Vapour pressure of Ammonia: Ammonia solution under pressure
Vapour pressure of Ammonia: Ammonia solution under pressure
(OP)
I have a system where aqueous ammonia is heated under pressure.
Solubility of ammonia drops from 33% at 0°C to 16% at 60°C at normal atmospheric pressure.
The system is under pressure of 10 bars.
Can I predict how much ammonia remain dissolved in solution?
If so, how?
Solubility of ammonia drops from 33% at 0°C to 16% at 60°C at normal atmospheric pressure.
The system is under pressure of 10 bars.
Can I predict how much ammonia remain dissolved in solution?
If so, how?





RE: Vapour pressure of Ammonia: Ammonia solution under pressure
RE: Vapour pressure of Ammonia: Ammonia solution under pressure
Try:
RE: Vapour pressure of Ammonia: Ammonia solution under pressure
Good luck,
Latexman
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RE: Vapour pressure of Ammonia: Ammonia solution under pressure
Would one fifth of my ammonia turn into gas?
RE: Vapour pressure of Ammonia: Ammonia solution under pressure
Look at "Vapor Pressure of Solutions" in Perry's.
For a rough answer, usually the inventory in the vapor space of a closed system is negligible (it may not be in your case). If negligible, I would expect 33 wt. % liquid heated to 60 C to have a partial pressure of NH3 = about 4 bar (from Perry's). There would be a small partial pressure of the water that we could probably ignore. So, the liquid would still be about 33% and the vapor about 40% NH3. The other 60% in the vapor is whatever is providing pressure up to 10 bar.
For a more accurate answer, there would have to be a material balance of the two phases and interpolation of equilibrium data.
Good luck,
Latexman
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers