Ethanol Selective Oxidation into Syngas over Pt-Promoted Fluorite-Like Oxide: SSITKA and Pulse Microcalorimetry Study
Conference attendances
| Language |
Английский |
| Participant type |
Oral |
| Conference |
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources”
30 Aug - 4 Sep 2015
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ConferenceType.INTERNATIONAL_CONGRESS, Казань
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| Authors |
Simonov Mikhail Nikolaevich
1,2
, Sadykov Vladislav Aleksandrovich
1,2
, Rogov Vladimir Alekseevich
1,2
, Bobin Alexey Sergeyevich
1,2
, Sadovskaya Ekaterina Mikhajlovna
1,2
, Mezentseva Natalia Vasilievna
1,2
, Roger Anne-Cecile
3
, van Veen Andre C.
4
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| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS
|
| 2 |
Novosibirsk State University
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| 3 |
University of Strasbourg
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| 4 |
University of Warwick
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|
Catalysts based on oxides with a high lattice oxygen mobility and reactivity are known to be able to efficiently transform ethanol into syngas by selective oxidation. Mechanism of this reaction over Pt/ Pr0.15Sm0.15Ce0.35Zr0.35O2 catalyst was studied by using SSITKA and pulse microcalorimetry. The rate–determining step is C-C bond rupture in ethanol/acetaldehyde molecules, while C-H bond breaking in the ethanol dehydrogenation step proceeds easily. The mechanism is described by step-wise red–ox scheme including ethanol oxidative decomposition on Pt sites with participation of bridging oxygen species (with the heat of adsorption ~ 550 kJ/mol O2) located at Pt-oxide interface followed by fast reoxidation of reduced support sites by O2. Rapid oxygen migration from oxide sites to Pt provides conjugation between these steps, thus suppressing coking