Vanadium promoted Ni(Mg,Al)O hydrotalcite-derived catalysts for CO2 methanation |
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Authors: | Katarzyna ?wirk Paulina Summa Dominik Wierzbicki Monika Motak Patrick Da Costa |
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Affiliation: | 1. Sorbonne Université, Institut Jean Le Rond d''Alembert, CNRS UMR 7190, 78210 Saint-Cyr-l''Ecole, France;2. AGH University of Science and Technology, Faculty of Energy and Fuels, 30-059 Cracow, Poland |
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Abstract: | A series of V-promoted hydrotalcite-derived nickel catalysts (1.0, 2.0, and 4.0 wt%) were tested in CO2 methanation. Ni–I–V2.0 with 2.0 wt% vanadium loading showed the highest catalytic activity, achieving 74.7% of CO2 conversion and 100% of CH4 selectivity at 300 °C. XRD and XANES analyses showed that the smallest Ni0 particles in Ni–I–V2.0 were consistent with the improved textural features observed for this catalyst. Moreover, CO2-TPD revealed the highest sum of weak and medium basic sites in Ni–I–V2.0 that can positively influence catalytic behavior. For the studied catalysts, a clear correlation was demonstrated between the catalytic activity and specific surface area, as well as the basic properties. |
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Keywords: | Hydrotalcite Nickel Vanadium Basicity |
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