About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Towards a Future of Sustainable Production and Processing of Metals and Alloys
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Presentation Title |
Visualizing the Atomic Scale Diffusional Mechanisms during Reduction of Epitaxial and Single Crystalline Iron Oxides with Hydrogen |
Author(s) |
Arun Devaraj, Francelia Sanchez, Zehao Li, Semanti Mukhopadhyay, Tingkun Liu, sten Lambeets, Jack Grimm, Ewa Ronnebro, Yingge Du, Ramana Chintalapalle, Tiffany Kaspar |
On-Site Speaker (Planned) |
Arun Devaraj |
Abstract Scope |
Fossil fuel-based carbothermal reduction of iron ore to iron emits more than 1.8 tons of CO2 per ton of Iron produced. With the increasing threat of global climate change, eliminating this large quantity of CO2 emissions from iron and steelmaking has become a high priority across the globe. Hydrogen-assisted direct reduction of iron oxides is an option to achieve this decarbonization goal. However, efficient reduction of iron oxides with hydrogen is a challenge, especially when there are undesirable impurities and complex morphological and structural defects in the iron ore, and the atomic scale diffusional mechanisms driving the reduction process are still poorly understood. Hence, we used single crystals and epitaxial thin films of Fe2O3 and Fe3O4 with and without 18O isotopic tracer layers and analyzed the diffusional mechanisms and phase transformations during deuterium reduction using atom probe tomography, transmission electron microscopy, X-Ray photoelectron spectroscopy, and X-Ray Diffraction. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Extraction and Processing, |