MERCURIA is a research project focused on developing a hybrid technology that integrates renewable energy storage and CO₂ capture through Power-to-Gas (PtG) systems. The aim is to produce synthetic, carbon-neutral methane by combining renewable hydrogen from electrolysis with CO₂ from biomass oxy-combustion. This approach addresses key challenges in the energy transition, such as balancing intermittent renewable electricity (solar and wind), reducing CO₂ emissions, and enabling large-scale energy storage. The project targets the design, construction, and experimental testing of a lab-scale methanation reactor. It will assess CH₄ production under various operating conditions, energy efficiency, gas quality, and potential industrial applications in residential, transport, and industrial sectors.