Mine-to-H2 seeks to demonstrate the feasibility of reusing a former coal mine to produce green hydrogen, applying circular economy principles and integrating it into the heating sector. This involves setting up a green hydrogen plant at the coal mine.Fondón Well"The project is located in Langreo (Asturias, Spain), with the capacity to supply green hydrogen for road transport, hybridise with existing geothermal installations, inject hydrogen into the natural gas grid and provide training programmes in renewable energies for former coal miners. The overall objective is to contribute to the decarbonisation of key sectors and promote the transition to a more sustainable and environmentally friendly economy.

The objectives of the project Mine-to-H₂ include:

• Develop circular economy activities in former coal mines, using mine water for electrolysis and thereby reducing dependence on water supply to the population.
• Significantly mitigate climate change by saving energy in geothermal heating through a new waste heat recovery process using electrolyser cooling.
• Improve the adaptation of coal mines to the transition towards production phase-out by assessing the feasibility of the proposed green hydrogen plant in selected locations.
• Increase the motivation of coal mining companies to invest in renewable energy by demonstrating the economic viability of green hydrogen plants and the advantages of old coal mines for such investments.
• Increase the number of former coal miners trained and retrained in renewable energy through training programmes for the operation of green hydrogen plants.