Comparative life cycle analysis of electrolyzer technologies for hydrogen production: Manufacturing and operations

Summary This study conducts a comprehensive life cycle assessment (LCA) of four electrolyzer technologies: alkaline electrolyzer (AEL), proton-exchange membrane (PEM), anion-exchange membrane (AEM), and solid oxide electrolyzer (SOE). It evaluates their environmental impacts across four main categories: climate change (CC), human health (HH), ecosystem quality (EQ), and abiotic stock resources (ASRs). In order to highlight the critical raw materials (CRMs) used in their manufacturing processes, the research identifies potential material replacements and reveals distinct environmental impacts associated with material choices, such as steel in AEL and AEM, platinum in PEM, and nickel in both SOE and AEL.…