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Thermodynamic calculations in the system CH4-H2O and methane hydrate phase equilibria

Journal of Physical Chemistry B

By:
, ,
DOI: 10.1021/jp055422f

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Abstract

Using the Gibbs function of reaction, equilibrium pressure, temperature conditions for the formation of methane clathrate hydrate have been calculated from the thermodynamic properties of phases in the system CH4-H 2O. The thermodynamic model accurately reproduces the published phase-equilibria data to within ??2 K of the observed equilibrium boundaries in the range 0.08-117 MPa and 190-307 K. The model also provides an estimate of the third-law entropy of methane hydrate at 273.15 K, 0.1 MPa of 56.2 J mol-1 K-1 for 1/n CH4??H 2O, where n is the hydrate number. Agreement between the calculated and published phase-equilibria data is optimized when the hydrate composition is fixed and independent of the pressure and temperature for the conditions modeled. ?? 2006 American Chemical Society.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Thermodynamic calculations in the system CH4-H2O and methane hydrate phase equilibria
Series title:
Journal of Physical Chemistry B
DOI:
10.1021/jp055422f
Volume
110
Issue:
16
Year Published:
2006
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Physical Chemistry B
First page:
8232
Last page:
8239
Number of Pages:
8