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Experimental data, modeling, and correlation of carbon dioxide solubility in aqueous solutions containing low concentrations of clathrate hydrate promoters: Application to CO <inf>2</inf>-CH <inf>4</inf> gas mixtures

Abstract:

This study presents experimental and modeling data of solubility of carbon dioxide (CO 2) in aqueous solutions that contain water-soluble additives. Low concentration of tetrahydrofuran (THF) and sodium dodecyl sulfate (SDS), which are very commonly used additives in the field of clathrate hydrates research, have been considered here. A simple experimental method is proposed to determine the gas solubility. The measured data, in good agreement with those found in literature, allow developing a straightforward thermodynamic model and an easy-to-use engineering correlation for the determination of the apparent Henry constant, used to estimate the CO 2 solubility in aqueous solutions containing SDS, at different temperatures and THF concentrations. Finally, as a practical application, experimental data and modeling results are compared regarding the equilibrium pressure and the gas composition obtained after solubilization of a typical CO 2-CH 4 gas mixture. © 2012 American Chemical Society.