| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Towards a Future of Sustainable Production and Processing of Metals and Alloys
|
| Presentation Title |
Phase-field Modeling of Iron Oxide Reduction with Hydrogen: Role of Porosities |
| Author(s) |
Kartik Sunil Umate, Yang Bai, Dierk Raabe |
| On-Site Speaker (Planned) |
Kartik Sunil Umate |
| Abstract Scope |
Hydrogen-based direct reduction of iron oxide (HyDRI) has garnered significant interest due to its potential to significantly decrease CO2 emissions as an alternative to conventional steel making which accounts for ~7% of worldwide emissions. The porosity inherited from the sintering of fine ores into pellets and its further evolution during reduction affect kinetics of reduction significantly. To incorporate the phase transformation, chemical reactions, diffusion, vacancy production and clustering leading to nanopore formation, and coarsening of porous microstructures, a multiphysics phase-field model is formulated utilizing the principles of chemo-mechanics theory. The developed PF model is able to successfully simulate porosity evolution in classical core-shell type iron oxide pellets and samples with complex microstructures characterized using Scanning Transmission Electron Microscopy imaging. The findings indicate that evolution of porosity is highly sensitive to local reaction kinetics. Furthermore, the presence of accumulated water within closed pores has been observed to impede the reaction progress. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
ICME, Iron and Steel, Computational Materials Science & Engineering |