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> The scientists obtained 92% efficiency at the remarkably low input energy of 230 kWh for the capture and conversion of a ton of carbon dioxide. Until all the
by throwaway81523 5y ago
> The scientists obtained 92% efficiency at the remarkably low input energy of 230 kWh for the capture and conversion of a ton of carbon dioxide.
Until all the coal burning power plants are shut down, that 230kwh is almost certainly better used displacing some coal. If it didn't already come from coal.
- robbedpeter 5y agohttps://www.eia.gov/tools/faqs/faq.php?id=667&t=2 https://www.eia.gov/tools/faqs/faq.php?id=667&t=2 1.13 kw/h per pound of coal burned. 260 lbs of coal enables processing of 1 ton of co2, of which about 500 lbs is captured as carbon flakes. You could burn coal, producing 525 lbs of co2 for the energy needed to process 1 ton of co2 in total, so you end up capturing 375lbs more carbon than is produced. 125lbs of the carbon flakes come from the coal, the other 50 lbs of carbon in the coal is lost as byproducts and inefficiency. So running this process, even on pure coal, sequesters 2.75 to 3 times as much carbon as it produces as co2.