Hydrogen cars face technological hurdles: experts

Hydrogen is being touted as an environmentally friendly fuel of the future, but the road to hydrogen-powered vehicles will not be easy, industry experts said on Tuesday.

That’s because hydrogen is put in a car as a liquid at very low temperatures, but reverts to being a gas as it warms. It dissipates into the air even if the vehicle is not being used.

“You have boil off, you are ventilating hydrogen,” said BMW vice president of clean technology Frank Ochmann.

“After a certain time, after a week, say, the tank will be empty. This is a certain headache that we still have, but we’re working on this.”

yahoo