La-based perovskite precursors preparation and its catalytic activity for CO2 refonning of CH4

Four perovskite-type precursors (LaNiO3, La2NiO4, LaCoO3 and La2CoO4) were successfully prepared by Pechini method and were characterized by X-ray powder diffraction (XRD), temperature-programmed reduction technique (TPR) and X-ray photoelectron spectroscopy (XPS). After reduction, their catalytic activity toward CO2 reforming of CH4 was tested in a fixed-bed reactor. It was found that Ni-based La2NiO4 catalyst, after calcinations at 850 or 1100 degreesC, was quite active and stable with CH4 conversion of 72% and 75%, respectively. It was proposed that the well-defined structure and La2O2CO3 phase might be responsible for the unusual catalytic behavior observed over the catalyst. (C) 2003 Elsevier Science B.V. All rights reserved.