Simulation of diesel exhaust aftertreatment system DOC-pipe-SCR: The effects of Pt loading, PtOx formation and pipe configuration on the deNO(x) performance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F18%3A43916522" target="_blank" >RIV/60461373:22340/18:43916522 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0009250918303282?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0009250918303282?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ces.2018.05.031" target="_blank" >10.1016/j.ces.2018.05.031</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Simulation of diesel exhaust aftertreatment system DOC-pipe-SCR: The effects of Pt loading, PtOx formation and pipe configuration on the deNO(x) performance

Popis výsledku v původním jazyce

A combined exhaust aftertreatment system consisting of a diesel oxidation catalyst (DOC), pipe and selective catalytic reduction of nitrogen oxides (SCR) is studied in this paper by the means of mathematical modeling and simulations. Pt/gamma-Al2O3 DOC and V2O5-WO3/TiO2 SCR catalysts for heavy-duty Diesel engines are examined. First, spatially 1D models of the DOC, SCR and pipe are introduced and calibrated using the measured engine test data. The models are then employed in a simulation study of the effects of Pt loading, PtOx formation and pipe configuration on the NO2 yield in DOC and the resulting deNO(x) performance of the SCR in the driving cycles ETC and WHTC. It is shown that there exists optimum washcoat loading in the DOC with respect to NOx conversion in SCR and that the minimization of heat losses in the connecting pipe can further improve the NOx conversion. Finally, the decrease of NO oxidation activity in DOC due to PtOx formation and its impact on NOx conversion in SCR is quantified over the repeated driving cycles, showing 2-10% difference between the deNO(x) performance with the pre-reduced DOC and after few hours of operation under oxidizing conditions. Based on the simulation results, an improved configuration of the system is proposed that achieves up to 6% higher overall NOx conversion. (C) 2018 Elsevier Ltd. All rights reserved.

Název v anglickém jazyce

Simulation of diesel exhaust aftertreatment system DOC-pipe-SCR: The effects of Pt loading, PtOx formation and pipe configuration on the deNO(x) performance

Popis výsledku anglicky

A combined exhaust aftertreatment system consisting of a diesel oxidation catalyst (DOC), pipe and selective catalytic reduction of nitrogen oxides (SCR) is studied in this paper by the means of mathematical modeling and simulations. Pt/gamma-Al2O3 DOC and V2O5-WO3/TiO2 SCR catalysts for heavy-duty Diesel engines are examined. First, spatially 1D models of the DOC, SCR and pipe are introduced and calibrated using the measured engine test data. The models are then employed in a simulation study of the effects of Pt loading, PtOx formation and pipe configuration on the NO2 yield in DOC and the resulting deNO(x) performance of the SCR in the driving cycles ETC and WHTC. It is shown that there exists optimum washcoat loading in the DOC with respect to NOx conversion in SCR and that the minimization of heat losses in the connecting pipe can further improve the NOx conversion. Finally, the decrease of NO oxidation activity in DOC due to PtOx formation and its impact on NOx conversion in SCR is quantified over the repeated driving cycles, showing 2-10% difference between the deNO(x) performance with the pre-reduced DOC and after few hours of operation under oxidizing conditions. Based on the simulation results, an improved configuration of the system is proposed that achieves up to 6% higher overall NOx conversion. (C) 2018 Elsevier Ltd. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/GA17-26018S" target="_blank" >GA17-26018S: Reakční kinetika v oxidačních katalyzátorech pro konverzi dieselových výfukových plynů za nízkých teplot</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Science

ISSN

0009-2509

e-ISSN

—

Svazek periodika

189

Číslo periodika v rámci svazku

neuvedeno

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

179-190

Kód UT WoS článku

000437974700015

EID výsledku v databázi Scopus

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