Resumo

MESA, Santiago; ARBOLEDA, Johana; AMAYA, Sandra  e  ECHAVARRIA, Adriana. NiZnFe and NiMgFe hydrotalcites modified with V and Cr as precusors of catalysts for oxidative dehydrogenation of propane. Ing. compet. [online]. 2012, vol.14, n.2, pp.169-178. ISSN 0123-3033.

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 500°C 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 400°C

Palavras-chave : Hydrotalcites; Mixed oxides; Oxidative dehydrogenation; Propylene.

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