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Shouldn't the comparison be carbon removed by this per unit energy used vs carbon produced by hydrocarbon powered power plant per unit energy created? E.g doing the math with some looked up data, this removes 1 ton of carbon per 2.5MWH. One ton of coal generates 8.1MWH. One ton of goal generates 2.4 tons of CO2, So it my math is correct (please verify), this already runs at an efficiency ratio of (8.1 (MWH) / 2.4 (tons CO2) / 2.5 (MWH / tons CO2) ) = 1.35, which being larger than 1 already, means that hypothetically you could power this via a coal plant and have a system that is net carbon negative and/or has some extra power remaining? Obviously we shouldn't do that, but to me the energy efficiency here is pretty impressive.