Synthesis of novel WO3/ZrSiO4 catalysts for dehalogenation of halogenated hydrocarbons

  • Vesna Nikolic Innovation Centre of the Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4 11120 Belgrade, Serbia
  • Željko Kamberović Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4 11120 Belgrade, Serbia
  • Milisav Ranitović Innovation Centre of the Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4 11120 Belgrade, Serbia
  • Milorad Gavrilovski Innovation Centre of the Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4 11120 Belgrade, Serbia
  • Zoran Anđić Innovation Center of the Faculty of Chemistry, University of Belgrade, Serbia
Keywords: catalyst, Tungsten (VI) oxide, Zirconium (IV) silicate, halogenated hydrocarbons, cooling equipment recycling

Abstract

This research aimed to develop a novel catalyst based on WO3/ZrSiO4 system for halogenated hydrocarbons processing. The production method of this catalyst involved extrusion and as such was simplified compared to thermo-chemical synthesis routes. It had a reduced number of process stages and a lower environmental impact at the same time. In order to examine the phase composition of the catalyst after sintering at 800 °C, the XRD analysis was carried out. The catalyst was then tested in chlorodifluoromethane dehalogenation process on laboratory scale at temperatures of 300, 400 and 500 °C in the presence of water vapor. Catalyst achieves high dehalogenation efficiencies of 88.6, 95.9, and 99.5 % for each of the process temperatures, respectively. Obtained results are in the range with those achieved by using thermo-chemically prepared dehalogenation catalysts.

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Published
2019-03-31
Section
Full length research papers