The mechanism of reduction of iron oxide by hydrogen

Hsin Yu Lin, Yu Wen Chen, Chiuping Li

Research output: Contribution to journalArticlepeer-review

240 Scopus citations

Abstract

Precipitated iron oxide samples were characterized using temperature-programmed reduction. H2 was used as the reduction agents. The two-stage reduction was observed: Fe2O3 was reduced to Fe3O4 and then reduced to metallic Fe. The activation energy for the two reduction steps of iron oxide are 89.13 and 70.412 (kJ mol-1), respectively. The simulation by reduction models of the TPR patterns presents well fitting of unimolecular model for Fe2O3 → Fe3O4 reduction and two-dimensional nucleation according to Avarmi-Erofeev model for Fe3O4 → Fe.

Original languageEnglish
Pages (from-to)61-67
Number of pages7
JournalThermochimica Acta
Volume400
Issue number1-2
DOIs
StatePublished - 17 Apr 2003

Keywords

  • Iron oxide
  • Kinetic mechanism
  • Temperature-programmed reduction

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