Effects of Redox of Cu-Species in Copper-Strontium Hydroxyapatites on the Oxidative Dehydrogenation of Propane.

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  • Sugiyama Shigeru
    Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
  • Mitsuoka Hiromichi
    Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
  • Shono Tomotaka
    Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
  • Moriga Toshihiro
    Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
  • Hayashi Hiromu
    Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima

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Abstract

Although it is generally accepted that the catalytic activities of hydroxyapatites for the oxidative dehydrogenation of propane decrease upon addition of CCl4 into the feedstream, greater and stable activities have been found with copper-strontium hydroxyapatites (Cu-SrHAp) in the presence of CCl4. X-ray diffraction and X-ray absorption fine structure analyses of the catalysts used for the oxidation in the presence and absence of CCl4 demonstrate that deep reduction of Cu2+ to Cu0 of Cu-species in Cu-SrHAp during the oxidation is suppressed by the introduction of CCl4, resulting in an enhancement of the activities of the catalysts in the presence of CCl4.

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