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Subject:

Re: separation of methane from CO2

From:

Simon Poulson <[log in to unmask]>

Reply To:

Stable Isotope Geochemistry <[log in to unmask]>

Date:

Tue, 1 Jun 2010 10:41:36 -0700

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>Dear All,
>Does anyone know if it is possible to achieve separation of CO2 from 
>CH4 under vacuum using cryogenic separation?
>If so, I'd greatly appreciate any papers dealing with the subject, 
>or any tips/hints.
>Cheers,
>Shaun


Shaun,

If I recall correctly, CH4 has a partial pressure of approx. 10 mm Hg 
or so at liquid nitrogen temperature, so if you can reduce your 
pressure below this then CO2 will freeze at liquid nitrogen 
temperature but CH4 will not.

Cheers,
Simon

-- 
*****
Simon Poulson
Research Associate Professor
Dept. of Geological Sciences & Engineering MS-172
University of Nevada - Reno
1664 N. Virginia St.
Reno, NV 89557-0138. USA
(775) 784-1104
Fax: (775) 784-1833
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http://www.mines.unr.edu/isotope/simonhome.html
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