1.   We then start to accumulate liquid hydrogen in an empty fuel tank.

2.   And if the technology for attaching the hydrogen to a metal for storage were perfected, the infrastructure for distributing and retailing liquid hydrogen does not exist.

3.   BMW has all but foregone fuel cell technology in favor of improved combustion technology using supercooled liquid hydrogen as fuel, Broede said.

4.   Both companies will work on ways to reduce the size of fuel tanks needed to store lightweight but bulky rocket fuels such as liquid hydrogen.

5.   Concealed within are two containment areas -- a bladder in the forward end for liquid oxygen and a larger compartment below for liquid hydrogen.

6.   Controllers ordered a shutdown of the errant fuel cell, which combines supercold liquid hydrogen and liquid oxygen to make electricity and water.

7.   In contrast, Washington, when dealing with fluid fuels, used not only kerosene but pushed to perfect liquid hydrogen.

8.   Its extreme low temperature also makes liquid hydrogen difficult to handle and distribute.

9.   Jupiter is composed of large amounts of liquid hydrogen and helium, the most plentiful ingredients in the universe, as well as sulphur, ammonia and methane gas.

10.   Later, liquid hydrogen will be used to improve the range.