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Hybridization of complete PLCA and MRIO databases for a comprehensive product system coverage

Maxime Agez, Richard Wood, Manuele Margni, Anders H. Strømman, Réjean Samson and Guillaume Majeau-Bettez

Article (2020)

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Cite this document: Agez, M., Wood, R., Margni, M., Strømman, A. H., Samson, R. & Majeau-Bettez, G. (2020). Hybridization of complete PLCA and MRIO databases for a comprehensive product system coverage. Journal of Industrial Ecology, 24(4), p. 774-790. doi:10.1111/jiec.12979
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Abstract

Process‐based Life Cycle Assessments (PLCA) rely on detailed descriptions of extensive value chains and their associated exchanges with the environment, but major data gaps limit the completeness of these system descriptions and lead to truncations in inventories and underestimations of impacts. Hybrid Life Cycle Assessments (HLCA) aim to combine the strength of PLCA and Environmentally Extended Input Output (EEIO) analysis to obtain more specific and complete system descriptions. Currently, however, most HLCAs only remediate truncation of processes that are specific to each case study (foreground processes), and these processes are then linked to (truncated) generic background processes from a non‐hybridized PLCA database. A hybrid PLCA‐EEIO database is therefore required to completely solve the truncation problems of PLCA and thus obtain a comprehensive product system coverage. This paper describes the construction of such a database using pyLCAIO, a novel framework and open‐source software enabling the streamlined hybridization of entire PLCA and EEIO databases. We applied this framework to the PLCA database Ecoinvent3.5 and the multiregional EEIO database EXIOBASE 3. Thanks to the correction for truncation in this new hybrid database, the median and average life cycle global warming potential (GWP) of its processes increased by 7% and 14%, respectively. These corrections only reflect the truncations that could be readily identified and estimated in a semi‐automated manner; and we anticipate that further database integration should lead to higher levels of correction in the future.

Uncontrolled Keywords

Database; Environmentally extended input output (EEIO) analysis; Hybrid life‐cycle assessment; Process‐based life cycle assessments (PLCA); Software; Truncation error

Open Access document in PolyPublie
Subjects: 1500 Génie de l'environnement > 1500 Génie de l'environnement
1600 Génie industriel > 1600 Génie industriel
1600 Génie industriel > 1602 Systèmes d'information de gestion
Department: Département de génie chimique
Département de mathématiques et de génie industriel
Research Center: CIRAIG - Centre international de référence sur le cycle de vie des produits, procédés et services
Funders: International Chair in Life Cycle Assessment
Date Deposited: 13 Nov 2020 11:49
Last Modified: 28 Sep 2021 13:30
PolyPublie URL: https://publications.polymtl.ca/5487/
Document issued by the official publisher
Journal Title: Journal of Industrial Ecology (vol. 24, no. 4)
Publisher: Wiley
Official URL: https://doi.org/10.1111/jiec.12979

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