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 language | English |
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Pages (from-to) | 61-67 |
Number of pages | 7 |
Journal | Thermochimica Acta |
Volume | 400 |
Issue number | 1-2 |
DOIs | |
State | Published - 17 Apr 2003 |
Keywords
- Iron oxide
- Kinetic mechanism
- Temperature-programmed reduction