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Water Dew Point in Natural Gas

Water Dew Point in Natural Gas

Water Dew Point in Natural Gas

(OP)
I wonder if anyone can point me in the right direction on this question.  I have 7 lbs/mmcf water vapor in natural gas at atmospheric pressure.  What is the water dew point temperature?  At 3,600 psi?  Where do I find the curve or method to calculate this?
 
Any help would be greatly appreciated.  I had heard that GRI or GPSA had developed curves for this but have not had luck locating anything.

RE: Water Dew Point in Natural Gas

Extra-polating from the GPSA chart, the dew point is about 50 oF and the hydrate temp is above 70 oF.

RE: Water Dew Point in Natural Gas

(OP)
Thanks - Is that data for the gas at 3,600 psi, or atmospheric?  I was looking for both.  Also, what book can that curve be found in or can it be purchased separately?  I may need to purchase it, as we will be sampling this gas stream regularly for fuel quality maintenance (Compressed nat gas for NGV's)

RE: Water Dew Point in Natural Gas

The water dew point of natural gas at atm pressure is about -40 oF and ice temp is ofcourse 32 oF.

There is an earlier threat in Chemical Engineering about this tropic.  Try searching for it.

  

RE: Water Dew Point in Natural Gas

I don't know if that chart is available separately, but the text I have it in is GPSA's Engineering Data Book, Volume II, in Section 20 (Dehydration).  It might be in a different section now, however, as I'm still using the 10th edition, and I believe they're on the 11th edition now, if not the 12th.

RE: Water Dew Point in Natural Gas

(OP)
Thanks for your help guys.  This is really a great means of sharing knowledge.

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