In Italy, the CO2 is filtered from ambient air and is methanated catalytically together with renewable hydrogen (Power-to-Gas) and then liquefied and used to fuel natural gas vehicles or other end device applications.
The project will demonstrate an innovative, large-volume energy storage technology to balance fluctuating and intermittent renewable energy. Making use of the excess on-site photovoltaic energy, an alkaline electrolyser (200 kW) locally generates 240 cubic meters of renewable hydrogen per hour. The DAC plant from Climeworks (Direct Air Capture) using CO2 from ambient air for the methanation was installed in July 2018 and the demosite now starts operating. The captured CO2 and renewable hydrogen generated on-site are catalytically methanated (PtG) in modular reactors by the French company ATMOSTAT. The waste heat retrieved from the reactors’ cooling circuits is extracted for the operation of Climeworks’ DAC facility. The methane is then liquefied and used to fuel natural gas tanks.
The primary objective of the STORE&GO project is to demonstrate the viability of large-volume energy storage through PtG technology in real-life applications. To this end the technology will be tested and operated for about 4,000 hours in the next 17 month of the project.
Aside from ATMOSTAT and Climeworks, industrial partners of the Italian part of the STORE&GO project are ENGINEERING, who are coordinating the activities at the demosite in Italy, HYSYTECH, IREN Energia SPA and studio BFP. Supported by their research partners from CEA and Politecnico di Torino.