Aqueous CO2 Storage
Aqueous CO2 Storage
(OP)
May someone direct me to a source of standards / regulations of Aqueous CO2 storage?
What is the proportion between stored CO2 mass and required vessel's volume?
Many thanks in advance!
What is the proportion between stored CO2 mass and required vessel's volume?
Many thanks in advance!





RE: Aqueous CO2 Storage
I always design and try to maintain a maximum Liquid CO2 to vapor space in the tank of 85%. This "fill" ratio has proven its worth over the many years I spent with the CO2 industry. It allows for enough variation in saturated conditions and gives sufficent cushion for the vapor space.
I've used this standard even while producing high-pressure liquid CO2 and expanding it directly into the storage tank for its subsequent storage at 200 - 250 psig. The expanded vapors were separated within the vapor space and returned to process recycle. I also use this fill ratio on transport tanks as well. I've taken the ratio as high as 90% on large and well-instrumented plant storage tanks - but I always install redundant level alarms just in case, to be safe from an over-fill or a liquid return through the vapor balance lines.
You cannot afford an unexpected pressure relief device to go off on a liquid CO2 storage tank. If the valve sticks open with dry ice under the seat, the tank can relieve down to atmospheric pressure and the subsequent liquid/dry ice temperature within the tank resulting from the relief will damage the quality of the tank steel to the point that you will have to destroy it - a very, very expensive lesson to learn!
Art Montemayor
Spring, TX
RE: Aqueous CO2 Storage
In the previous post, I assumed you meant to say "saturated" CO2 - not "aqueous" CO2 (or carbonated water),
Art Montemayor
Spring, TX