000135980 001__ 135980
000135980 005__ 20250908131433.0
000135980 0247_ $$2doi$$a10.1016/j.rineng.2024.102456
000135980 0248_ $$2sideral$$a139017
000135980 037__ $$aART-2024-139017
000135980 041__ $$aeng
000135980 100__ $$aSáez-Guinoa, Javier
000135980 245__ $$aTechno-economic assessment of solar photovoltaic electrification and calcium looping technology as decarbonisation pathways of alumina industry
000135980 260__ $$c2024
000135980 5060_ $$aAccess copy available to the general public$$fUnrestricted
000135980 5203_ $$aAluminium industry stands out as a significant source of CO2 emissions, due partially to the high energy demand of the alumina extraction stage. Accordingly, this study explores the implementation of direct resistive heating of mid-temperature processes in alumina production as an alternative to decrease CO2 emissions. Additionally, two different strategies are evaluated to decarbonize alumina industry: the generation of renewable electricity through solar photovoltaic panels and the integration of a CO2 capture plant based on calcium looping technology. This work comprehends the modelling and sizing of these plants and the assessment of their economic performance through the calculation of their Net Present Value and their respective payback periods. The integration of both strategies into an alumina refinery model reveals that electrification of low and mid-temperature processes yields a 15 % reduction in CO2 direct emissions, whereas calcium looping demonstrates the potential to capture 97 % of emissions with a 7 % energy penalty. Also, economic assessments indicate substantial potential for improvement through in-site electricity generation via solar photovoltaic panels, exhibiting a payback time of 4.5 years. Conversely, the feasibility of a calcium-looping plant is hindered by high capital expenses, necessitating a longer payback period of 19–24 years. Sensitivity analyses underscore the suitability of in-site renewable electricity generation, whereas carbon emission taxes emerge as crucial in incentivizing carbon-neutral processes, with thresholds around 95–125 €/tonne of CO2. Despite potential deviations from real industrial settings, this study provides evidence for environmentally friendly strategies in alumina production that demonstrate limited adverse effects on economic performance.
000135980 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T46-23R$$9info: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$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 820911-AlSiCal
000135980 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000135980 592__ $$a1.171$$b2024
000135980 593__ $$aEngineering (miscellaneous)$$c2024$$dQ1
000135980 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000135980 700__ $$aSenante, Inés
000135980 700__ $$0(orcid)0000-0002-6103-7136$$aLlera-Sastresa, Eva$$uUniversidad de Zaragoza
000135980 700__ $$0(orcid)0000-0001-7379-6159$$aRomeo, Luis M.$$uUniversidad de Zaragoza
000135980 7102_ $$15004$$2590$$aUniversidad de Zaragoza$$bDpto. Ingeniería Mecánica$$cÁrea Máquinas y Motores Térmi.
000135980 773__ $$g23 (2024), 102456 [10 pp.]$$tResults in Engineering$$x2590-1230
000135980 8564_ $$s2307894$$uhttps://zaguan.unizar.es/record/135980/files/texto_completo.pdf$$yVersión publicada
000135980 8564_ $$s2145710$$uhttps://zaguan.unizar.es/record/135980/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000135980 909CO $$ooai:zaguan.unizar.es:135980$$particulos$$pdriver
000135980 951__ $$a2025-09-08-12:56:39
000135980 980__ $$aARTICLE