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Influence of different LCIA methods on an exemplary scenario analysis from a process development LCA case study

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Listed:
  • Daniel Koch

    (TU Wien)

  • Anton Friedl

    (TU Wien)

  • Bettina Mihalyi

    (TU Wien)

Abstract

Life cycle impact assessment (LCIA) methods quantify the impact of life cycle inventory data within each impact category by means of classification and characterization. This paper evaluated whether the selected LCIA method influenced the life cycle assessment (LCA) scenario analysis for decision support in process development and its possible reasons. For this study, a scenario analysis was used from a biorefinery LCA case study, as this is a key practice in process development. The analysis was investigated using various LCIA methods for the three midpoint impact categories of global warming potential (GWP, 12 LCIA methods totaling 48 subcategories), eutrophication potential (EP, 9 LCIA methods totaling 18 subcategories), and water assessment (WA, 10 LCIA methods totaling 26 subcategories). The GWP category showed consistent interpretations for the scenario analysis from different LCIA methods. The subcategory of marine EP from the two LCIA methods disagreed on the best-case scenario. Another discrepancy was identified within the three general EP indicators, where the trend of the scenario analysis was inverted in one method because of the sensitivity of a single substance (ethanol). Within the subcategories of WA, the inclusion or exclusion of hydropower water impacts changed the scenario analysis in the blue water use and total freshwater use subcategories, and the general WA indicators also disagreed on the best-case scenario. It is important to understand these influences and the reasons behind the variations for decision support in process development.

Suggested Citation

  • Daniel Koch & Anton Friedl & Bettina Mihalyi, 2023. "Influence of different LCIA methods on an exemplary scenario analysis from a process development LCA case study," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 25(7), pages 6269-6293, July.
    • Handle: RePEc:spr:endesu:v:25:y:2023:i:7:d:10.1007_s10668-022-02302-w
    DOI: 10.1007/s10668-022-02302-w
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    References listed on IDEAS

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    1. Scherer, Laura & Pfister, Stephan, 2016. "Global water footprint assessment of hydropower," Renewable Energy, Elsevier, vol. 99(C), pages 711-720.
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    3. Cosme, Nuno & Koski, Marja & Hauschild, Michael Z., 2015. "Exposure factors for marine eutrophication impacts assessment based on a mechanistic biological model," Ecological Modelling, Elsevier, vol. 317(C), pages 50-63.
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