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  Silica material variation for the MnxOy-Na2WO4/SiO2

Yildiz, M., Aksu, Y., Simon, U., Otremba, T., Kailasam, K., Göbel, C., et al. (2016). Silica material variation for the MnxOy-Na2WO4/SiO2. Applied Surface Science, 525, 168-179. doi:10.1016/j.apcata.2016.06.034.

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2016
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 Creators:
Yildiz, M.1, Author
Aksu, Yilmaz2, Author
Simon, U.3, Author
Otremba, Torsten1, Author
Kailasam, K.4, Author
Göbel, C.4, Author
Girgsdies, Frank5, Author           
Görke, O.3, Author
Rosowski, Frank6, Author
Thomas, A.4, Author
Schomäcker, Reinhard1, Author
Arndt, Sebastsian1, Author
Affiliations:
1Technische Universität Berlin, Institut für Chemie, Technische Chemie, Sekr. TC8, Straße des 17. Juni 124, 10623 Berlin, Germany, ou_persistent22              
2Technische Universität Berlin, Institut für Chemie, Metallorganische Chemie & Anorganische Materialien, Straße des 17. Juni 115, 10623 Berlin, Germany, ou_persistent22              
3Technische Universität Berlin, Institut für Werkstoffwissenschaften und -technologien, Fachgebiet Keramische Werkstoffe, Sekr. BA3, Hardenbergstraße40, 10623 Berlin, Germany, ou_persistent22              
4Technische Universität Berlin, Institut für Chemie, Funktionsmaterialen, Sekr. BA2, Hardenbergstraße 40, 10623 Berlin, Germany, ou_persistent22              
5Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
6BasCat UniCat BASF JointLab, Technische Universität Berlin, Sekretariat EW K 01, Hardenbergstraße 36, 10623 Berlin, Germany, ou_persistent22              

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 Abstract: The oxidative coupling of methane (OCM) is one of the best methods for the direct conversion of methane.Among the known OCM catalysts, MnxOy-Na2WO4/SiO2 is a promising candidate for an industrial appli-cation, showing a high methane conversion and C2 selectivity, with a good stability during long-termcatalytic activity tests. In the present study, some results have been already published and discussedbriefly in our previous short communication. However, we herein investigated comprehensively theinfluence of various silica support materials on the performance of the MnxOy-Na2WO4/SiO2 systemin the OCM by means of ex situ and in situ XRD, BET, SEM and TEM characterization methods andshowed new results to reveal possible support effects on the catalyst. The catalytic performance of most MnxOy-Na2WO4/SiO2 catalysts supported by different silica support materials did not differ substan-tially. However, the performance of the SBA-15 supported catalyst was outstanding and the methaneconversion was nearly twofold higher in comparison to the other silica supported catalysts at similar C2 selectivity as shown before in the communication. The reason of this substantial increase in performancecould be the ordered mesoporous structure of the SBA-15 support material, homogeneous dispersion ofactive components and high number of active sites responsible for the OCM.

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 Dates: 2016-01-112016-06-302016-07-012016-09-05
 Publication Status: Issued
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.apcata.2016.06.034
 Degree: -

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Title: Applied Surface Science
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B.V.
Pages: - Volume / Issue: 525 Sequence Number: - Start / End Page: 168 - 179 Identifier: ISSN: 0169-4332
CoNE: https://pure.mpg.de/cone/journals/resource/954928576736