Hydrogen fuel is a “zero carbon” model which is beginning to get some attention in the aviation industry.
Hydrogen as a fuel does not contain carbon, thus, its combustion does not cause CO2 emissions in flight – only water, which is a significant advantage over carbon-based fuels in terms of environmental impact.
Hydrogen in aviation is not a new concept. In the 1980s the Russian manufacturer Tupolev flew a jet Tu-155, with one of its 3 engines running on liquid hydrogen.
Hydrogen can be used in 2 ways: in combustion in adapted aircraft engines or in fuel cells.
Using Hydrogen may look like a simple solution but on top of the challenges of its usage there is a biggest one which is its storage. Indeed, hydrogen is highly volatile and the same quantity of energy it takes 4 times space than the kerosene, even when stored as a liquid at very low temperature (below -250oC).