Very cool, if true

My expectation is that they are benefiting from some form of subsidy for the technology and capital costs and getting the benefit of cheap waste heat.

In a future where non-dispachable renewables make up a large part of the electricity supply I think this is the sort of thing you might use to take up surplus power for grid balancing with a useful product.

I'm not sure what you do to sequester the carbon. I saw some suggesting just dumping blocks of pure carbon covered in concrete in subduction zones on the sea floor and thus inserting the carbon in to the lithosphere. I wonder if you could use it to make construction diamond and if so, would replacing all our built infrastructure over 200 year with diamond instead of concrete and steel. I don't know how much the built environment weighs if built of diamond.