How is pure oxygen extracted/manufactured?
In: 1
Mostly by fractional distillation. Atmospheric air is drawn into a system and filtered to remove impurities and water vapor, then repeatedly cooled in distillation towers until the oxygen liquefies and then is drained out of the tower.
It can also be produced by electrolysis of water, but this method is less than ideal, as it requires as much input energy as it gets back.
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