The study reveals minor effect of DOC position within the system on the NOx conversion, but optimization of the DOC loading by Pt and the pipe insulation properties enhanced the NOx conversion by approximately 6%.

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

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings 43rd International Conference of the Slovak Society of Chemical Engineering

ISBN

978-80-89597-35-2

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

688-695

Název nakladatele

Slovak Society of Chemical Engineering

Místo vydání

Bratislava

Místo konání akce

Tatranské Matliare

Datum konání akce

23. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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