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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Song, Yongchen Chen, Baixin Nishio, Masahiro Akai, Makato |
| Copyright Year | 2004 |
| Abstract | Against the background of carbon dioxide (CO2) ocean sequestration technology, we investigated the solubility of CO2 in seawater at a thermodynamic state similar to that at an ocean depth of 1000 m. The experiment was performed in two steps. In the first step, we reexamined and modified the fundamental relationship between Sherwood (Sh) number and Rayleigh (Ra) number in a natural convective flow over an up-down CO2 droplet. We derived a new expression of the Grashof number for CO2 dissolution in water and seawater with the aid of the relation between the density of CO2 solution and CO2 concentration. In the second step, this new expression was applied to the estimation of solubility of CO2 from experiments examining the dissolution of an individual CO2 droplet in seawater at hydrate-formable pressure and temperature states. We found from our experiments: that (1) at hydrate-formable conditions (step two), no hydrate appeared at interface between liquid CO2 and seawater throughout the experiments within 5 hours, which suggested that a thermodynamic state (pressure and temperature) is indispensable but not a complete condition for hydrate formation; and (2) associated with this dual nature, the data of CO2 solubility estimated from this experiment are much larger than those obtained by Kimuro et al [1] from experiments of hydrate coexistence. Our data ranged from 0.052 to 0.062 in mass fraction. |
| Sponsorship | Ocean, Offshore, and Arctic Engineering Division |
| Starting Page | 301 |
| Ending Page | 307 |
| Page Count | 7 |
| File Format | |
| ISBN | 0791837459 |
| DOI | 10.1115/OMAE2004-51133 |
| e-ISBN | 0791837386 |
| Volume Number | 23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 3 |
| Conference Proceedings | ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering |
| Language | English |
| Publisher Date | 2004-06-20 |
| Publisher Place | Vancouver, British Columbia, Canada |
| Access Restriction | Subscribed |
| Subject Keyword | Water High pressure (physics) Temperature Oceans Carbon dioxide Drops Pressure Density Flow (dynamics) Low temperature Seawater |
| Content Type | Text |
| Resource Type | Article |
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