Hi BradC
I am new!
Suggestion:
Try freeze-treatment as a DIY-refining method!
Quote:
Water can dissolve into propane (180 ppm @ 68F)
This water can cause two types of problems:
Water solubility decreases rapidly with temperature (65 ppm @ 32F), causing water to drop out of solution with temperature decrease, leaving a water or water–rich layer at tank bottom
Water layer can increase corrosion attack on tank metal
Water can significantly reduce fuel quality on liquid withdrawal systems
Once water layer has formed, diffusion of water into liquid propane is so slow that even if propane warms or is replaced by drier fuel, water will not readily go back into solution, but will remain as lingering source of moisture
Water vapor will be in propane vapor in higher proportions than liquid water in liquid propane (K-ratio for water in propane >> 1)Ice may be formed at vapor pressure drops (for example, in a regulator)
Further:
Moisture in Propane Liquid :
I have a section of an article someone gave me - no idea where from though:
Temperature ppm(weight) vs. Celsius saturated level in liquid propane
-40C 3ppm
-30 5
-15 13
+6C 44
+15 75
+30 173
+45 360
Note that for low temps (below zero) the vapour holds about 20 times more moisture than liquid, this is about 10 times around ambient temperature. I also have some data from GE Sensing which shows higher saturation levels (liquids) -
So,if you have a freezer available,why not let it do do job for you ... only occasionally dilute/tapp off the formed H2O-consentrated gasious phase from the BBQ chamber.
The goal is <10ppm(w) => In 1kg propane 10mg H2O
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