RT Journal Article
T1 Kinetic study of Cu2S–FeS mixtures in an oxidative environment by thermogravimetric and thermodynamic analysis
A1 Vázquez Vázquez, Mercedes
A1 Díaz Blanco, Manuel Jesús
A1 Parra Figueroa, Roberto
A1 Balladares Varela, E. R.
A1 Jerez Riveros, O.
A1 Cuevas Cerda, M.
A1 Moreno-Ventas Bravo, Ignacio
AB Two samples of Cu2S–FeS mixtures were prepared in order to study the thermal oxidation evolution of the raw materials used during the first and second sub-stages of slag blowing in a converter furnace. To determine the thermal evolution in an oxidative environment, thermogravimetric analysis (TGA) was performed on both samples at four linear heating ramps (5, 10, 15 and 20 ◦C min 1), obtaining similar curves in both cases. Of the methods studied, Friedman, Coats-Redfern, Flynn-Wall-Ozawa and Kissinger-Akahira-Sunose, the latter was found to be the most suitable to represent the oxidative evolution of Cu2S–FeS mixtures. The kinetic parameters calculated using Kissinger-Akahira-Sunose method are highly dependent on the degree of conversion. The results obtained for the activation energy ranging between 10 and 20 Kj mol 1 for conversion rates of 0.2, and between 30 and 50 Kj mol 1 for conversion rates of 0.9. In addition, a thermodynamic computational model was developed to determine the reactions taking place during the oxidation of the Cu2S–FeS mixtures
PB Elsevier
SN 0254-0584
SN 1879-3312 (electrónico)
YR 2024
FD 2024-01
LK https://hdl.handle.net/10272/23259
UL https://hdl.handle.net/10272/23259
LA eng
NO Vázquez Vázquez, M., Díaz Blanco, M. J., Parra Figueroa, R. A., Balladares Varela, E. R., Jerez Riveros, O., Cuevas Cerda, M., & Moreno-Ventas Bravo, I. (2024). Kinetic study of Cu2S–FeS mixtures in an oxidative environment by thermogravimetric and thermodynamic analysis. In Materials Chemistry and Physics (Vol. 311, p. 128548). Elsevier BV. https://doi.org/10.1016/j.matchemphys.2023.128548
NO This work was carried out with financial support from the Research and Transfer Policy Strategy of the University of Huelva (Call for Industrial Doctorate grants at the University of Huelva). The authors also wish to thank the GEA Institute of the Universidad de Concepci´ on, Chile, whose facilities were made available to us to carry out a significant part of the experimental work performed
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026