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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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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.

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Acknowledgments

This research was supported in part by TÜBİTAK through MAG Project No: 108T378. High throughput testing facilities at UCLA were provided by Prof. Selim Senkan. E.O. acknowledges support from Turkish Academy of Sciences (TUBA) through the “Outstanding Young Investigator” Grant. E.V. acknowledges RFBR (Russia) #12-03-91373-CT_a, for financial support.

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Authors and Affiliations

  1. Department of Chemical Engineering, Middle East Technical University, Ankara, 06800, Turkey

    Şule Kalyoncu, Derya Düzenli & Isik Onal

  2. Department of Chemical Engineering, Kasetsart University, Bangkok, 10900, Thailand

    Anusorn Seubsai

  3. Department of Chemical and Biomolecular Engineering, UCLA, Los Angeles, CA, 90095-1592, USA

    Daniel Noon & Selim Senkan

  4. Department of Chemistry, Bilkent University, Ankara, 06800, Turkey

    Zafer Say, Evgeny I. Vovk & Emrah Ozensoy

  5. Boreskov Institute of Catalysis, Novosibirsk, 630090, Russian Federation

    Evgeny I. Vovk

Authors
  1. Şule Kalyoncu
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  2. Derya Düzenli
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  4. Anusorn Seubsai
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  5. Daniel Noon
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  6. Selim Senkan
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  9. Emrah Ozensoy
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Correspondence to Isik Onal.

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Kalyoncu, Ş., Düzenli, D., Onal, I. et al. NaCl-Promoted CuO–RuO2/SiO2 Catalysts for Propylene Epoxidation with O2 at Atmospheric Pressures: A Combinatorial Micro-reactor Study. Catal Lett 145, 596–605 (2015). https://doi.org/10.1007/s10562-014-1454-7

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  • DOI: https://doi.org/10.1007/s10562-014-1454-7

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