Is hydrogen the best jet engine fuel?

Question

Is hydrogen the best jet engine fuel?

Answer 1

It is the best rocket fuel. That is when U burn it with liquid oxygen. To burn it with air will produce much too much NO2.

Answer 2

No, kerosene is.   Otherwise they would be using hydrogen instead of kerosene.

Answer 3

It would produce the most environmentally benign exhaust gasses.  Unfortunately it is incredibly difficult to compress H2 to a high enough density that an airplane wouldn't essentially be a flying gas tank.  Until a high pressure lightweight storage system is invented cleaner higher BTU fuels and flying lower and slower would increase efficiency greatly in the meantime.