Síntese e caracteriza??o de perovskitas LaNi(1-x)Co xO3 como precursores de catalisadores para a convers?o do metano a gás de síntese pela reforma com CO2

摘要

LaNiO3 perovskite was modified by partial substitution of nickel by cobalt in order to increase the stability and resistance to carbon deposition during the methane CO2 reforming. The results showed that a suitable combination of precipitation and calcination steps resulted in oxides with the desired structure and with important properties for application in heterogeneous catalysis. The partial substitution of Ni by Co resulted in lower rates of conversion of both the reactants, but the catalyst stability was highly increased. The LaNi0.3Co0.7O3 catalyst, calcined at 800 oC, was the most active under the reaction conditions.