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

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 larg...

Full description

Saved in:
Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2024-05, Vol.26 (17), p.1349-136
Main Authors: Spielmann, Jonas, Braig, Daniel, Streck, Antonia, Gustmann, Tobias, Kuhn, Carola, Reinauer, Felix, Kurnosov, Alexandr, Leubner, Oliver, Potapkin, Vasily, Hasse, Christian, Deutschmann, Olaf, Etzold, Bastian J. M, Scholtissek, Arne, Kramm, Ulrike I
Format: Article
Language:English
Subjects:
Boron nitride
Dilution
Energy storage
Iron
Kinetics
Modelling
Mossbauer spectroscopy
Oxidation
Particle size distribution
Phase composition
Rate constants
Reaction kinetics
Sintering (powder metallurgy)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. Measuring the composition at different stages of oxidation enables extracting the kinetics and highlighting differences and similarities of iron particles to bulk material.
ISSN:1463-9076
1463-9084
DOI:10.1039/d3cp03484d