“it’s more efficient to produce iron from hydrogen gas than to produce liquid hydrogen. So iron powder as fuel is more expensive than gaseous hydrogen but cheap

“it’s more efficient to produce iron from hydrogen gas than to produce liquid hydrogen. So iron powder as fuel is more expensive than gaseous hydrogen but cheaper to produce and move across the oceans than liquid hydrogen.” He's saying liquid hydrogen, but I gotta wonder if the the real story here is an attempt to deal with moving the energy in natural gas, since the liquified natural gas story is so shitty (expensive facilities, etc.) and pipelines are politically and logistically difficult. I would not be surprised to see this turned into a "burn/process natural gas (in North America etc) to produce the iron 'fuel'. Ship the iron by train or boat & skip building pipelines and tankers and LNG facilities." Which gets us no further on the climate change front, but answers certain current European (esp German) ... political / economic ... problems.