Preparation and Characterization of Perovskite-Type Oxide Catalysts for Combustion of Methane
A series of rare earth perovskite-type oxides La09Sr0.1Co0.9Mn0.1O3La08Sr0.2Co0.8Mn0.2O3 and La05Sr0.5Co0.5Mn0.5O3 were prepared along the sol-gel method and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy techniques (TEM) and catalytic activity measurement for combustion of CH4. The results indicated that a perfect crystal structure of perovskite was formed and La3+ and Co3+ ions were partly replaced by Sr2+ and Mn3+ ions, respectively, and perovskite-type oxides were composed of nanocrystals with particle size of 20~50nm. The catalytic activity for the combustion of CH4 was evaluated and La05Sr0.5Co0.5Mn0.5O3 exhibited best performance with the temperature of 50% and 90% conversion efficiency of 723K and 833K.
Jinsheng Liang and Lijuan Wang
G. Xue et al., "Preparation and Characterization of Perovskite-Type Oxide Catalysts for Combustion of Methane", Advanced Materials Research, Vol. 427, pp. 77-81, 2012