Calculate the dew point of natural gas if I know the composition?
Calculate the dew point of natural gas if I know the composition?
(OP)
I am looking into adding more gas volume to our current scrubber, but we don't measure the dew point of our gas, only the composition. Does anyone know a quick method of calculating the dew point of natural gas if I know the composition or a program that will calculate it for me? (This is a one time thing, would rather not buy a program.)
Thanks in advance!
:)ladyCR
Thanks in advance!
:)ladyCR





RE: Calculate the dew point of natural gas if I know the composition?
Since you have a gas composition, you have the vapor mol fractions for each component. To calculate the dew point, you guess a temperature and look up the K factor for each component. Use that K factor (K = y/x) to calculate the liquid mol fraction for each component given its vapor mol fraction.
Then add up all the liquid mol fractions. If the sum is equal to 1.0, you made a great guess for the dewpoint temperature and are finished.
If the sum of the x for all the components is less than 1.0, you need to try a lower temperature.
If the sum is greater than 1.0, you need to try a higher temperature. You continue until your sum of the x = 1.0 OR you sufficiently bracket your answer for what you need.
RE: Calculate the dew point of natural gas if I know the composition?
See my response to this in the Heat Transfer and Thermo thread.
Regards,
Bob
RE: Calculate the dew point of natural gas if I know the composition?