EASI-Fuel solar to methane integrated device: a versatile tool for solar to X process assessment Corentin Gabier 1 , Grégory Cwicklinski 1 , Isabelle Rougeaux 2 , Christine Cavazza 1 , Vincent Artero 1 , Jérôme Gauthier 3 , Muriel Matheron 2 1 Université Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie des Métaux, 38000 Grenoble, France, 2 Université Grenoble Alpes, CEA, LITEN, DTNM, 38000 Grenoble, France, 3 Université Paris-Saclay, CEA, List, F-91120, Palaiseau, France Sunlight-to-X devices offer key advantages over traditional renewable synthetic molecules production processes (for hydrogen, fuels, fertilizers…), such as grid resilience and modularity. 1 However, challenges remain to reach practical deployment, especially regarding scalability and stability. To trigger progress in maturity level of such technologies, the EIC proposed an innovation prize on artificial photosynthesis, where integrated devices, producing a fuel from water and CO 2 as feedstocks, had to run autonomously in a real outdoor environment for 72 h. 2 As participants, we assembled a solar to methane demonstrator, reaching a solar to fuel efficiency of 5 % with an active area of 342 cm², overcoming challenges related to upscale and process integration. 3-5 In this contribution, we focus on the development of such a demonstrator into a versatile instrument for the characterization of various solar to X pathways. The goal is to highlight, characterize and solve the integration challenges to reach efficient and flexible photon to molecule conversion routes. This includes not only hardware assembly but also relevant data collection, storage and exploitation in order to derive meta models of the various conversion bricks. References 1. Lubbe et al. Current Opinion in Green and Sustainable Chemistry. 2023 Feb 1;39:100732 https://doi.org/10.1016/j. cogsc.2022.100732 2. European Commission: Directorate-General for Research and Innovation, Artificial photosynthesis – Fuel from the sun – EIC Horizon Prize , Publications Office of the European Union, 2018,https://data.europa.eu/doi/10.2777/063322 3. Maragno et al ., Joule, 2024, 8, 2325 https://doi.org/10.1016/j.joule.2024.05.012
4. Cwicklinski et al ., Sustainable Energy Fuels, 2024, 8, 1068 https://doi.org/10.1039/D3SE01550E 5. Maragno et al ., Sustainable Energy Fuels, 2024, 8, 3726 https://doi.org/10.1039/D4SE00547C
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