Institute of Petroleum Engineering

Centre for Gas Hydrate Research Publications



Abstract 019

Gas Solubility in Saline Water and its Effect on Hydrate Equilibria

Tohidi, B., Danesh, A., Burgass, R. W., and Todd, A. C
5th International Offshore and Polar Engineering Conference (ISOPE-95), The Hague, The Netherlands, 11-16 June (1995).
The paper presents experimental data and a predictive model for gas solubility in saline water in a wide range of temperature and salt concentration. Solubility of two important gases, methane and carbon dioxide, in aqueous electrolyte solutions of NaCl, KCl, CaCl2 and their mixtures, have been investigated. The Aasberg-Petersen gas solubility model has been improved and extended to lower temperatures, new salts, and mixed electrolyte solutions by using generated experimental data. The developed solubility model is able to calculate gas solubility in saline water within a temperature range of 260-400 K and a full range of salt concentrations. The model predictions are compared with available experimental data and good agreement is demonstrated. The above improvement in gas solubility prediction also proved to give more reliable results in hydrate calculations for high soluble gases in the presence of electrolyte solutions.

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