Co catalysts modified by rare earths (La, Ce or Pr) for hydrogen production from ethanol

Co/MgAl2O4 catalysts modified with La, Pr or Ce were prepared, characterized by different techniques and tested in ethanol steam reforming reaction to produce hydrogen. The catalytic behavior at 650 °C depended on the nature of rare earth. The amount of carbon on promoted catalysts was significantly...

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Bibliographic Details
Published in:International journal of hydrogen energy 2014-05, Vol.39 (16), p.8712-8719
Main Authors: Barroso, Mariana N., Gomez, Manuel F., Arrúa, Luis A., Abello, M. Cristina
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Carbon
Catalysis
Catalysts
Co-catalysts
Dispersions
Energy
Ethanol
Ethanol steam reforming
Ethyl alcohol
Exact sciences and technology
Fuels
Hydrogen
Hydrogen production
Rare earth metals
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Summary:Co/MgAl2O4 catalysts modified with La, Pr or Ce were prepared, characterized by different techniques and tested in ethanol steam reforming reaction to produce hydrogen. The catalytic behavior at 650 °C depended on the nature of rare earth. The amount of carbon on promoted catalysts was significantly lower than that on unpromoted one. The Pr and La containing catalysts produced a high acetaldehyde selectivity which decreased the hydrogen production. The superior performance of the catalyst promoted with 7.8% Ce could be partially explained by a higher dispersion and a high reduction of Co species. [Display omitted] •The promotor effect of three rare earths (La, Ce and Pr) was studied over Co-catalysts.•Cerium was the most effective promoter for Co/MgAl2O4 catalyst in ethanol steam reforming reaction.•Pr and La containing catalysts produced a high acetaldehyde selectivity.•The addition of rare earths increased the carbon resistance of Co catalysts.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2013.12.043