Influence of Cr/Zr ratio on activity of Cr–Zr oxide catalysts in non-oxidative propane dehydrogenation A. V. Zubkov, T. A. Bugrova, M. A. Salaev, G. V. Mamontov
Material type: ArticleContent type: Текст Media type: электронный Subject(s): хромовые катализаторы | смешанные оксиды | цирконий | дегидрирование пропанаGenre/Form: статьи в журналах Online resources: Click here to access online In: Crystals Vol. 11, № 11. P. 1435 (1-12)Abstract: Two series of chromium–zirconium mixed oxide catalysts with different Cr/Zr molar ratio are prepared by co-precipitation method. Porous structure of the catalysts is studied by lowtemperature N2 adsorption–desorption. Phase composition and chromium states in the catalysts are characterized by X-ray diffraction (XRD), UV-visible spectroscopy, and temperature-programmed reduction with hydrogen (TPR-H2). The mixed catalysts are tested in non-oxidative dehydrogenation of propane at 550 C. The catalysts synthesized without ageing of precipitate show higher activity in propane dehydrogenation due to the higher content of reducible Cr+5/+6 species due to its stabilization on the ZrO2 surface.Библиогр.: 52 назв.
Two series of chromium–zirconium mixed oxide catalysts with different Cr/Zr molar ratio are prepared by co-precipitation method. Porous structure of the catalysts is studied by lowtemperature N2 adsorption–desorption. Phase composition and chromium states in the catalysts are characterized by X-ray diffraction (XRD), UV-visible spectroscopy, and temperature-programmed reduction with hydrogen (TPR-H2). The mixed catalysts are tested in non-oxidative dehydrogenation of propane at 550 C. The catalysts synthesized without ageing of precipitate show higher activity in propane dehydrogenation due to the higher content of reducible Cr+5/+6 species due to its stabilization on the ZrO2 surface.
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