The mechanism of reduction of iron oxide by hydrogen

被引：294

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

页码：61 / 67

页数：7

共 25 条

[1] TEMPERATURE-PROGRAMMED REDUCTION OF MOO3 AND MOO2 [J].