• DOI:10.1007/s11144-020-01893-7
• Corpus ID: 225049104

Divanadium substituted keggin [PV2W10O40] on non-reducible supports-Al2O3 and SiO2: synthesis, characterization, and catalytic properties for oxidative dehydrogenation of propane

@article{Orozco2020DivanadiumSK,
  title={Divanadium substituted keggin [PV2W10O40] on non-reducible supports-Al2O3 and SiO2: synthesis, characterization, and catalytic properties for oxidative dehydrogenation of propane},
  author={J. Col{\'i}n Orozco and Damola T. Shuaib and Christopher L Marshall and M. Ishaque Khan},
  journal={Reaction Kinetics, Mechanisms and Catalysis},
  year={2020},
  volume={131},
  pages={753 - 768}
}

• J. C. Orozco, D. Shuaib, +1 author M. I. Khan
• Published 24 October 2020
• Chemistry
• Reaction Kinetics, Mechanisms and Catalysis

Molecular metal oxide cluster, K5[α-1,2-PV2W10O40] (PV2W10), was found to have intrinsic catalytic activity for the oxidative dehydrogenation of propane with high selectivity (> 80%) to propylene at low propane conversion (0.3%). Synthesis of dispersed PV2W10 in non-reducible supports, γ-Al2O3 and SiO2, was done by incipient wetness impregnation. The supported catalysts were characterized by IR, Raman spectroscopy, nitrogen adsorption, x-ray powder diffraction (PXRD), elemental analysis, hydrogen temperature-programmed reduction (H2–TPR), and ammonia temperature-programmed desorption (NH3–TPD). Catalytic testing of the supported PV2W10 at equimolar cluster concentration revealed that when supported in γ-Al2O3 it is more active (sevenfold increase in propane conversion) but in SiO2 it is more selective to propylene (94%). The observed performance was due to both an increase in reducibility and higher concentration of strong acid sites for PV2W10 supported in γ-Al2O3 versus SiO2. Lastly, PV2W10 was shown to remain intact under reaction conditions indicating its thermal and oxidative stability.