Regenerability of hydrotalcite-derived nickel-iron alloy nanoparticles for syngas production from biomass tar

Dalin Li, Mitsuru Koike, Lei Wang, Yoshinao Nakagawa, Ya Xu, Keiichi Tomishige

Research output: Contribution to journalArticlepeer-review

111 Citations (Scopus)

Abstract

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/α-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.

Original languageEnglish
Pages (from-to)510-522
Number of pages13
JournalChemSusChem
Volume7
Issue number2
DOIs
Publication statusPublished - 2014 Feb

Keywords

  • alloys
  • biomass
  • nanoparticles
  • renewable resources
  • steam reforming

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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