Calculating Degassing Values

[tango_uniform]

Hello, I have tried searching google, and a number of forums including this one with little to no success. The best I have found is this site which is not fully operational:

https://www.lenntech.com/processes/degasser.htm

The question I have is based on the vapor pressure of a chemical like hydrogen sulfide: 252 psig, or carbon dioxide 830 psig, and a gas to liquid flow rate of 4 to 1, and an inlet water concentration of 10ppb, what would the outlet water concentration be of said chemical? What about inlet concentration of 3ppb, assuming counter current and a contact time of 45 seconds.

What I am really after here is how to accurately calculate the concentrations of chemicals into an out of a degassing column based on the chemical properties of the chemicals in the water and the water itself. How does the water impact degassing: salt vs fresh, brackish or is it conductivity of water that determines degassing vs salinity.

I appreciate the assistance here and look forward to the discussion.

 

[bimr]

You should look up Henry's law.

Link to Henry's Law

If you have a specific question or application, why not post it to obtain a better answer? The parameters that you are posting are in the theoretical range and outside of what is generally encountered in normal practice.

 

[tango_uniform]

Bimr, I’ll looks into Henry’s law and that math, cheers.

Those values are the specific question, 4:1 gas to liquid, 45 second contact time, counter current 10ppb some degassable chemical concentration: CO2, H2S… in, what is the out concentration? And more interestingly how to set up the math.