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Résofil no.12 - May-June 2017
Winter Outlook 2017-2018
Val de Saône-A program to ensure competitiveness and security  of supply in France

Power to Gas

At times, the electricity generated by wind farms on land or offshore, and by solar plants, cannot be fully consumed or exported.

Because there is no storage solution, the units are shut down, or the electricity is lost to avoid saturating the networks. The technological innovation featured in the Power to Gas demonstration plant provides a solution for storing and using the surplus electricity, by transforming it into gas.

How is that possible, you might ask?
Quite simply by transforming the electricity into hydrogen through water electrolysis. The hydrogen can then be combined with carbon dioxide (CO2) as and when necessary to obtain synthesized methane, via a methanation process.

The GRTgaz network is sized to accept part of the hydrogen and 100% of the synthesized methane. In all cases, the gas produced is fully neutral as regards its carbon footprint, because it replaces an equivalent amount of gas extraction and increases our energy independence.

Power to Gas: Production of gas in 2050 15 to 20 TWH/YEAR


Power to Gas : en 2030, production de 15 à 20 TWh/an

Power to Gas at the service of the energy transition

2030-2050 blueprint developed by the ADEME

Above all, Power to Gas is an exceptional lever for the energy transition, encouraging development of renewable energy sources.

On the basis of the 2030-2050 blueprint developed by the l’ADEME under which 50% of the electricity generated should stem from green sources, GRTgaz estimates that by 2050, the Power to Gas solution will produce between 15 and 20 TWh of renewable gases per year, which will be injected or stored in the network during periods with considerable excess production levels. Once the energy has thus been transformed into gas, it will benefit from all the strengths of natural gas transmission: economical, flexible, discreet and safe.

By helping to supply NGV with a neutral carbon footprint, Power to Gas makes an efficient contribution to the energy transition. The green gas thus produced, which emits lower levels of CO2 and particulates than petrol or diesel fuel, also constitutes a viable alternative to fossil fuels for transport, with the effect of reducing air pollution levels.

2030-2050 blueprint developed by the ADEME

A source of economic dynamism for the territories

Power to Gas provides many advantages for local authorities: gas production stimulates the implementation of infrastructure and industrial equipment in the departments, thus leading to production of industrial facilities, which in turn create activities and jobs in the areas concerned.


The first Power to Gas project linked to the French gas transmission network, called Jupiter 1000, will be put up at Fos-sur-Mer (Bouches-du-Rhône, 13). The demonstration plant is scheduled to come into service in 2018 with a power rating of 1 MWe. It will be the first installation on that scale in France.

The launch of a Power to Gas demonstration plant does not involve ground-breaking technology that requires many long years of development. The feedback from experience and the studies stemming from analysis of existing plants will enable refinement of the model via the Jupiter 1000 project, leading to considerable improvements in the levels of technical and economic performance, and to validation of all the environmental qualities.

Coordinated by GRTgaz, this project mobilizes various French partners with complementary skills.

Jupiter 1000, a unique demonstration plant in France

  • First experiment in France at a megawatt (MW) scale, i.e. a production level equivalent to the annual consumption of about 150 families;
  • First project involving injection of hydrogen and synthesized methane into the natural gas transmission network in France;
  • First project involving recovery of CO2 stemming from industrial smoke;
  • First project combining two electrolysis technologies: PEM (membrane) and Alkaline;
  • Implementation of new capture and methanation technologies.

Schéma de principe du projet JUPITER 1000 Outline diagram for the Jupiter 1000 project
Outline diagram for the Jupiter 1000 project.