Simulation of diesel exhaust aftertreatment system DOC-pipe-SCR: The effects of Pt loading, PtOx formation and pipe configuration on the deNO(x) performance
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Simulation of diesel exhaust aftertreatment system DOC-pipe-SCR: The effects of Pt loading, PtOx formation and pipe configuration on the deNO(x) performance
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20402 - Chemical process engineering
Result continuities
Project
<a href="/en/project/GA17-26018S" target="_blank" >GA17-26018S: Low temperature reaction kinetics in oxidation catalysts for diesel exhaust gas aftertreatment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemical Engineering Science
ISSN
0009-2509
e-ISSN
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Volume of the periodical
189
Issue of the periodical within the volume
neuvedeno
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
179-190
UT code for WoS article
000437974700015
EID of the result in the Scopus database
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