The Effect of Fe in Perovskite Catalysts for Steam CO2 Reforming of Methane

Abstract

In this work, La0.95Sr0.05N1-xFexO3 catalysts were prepared by modified EDTA-cellulose method and the catalysts were characterized by various techniques such as N-2 physisorption, TPR, XRD, SEM, TEM-EDS and TG analysis. La(0.5)Sro NiO5Fe0.5O3 catalyst showed better catalytic performance under the reaction conditions of 900 degrees C, 21 bar and feed molar ratio of CH4:CO2:H2O = 1:0.7:1.5. It is considered that the dilution effect on nickel prevented the formation of large monometallic ensembles that favour the carbon deposition in reforming reactions, and the mean metallic particle size of Ni decreased with increasing substitution rate in B site. Therefore, partial substitution of Fe in B site enhances the dilution effect and induces a reaction between CO2 and La2O3, thereby resisting the carbon deposition and increasing CO2 conversion.