Trapping the SO2 and SO3 with limestone is more likely to create CaSO3 and CaSO4 than CaO. But there's a market for that as gypsum.
What a beautiful scam! Plenary indulgences live on!
$SDIG burns low thermal refuse coal which removes toxic waste from old coal sites. The buyer of its energy is the bitcoin network.
In burning the coal it uses limestone (CaCO3) to trap sulfur fumes which creates CaO. Then it aerates the CaCO which "captures carbon dioxide" by reforming limestone (CaCO3).
It then sells the CaCO3 "creation process" for carbon credits.
Then it can reuse the CaCO3 to burn even more refuse coal
https://ir.strongholddigitalmining.com/static-files/5e12f9ef-cff4-44f3-ae77-34bf0660bed8
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Discussion
a considerable amount of CaO in the core area still remained unreacted for coarse particles
Good article.
Getting that CaO out of the particles would be a neat trick!
You could calcine the CaSO4, again, to drive off SO2/SO3 and make sulfuric acid with it, but the economics would be unfavourable even with the government paying for the energy.
Forwarded it to a client, he'll love it.