E-logpO2 diagrams for ironmaking by molten oxide electrolysis
Author(s)
Allanore, Antoine
Sadoway, Donald Robert
Azimi, Gisele
Date Issued
July 2017
Journal
Electrochimica Acta
Publisher
Elsevier
Citation
Judge, W. D., A. Allanore, D. R. Sadoway and G. Zaimi. "E-logpO2 diagrams for ironmaking by molten oxide electrolysis.' Electrochimica Acta 247 (2017): pp. 10889-1094.
Version
Author's final manuscript
Abstract
Molten oxide electrolysis is a promising approach to sustainable iron extraction, where direct electrolytic decomposition of iron ore proceeds to yield liquid metallic iron and pure oxygen gas. Here, through fundamental investigations, we constructed thermodynamic E-logpO2 diagrams for systems containing iron and its oxides to elucidate the chemistry of the electrolysis cell at various electric potentials and oxygen partial pressures. Two isotherms, 1473 and 1873K, were investigated, representing the conditions of the frozen electrolyte sidewall and molten oxide electrolyte in the electrolysis cell, respectively. Stability regions of solid and liquid oxides were determined and the effect of electric potential and oxygen partial pressure on their stoichiometry was explored. The results would enable further development of the electrolysis cell through providing a means for improving the design of the electrolyte to maximize current efficiency.
MIT Department
MIT Materials Research Laboratory
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.electacta.2017.07.059
