Original scientific paper

Kinetics of pellet reduced by H₂ and the mixture of CO and H₂

S. Geng ; School of Materials Science and Engineering, Shanghai University, China
H. Zhang ; School of Materials Science and Engineering, Shanghai University, China
W. Ding ; School of Materials Science and Engineering, Shanghai University, China
Y. Yu ; School of Materials Science and Engineering, Shanghai University, China

Abstract

Canadian hematite acid pellet with low magnetite and olivine contents were isothermally reduced by hydrogen and carbon monoxide at 600 to 1 000 °C. Pellet reduction was investigated by a thermo gravimetric analysis measuring oxygen weight loss as a function of time. Then macroscopic and microscopic examinations, X-ray and carbon analyses were also used to elucidate the mechanisms of pellet reduction. Activation energy is around 27 kJ/mol for H₂ atmospheres and is about 15 kJ/mol for the mixture of H₂ and CO. Carbon producing from CO disproportionation reaction performs a catalyzer at the final reduction of pellet.

Keywords

iron; direct reduced; H₂-CO mixture; thermo gravimetric analysis; X-ray examination

Hrčak ID:

201560

URI

https://hrcak.srce.hr/201560

Publication date:

1.10.2018.

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