149125 20251017144548.0 doi 10.1016/j.resconrec.2018.04.006 sideral 105773 ART-2018-105773 eng Ortego, A. (orcid)0000-0002-6148-1253 Downcycling in automobile recycling process: A thermodynamic assessment 2018 Current metal recycling techniques for end-of-life vehicles (ELV) are based on mechanical treatments to mainly recover steel, aluminum, copper, and zinc alloys. Such techniques facilitate compliance with the ELV European Directive (2000/53/EC) target of achieving recyclability quotes of up to 85%. However, a vehicle can use more than 60 metals, some of them considered critical by international institutions, which end up downcycled as part of alloys or ultimately in landfills. This paper undertakes an assessment of the downcycling degree of minor metals in conventional vehicles using a SEAT Leon III model as a case study. Downcycling is assessed from a thermodynamic point of view using thermodynamic rarity, an indicator that is used as a weighting factor for the metals used in the car. The thermodynamic rarity of metals is a function of the quality of the minerals from which they stem, considering their relative abundance in Nature and the energy intensity required to extract and process them. The results demonstrated that, even if the quantity of downcycled metals only represents 4.5% of the total metal weight of the vehicle, in rarity terms, this figure increases to approximately 27%. This indicates that an important portion of high-quality metals becomes functionally lost. The most downcycled vehicle subsystems are in order: (1) accessories, (2) electrical and electronic equipment, (3) exhaust system, and (4) engine. Further, the most downcycled parts are: speed sensor, control unit, antenna amplifier, airbag circuit, temperature and rain sensors, front pipe, particle filter, and turbo parts. info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 7.044 2018 ENVIRONMENTAL SCIENCES 15 / 250 = 0.06 2018 Q1 T1 ENGINEERING, ENVIRONMENTAL 6 / 52 = 0.115 2018 Q1 T1 1.541 2018 Waste Management and Disposal 2018 Q1 Economics and Econometrics 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Valero, A. Universidad de Zaragoza (orcid)0000-0003-3330-1793 Valero, A. Universidad de Zaragoza (orcid)0000-0003-0702-733X Iglesias, M. 5004 590 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Máquinas y Motores Térmi. 136 (2018), 24-32 Resour. conserv. recycl. Resources, Conservation and Recycling 0921-3449 925236 http://zaguan.unizar.es/record/149125/files/texto_completo.pdf Postprint 2730412 http://zaguan.unizar.es/record/149125/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:149125 articulos driver 2025-10-17-14:10:47 ARTICLE