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- Title
Supported MgO-VO/AlO catalysts for oxidative propane dehydration: Effect of the molar Mg : V ratio on the phase composition and catalytic properties of samples.
- Authors
Sushchenko, E.; Kharlamova, T.; Izaak, T.; Vodyankina, O.
- Abstract
The physicochemical properties of VO/AlO and MgO-VO/AlO supported catalysts (Mg : V = 1 : 1, 2 : 1, and 3 : 2) obtained by consecutive impregnation of the support with solutions of vanadium and magnesium precursors are studied using a complex of mutually complementary methods (XRD, Raman spectroscopy, UV-Vis spectrometry, and TPR-H). The effect of the formation of surface magnesium vanadates of various composition and structure on the catalytic properties of the supported vanadium oxide catalysts in the oxidative dehydrogenation of propane is studied. The introduction of magnesium in the samples and an increase in its content, accompanied by a change in the structure of the surface vanadium oxide phases from polymeric VO/VO species to surface metavanadate species, magnesium metavanadate, and further to magnesium divanadate, significantly affects their catalytic properties in the reaction of the oxidative dehydrogenation of propane to propylene.
- Subjects
VANADIUM catalysts; VANADIUM oxide; OXIDATIVE dehydrogenation; PROPANE; X-ray powder diffraction; RAMAN spectroscopy; ULTRAVIOLET-visible spectroscopy
- Publication
Kinetics & Catalysis, 2017, Vol 58, Issue 5, p630
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1134/S0023158417050202