Regenerability of Hydrotalcite-Derived Nickel–Iron Alloy Nanoparticles for Syngas Production from Biomass Tar

Authors

  • Prof. Dalin Li,

    Corresponding author
    1. National Engineering Research Center of Chemical Fertilizer Catalyst (NERC), College of Chemistry and Chemical Engineering, Fuzhou University, Gongye Road 523, Fuzhou 350002, Fujian (P.R. China)
    • Dalin Li, National Engineering Research Center of Chemical Fertilizer Catalyst (NERC), College of Chemistry and Chemical Engineering, Fuzhou University, Gongye Road 523, Fuzhou 350002, Fujian (P.R. China)

      Keiichi Tomishige, Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 22-795-7214

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  • Dr. Mitsuru Koike,

    1. Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 22-795-7214
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  • Dr. Lei Wang,

    1. Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 22-795-7214
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  • Prof. Yoshinao Nakagawa,

    1. Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 22-795-7214
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  • Prof. Ya Xu,

    1. National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047 (Japan)
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  • Prof. Keiichi Tomishige

    Corresponding author
    1. Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 22-795-7214
    • Dalin Li, National Engineering Research Center of Chemical Fertilizer Catalyst (NERC), College of Chemistry and Chemical Engineering, Fuzhou University, Gongye Road 523, Fuzhou 350002, Fujian (P.R. China)

      Keiichi Tomishige, Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 22-795-7214

    Search for more papers by this author

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.

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