How to convert natural gas dew point into ppmV

[Vivaldi M. Smith]

Anyone knows here, what equation to use for converting natural gas dew point into ppmv

 

[pierreick]

Hi,
Are you a chemical engineer? Get a copy of GPSA engineering data book .
More details better answer.
Note: ppm volume=ppm mol

Pierre

 

[Vivaldi M. Smith]

Pierre, please give me the page that I can reference.

 

[pierreick]

Hi,
This is an iterative calculation where minimum data are required, from field, lab or textbook.
I do believe that the link attached should help you to support your work. Check for Rashford Rice Method (links attached)

https://www.e-education.psu.edu/png520/m12_p3.html

https://ocw.snu.ac.kr/sites/default/files/NOTE/7. Phase equilibrium for separator design_0.pdf

Good luck.
Pierre

 

[georgeverghese]

ppmv of what? Is this natural gas water dewpoint or hydrocarbon dewpoint?

 

[Vivaldi M. Smith]

Replying to georgeverghese, it is natural gas water dew point.

 

[georgeverghese]

There may be some equation, but I dont know if it. The graphical approach is :
a) See GPSA chapter on gas dehydration for the water content of natural gas at any P and T
b) Convert the water content (which would be in kg/mmsm3(SI units) or lb/mmscf) to ppmv

If your gas has high CO2 (> 5% v/v) or high H2S, there are are some correction factors which are also illustrated in the GPSA.

 

[Vivaldi M. Smith]

George, thanks alot. Your input is greatly appreciated. it helped. Have a great day.

 

[pierreick]

Hi,
You and others may want to use this free website to support your work:

https://www.questconsult.com/software/thermodynamic-properties-fluids/

Good luck
Pierre