Comparison of dual CO light-off effect on Pt/CeO2/gamma-Al2O3, Pd/CeO2/gamma-Al2O3, Pt/gamma-Al2O3 and Pd/gamma-Al2O3 in the presence of C3H6

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F20%3A43921254" target="_blank" >RIV/60461373:22340/20:43921254 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.ces.2020.115542" target="_blank" >https://doi.org/10.1016/j.ces.2020.115542</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ces.2020.115542" target="_blank" >10.1016/j.ces.2020.115542</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of dual CO light-off effect on Pt/CeO2/gamma-Al2O3, Pd/CeO2/gamma-Al2O3, Pt/gamma-Al2O3 and Pd/gamma-Al2O3 in the presence of C3H6

Popis výsledku v původním jazyce

Dual CO light-off may occur during simultaneous oxidation of CO and hydrocarbon on three-way catalysts (TWC) and diesel oxidation catalysts (DOC). A plateau, shoulder or secondary peak may occur on the CO light-off curve after a cold start. In this paper we present a comparative experimental study of this effect on Pt/CeO2/gamma-Al2O3, Pd/CeO2/gamma-Al2O3, Pt/gamma-Al2O3 and Pd/gamma-Al2O3 catalysts, focusing particularly on the role of CeO2 in the catalyst formulation. Two mechanisms for dual CO light-off are identified: (i) blocking of active sites by the hydrocarbon oxidation intermediates, and (ii) CO by-production during the hydrocarbon oxidation. The presence of CeO2 does not suppress the accumulation of C3H6 oxidation intermediates on the catalyst surface. Longer transients and more complex patterns are observed on Pt/CeO2/gamma-Al2O3, Pd/CeO2/gamma-Al2O3 when compared to the corresponding ceria-free catalyst formulations. On the other hand, the presence of CeO2 decreases the light-off temperature and minimizes CO formation during C3H6 oxidation. (C) 2020 Elsevier Ltd. All rights reserved.

Název v anglickém jazyce

Comparison of dual CO light-off effect on Pt/CeO2/gamma-Al2O3, Pd/CeO2/gamma-Al2O3, Pt/gamma-Al2O3 and Pd/gamma-Al2O3 in the presence of C3H6

Popis výsledku anglicky

Dual CO light-off may occur during simultaneous oxidation of CO and hydrocarbon on three-way catalysts (TWC) and diesel oxidation catalysts (DOC). A plateau, shoulder or secondary peak may occur on the CO light-off curve after a cold start. In this paper we present a comparative experimental study of this effect on Pt/CeO2/gamma-Al2O3, Pd/CeO2/gamma-Al2O3, Pt/gamma-Al2O3 and Pd/gamma-Al2O3 catalysts, focusing particularly on the role of CeO2 in the catalyst formulation. Two mechanisms for dual CO light-off are identified: (i) blocking of active sites by the hydrocarbon oxidation intermediates, and (ii) CO by-production during the hydrocarbon oxidation. The presence of CeO2 does not suppress the accumulation of C3H6 oxidation intermediates on the catalyst surface. Longer transients and more complex patterns are observed on Pt/CeO2/gamma-Al2O3, Pd/CeO2/gamma-Al2O3 when compared to the corresponding ceria-free catalyst formulations. On the other hand, the presence of CeO2 decreases the light-off temperature and minimizes CO formation during C3H6 oxidation. (C) 2020 Elsevier Ltd. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

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

2020

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

218

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

115542

Kód UT WoS článku

000527342600006

EID výsledku v databázi Scopus

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