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- W2043285586 abstract "Abstract Global warming has increased interest in quantification of the dissolution of CO2 in (sub)-surface water. CO2 is present above the surface water. Dissolution of CO2 into water (or oil) causes a density increase, with respect to pure water (or oil). This density effect causes natural convection, which enhances the mass transfer rate across the interface. This article describes a series of experiments performed in a cylindrical PVT-cell, where a fixed volume of CO2 gas was brought into contact with a column of distilled water. The results show that the mass transfer rate across the interface is much faster than predicted by Fick's law. This mass transfer rate increases with increasing initial gas pressure. However, in the long term the mass transfer rate is controlled by diffusion alone. The long term behavior, therefore, allows the determination of the diffusion coefficient. Its value agrees with values presented in the literature. A similar mass transfer behavior was observed for the experiments with an oil phase (n-C10 and n-C16). Therefore analogous experiments using oil instead of water are valuable for enhanced oil recovery projects. A theoretical interpretation of the observed effects has been proposed, based on diffusion and natural convection phenomena. The Rayleigh number is of the order of one million whereas the Schmidt number is of the order of five hundred. The ensuing equations have been solved numerically, using the finite volume approach. There is qualitative agreement between the experiment and the numerical results and similar to the experiments the mass transfer becomes diffusion like in the long term." @default.
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- W2043285586 date "2007-06-11" @default.
- W2043285586 modified "2023-09-27" @default.
- W2043285586 title "Enhanced Mass Transfer of CO2 Into Water and Oil by Natural Convection" @default.
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- W2043285586 doi "https://doi.org/10.2118/107380-ms" @default.
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