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Predicting H2S in Liquid and Vapour Phase of Oil
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Source：Internet Author：Unknow Pubdate：2008-04-15
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kmac23 (Petroleum)
11 Oct 07 5:46
I've been using a rough 'rule of thumb' to convert the concentration of H2S in oil to the concentration in the vapour phase as being 1ppm w/v ~= 100ppm v/v.
Is this a valid estimation?
Are there other ways to predict it more accurately?
Can anyone describe the reasoning behind it and state any assumptions i.e. does it only apply to systems within a certain temperature and pressure and oil density ranges etc?
mbeychok (Chemical)
26 Oct 07 13:31
What are the dimensional units of your ppm w/v? Is it pounds per million cubic feet, kg per million cubic meters, or what?
Can't answer your question without that information. Milton Beychok
(Visit me at www.air-dispersion.com)
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25362 (Chemical)
26 Oct 07 15:42
字串1
I recall having read somewhere that H2S in the vapors coming out of the ullage opening of a tank receiving crude oil of 70-ppm H2S (on a w/w basis), showed a concentration of ca. 7000 ppm H2 by volume. I assume the T,P conditions were not far away from 1 ata and 70oF.
mbeychok (Chemical)
26 Oct 07 22:34
25362:
The numbers you recall for crude oil equate to 1 ppm w/w = 100 ppm v/v which is the same as the original poster's ... except that the original poster wrote 1 ppm w/v = 100 ppm v/v. Perhaps, he/she simply made a mistake in his/her units? Milton Beychok
(Visit me at www.air-dispersion.com)
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25362 (Chemical)
27 Oct 07 1:43
To mbeychok,
I was aware of that. In particular, after reading your first response. Thanks. 字串2
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