Methane steam reforming and ethanol steam reforming using a Ni(II)-Al(III) catalyst prepared from lamellar double hydroxides

J. COMAS, M.L. DIEUZEIDE, G. BARONETTI, M. LABORDE, N. AMADEO

CHEMICAL ENGINEERING JOURNAL

Elsevier

Lugar: Amsterdam; Año: 2006 vol. 118 p. 11 - 15

1385-8947

In this work the methane steam reforming (MSR) and the ethanol steam reforming (ESR) on Ni(II)-Al(III) catalyst prepared fromlamellar double hydroxides (LDHs) as precursor are studied. A comprehensive analysis of the kinetics results obtained at differentwater/methane and water/ethanol feed ratio and its correlation with the structural characteristic and redox behavior of the catalyst is carriedout.The results show evidence that the catalyst behavior is related with the presence of only one type of active site in the Ni/Al2O3 catalyst. Thecompetition for the active sites between reactants is verified for MSR. This behavior is also observed in ethanol steam reforming since methanesteam reforming determines the products distribution in the exit stream. There would be an optimum inlet water concentration that gives a maximumperformance in terms of H2 and CO2 selectivity and, simultaneously, a minimum CO selectivity. This is a promissory result taking into accountthat the hydrogen flow entering a PEM fuel-cell requires a CO concentration lower than 20 ppm.