In this work, the production of Syngas (H2/CO) from oxidative reforming of methane (ORM) and partial oxidation of methane\n(POM) over NiO/Y2O3/ZrO2 catalysts was studied. The nickel concentration was varied (ranging from 0 to 40 wt.%) aiming to\noptimize the performance in ORM and POM reactions; these reactions were carried out at 750 C and 1 atm for 6 hours. The\ncatalysts were prepared by the one-step polymerization method (OSP) and characterized by different techniques. This method led\nto production of materials of smaller crystallite size than others of similar composition prepared under other methods; the\ncatalysts presented good nickel dispersion, well-defined crystalline structure, and well-defined geometrical morphology. Additionally,\nthe OSP method was advantageous because it was carried out in a single calcination step. The catalyst containing 20%\nwt. of nickel (20Ni20YZ sample) showed the highest methane conversion, high selectivity to H2 and CO, low carbon deposition\nrates, and, curiously, the best geometric morphology. The results of this paper also demonstrated that the nickel concentration in\nthe mixture strongly influenced the morphology of the catalysts; therefore, the morphology also influenced the catalytic performances\nduring the Syngas production reactions.
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