Abstract
Supported nickel catalysts with core/shell structures of Ni/Al 2O 3 and Ni/MgO–Al 2O 3 were synthesized under multi-bubble sonoluminescence (MBSL) conditions and tested for dry reforming of methane (DRM) to produce hydrogen and carbon monoxide. A supported Ni catalyst made of 10% Ni loading on Al 2O 3 and MgO–Al 2O 3, which performed best in the steam reforming of methane (97% methane conversion at 750 °C) and in the partial oxidation of methane (96% methane conversion at 800 °C), showed also good performance in DRM and excellent thermal stability for the first 150 h. The supported Ni catalysts Ni/Al 2O 3 and Ni/MgO–Al 2O 3 yielded methane conversions of 92% and 92.5%, respectively and CO 2 conversions of 95.0% and 91.8%, respectively, at a reaction temperature of 800 °C with a molar ratio of CH 4/CO 2 = 1. Those were near thermodynamic equilibrium values.
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