Air is 20% Oxygen so pure O2 is 5 times more concentrated. "They" make
it the way you say. You could use a medical O2 concentrator (scrounge it
cause it has a silly high price) but really, like someone already said -
buy your O2 in a tank the size you need.
A tank measuring one cubic foot at atmospheric pressure will hold (100
psi / 14 psi)= 7.14 cu ft at 100 psi
A scuba sized tank will hold 74 cubic feet at ~2000 psi.
By the way, compressed O2 (even like even less than 10 psig) can cause
danger with traces of oil so be really careful with homemade tanks (i.e.
please don't do it unless you research it carefully).


John Pearson wrote:
>
> Questions from a laymen to a sceince guy regarding air density:
>
> How can I create the most oxygen rich air? Compress and chill it?
>
> If so, how much more oxygen can I pack into a bottle if I compress it at 70 degrees F to, say, 100psi at 40 degrees F?

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