Institute of Petroleum Engineering

Centre for Gas Hydrate Research Publications

Abstract 175.

Gas Hydrates in Low Water Content Gases: Experimental Measurements and Modelling Using the CPA Equation of State

Chapoy, A., Haghighi, H., Burgess, R., and Tohidi, B.
Fluid Phase Equilibria, in press (2010).

In this communication, new experimental data are reported for the water content of methane and two synthetic gas mixtures in equilibrium with hydrates at pressures range from 5 to 40 MPa and temperature down to 251.65 K. The measurements have been made on equilibrated samples taken from a high-pressure variable volume hydrate cell using a new analyser based upon tuneable diode laser absorption spectroscopy (TDLAS) technology. A statistical thermodynamic approach, with the Cubic-Plus-Association equation of state, is employed to model the phase equilibria. The hydrate-forming conditions are modelled by the solid solution theory of van der Waals and Platteeuw. The thermodynamic model was used to predict the water content of methane and synthetic gases in equilibrium with gas hydrates.

Reprints of this article are available in Adobe Portable Document Format (.pdf). You may request a reprint by submitting an email to the webmaster with the abstract number in the subject line. To read pdf files, you will require Adobe Acrobat Reader, which can be downloaded for free at the Acrobat Reader Download Page

Submit requests to: