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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
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
Original language description
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.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20402 - Chemical process engineering

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)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)