147686 20260217205607.0 doi 10.1016/j.jclepro.2024.144366 sideral 141103 ART-2024-141103 eng Sáez de Guinoa Sentre, Javier Universidad de Zaragoza Eco-efficiency assessment of carbon capture and hydrogen transition as decarbonisation strategies in alumina production 2024 Access copy available to the general public Unrestricted Studies seeking to thoroughly couple the environmental and economic performances of a process or product are becoming more prominent as the needs for decarbonisation grow. This study explores the use of Life Cycle Assessment (LCA) and Life Cycle Costing (LCC) in the alumina extraction industry. Models for various thermal energy supply methods and CO2 mitigation strategies were developed to obtain an inventory for analysis and the environmental impacts and life-cycle costs of the supply chain were evaluated. Finally, economic and ecological results were integrated using eco-efficiency indices and a sensitivity analysis of the most significant variables detected was conducted. The research indicated that the integration of a calcium-looping plant to capture post-combusted CO2 could reduce 55.5% of the CO2 equivalent emissions, while also obtaining a better economic performance due to the CO2 avoided taxes. However, other environmental indicators had slightly more significant impacts because of the additional use of natural gas. The potential use of green hydrogen instead of natural gas could enable a 70.0% reduction in CO2 equivalent emissions, as well as a reduction in all other environmental indicators studied, except for water consumption. However, transitioning to green hydrogen production could incur higher costs. This study introduced an eco-efficiency ratio index, indicating that CO2 capture and storage proved to be the most eco-efficient scenario, regardless of economic fluctuations in CO2 emission taxes. The substitution of natural gas with green hydrogen also emerged as a viable eco-efficient solution, provided electricity prices remain below 0.045€/kWh. info:eu-repo/grantAgreement/ES/DGA/T46-23R info:eu-repo/grantAgreement/EC/H2020/820911/EU/AlSiCal/Towards sustainable mineral and metal industry: ZERO Bauxite Residue and ZERO CO2 from co-production of Alumina, Silica and precipitated Calcium carbonate by the Aranda-Mastin technology This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 820911-AlSiCal info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 10.0 2024 ENGINEERING, ENVIRONMENTAL 9 / 83 = 0.108 2024 Q1 T1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY 12 / 103 = 0.117 2024 Q1 T1 ENVIRONMENTAL SCIENCES 23 / 376 = 0.061 2024 Q1 T1 2.174 2024 Environmental Science (miscellaneous) 2024 Q1 Strategy and Management 2024 Q1 Renewable Energy, Sustainability and the Environment 2024 Q1 Industrial and Manufacturing Engineering 2024 Q1 20.7 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Senante, Inés Universidad de Zaragoza Pascual, Sara Universidad de Zaragoza Llera-Sastresa, Eva Universidad de Zaragoza (orcid)0000-0002-6103-7136 Romeo, Luis M. Universidad de Zaragoza (orcid)0000-0001-7379-6159 5004 590 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Máquinas y Motores Térmi. 485 (2024), 144366 [11 pp.] J. clean. prod. Journal of Cleaner Production 0959-6526 2709751 http://zaguan.unizar.es/record/147686/files/texto_completo.pdf Versión publicada 2662408 http://zaguan.unizar.es/record/147686/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:147686 articulos driver 2026-02-17-20:47:22 ARTICLE