February 2026
The PEM Circle project is developing digital solutions to overcome barriers to the circular economy. The use case here is the proton exchange membrane (PEM) electrolysis stack, which is used for hydrogen production. The aim is to provide a direct, ecologically and economically sound basis for decision-making when choosing between the R-strategies – repair, remanufacturing and recycling – and to address key challenges such as a lack of condition data, high material costs and limited availability of raw materials. To develop a sound basis for decision-making, the missing data must be determined using new sensor technology, smart software must be coordinated for the interface between the sensor technology and the remaining service life prediction tool, and sustainability information must be supplemented. Thanks to sophisticated sensor technology, the condition of individual components can be monitored with precision; supported by digital twins, this forms the basis for comprehensive repair management. An integrated software architecture links sensor technology, models and decision-making logic via standardised interfaces, thereby creating a consistent flow of information that serves as the foundation for digital repair and lifecycle management. A further objective is the development of digitally controlled, holistic recycling pathways for the R-strategies, so that implementation can be simplified for other applications. By applying the R-strategies, usage cycles can be extended, critical raw materials used more efficiently and raw material costs reduced. At the same time, the high investment costs of electrolysers can be amortised over a longer period due to the extended service life. The approaches developed for applying the R-strategies contribute to the development and strengthening of circular business models in the field of hydrogen technologies.
Katja Wendler -425
Ramona Simon -624
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