Pegasus Project aims to demonstrate the operation on an industrial scale PtG system, one of the technologies that can contribute most to the increase of energy produced 100% from non-programmable renewable sources, for a progressive decarbonisation of the energy system.
The aim of the project is to produce 100% renewable methane gas (CH₄) on an industrial scale, through an integrated system of conversion of H₂O to H₂ through RES powered electrolysis and CO₂ supply from biomethane upgrading processes, with subsequent methanation and feeding into SGI transport network with access to all services of the gas system, i.e. export, storage, distribution and liquefaction (Figure 2).



Figura 2 - Power-to-Gas process (SGI)

The main objectives of Pegasus are:

- Validate the integrated management of the technologies now available (fermentation for biogas, electrolysation, and methanation) and address the operational challenges on a large-scale plant;

- Define the best cost level of green gas - using existing technologies - and indirectly set a cost benchmark for the service of seasonal accumulation of non-programmable RES;

- Identify R&D areas instrumental to enable the step to the next generation of PtG plants (GigaWatt scale) that aims to reach commercial maturity.

A pre-feasibility study analysed the key pre conditions for the realization of the project: optimal location of the plant and supply of CO₂ and renewable energy.  In addition, the evaluation of current available technologies has allowed to develop a concept that will lead to a significant advancement as well as a complete, qualified and reliable system. Moreover, it will strengthen the techno-scientific chain with a consequent increasing diffusion of such plants. 

In second half of 2018 SGI started a joint study and research activity with ENEA (the National Agency for New Technologies, Energy and Sustainable Economic Development), then formalized in March 2019 with the signing of a Cooperation Agreement (

Pegasus will also benefit from the cooperation of qualified industrial partners specialized in catalytic electrolysis processes, manufacturing of innovative technological components for CO₂ capture, development of solutions for energy production, RES generation.

The research and innovation triggered by this project will bring a fundamental contribution to the achievement of the stringent decarbonisation targets and contribute to address the problem of global warming.

in partnership with

Other Power-to-Gas projects in Europe:

For further information on the subject, please consult the GME newsletter no. 125 (April 19) at the following link: