Bibliographic Details
| Title: |
Accelerated Formation of THF−H2Clathrate Hydrate in Porous Media. |
| Authors: |
Dipendu Saha1, Shuguang Deng1 |
| Source: |
Langmuir. Jun2010, Vol. 26 Issue 11, p8414-8418. 5p. |
| Subject Terms: |
*TETRAHYDROFURAN, *CLATHRATE compounds, *HYDRATES, *MESOPOROUS materials, *CHEMICAL kinetics, *STOICHIOMETRY |
| Abstract: |
Porous media were used to control the hydrogen clathrate particle size in order to accelerate its formation kinetics. Stoichiometric tetrahydrofuran−hydrogen binary clathrate hydrates with ∼1 wt % hydrogen loading formed in the mesopores of four porous media with median pore diameters of 49, 65, 100, and 226 Å at 270 K and hydrogen pressure of 65 bar. The minimum formation time for the tetrahydrofuran−hydrogen binary clathrate hydrates was 27 min in a porous medium with a median pore diameter of 49 Å, which is 6−22 times faster than the tetrahydrofuran−hydrogen binary clathrate hydrates formed in the bulk ice. The clathrate formation time was found to increase with pore size of the porous media. A modified shrinking core kinetic model was used to calculate the diffusivity of hydrogen in the tetrahydrofuran-hydrogen binary clathrate hydrates. Hydrogen diffusivities in the tetrahydrofuran-hydrogen binary clathrate hydrates were found to be on the order of 10−18−10−19m2/s and decrease with increasing pore size or clathrate particle size. [ABSTRACT FROM AUTHOR] |
|
Copyright of Langmuir is the property of American Chemical Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Academic Search Complete |
