water content in natural gas

[rahmath814]

thread798-381370

Hi all
I'm confused about the chart of water contained in natural gas
in the chart mc Keeta-Wehe maximum temperature is 280 F, while the temperature of mine mine is 325 F.

so, How do I get for water contained in natural gas ?

 

[georgeverghese]

Approx value at 325degF may be obtained from the graphs further down - fig 20-10 and 20-11 in GPSA 11th edition (yr 1998). By looking at these trends, it should also be possible to extrapolate numerically out to 325degF with some more effort.

 

[apetri]

at those high temperatures (325 F) vapor pressure for water is relatively high and you may estimate assuming ideal law with relatively limited errors,
as noted in mentioned thread 798-381370 at lower temperatures you may get accurate results with specific methods (see for example ISO 18453) which however require a software...

 

[zdas04]

At that temperature I'd check a steam table to see what the boiling point of water is at your pressure. If the pressure is below 95 psia then in a very short time the liquid will boil off and the McKetta chart is not valid. Above that pressure, and the chart is log-log linear above about 200F so extrapolating is quite reasonable.

David Simpson, PE
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist