Technical and economic assessment of iron and steelmaking decarbonization via power to gas and amine scrubbing

Jorge Perpiñán, Manuel Bailera, Begoña Peña, Luis M. Romeo, Valerie Eveloy

    Research output: Contribution to journalArticlepeer-review

    16 Scopus citations

    Abstract

    The iron and steel industry is one of the most energy-intensive industries, emitting 5% of the total anthropogenic carbon dioxide (CO2). The control of CO2 emissions has become increasingly stringent in the European Union (EU), resulting in EU allowance above 90 €/tCO2. Carbon capture will be required to achieve CO2 emissions control, and carbon utilization via power-to-gas could significantly increase interest in carbon capture in the iron and steel sector. This paper presents a new concept that combines amine scrubbing with power-to-gas to reduce emissions in blast furnace-basic oxygen furnace steelmaking plants. Synthetic natural gas (SNG) is produced using green hydrogen from water electrolysis and CO2 from steelmaking. The synthetic natural gas is later used as a reducing agent in the blast furnace, constantly recycling carbon in a closed loop and avoiding geological storage. The oxygen by-produced via electrolysis eliminates the necessity of an air separation unit. By applying these innovations to steelmaking, a reduction in CO2 emissions of 9.4% is obtained with an energy penalty of 16.2 MJ/kgCO2, and economic costs of 52 €/tHM or 283 €/tCO2. A sensitivity analysis with respect to electricity and the CO2 allowances prices is also performed.

    Original languageBritish English
    Article number127616
    JournalEnergy
    Volume276
    DOIs
    StatePublished - 1 Aug 2023

    Keywords

    • CO2 capture
    • Decarbonization
    • Iron and steel industry
    • Ironmaking
    • Methanation
    • Power-to-gas

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