CO2 absorption rate in water
CO2 absorption rate in water
(OP)
trying to find out the absorption rate of carbon dioxide in water under pressure.
I have a air stream at 500SCFM with some CO2 (i.e. 15%) and trying to calculate how much CO2 will be absorbed if ran thru a Water scrubber (15% CO2 goes to 5%).
I have the solubility value at atmosphere but know absorption increases under pressure.
I have a air stream at 500SCFM with some CO2 (i.e. 15%) and trying to calculate how much CO2 will be absorbed if ran thru a Water scrubber (15% CO2 goes to 5%).
I have the solubility value at atmosphere but know absorption increases under pressure.





RE: CO2 absorption rate in water
m777182
RE: CO2 absorption rate in water
At 30oC, Henry's constant for CO2, H = 1900 atm. If Henry's law is applicable: x = Py÷H
where
x= mol fraction in water
Py = partial pressure in gas (e.g., total pressure × mol fraction), atm
CO2 reacts with water as follows:
Even at high pressures you'll find you need a large liquid flow rate. As m777182 says, if you add something to the scrubbing solution that will consume H+, such as an alkali, much less water can be used.