Catalytic performance and characterization of Co-Fe bcc alloy nanoparticles prepared from hydrotalcite-like precursors in the steam gasification of biomass-derived tar

Lei Wang, Jinhai Chen, Hideo Watanabe, Ya Xu, Masazumi Tamura, Yoshinao Nakagawa, Keiichi Tomishige

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

The Co-Fe/Mg/Al catalysts were prepared from the hydrotalcite-like compounds containing Co, Fe, Mg and Al, and applied to the steam gasification of biomass-derived tar. The characterization using TPR, TPO, XRD, H2 adsorption, TEM and EXAFS indicates that the Co-Fe/Mg/Al catalysts have a nanocomposite structure of the Co-Fe bcc alloy particles and the oxide particles of MgAl2O4-based solid solution after the reduction, where Co metal atoms can substitute partially Fe metal sites in bcc Fe metal regarding the Co-Fe bcc alloy particles. The composition of the Co-Fe/Mg/Al catalysts was optimized on the basis of the activity tests. The optimized Co-Fe/Mg/Al catalyst exhibited higher catalytic performance than the reported catalysts such as Co-Fe/α-Al2O3, Co/Mg/Al, Ni-Fe/Mg/Al in terms of activity and resistance to coke deposition. This behavior can be explained by the formation of the Co-Fe bcc alloy nanoparticles with rather uniform composition on MgAl2O4-based solid solution.

Original languageEnglish
Pages (from-to)701-715
Number of pages15
JournalApplied Catalysis B: Environmental
Volume160-161
Issue number1
DOIs
Publication statusPublished - 2014 Nov

Keywords

  • Biomass
  • Co-Fe alloy
  • Hydrotalcite
  • Steam gasification
  • Tar

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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