Comment by idiotsecant

There is hydrogen all over the place in exactly where you'd expect to see it: petroleum refineries and petrochemical process plants. The metallurgy of handling and storing hydrogen is well understood and has been for a long time. You just have to use alloys resistant to hydrogen embrittlement. Hydrogen is squirrelly - it doesn't like to stay put but you can make it stay put long enough to make it useful.

When you are specifying valving or piping in a refinery one of the big things you have to find out is how much hydrogen is in the process because a lot of stuff in a refinery has at least some hydrogen and it will destroy common alloys.