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6286 |
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Tuesday, May 04, 2021, Hall 1 9:15 AM Opening |
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Carbon footprint study of aluminium brazing sheet |
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Kent Schölin* / Gränges AB, Sweden Sofia Hedevag / Granges AB, Sweden |
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Aluminium is generally regarded as a green material based on its recyclability, light weight, corrosion resistance, barrier properties etc. However, production of primary aluminium is energy intensive due to aluminium’ s strong affinity to oxygen and the process required to split aluminium from said oxygen. Re-melting of recycled aluminium requires only 5 % of the energy compared to primary aluminium production, but to maximize value of the aluminium to be re-melted a good sorting of different aluminium alloys is required. Determining the carbon footprint of an aluminium brazing sheet requires a set of allocation principles to be put in place. It also requires a set of choices to me made regarding data and data sources to be used. The choice of raw material will have a fundamental impact on the carbon footprint for an aluminium product, which is of course also valid for an aluminium brazing sheet. This paper introduces the concepts of carbon footprint calculations for aluminium brazing sheet products and the importance of raw material choice. It also discusses the implications of sorting of recycled aluminium and the need for dynamic sorting methods. |