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      NaCl-promoted CuO–RuO2/SiO2 catalysts for propylene epoxidation with O2 at atmospheric pressures: a combinatorial micro-reactor study

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      Author
      Kalyoncu, Ş.
      Düzenli, D.
      Onal, I.
      Seubsai, A.
      Noon, D.
      Senkan, S.
      Say, Z.
      Vovk, E. I.
      Ozensoy, E.
      Date
      2015
      Source Title
      Catalysis Letters
      Print ISSN
      1011-372X
      Electronic ISSN
      1572-879X
      Publisher
      Springer
      Volume
      145
      Issue
      2
      Pages
      596 - 605
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      A combinatorial approach is used to investigate several alkali metals promoted Cu–Ru binary oxide catalysts with improved catalytic performance in the propylene partial oxidation. 2 %Cu/5 %Ru/c–SiO2 catalyst had the best yield with high propylene conversion and propylene oxide (PO) selectivity. Among the promoters screening in the study, NaCl promotion significantly increased the PO selectivity accompanied by some attenuation in the total propylene conversion. It was proposed that binary oxide catalysts revealed a greater number of exposed catalytically active adsorption sites as compared to monometallic oxide counterparts according to XPS and FTIR results. Besides NaCl addition alters the structure, yielding a significantly improved PO selectivity without any change in the particle size of Cu and Ru oxide according to XRD analysis.
      Keywords
      Cu
      Epoxidation
      Propylene
      Ru
      SiO2
      Permalink
      http://hdl.handle.net/11693/22514
      Published Version (Please cite this version)
      http://dx.doi.org/10.1007/s10562-014-1454-7
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