Application of a Microreactor in the Oxidative Dehydrogenation of Propane to Propylene on Calcium Hydroxyapatite and Magnesium ortho-Vanadate Doped and Undoped with Palladium

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  • Sugiyama Shigeru
    Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima Department of Geosphere Environment and Energy, Center for Frontier Research of Engineering, The University of Tokushima Department of Chemical Science and Technology, The University of Tokushima
  • Sugimoto Naoto
    Department of Chemical Science and Technology, The University of Tokushima
  • Ozaki Adusa
    Department of Chemical Science and Technology, The University of Tokushima
  • Furukawa Yukimi
    Department of Chemical Science and Technology, The University of Tokushima
  • Nakagawa Keizo
    Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima Department of Geosphere Environment and Energy, Center for Frontier Research of Engineering, The University of Tokushima Department of Chemical Science and Technology, The University of Tokushima
  • Sotowa Ken-Ichiro
    Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima Department of Geosphere Environment and Energy, Center for Frontier Research of Engineering, The University of Tokushima Department of Chemical Science and Technology, The University of Tokushima

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A microreactor was employed for the oxidative dehydrogenation of propane to propylene in order to suppress a deep oxidation of the resultant propylene to CO and CO2. Magnesium ortho-vanadate, doped and undoped with palladium, and calcium hydroxyapatite, were used as catalysts while the reaction temperature was controlled by steady- and unsteady-state conditions. The enhancement of the selectivity to propylene was the most advantageous effect from using the microreactor, and it occurred when calcium hydroxyapatite was used under an unsteady-state. For example, the selectivity to propylene was 0 and 73.0% using a fixed-bed continuous-flow reactor and the microreactor, respectively, under almost identical propane conversion of 3.1 and 3.2%, respectively. The advantageous effect was also achieved, although to a lesser degree, when magnesium ortho-vanadate was used undoped with palladium under both steady- and unsteady-state conditions. However these advantageous effects of the microreactor were not observed with magnesium ortho-vanadate doped with palladium. With regard to the selectivity to propylene, the redox nature of the catalysts seemed to influence the performance of the microreactor.

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