Issue 17, 2024

Exploring the oxidation behavior of undiluted and diluted iron particles for energy storage: Mössbauer spectroscopic analysis and kinetic modeling

Abstract

Iron is an abundant and non-toxic element that holds great potential as energy carrier for large-scale and long-term energy storage. While from a general viewpoint iron oxidation is well-known, the detailed kinetics of oxidation for micrometer sized particles are missing, but required to enable large-scale utilization for energy production. In this work, iron particles are subjected to temperature-programmed oxidation. By dilution with boron nitride a sintering of the particles is prevented enabling to follow single particle effects. The mass fractions of iron and its oxides are determined for different oxidation times using Mössbauer spectroscopy. On the basis of the extracted phase compositions obtained at different times and temperatures (600–700 °C), it can be concluded that also for particles the oxidation follows a parabolic rate law. The parabolic rate constants are determined in this transition region. Knowledge of the particle size distribution and its consideration in modeling the oxidation kinetics of iron powder has proven to be crucial.

Graphical abstract: Exploring the oxidation behavior of undiluted and diluted iron particles for energy storage: Mössbauer spectroscopic analysis and kinetic modeling

Supplementary files

Article information

Article type
Paper
Submitted
22 júl. 2023
Accepted
14 feb. 2024
First published
10 apr. 2024
This article is Open Access
Creative Commons BY-NC license

Phys. Chem. Chem. Phys., 2024,26, 13049-13060

Exploring the oxidation behavior of undiluted and diluted iron particles for energy storage: Mössbauer spectroscopic analysis and kinetic modeling

J. Spielmann, D. Braig, A. Streck, T. Gustmann, C. Kuhn, F. Reinauer, A. Kurnosov, O. Leubner, V. Potapkin, C. Hasse, O. Deutschmann, B. J. M. Etzold, A. Scholtissek and U. I. Kramm, Phys. Chem. Chem. Phys., 2024, 26, 13049 DOI: 10.1039/D3CP03484D

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