[hobobot]

I've been searching google and a few of the major chemical suppliers but I can't really find a reliable source of "Zeolite 5A" which has the chemical formula Na12[(AlO2)12((SiO2)12].27H2O

I'm a mechanical engineer so I don't really know who the best suppliers are. Any recommendations?

[billnotgatez]

http://en.wikipedia.org/wiki/Zeolite

Interesting stuff

Currently, the world’s annual production of natural zeolite is about 4 million tons. Of this quantity, 2.6 million tons are shipped to Chinese markets to be used in the concrete industry.

Is it that hard to find?

[hobobot]

Certain kinds are hard to find. The one I'm looking for specifically absorbs things around the 5 angstrom range.

There's another one called "13x" that would be good too. It absorbs things less than 10 angstroms.

What I'm doing is trying to make a Pressure Swing Absorption system. Essentially, you put this 13X stuff in a container and then run air through it at high pressure. It removes the nitrogen leaving you with about 70-90% oxygen. If you lower the pressure, the nitrogen is released and you can re-use the material.
It's nothing new or special, but I need a LOT of oxygen so I have to build my own.

[billnotgatez]

do you renew the Zeolite after passing air though it?
can it we recycled?

[hobobot]

Yeah It's like a desiccant. Low pressures will released the trapped gasses.
Here's somebody's report that popped up on google.
http://www.phys.ufl.edu/REU/2008/reports/magee.pdf