Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing time

摘要: The aim of this work was to study the effect two precipitation pHs and three different ageing times on preparation simple LaFeO3 perovskites for their use as catalysts in methane combustion. Absorption atomic spectroscopy (AAS), BET specific area measurements, XRD analysis, Raman, XPS, TGA DTA TPR TPO profiles revealed that significant changes chemical composition, surface composition produced at pH 8 when time changed, leading solids with catalytic activity At higher studied, 10, physical chemistry properties all samples obtained are almost identical, therefore exhibit similar activities combustion reaction. were found be active combustion, perovskite’s structure became more important