INVESTIGADORES
AMADEO Norma Elvira
artículos
Título:
Ethanol steam reforming on Ni/Al2O3 catalysts: Effect of Mg addition
Autor/es:
A.J. VIZCAÍNO, P. ARENA, G. BARONETTI, A. CARRERO, J.A. CALLES, M.A. LABORDE, N. AMADEO
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2007
ISSN:
0360-3199
Resumen:
Ethanol steam reforming is an interesting alternative for hydrogen production since
ethanol can be renewably obtained. Use of lamellar double hydroxides (LDHs) as precursors
of nickel catalysts leads to highly dispersed metal particles in an aluminium structure. In
this sense, a Ni(II)Al(III) catalyst was synthesized from a LDH precursor and tested in
ethanol steam reforming. Although this catalyst presents high stability, acidity of alumina
promotes carbon deposition from ethylene through ethanol dehydration. For this reason, in
order to neutralize acid sites, a series of catalysts was prepared by Mg addition to LDH
precursors varying Mg/Ni ratio. The effect of Mg/Ni ratio in the catalyst on coke formation
during ethanol steam reforming was studied, resulting in significant reduction of the
amount of deposited carbon for Mg/Ni ratio higher than 0.1. Moreover, Mg addition
increases the catalytic activity due to lower ethylene formation, which competes with
ethanol for the same Ni active sites.