doi:10.1016/j.energy.2023.127616engPerpiñán, JorgeBailera, ManuelPeña, BegoñaRomeo, Luis M.Eveloy, ValerieTechnical and economic assessment of iron and steelmaking decarbonization via power to gas and amine scrubbingART-2023-133887The 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.2023http://zaguan.unizar.es/record/12647410.1016/j.energy.2023.127616http://zaguan.unizar.es/record/126474oai:zaguan.unizar.es:126474info:eu-repo/grantAgreement/EC/H2020/887077/EU/Decarbonisation of carbon-intensive industries (Iron and Steel Industries) through Power to gas and Oxy-fuel combustion/DISIPOThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 887077-DISIPOinfo:eu-repo/grantAgreement/ES/MICINN/PID2021-126164OB-I00/AEI/10.13039/501100011033info:eu-repo/grantAgreement/ES/UZ/UZ2020-TEC-06Energy 276 (2023), 127616 [15 pp.]by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess