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  Comparison of oxidizing agents for the oxidative coupling of methane over state-of-the-art catalysts

Langfeld, K., Frank, B., Strempel, V. A., Berger-Karin, C., Weinberg, G., Kondratenko, E. V., et al. (2012). Comparison of oxidizing agents for the oxidative coupling of methane over state-of-the-art catalysts. Applied Catalysis A: General, 417-418, 145-152. doi:10.1016/j.apcata.2011.12.035.

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2011
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 Creators:
Langfeld, Kirsten1, Author
Frank, Benjamin2, Author           
Strempel, Verena A.1, Author
Berger-Karin, Claudia3, Author
Weinberg, Gisela2, Author           
Kondratenko, Evgenii V.3, Author
Schomäcker, Reinhard1, Author
Affiliations:
1Institute of Chemistry, Technical University Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany, ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
3Leibniz Institute for Catalysis at the University of Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany, ou_persistent22              

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Free keywords: C–H activation; Oxygen; Nitrous oxide; Cellulose templating; Deactivation
 Abstract: The synthesis of selected state-of-the-art catalysts providing high performances in the oxidative coupling of methane (OCM) with O2 was reproduced according to the respective recipes reported in literature. A reference material with identical stoichiometric composition was further synthesized by applying the cellulose templating method. This method increases the surface area and affects the phase composition and crystallite size of the catalysts as determined by N2-physisoprtion, X-ray diffraction and scanning electron microscopy. This, however, is in most cases detrimental to the catalytic OCM performance due to enhanced global activity resulting in hot spots in the catalyst bed. Catalysts were tested in the OCM under variation of temperature (973–1073 K), GHSV (3600–100,000 h−1) and oxidizing agent (O2 and N2O). In general, conversions of CH4 when using N2O are lower than in the presence of O2, however, the selectivities to C2 products ethane and ethylene are higher even at a similar level of CH4 conversion. This confirms the presence of different oxygen species formed by activation of these oxidizing agents.

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Language(s): eng - English
 Dates: 2011-12-312012-02-29
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.apcata.2011.12.035
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Title: Applied Catalysis A: General
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 417-418 Sequence Number: - Start / End Page: 145 - 152 Identifier: ISSN: 0926-860X
CoNE: https://pure.mpg.de/cone/journals/resource/954925567761_1