title: Regenerability of hydrotalcite-derived nickel-iron alloy nanoparticles for syngas production from biomass tar.
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-Al2 O3 . 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.
authors.affiliation: 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). dalinli@fzu.edu.cn.
authors.forename: Dalin
authors.initials: D
authors.lastname: Li
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Koike
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Yoshinao
authors.initials: Y
authors.lastname: Nakagawa
authors.forename: Ya
authors.initials: Y
authors.lastname: Xu
authors.forename: Keiichi
authors.initials: K
authors.lastname: Tomishige
mesh_terms: D000497:Alloys / Q000737:chemistry*; D000536:Aluminum Hydroxide / Q000737:chemistry*; D018533:Biomass; D002384:Catalysis; D007501:Iron / Q000737:chemistry*; D008276:Magnesium Hydroxide / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D013638:Tars / Q000737:chemistry*
chemical_list: D000497:Alloys; D013638:Tars; C010467:hydrotalcite; D000536:Aluminum Hydroxide; D009532:Nickel; D007501:Iron; D008276:Magnesium Hydroxide
keywords: alloys; biomass; nanoparticles; renewable resources; steam reforming