The mechanism of reduction of iron oxide by hydrogen

被引：286
|
作者：
Lin, HY
Chen, YW [1 ]
Li, CP
机构：
[1] Natl Cent Univ, Dept Chem Engn, Chungli 32054, Taiwan
[2] Chinese Petr Cooperat, Div Fine Chem & Solvents, Chiayi 60036, Taiwan
来源：
THERMOCHIMICA ACTA | 2003年 / 400卷 / 1-2期
关键词：
temperature-programmed reduction; iron oxide; kinetic mechanism;
D O I：
10.1016/S0040-6031(02)00478-1
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Precipitated iron oxide samples were characterized using temperature-programmed reduction. H-2 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. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：61 / 67
页数：7
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