This project will develop a catalytic Nanosecond Pulsed Discharge plasma reactor for upgrading of CH4 into C2H4 with energy requirement competitive with the state-of-the-art industrial benchmark (600 kJ/molC2H4). The reactor configuration entails a plasma discharge for CH4 activation followed by a catalytic step where acetylene (C2H2) hydrogenation into C2H4 enhances the process throughput. The catalytic reaction following the plasma discharge-activation will be performed by a bimetallic hydrogenation catalyst deposited on a 3D-printed Periodic Open Cell Structure, which also serves as ground electrode. Heat integration between the plasma zone and the catalytic region allows operation without external heating, thus increasing the energy efficiency of the system. The same approach will be used for the direct conversion of a biogas stream of CH4 and CO2 into syngas to showcase the versatility of the system that can represent a blueprint for modular, catalytic plasma reactors.