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Ni/La2O3-SiO2 catalysts were obtained by different methods of preparation: sequential impregnation, simultaneous impregnation (I-sim), precipitation of support followed by Ni impregnation and co-precipitation. The samples were characterized by energy-dispersive X-ray spectroscopy, nitrogen physisorption, X-ray diffraction (XRD), infrared spectroscopy, temperature programmed reduction (TPR), H2 chemisorption, scanning electron microscopy and thermogravimetric analysis. XRD and TPR results indicated two Ni species in the samples: NiO (I-sim) and La2NiO4 (other samples). Catalytic tests were performed in glycerol steam reforming at 600 oC. The best result was observed with I-sim catalyst, which presented the higher reduction degree, metallic dispersion and metallic area (TPR and TPD). This catalyst was also tested at 500 oC and 700 oC and performed best at 600 oC.

journal of the brazilian chemical society

Ni/La2O3-SiO2Catalysts Applied to Glycerol Steam Reforming Reaction: Effect of the Preparation Method and Reaction Temperature