NiZnFe and NiMgFe hydrotalcites modified with V and Cr as precusors of catalysts for oxidative dehydrogenation of propane
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In this paper, two trimetallic hydrotalcite-like materials were synthesized using Ni, Zn, Mg and Fe. Further, those materials were modified with V and Cr species. Characterization of the obtained materials was carried out by atomic absorption spectroscopy, X ray diffraction, thermogravimetric analyses (TGA) and differential thermal analyses (DTA). Calcination temperature of 500ºC was determined by TGA in order to obtain mixed oxides, which were evaluated in oxidative dehydrogenation of propane (ODHP) using a space velocity of 50 ml/g.min. The best result was obtained using NiMgFe system, with yield of 5.13% and selectivity to propene of 34.35% at temperature of 400ºC.
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