Life cycle inventory analysis - A case study of steel used in Brazilian automobiles |
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Authors: | Email author" target="_blank">Cáassia?M?L?UgayaEmail author Arnaldo?C?S?Walter |
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Institution: | (1) ArcelorMittal R&;D, Voie Romaine, BP30320, Maizieres-les-Metz, 57283, France;(2) LSG2M, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy cedex, France |
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Abstract: | Data acquisition to perform LCA is time and capital consuming. There is already international data about environmental aspects
in several processes. This study aims to verify the possibility of adapting international data to Brazilian conditions. Therefore,
a Life Cycle Inventory was conducted to compare the use of national and international data for steel used in automobiles.
This was done in three steps: objective and scope definition, inventory analysis and interpretation. LCI is a simplification
of Life Cycle Assessment (LCA) as impact assessment is not taken into account. Even so, LCI takes into account all life cycle
stages of a product, that is, from its extraction through its deposition. In this study, three phases of the life cycle were
considered: steel manufacturing, automobile use and disposal. In the case studied, the amount of steel evaluated was 263 kg,
which would be possible to be replaced by other materials in a 1,300 kg automobile. Resources and energy consumption, atmospheric
emissions and solid residues production were taken into account within the analysis done. Results show that automobile use
and materials manufacturing are responsible for the bulk of energy and resources consumption. Solid residues occur mainly
in the discard phase, due to the low level of recycling. Several differences were also achieved between national and international
data, which implies the need of environmental databases development. |
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Keywords: | Automobile life cycle assessment steel recycling |
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