Ni‑supported catalysts for ethanol steam reforming: effect of the solvent and metallic precursor in catalyst preparation

MARIANA NOELIA BARROSO; MANUEL F. GOMEZ; MARIA CRISTINA ABELLO; ALEJANDRA VILLAGRAN OLIVARES

International Journal of Industrial Chemistry

Springer

Año: 2018 vol. 9 p. 61 - 73

2228-5970

    Ethanol steam reformingwas studied over Ni/MgAl2O4-CeO2 catalysts.The catalysts were prepared using different impregnation media (ethanol orwater) and Ni precursors (nitrate or acetate). The use of an alcoholic solutiondid not affect the specific surface area but promoted the NiO formationreducible at lower temperature affecting the Ni-support interactions and the Ce3+/Ce4+initial ratios.All catalysts were highlyactive in the reforming reaction of ethanol with a high initial conversion ofethanol under more severe conditions than those commonly used in literature.The best catalytic behavior was found over the catalyst prepared from anethanolic solution of Ni(NO3)2. This sample showed a highCe3+/Ce4+ ratio, an adequate interaction Ni-support andan average Ni diameter around 28 nm. This catalyst was stable under thereforming conditions used in this work: initial ethanol concentration: 9.4%,reaction temperature: 650°C, W/F = 49 g min mol and reaction time: 40h. The ethanol conversion was almost complete with H2 selectivityaround 78%.