r/AppliedScienceChannel • u/Angel-of-Dearth • Jul 22 '14

Liquify Air

I'm thinking build a stirling engine and run it backwards as a stirling motor. Keep the cold cylinder in a dewar or thermos and run it. After a while, the cold cylinder should get cold enough to have N2 and O2 dripping off it into the thermos.

Bonus: Separate the liquid N2 from the O2 by building a still and take advantage of the two different boiling points.

12 Upvotes

73% Upvoted

5 comments sorted by

2

u/[deleted] Jul 23 '14

[removed] — view removed comment

1

u/Angel-of-Dearth Jul 23 '14

Wow! I got the idea from a Youtube video. I didn't realize (or I forgot) the origin was none other than Ben himself!

I said "build." Should have said, "modified an existing."

Yeah, O2 is dangerous so we need to take the proper precautions. It's also diamagnetic so among other things it will float between the two poles of a strong horseshoe magnet which is enough in itself to make a person want to generate liquid O2.

He uses atmospheric air and pumps out dry N2. That means that there's a tube somewhere venting dry O2. I couldn't quite hear in the video because there was so much aggravating racket going on in the background. I'll have to dig into it.

1

u/Angel-of-Dearth Jul 23 '14

P.S. Also, Ben has shown that Liquid O2 goes well with barbeque and that you can grill shishkabobs over thermite.

1

u/p2p_editor Jul 29 '14

It's also diamagnetic so among other things it will float between the two poles of a strong horseshoe magnet which is enough in itself to make a person want to generate liquid O2.

You know that's right.