The actions described in this cluster of projects aim to capture CO2 from industrial fumes and ambient air, convert it to e-fuel de-fossilised fuels and use it in combustion units. This project concerns more specifically the study of the integration of the different technological bricks within a carbon circularity scheme. The project is based on an extensive coupling between a modeling study using a balance sheet approach and an experimental study aimed in particular at the capture of CO2 in the air and the conversion of CO2 into e-fuel. It will contribute to the development of experimental devices financed under the recovery plan of the Wallonia-Brussels Federation and will implement these equipment to answer research questions on the technical feasibility of a circular carbon economy.