As we await ToughSF's return to blog, here's a natural-gas-to-CO2 cycle. Dan Fernandes, Song Wang, Qiang Xu, Russel Buss, and Daniel Chen from 2019 (pdf). The key here is that its carbon can come out in liquid form, which may then be sold on. Perhaps even to a fission reactor with supercritical CO2 - which also uses Brayton.
Earlier this blog had been mooting Appalachia as a place where coal could be used more for rare-earth separation than for the energy itself. Now it's looking like the water-poor basin between the Sierras and the Rockies could be energy-rich without (much) water. Maybe even competing with the Cascades.
BACKDATE 3/24
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