Isothermal kinetic analysis on reduction of solid/liquid wustite by hydrogen

Jianliang Zhang; Yang Li; Zhengjian Liu; Tengfei Wang; Yaozu Wang; Kejiang Li; Guilin Wang; Tao Xu; Yong Zhang

doi:10.1007/s12613-022-2518-0

Volume 29 Issue 10

Oct. 2022

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2022 > 29(10): 1830-1838

Jianliang Zhang, Yang Li, Zhengjian Liu, Tengfei Wang, Yaozu Wang, Kejiang Li, Guilin Wang, Tao Xu, and Yong Zhang, Isothermal kinetic analysis on reduction of solid/liquid wustite by hydrogen, Int. J. Miner. Metall. Mater., 29(2022), No. 10, pp. 1830-1838. https://doi.org/10.1007/s12613-022-2518-0

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Jianliang Zhang, Yang Li, Zhengjian Liu, Tengfei Wang, Yaozu Wang, Kejiang Li, Guilin Wang, Tao Xu, and Yong Zhang, Isothermal kinetic analysis on reduction of solid/liquid wustite by hydrogen, Int. J. Miner. Metall. Mater., 29(2022), No. 10, pp. 1830-1838. https://doi.org/10.1007/s12613-022-2518-0

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Research Article

Isothermal kinetic analysis on reduction of solid/liquid wustite by hydrogen

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Corresponding authors:
Zhengjian Liu E-mail: liuzhengjian@ustb.edu.cn

Yaozu Wang E-mail: wgyozu@163.com
Received: 8 March 2022; Revised: 31 May 2022; Accepted: 6 June 2022; Available online: 8 June 2022

Abstract

Abstract

Isothermal thermogravimetric analysis was used to study the reduction process of solid/liquid wustite by hydrogen. Results show that wustite in both states can be reduced entirely at all temperatures. The thermal and kinetic conditions for the hydrogen reduction of molten phases are better than those when the reactants and products are in the solid state, with a higher reaction rate. The hydrogen reduction of different wustite phases fits the Mampel Power model (power exponent n = 1/2) well, and this model is independent of the phase state. The average apparent activation energies of the reduction process calculated by the iso-conversional method are 5.85 kJ·mol⁻¹ and 104.74 kJ·mol⁻¹, when both reactants and products are in the solid state and the molten state, respectively. These values generally agree with those calculated by the model fitting method.
- hydrogen metallurgy;
- iron oxide;
- smelting reduction;
- reduction kinetics

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