The mechanism of reduction of iron oxide by hydrogen

Hsin Yu Lin; Yu Wen Chen; Chiuping Li

doi:10.1016/S0040-6031(02)00478-1

The mechanism of reduction of iron oxide by hydrogen

Hsin Yu Lin, Yu Wen Chen, Chiuping Li

Department of Chemical and Materials Engineering

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	61-67
Number of pages	7
Journal	Thermochimica Acta
Volume	400
Issue number	1-2
DOIs	https://doi.org/10.1016/S0040-6031(02)00478-1
State	Published - 17 Apr 2003

Keywords

Iron oxide
Kinetic mechanism
Temperature-programmed reduction

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10.1016/S0040-6031(02)00478-1

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title = "The mechanism of reduction of iron oxide by hydrogen",

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.",

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T1 - The mechanism of reduction of iron oxide by hydrogen

AU - Lin, Hsin Yu

AU - Chen, Yu Wen

AU - Li, Chiuping

PY - 2003/4/17

Y1 - 2003/4/17

N2 - 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.

AB - 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.

KW - Iron oxide

KW - Kinetic mechanism

KW - Temperature-programmed reduction

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U2 - 10.1016/S0040-6031(02)00478-1

DO - 10.1016/S0040-6031(02)00478-1

M3 - 期刊論文

AN - SCOPUS:0037452023

VL - 400

SP - 61

EP - 67

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

IS - 1-2

ER -

The mechanism of reduction of iron oxide by hydrogen

Abstract

Keywords

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