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Title: Glycerol steam reforming over Ru-Mg-Al hydrotalcite-derived mixed oxides: role of the preparation method in catalytic activity
Authors: Dahdah, Eliane
Aouad, Samer 
Gennequin, Cédric
Estephane, Jane 
Nsouli, Bilal
AbouKais, Antoine
Abi Aad, Edmond
Affiliations: Department of Chemistry 
Department of Chemical Engineering 
Keywords: Ruthenium
Subjects: Catalysts
Issue Date: 2018
Part of: International journal of hydrogen energy
Volume: 43
Issue: 43
Start page: 19864
End page: 19872
Ru-Mg-Al hydrotalcite-derived mixed oxides were synthesized using two preparation methods. The grafted catalyst was prepared by co-precipitation of the Ru/Mg/Al precursors at a constant pH. The impregnated catalyst was prepared by wet-impregnation of a calcined Mg-Al support with the Ru precursor (Ru(NO) (NO3)3). Both catalysts were calcined at 600 °C and characterized by X-ray diffraction, CO2- temperature programmed desorption and H2-temperature programmed reduction techniques. Catalytic activities were compared in the glycerol steam reforming reaction (400–700 °C, WGFR 9:1, flow rate: 0.075 ml/min) followed by a short-term stability test at 600 °C. The impregnated catalyst demonstrated a superior activity beyond 600 °C. This difference in activity was attributed to the easier accessibility of the active phase resulting from the preparation method. Short-term stability tests revealed deactivation of both catalysts as a result of coke formation.
Type: Journal Article
Appears in Collections:Department of Chemistry

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