>92 percent efficiency in converting a ton of CO2 as described, using just 230kWh of energy.<p>If I'm calculating this right, it's twice as efficient as oxygen concentrators at generating oxygen, which are more efficient than oxygen generators (eg hydrolysis).<p>One ton of CO2 has `(8+8)/(8+8+6)` tons or 660 kg of oxygen, and `660 kg / ( 230 kWh / 0.92 )` gives 2.64 g / Wh. Whereas oxygen concentrators* provide around 5 L per 350 Watt-minutes, at 1.3g / L**, gives 1.08 g/Wh (and slightly less for that PDF's "oxygen generator" efficiency figure). Though these aren't industrial processes, which might be more efficient.<p>Now, gas that's passed through gallium isn't necessarily healthy, but this reaction might have serious potential.<p>* <a href="https://www.seforall.org/system/files/2020-05/Efficiency-Oxygen-Concentrator.pdf" rel="nofollow">https://www.seforall.org/system/files/2020-05/Efficiency-Oxy...</a><p>** <a href="https://www.wolframalpha.com/input/?i=density+of+oxygen+at+27C" rel="nofollow">https://www.wolframalpha.com/input/?i=density+of+oxygen+at+2...</a>