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Catalysis Letters

, Volume 143, Issue 9, pp 919–925 | Cite as

Effect of Nano-sized TiO2 Additional Support in WO3/SiO2 Catalyst Systems on Metathesis of Ethylene and Trans-2-Butene to Propylene

  • Wimonrat Limsangkass
  • Suphot Phatanasri
  • Piyasan Praserthdam
  • Joongjai Panpranot
  • Wuttithep Jareewatchara
  • Sirachaya Kunjara Na Ayudhya
  • Kongkiat Suriye
Article

Abstract

TiO2 was employed as an additional support by physical mixing with the WO3/SiO2 catalysts and used in the metathesis of ethylene and trans-2-butene for propylene production. Having nano-sized TiO2 as the additional support could enhance trans-2-butene conversion and propylene yield. The results suggested that tungsten could migrate from an original support and form more well-dispersed surface tetrahedral tungsten oxide species on the additional support, leading to a better dispersion. It was also shown that TiO2 having nano size could provide better spreading of the tungsten species than the micro size. A smaller crystallite size evidenced from XRD and a higher ratio between surface tetrahedral tungsten oxide species over crystalline WO3 evidenced from FT-Raman spectra of the nano-sized TiO2 systems were, among other things, advantageous to metathesis activity improvement of the catalyst. This study offers a guidance of supplementing the existing catalysts as one simple way of improvement in the catalytic performances which can easily be applied in the real metathesis reaction process.

Graphical Abstract

Keywords

Metathesis Additional support TiO2 Nano Micro 

Notes

Acknowledgments

The authors would like to thank the financial supports from Chulalongkorn University, the Thailand Research Fund (TRF), the Office of Higher Education Commission, and the NRU-CU (AM-1088D). The special thanks also go to the Ratchadaphiseksomphot Endowment Fund of Chulalongkorn University (RES560530021-CC). The Royal Golden Jubilee Ph.D. scholarship from TRF and SCG Chemicals for W.L. are also gratefully acknowledged.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Wimonrat Limsangkass
    • 1
  • Suphot Phatanasri
    • 1
  • Piyasan Praserthdam
    • 1
  • Joongjai Panpranot
    • 1
  • Wuttithep Jareewatchara
    • 2
  • Sirachaya Kunjara Na Ayudhya
    • 2
  • Kongkiat Suriye
    • 2
  1. 1.Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of EngineeringChulalongkorn UniversityBangkokThailand
  2. 2.SCG Chemicals, Co., Ltd.BangkokThailand

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