The effect of sulfur dioxide on the activity of hierarchical Pd-based catalysts in methane combustion
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10371119" target="_blank" >RIV/00216208:11320/17:10371119 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.apcatb.2016.09.016" target="_blank" >http://dx.doi.org/10.1016/j.apcatb.2016.09.016</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apcatb.2016.09.016" target="_blank" >10.1016/j.apcatb.2016.09.016</a>
Alternative languages
Result language
angličtina
Original language name
The effect of sulfur dioxide on the activity of hierarchical Pd-based catalysts in methane combustion
Original language description
SO2 poisoning of methane oxidation over alumina-supported, Pd@CexZr1-xO2 nanoparticle catalysts was systematically studied by means of advanced PhotoElectron Spectroscopy (PES) methods. The Pd@CexZr1-xO2 units were synthesized and deposited on two modified-alumina supports, i.e. high surface area modified alumina and a model alumina prepared by Atomic Layer Deposition (ALD) of alumina on Indium Tin Oxide (ITO)/quartz slides. The model support was designed to be suitable for PES analysis and was stable to high temperature treatments (850 degrees C). Characterization of the high-surface-area (HSA) catalysts by X-Ray Diffraction (XRD), N-2 physisorption, CO chemisorption and Transmission Electron Microscopy (TEM) indicated formation of CeO2-ZrO2 (CZ) mixed-oxide crystallites that stabilize the Pd active phase against sintering. Correlation of methane-oxidation rates with PES results demonstrated two distinct mechanisms for deactivation by SO2. Below 450 degrees C, the presence of SO2 in the feed led to partial reduction of the active PdO phase and to the formation of sulfates on the Pd. Above 500 degrees C, poisoning by SO2 was less severe due to spillover of the sulfates onto the oxide promoter. Pd@ZrO2 catalysts showed the best resistance to SO2 poisoning, outperforming analogous Pd@CZ mixed-oxide catalysts, because there was less sulfate formation and the sulfates that did form could be removed during regeneration.
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
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Catalysis B: Environmental
ISSN
0926-3373
e-ISSN
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Volume of the periodical
202
Issue of the periodical within the volume
Březen
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
72-83
UT code for WoS article
000388052100008
EID of the result in the Scopus database
2-s2.0-84989901315