[Jonty30]

If it works as intended, they've solved a big hurdle in the hydrogen economy, storage. Currently, it is impossible to hold hydrogen because it leaks.

[alloysteel]

The chemistry is not clear to me. First inject hydrogen at 400 degrees Centigrade into a retort filled with iron oxide (Fe2O3), forming free metallic iron and water, what steps are taken to reverse this reaction? More heat? Let the iron rust to again form ferric oxide and free hydrogen? How fast does this proceed? Is the hydrogen produced at a rapid enough pace to be a reliable power source?

[Deaf Smith]

“Surplus solar power…”

I do not think there is such a thing.

Solar power is only produced during peak demand and does not meet peak demand.

[oldbill]

Let me get this straight -
You split water into H and O and then mix with iron to get water again.

Why not just pour water in the tank and avoid the middleman?

[BipolarBob]

Hydrogen embrittlement will settle in over time and cause surface fractures. Small at first but this plus temperature changes (expand and contraction) and you’ll have more leakages than Biden Depends.

[DannyTN]

Are they going back to learn about blimps? Because that didn’t end so well.