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What is the source on the price of liquid o2? That seems insane that it would be so cheap, don't you have to either chill the air until it condenses, or use a
by galangalalgol 4y ago
What is the source on the price of liquid o2? That seems insane that it would be so cheap, don't you have to either chill the air until it condenses, or use a selective absorber to separate it from air?
My point was why waste purified o2 on the fuel cell when you could use air and then sell the o2?
- pfdietz 4y agoYes, you chill the air. You get to recover the "cold" from the nitrogen (by using the cold separated nitrogen to chill the incoming air via countercurrent heat exchange), so you're actually only chilling (without recovery) the oxygen. Cryogenic air separation is done on a vast scale to get gaseous oxygen for the basic oxygen steelmaking process. LOX can be obtained by tapping off some of that rather than also using to chill the incoming air.