Assessment of hydrogen direct reduction for fossil-free steelmaking
| Autor: | Valentin Vogl, Max Åhman, Lars J Nilsson |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
020209 energy
Strategy and Management decarbonisation Scrap 02 engineering and technology 010501 environmental sciences 7. Clean energy 01 natural sciences Industrial and Manufacturing Engineering fossil-free Steel mill Hydrogen economy 0202 electrical engineering electronic engineering information engineering steel Zero emission 0105 earth and related environmental sciences General Environmental Science Hydrogen production Waste management Renewable Energy Sustainability and the Environment business.industry Steelmaking Renewable energy hydrogen Environmental science Electricity business |
| Zdroj: | Journal of Cleaner Production |
| ISSN: | 0959-6526 |
| Popis: | Climatepolicy objectivesrequire zero emissions across all sectors includingsteelmaking. The fundamental process changes needed for reaching this target are yet relatively unexplored. In this paper, we propose and assess a potential design for a fossil-freesteelmaking processbased ondirect reductionofiron orewith hydrogen. We show that hydrogen direct reduction steelmaking needs 3.48 MWh of electricity per tonne ofliquid steel, mainly for theelectrolyserhydrogen production. Ifrenewableelectricity is used the process will have essentially zero emissions. Total production costs are in the range of 361–640 EUR per tonne of steel, and are highly sensitive to the electricity price and the amount of scrap used. Hydrogen direct reduction becomes cost competitive with anintegrated steel plantat a carbon price of 34–68 EUR per tonne CO2 and electricity costs of 40 EUR/MWh. A key feature of the process is flexibility in production and electricity demand, which allows for grid balancing through storage of hydrogen and hot-briquetted iron, or variations in the share of scrap used. |
| Databáze: | OpenAIRE |
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