About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Materials Science
|
| Presentation Title |
Scaling lessons from ammonia-based reduction of iron oxide |
| Author(s) |
Catherine Marie Schrader, Sanya Mittal, Luke Davis |
| On-Site Speaker (Planned) |
Catherine Marie Schrader |
| Abstract Scope |
Producing iron for steel generates ca. 2 Gt/year of CO2, 4% of global emissions. High energy density and established transportation infrastructure make ammonia a promising reductant for decarbonizing ironmaking. Ammonia reduces iron oxides to metallic iron with nitrogen and water as the primary byproducts. Building on our reported energy- and ammonia-efficient conditions for this reaction we investigated high-efficiency ammonia-based ironmaking at larger scales using iron oxide powders and iron ore pellets. Reactor geometry, powder bed thickness, and ammonia flow rate strongly influence gas transport and reduction for powders. In the same furnace, reduction of multi-gram powder samples in 1 min required operating at decreased ammonia utilization, as low as 16% (compared with 56% in our earlier work). Reduction of ore pellets is comparatively insensitive to scale, allowing for high single-pass ammonia utilization (>40%). The findings provide key technical data for scaling up iron ore reduction with ammonia. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Iron and Steel, Powder Materials |