The strategic ambitions of the Max Planck Institute for Chemical Energy Conversion (MPI-CEC) and the Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA) are aligned with respect to research and innovation for the sustainable energy transition. A common aim is to strengthen the European leadership in clean energy technologies, and to support the emerging European hydrogen industry. Both organizations see Power-to-X as a very promising solution to convert large amount of intermittent renewable energy into hydrocarbon molecules, and to close the carbon loop of greenhouse gas industrial emitters in the context of a circular economy. The CatVIC project (Catalytic Valorization of Industrial Carbon) addresses the topic “Conversion and storage of energy from renewable sources” of the French-German joint call for proposal on sustainable energy. The project targets the development of a highly innovative Power-to-X system, based on green hydrogen production using high-temperature electrolysis technology, and on advanced catalytic options for the valorization of inevitable CO2 emissions from energy-intensive industries. The CatVIC project (Catalytic Valorization of Industrial Carbon) addresses the topic “Conversion and storage of energy from renewable sources” of the French-German joint call for proposal on sustainable energy. The project targets the development of a highly innovative Power-to-X system, based on green hydrogen production using high-temperature electrolysis technology, and on advanced catalytic options for the valorization of inevitable CO2 emissions from energy-intensive industries. The CatVIC project will be devoted to scientific investigations and technological developments at laboratory scale (TRL 3-5). Techno-economic, socio-economic and environmental assessments will be performed in order to validate the feasibility and positive impact of the overall Power-to-X process with respect to multi-factorial considerations. The CatVIC project will be followed by the construction of a pilot plant (TRL 5-7) in a chemical industrial park integrating more than 15 different companies (Roches-Roussillon Chemical Platform, Péage-de-Roussillon, France) in order to demonstrate the cost-effective and carbon-mitigating operation of the innovative Power-to-X unit and to answer the Roches-Roussillon Chemical Platform needs in terms of commodity chemicals (methanol, olefins, hydrogen, …).