[samus]

The article assumes the viability of a hydrogen-driven process to reduce the iron. The intention is to establish a circular economy of reducing iron oxidized by burning it in the proposed fashion.

The byproducts from burning iron are no more noxious than burning fossil fuels, possibly less so. Filtration technologies exist as well.

Of course this technology would have to compete with other technologies to make use of excess renewable energy, like liquid hydrogen storage and transport (which it has several advantages over), iron-based battery technologies, or green-produced carbon-based fuels. I guess it makes the most sense in applications where heat instead of electricity is required.

[_hypx]

> Of course this technology would have to compete with other technologies to make use of excess renewable energy, like liquid hydrogen storage and transport (which it has several advantages over), iron-based battery technologies, or green-produced carbon-based fuels. I guess it makes the most sense in applications where heat instead of electricity is required.

I'm going to come out and say those competing technologies are vastly more plausible and viable.