Hydrogen is the most common element in nature. It is estimated to make up 75% of the mass of the universe. Except for that contained in air, it is primarily stored in water in the form of a compound, and water is the most widely distributed substance on earth.
Hydrogen has the best thermal conductivity of all gases – i.e. ten times higher than most of them – and it is therefore an excellent heat transfer carrier in the energy industry.
Hydrogen has good combustion performance, rapid ignition, and has a wide fuel range when mixed with air. It has a high ignition point and rapid combustion rate.
Except for nuclear fuels, the calorific value of hydrogen is the highest among all fossil and chemical fuels, as well as biofuels, reaching 142.35 kJ/kg. The calorie per kilogram of hydrogen burned is about three times that of gasoline and 3.9 times that of alcohol, as well as 4.5 times that of coke.