Modeling of varying Pt sites activity for NO oxidation in automotive exhaust gas catalysts

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 varying Pt sites activity for NO oxidation in automotive exhaust gas catalysts

Popis výsledku v původním jazyce

This study deals with modeling of reversible deactivation of a diesel oxidation catalyst (DOC) due to the platinum oxide (PtOx) formation. The deactivation effect is observed during the catalytic NO oxidation under lean conditions. The PtOx formation iscaused by O2 and NO2 present in the gas mixture. The catalytic NO oxidation during a sequential heat-up and cool-down experiments exhibits an inverse hysteresis. During isothermal NO oxidation, gradual decrease of the activity is observed directly and the steady state of PtOx formation is achieved only after several hours. Platinum oxide can be reduced by NO at low temperatures even in the oxidative atmosphere or thermally decomposed at temperatures above 350 oC. Within this study, it was found out thatPtOx can be reduced during NO oxidation also by CO C3H6 below their light-off temperature. The subject of this study was to extend standard global kinetic model of diesel oxidation catalyst by the reactions considering PtOx formation, re

Název v anglickém jazyce

Modeling of varying Pt sites activity for NO oxidation in automotive exhaust gas catalysts

Popis výsledku anglicky

This study deals with modeling of reversible deactivation of a diesel oxidation catalyst (DOC) due to the platinum oxide (PtOx) formation. The deactivation effect is observed during the catalytic NO oxidation under lean conditions. The PtOx formation iscaused by O2 and NO2 present in the gas mixture. The catalytic NO oxidation during a sequential heat-up and cool-down experiments exhibits an inverse hysteresis. During isothermal NO oxidation, gradual decrease of the activity is observed directly and the steady state of PtOx formation is achieved only after several hours. Platinum oxide can be reduced by NO at low temperatures even in the oxidative atmosphere or thermally decomposed at temperatures above 350 oC. Within this study, it was found out thatPtOx can be reduced during NO oxidation also by CO C3H6 below their light-off temperature. The subject of this study was to extend standard global kinetic model of diesel oxidation catalyst by the reactions considering PtOx formation, re

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

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of 42nd International Conference of Slovak Society of Chemical Engineering

ISBN

978-80-89475-14-8

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

626-632

Název nakladatele

J. Markoš, V. Štefuca

Místo vydání

Bratislava

Místo konání akce

Tatranské Matliare

Datum konání akce

25. 5. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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