Ni/ZrO2-CeO2 Catalysts for the Simultaneous Production of Hydrogen and Carbon Nanotubes
The catalytic methane decomposition (CMD) using Ni/ZrO2-CeO2 catalysts for the simultaneous production of hydrogen and carbon nanotubes, was studied on samples prepared by different synthesis methods. The catalysts were synthesized by the impregnation and coprecipitation methods with or without ultrasound treatment. X-ray diffraction (XRD), Raman spectroscopy and high resolution transmission electron microscopy (HRTEM) were the main characterization techniques. It was observed that the Ni impregnated catalyst with ultrasound treatment increases significantly the production of hydrogen and carbon nanotubes in the CDM at 500 °C. The results also indicated that the synthesis of catalysts via coprecipitation generates a higher number of encapsulated Ni particles by both, the ZrO2-CeO2 support and the produced carbon at the end of the reaction.
Hydrogen Production; Carbon Nanotubes; Catalytic Methane Decomposition; Ultrasound Irradiation Treatment.
The authors thank to the Instituto Politecnico Nacional for the financial support granted for the development of this work. The authors also recognize the experimental support of the CNMC-IPN for the completion of the presented work, as well as the facilities of the Instituto Mexicano del Petroleo.
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