Kinetic Analysis of the Iron Oxide Reduction Using Hydrogen-Carbon Monoxide Mixtures as Reducing Agent

By A. Bonalde, A. Henriquez, M. Manrique. 2005

187 citations recorded by the source corpus.

The kinetics of the reduction of hematite pellets using hydrogen-carbon monoxide mixtures as reducing agent was described by using the "grain model". This model involves the particle size and the porosity of the pellet asmain structural parameters which affect directly the kinetics of the hematite pellets during the reduction process. The predictions of the model were compared with the experimental results. Fired hematite pellets were reduced at 850°C using hydrogen, carbon monoxide and Midrex gas. The weight loss technique was used to follow the reduction process. The reduction of iron oxide pellets using hydrogen or carbon monoxide is a mixed controlled system, where chemical reaction and internal gas diffusion are competing processes during the first stage of the reduction, while internal gas diffusion becomes controlling step at the last stage of the process. The reduction of iron oxide pellets using Midrex gas is a mixed controlled system throughout the whole reduction process.

Subfields: Biomedical Engineering, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/c878d1770dbeeec291530efeb6515eb42a611487

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In Biomedical Engineering

1. Baptiste Gault
2. F. Patisson
3. Dierk Raabe
4. Yanbiao Chen
5. H. Zuo
6. O. Mirgaux
7. L. Stephenson
8. O. A. Zambrano

In Materials Chemistry

1. Baptiste Gault
2. F. Patisson
3. Dierk Raabe
4. Yanbiao Chen
5. H. Zuo
6. O. Mirgaux
7. M. Rohwerder
8. Franz Roters

In Mechanical Engineering

1. Baptiste Gault
2. Yanbiao Chen
3. O. Mirgaux
4. F. Patisson
5. Dierk Raabe
6. H. Zuo
7. Franz Roters
8. O. A. Zambrano

Citations in the corpus

• Hydrogen Ironmaking: How It Works (2020, methodology): “56%H2 and 34% CO), data from [26]; (b): relative reduction rates at 55% conversi at 780, 900 and 1234 ◦C as a function of the H2 content in the H2-CO mixture, data from [25].”
• Reduction kinetics of iron oxide pellets with H2 and CO mixtures (2015, background): “[16] reported on the kinetic analysis of iron oxide reduction through a batch of experiments on the re-”
• Influence of microstructure and atomic-scale chemistry on the direct reduction of iron ore with hydrogen at 700°C (2021, background): “[26] is hat the phase boundary is moving towards the center of the pelet.”
• Sustainable steel through hydrogen plasma reduction of iron ore: Process, kinetics, microstructure, chemistry (2021, unknown): “[ 15 , 18 ] is at least twice as high as the one used in our preceding work [21] (0.5 L/min at 700 ° C, brown line in Fig.”
• Review of hydrogen-rich ironmaking technology in blast furnace (2021, background): “Effect of hydrogen ratio fraction on reduction rate The reduction rate increases with the increase of H2 ratio in the gas of blast furnace [62,71,72].”