Comparative energy, emissions and economic assessment of low-carbon iron and steel making processes using imported liquid organic hydrogen carrier options

Eveloy, Valerie ; Kannan, Pravin ; Romeo, Luis M. (Universidad de Zaragoza)

Resumen: Hydrogen (H2)-based steel making is expected to become a major driver of intercontinental low-carbon H2 imports. Eight H2 supply scenarios based on either local H2 production at major steel producing locations (Germany/Japan), or liquid H2 carrier (dibenzyltoluene/perhydrodibenzyltiluene, DBT/PDBT) import from the United Arab Emirates, and their integration with H2 direct reduced iron (H-DRI) and electric arc furnace (EAF) processes, are investigated using process modeling. Solar energy-based PDBT import using surplus heat for dehydrogenation is the most cost-competitive H2 import scenario in Germany's case (levelized steel production cost, ∼685 $/tLS, with carbon emissions, ∼237 kgCO2/tLS). In Japan's case this scenario is the most economically favorable of all scenarios (∼736 $/tLS), with emissions (∼350 kgCO2/tLS) comparable to natural gas-DRI-EAF with 50% carbon capture. Steam methane reforming with carbon capture-based PDBT import is neither environmentally nor economically viable. PDBT-based H-DRI-EAF production cost is sensitive to electricity, H2 production, dehydrogenation energy, and carbon costs.

Idioma: Inglés

DOI: 10.1016/j.ijhydene.2024.09.372

Año: 2024

Publicado en: International Journal of Hydrogen Energy 89 (2024), 1321-1341
ISSN: 0360-3199

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Máquinas y Motores Térmi. (Dpto. Ingeniería Mecánica)