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<p>Two-stage mechanochemical treatment (MCT) of initial vanadium oxide and vanadyl hydrogen phosphate hemihydrate (VO(HPO<sub>4</sub>)·0.5H<sub>2</sub>O) permits to obtain the catalysts of ethane oxidative dehydrogenation (ODE) to ethylene with higher product yield and productivity. The V<sub>2</sub>O<sub>5</sub>, VO(HPO<sub>4</sub>)·0.5H<sub>2</sub>O samples (both initial and after MCT in air and ethanol) have been characterized by XRD, SEM, XPS and nitrogen adsorption technique. Activation of the catalysts by the reaction mixture leads to vanadyl pyrophosphate (VO)<sub>2</sub>P<sub>2</sub>O<sub>7</sub> (VPP) obtaining. After activation of VO(HPO<sub>4</sub>)·0.5H<sub>2</sub>O (MCT in air), the VPP mainly forms with an orientation along the (001) plane. These catalysts demonstrate higher results in ODE: 28-30% yield of ethylene and 0.15-0.16 g/(g·h) product productivity.</p>

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Mechanochemical Modification of Vanadium Phosphorus Oxide Catalysts of Ethane Oxidative Dehydrogenation to Ethylene

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • V. O. Zazhigalov,
  • O. A. Diyuk,
  • I. V. Bacherikova,
  • N. S. Kopachevska

摘要

Two-stage mechanochemical treatment (MCT) of initial vanadium oxide and vanadyl hydrogen phosphate hemihydrate (VO(HPO4)·0.5H2O) permits to obtain the catalysts of ethane oxidative dehydrogenation (ODE) to ethylene with higher product yield and productivity. The V2O5, VO(HPO4)·0.5H2O samples (both initial and after MCT in air and ethanol) have been characterized by XRD, SEM, XPS and nitrogen adsorption technique. Activation of the catalysts by the reaction mixture leads to vanadyl pyrophosphate (VO)2P2O7 (VPP) obtaining. After activation of VO(HPO4)·0.5H2O (MCT in air), the VPP mainly forms with an orientation along the (001) plane. These catalysts demonstrate higher results in ODE: 28-30% yield of ethylene and 0.15-0.16 g/(g·h) product productivity.