 up to 277kg of hydrogen fuel is safely contained aboard hydroflex in 36 high pressure tanks this is fed into fuel cells where a chemical process converts the hydrogen and oxygen from the air to generate clean electricity innovations such as hydroflex can play a significant role in achieving the 2050 net zero target by encouraging modal shift from road transport to rail hydrogen powered trains will support the progressive roll out of electrification schemes as well as delivering clean train travel on routes where overhead wires cannot be economically justified hydroflex is part of a suite of porterbrook engineering initiatives designed to improve air quality reduce carbon and deliver a cost effective and sustainable railway for both passengers and taxpayers 