The phrase "to compress the hydrogen" means to squeeze or press the hydrogen gas tightly into a smaller space. It is done to make the hydrogen more compact and denser. Full definition
To show the state of Toyota's hydrogen program, a hydrogen fuel cell, electric - powered Toyota Highlander achieved an estimated range of 431 miles on a single full tank of compressed hydrogen gas in a recent test run. (automobilemag.com)
The Honda's fuel tank will hold 171 liters of compressed hydrogen gas in its high - pressure hydrogen storage tank. (autobytel.com)
We can also store the leftover renewable energy in the form of compressed hydrogen for a later use when the electrical demand is higher, or as fuel for vehicles,» Serra adds. (sciencedaily.com)