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Air moisture absorption by chemicals

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shvet

Petroleum
Joined
Aug 14, 2015
Messages
779
Location
RU
Dear forummembers

Please share knowledge/experience

We have chemicals [let's say 99.9% methanol]. We unload these from car tanks to storage tanks and from storage tanks to a tanker. What if we store and load/unload these not using inert gas. E.g.:
- inbreath of car tanks by ambient air
- breathing of storage tanks by ambient air during let's say 7 days
- outbreath of tanker by ambient air and transport during let's say 7 days
Will [let's say] methanol become delited up to 99.8% as a result of such transloading?

I hope my idea is clear. Any links and personal experience will be appriciated.
 
Corrosion of carbon steel and SS with methanol in contact with humid air is well known in the oil/gas industry. Tanks should always be dry N2 padded. Watch out for inert gas generated with PSA driers and oil flooded screw compressors - most likely this is offspec and humid "inert gas". Use oil free air compressors for inert gas generation.
 
georgeverghese said:
Corrosion of carbon steel and SS with methanol in contact with humid air is well known in the oil/gas industry.
Can you tell more?
 
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