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  Calorimetric Study of Propane and Ethylbenzene on Active Surface on Carbon-Based Catalysts

Wrabetz, S., Frank, B., Blume, R., Khavryuchenko, O., Zhang, J., Trunschke, A., et al. (2013). Calorimetric Study of Propane and Ethylbenzene on Active Surface on Carbon-Based Catalysts. Poster presented at XIth European Congress on Catalysis "20 years of European Catalysis and beyond", Lyon, France.

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EuropaCatLyon2013_Wrabetz etal _ExtendedAbstract_Final.pdf (Zusammenfassung), 372KB
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wrabetz_EuropaCatXI_Lyon2013_poster_final.pdf (beliebiger Volltext), 4MB
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 Urheber:
Wrabetz, Sabine1, Autor           
Frank, Benjamin1, Autor           
Blume, Raoul2, Autor           
Khavryuchenko, Oleksiy1, 3, Autor           
Zhang, J.4, Autor
Trunschke, Annette1, Autor           
Schlögl, Robert1, Autor           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Abt. Solarenergieforschung, Helmhotz-Zentrum Berlin, ou_persistent22              
3Chemical Dept., National Taras Shevchenko Uni. of Kiev, Kiev 01033, Ukraine, ou_persistent22              
4Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Zhejiang 315201 (China), ou_persistent22              

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Schlagwörter: Oxidative Dehydrogenation, Adsorption, Heat of Adsorption, propane, ethylbenzene
 Zusammenfassung: The use of carbon materials instead of (mixed) metal oxides in selective oxidation catalysis could emerge to be of basic interest for the catalysis community. Low dimensional carbon allotropes such as multiwalled carbon nanotubes (CNTs) with high structural homogeneity provide the characteristics of model catalysts with well defined active sites as compared with polyvalent transition metal oxides featuring complex electronic and spin structures. The oxydehydrogenation (ODH) reaction over carbon has been discovered in 1979 by Alkhazov et al.[1] From the mechanistic point of view, quinone groups are believed be the active site. These nucleophilic oxygen species can selectively abstract hydrogen atoms and the formed phenol groups are subsequently reoxidized by O2. We choose the ODH of propane and ethylbenzene (EB) as the model reactions. Propane is widely investigated as a substrate in this reaction and mechanistic models for the reaction sequence over metal oxide catalysts are nu-merously suggested. It is equipped with a high C–H bond strength (410.5 kJ mol-1). In contrary to the alkane, the weak C-H bond in benzylic position (357.3 kJ mol-1) makes the molecule highly reactive for ODH.

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Sprache(n): eng - English
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Veranstaltung

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Titel: XIth European Congress on Catalysis "20 years of European Catalysis and beyond"
Veranstaltungsort: Lyon, France
Start-/Enddatum: 2013-09-01 - 2013-09-06

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