Journal
CHEMSUSCHEM
Volume 7, Issue 2, Pages 510-522Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201300855
Keywords
alloys; biomass; nanoparticles; renewable resources; steam reforming
Funding
- Cabinet Office, Government of Japan through Funding Program for Next Generation World-Leading Researchers
- Grants-in-Aid for Scientific Research [13J05834] Funding Source: KAKEN
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Nickel-iron/magnesium/aluminum bimetallic catalysts were prepared by the calcination and reduction of nickel-magnesium-iron-aluminum hydrotalcite-like compounds. Characterization suggests that, at iron/nickel <= 0.5, both nickel and iron species are homogeneously distributed in the hydrotalcite precursor and incorporated into the Mg(Ni, Fe, Al)O periclase after calcination, giving rise to uniform nickel-iron alloy nanoparticles after reduction. Ni-Fe/Mg/Al (Fe/Ni = 0.25) exhibits the best catalytic performance for the steam reforming of tar derived from the pyrolysis of biomass. It is suggested that the uniform nickel-iron alloy nanoparticles and the synergy between nickel and iron are responsible for the high catalytic performance. Moreover, the Ni-Fe/Mg/Al catalyst exhibits much better regenerability toward oxidation-reduction treatment for the removal of deposited coke than that of conventional Ni-Fe/a-Al2O3. This property can be attributed to the better regeneration of Ni-Fe alloy nanoparticles through the formation and reduction of Mg(Ni, Fe, Al)O.
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