Nickel-based catalyst derived from NiO–Ce0.75Zr0.25O2 nanocrystalline composite: Effect of the synthetic route on the partial oxidation of methane

• Published in: Ceramics international Vol. 42; no. 14; pp. 16084 - 16089
• Main Authors: da Silveira, V.R., Melo, D.M.A., Barros, B.S., Ruiz, J.A.C., Rojas, Leopoldo O. Alcazar
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2016
• Subjects: Microwave; Partial oxidation of methane; Pechini; Self-combustion; Syngas; Microwave; Self-combustion; Pechini; Partial oxidation of methane; Syngas
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2016.07.119

In this work, we investigated the effects of two different synthetic routes, Pechini and microwave-induced combustion method, on the properties of nickel-based catalysts derived from NiO-Ce0.75Zr0.25O2 nanocomposite. Powder samples were characterized by specific surface area (SSA) via BET method, X-ray diffraction (XRD), scanning electron microscopy (SEM) and temperature-programmed reduction (TPR). It was found that the synthesis method has a significant influence on the powder morphology, which may affect the catalytic activity. The nickel-based catalysts were tested for the partial oxidation of methane showing high CH4 conversion, 80% and 81% after the first hour on stream, for the samples prepared by Pechini and combustion method, respectively. These samples also exhibited catalytic stability, keeping CH4 conversion levels about 77% and 80% after ten hours on stream, respectively. We suggest that such good performance is related to the good dispersion and particle size of the metallic nickel over Zr-CeO2 support.