Integration of power to gas and biomass charcoal in oxygen blast furnace ironmaking

Bailera, Manuel (Universidad de Zaragoza) ; Rebolledo, Boris

Resumen: The paper introduces a novel approach for mitigating CO2 emissions in blast furnaces by integrating top gas recycling, an oxy-fuel regime, power to gas, and biomass pyrolysis. Various case studies were conducted, involving the adjustment of pyrolysis temperatures (300 °C, 500 °C, 700 °C, and 900 °C) and varying the quantity of blast furnace gas directed to methanation for carbon recycling. Pinus radiata, abundant and cost-effective in Chile and Spain, was chosen as the biomass source. The integration was modeled using the extended operating line methodology and evaluated through 12 key performance indicators, such as flame temperature, coke consumption, CO2 emissions, and specific primary energy consumption per unit of CO2 avoided. Optimal performance was observed with pyrolysis at 700 °C and no blast furnace gas recycled through methanation. This configuration achieved a 58 % reduction in CO2 emissions, with an energy consumption of 9.8 MJ/kgCO2, and obviated the need for geological storage. Comparing this innovative proposal with other oxygen blast furnace approaches from the literature revealed a 13 percentage point improvement in CO2 reduction over the second-best alternative. Additionally, the required electrolysis capacity, influencing capital expenditure, was 57 % lower, and energy consumption was reduced by 44 %.

Idioma: Inglés

DOI: 10.1016/j.enconman.2023.117916

Año: 2024

Publicado en: ENERGY CONVERSION AND MANAGEMENT 300 (2024), 117916 [15 pp.]
ISSN: 0196-8904

Financiación: info:eu-repo/grantAgreement/EC/H2020/887077/EU/Decarbonisation of carbon-intensive industries (Iron and Steel Industries) through Power to gas and Oxy-fuel combustion/DISIPO
Financiación: info:eu-repo/grantAgreement/EUR/MICINN/TED2021-130000B–I00

Tipo y forma: Article (Published version)

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