Solubility of Air in liquid CO2

[kenngy]

I am trying to find a chart/table for the solubility of air in liquid CO2. My problem is how will I know the purity of liquid CO2 after being liquefied in a condenser.

Can anyone help me on this.

Thanks

 

[zdas04]

I'm trying to do the math here and it isn't working out. How do you get air in contact with liquid CO2? Liquid CO2 can't exist at atmospheric pressure and has a sublimation point of -110F at atmospheric pressure. No place on earth is that cold, so as the CO2 sublimates the ice is surrounded by nearly pure gaseous CO2--no liquid here. The triple point is at -69.8F and 75.13 psia, again how do you contact air? I think you'll have to give some more information on the engineering problem you're addressing before you will get much meaningful help.

David

 

[kenngy]

The brewery co2 recovery before the co2 liquefier usually is at 99.7-99.9% co2 purity the 0.1% is air (70% N2/ 30% O2). During the liquifaction of co2 though most of the air remains as a gas and is vented above the liquefier.
What I am trying to find out is how soluble is air with liquid CO2 at 250 psig, -8degF?
Just imagine an atmospheric water with oxygen being soluble at about 9 ppm, this is just the as the case with liquid co2 right?

kenngy

 

[zdas04]

Air tends to be 80% N2 and 20% O2.

Acording to NIST, at 250 psia, air will not liquify until -251F so now I understand your question.

I just don't have any idea how to find the Henry's Law constant for air and liquid CO2. None of my resources have anything about liquid CO2 at all. The detailed study the effects of changing temperature of pure water on the rate of solubility is the subject of conflicting papers, I don't think that this topic has reached the maturity where anyone is looking at different solutes. Sorry.

David