Dynamics of Two-Step CO Oxidation Light-Off on Pt/-Al2O3 and Pd/-Al2O3 in the Presence of C3H6
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F19%3A43919369" target="_blank" >RIV/60461373:22340/19:43919369 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs11244-018-1129-5" target="_blank" >https://link.springer.com/article/10.1007%2Fs11244-018-1129-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11244-018-1129-5" target="_blank" >10.1007/s11244-018-1129-5</a>
Alternative languages
Result language
angličtina
Original language name
Dynamics of Two-Step CO Oxidation Light-Off on Pt/-Al2O3 and Pd/-Al2O3 in the Presence of C3H6
Original language description
Although the kinetics of CO and hydrocarbon (HC) oxidation reactions on three-way catalyst and diesel oxidation catalysts for automotive exhaust gas aftertreatment has been studied for a couple of decades, there are still some phenomena affecting the catalyst performance and pollutant conversion that need to be better understood and controlled. Two-step CO light-off is an undesired effect that significantly delays the process of reaching full CO conversion in the exhaust gas mixture including also hydrocarbons. In such a case CO light-off curve exhibits a plateau or shoulder where the CO conversion does not increase or even temporarily decreases with temperature, though there is enough O2 available for both CO and HC oxidation. The onset of hydrocarbon oxidation may inhibit the CO conversion due to blocking of active catalytic sites by adsorbed reaction intermediates. Furthermore, CO can be released as a by-product of the hydrocarbon oxidation. In this contribution we present the results of a systematic experimental study exploring these phenomena on Pt/-Al2O3 and Pd/-Al2O3 catalysts. Pt/-Al2O3 showed larger decrease of CO conversion caused by accumulation of the surface intermediates. On the contrary, the production of CO by incomplete C3H6 oxidation was higher on Pd/-Al2O3. Overall extent of the two-step CO light-off effect was higher on Pt/-Al2O3.
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
20401 - Chemical engineering (plants, products)
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
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Topics in Catalysis
ISSN
1022-5528
e-ISSN
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Volume of the periodical
62
Issue of the periodical within the volume
1-4
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
252-258
UT code for WoS article
000461821000032
EID of the result in the Scopus database
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