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Improved catalytic properties of Co3O4-impregnated La2O3/MgO over Co3O4/MgO catalyst in the oxidative dehydrogenation of ethylbenzene

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Abstract

A series of lanthanum oxide (La2O3—2–14 wt%)-encapsulated Co3O4/MgO catalysts and bare Co/MgO solid oxides were prepared by wetness impregnation method. Among all catalysts, La2O3-promoted Co3O4/MgO (CM) was found to be remarkable in terms of superior promotional effect of La oxide species. Therefore, La2O3-incorporated Co3O4/MgO (LCM) catalysts afforded unusual catalytic activity efficiency with respect to high EB conversion and styrene selectivity due to the synergistic effect of Co–La species. By contrast, bare Co3O4/MgO solid oxide (CM) catalyst afforded low EB conversion with mild catalytic activity due to the absence of promotional role of La oxide.

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Correspondence to Venkata Rao Madduluri or Kamaraju Seetha Rama Rao.

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Madduluri, V.R., Narsinga, R., Mallesh, D. et al. Improved catalytic properties of Co3O4-impregnated La2O3/MgO over Co3O4/MgO catalyst in the oxidative dehydrogenation of ethylbenzene. Res Chem Intermed (2020) doi:10.1007/s11164-019-04070-1

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Keywords

  • Ethylbenzene
  • Styrene
  • Co3O4
  • La2O3
  • MgO
  • CO2