How to remove dissolved water in propane
How to remove dissolved water in propane
(OP)
Hello,
At this moment I'm working on a project to investigate possible techniques to remove dissolved water in propane.
The only thing I can find is installing a dryer with silica gel or injecting propane to reduce the freezing point.
Are there other techniques applicable?
Does anyone have experience with removing water from propane?
Does someone have a graph where solubility of water in propane is plotted against the temperature?
At this moment I'm working on a project to investigate possible techniques to remove dissolved water in propane.
The only thing I can find is installing a dryer with silica gel or injecting propane to reduce the freezing point.
Are there other techniques applicable?
Does anyone have experience with removing water from propane?
Does someone have a graph where solubility of water in propane is plotted against the temperature?





RE: How to remove dissolved water in propane
RE: How to remove dissolved water in propane
But we want to get rid of the methanol. To pass the freezing test you have to remove the water.
I made some mistakes in my description:
Injecting Propane should be injecting methanol.
RE: How to remove dissolved water in propane
Specific gravity of liquid propane at 60F is 0.504 (relative to water) so draining the bottom of the tank gets you a long way toward removing the bulk water. The water vapor in the vapor space is a tougher issue.
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
RE: How to remove dissolved water in propane
Pepijn76,
the following link
Link
presents the 2 alternatives to the methanol injection.
If you need a very deep removal you need to go to a Molecular Sieves adsorption system, generally TSA (twmperature switch adsorption).
It depends on the downstream application/plant. What is it?
In order to give more details you should specify the residual content of water (or water dew point) you want to achieve.
good luck
RE: How to remove dissolved water in propane
We don't know what the downstream application is. We just store it in spheres and bullits.
We did an analysis on water content and found a watercontent of 10 and 24 ppm in 2 rundown streams, while we expected more because of the temperature of the rundowns of 23-28°C and 40-43°C respectively. Therefore I would expect 10 times as much. Maybe the free water that was formed due to the cooling down was drained of and not measured. Even if the temperature decreased to room temperature when analyzing it you would expect +/- 180 ppm.
RE: How to remove dissolved water in propane
We don't have this book in our library. Is it possible for you to make a scan of it when you have the opportunity.
RE: How to remove dissolved water in propane
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
RE: How to remove dissolved water in propane
Best regards
Morten