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SOCIAL LIFE CYCLE ASSESSMENT OF A SOLID OXIDE ELECTROLYSIS CELL STACK

Publicado en:Proceedings Of Whec 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents By H2. 1490-1492 - 2022-01-01 (), DOI:

Autores: Campos-Carriedo F; Puig-Samper G; Bargiacchi E; Iribarren D; Dufour J

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Resumen

The relevance of Fuel Cells and Hydrogen (FCH) systems as decarbonisation solutions has grown significantly during the past decade. However, a sustainable life-cycle performance of FCH systems should be guaranteed. In this sense, while the focus is typically placed on their economic and environmental performance, scarce attention is usually paid to the social dimension, which should be assessed to avoid burden shifting. In this work, a Social Life Cycle Assessment (S-LCA) of a 5 kW Solid Oxide Electrolysis Cell (SOEC) stack was carried out within the context of the eGHOST project. The system boundaries include the extraction of materials, the manufacturing of components and the final assembly of the stack parts (balance of plant excluded). Design parameters such as current density, degradation and lifetime were defined considering 2030 targets, when this type of electrolysers is expected to be commercially mature. Inventory data (including working hours) were adapted accordingly from literature sources, while trade information from the UN Comtrade database was used for the regionalisation of the supply chain. Modelling and evaluation were performed using openLCA and the PSILCA database and method. Overall, stainless steel production in Spain arose as the main social hotspot under most of the evaluated indicators.

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