Ni-Fe Catalysts Derived from Perovskite Precursors for Partial Oxidation of Methane
Camila R. B. Silva,
Nielson F.P. Ribeiro,
Mariana M.V.M. Souza.
LaNi1-xFexO3 perovskites (x= 0, 0.2 and 0.4) were synthesized by the combustion method with urea and used as
catalyst precursors in the partial oxidation of methane (POM). LaNiO3 was obtained as a single phase, while NiO and
La(OH)3 were also detected in Fe-doped samples. The substitution of Ni by Fe in LaNiO3 perovskite resulted in a decrease
in the specific surface area and an increase in the reduction temperature. The perovskite structure was completely
decomposed by reduction, with formation of Ni°-Fe° and La2O3 phases. Activity cycles between 400 and 800°C revealed
that the introduction of Fe decreased the catalytic activity for POM reaction at high temperatures. The catalysts showed
great stability during 24 h on stream at 750°C without carbon deposition.
Keywords: Ni-Fe catalysts, perovskites, partial oxidation, methane, syngas, Fischer-Tropsch reaction, Combustion, perovskite catalysts, nano-sized, propellant chemistry, thermal conductivity detector, Carboxen columns, XRD, metallic nickel
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