Key takeaways Burning hydrogen or its derivatives in engines could make it possible to decarbonise trucks, boats and planes. This method has two main advantages: few technological adjustments and an affordable price. For heavy trucks, the hydrogen engine seems to be as viable a solution as fuel cells. It is rather the hydrogen derivatives (synthetic fuel and ammonia) that should be put forward for aviation and maritime transport. The future of these sectors will not be mono-technological because they are much more difficult to decarbonise than mass transportation.
ven so, hydrogen takes up four times more space than kerosene and must be kept at the extremely low temperature of ‑253°C.
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