The dissociation behavior of the CH4+CO2 binary gas hydrate has been investigated using
Nuclear Magnetic Resonance (NMR) spectroscopy. This technique allows us to distinguish
the hydrate structure present, as well as to quantify phase concentrations. Single-pulse
excitation was used in combination with magic-angle spinning (MAS). Time-resolved in situ
decomposition experiments were carried out at different compositions in sealed, pressurized
samples. The decomposition profiles of the CH4+CO2 binary gas hydrate system obtained at
various compositions suggest that the decomposition rate is a strong function of the fractional
cage occupancy and temperature. An unexpected CH4 hydrate reformation was observed
during our decomposition experiments when the temperature reached the ice melting point. A
decrease on the CO2 content in the hydrate phase was found during the decomposition
experiment, as the pressure and temperature of the system increases.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:BVAU.2429/1143 |
| Date | 07 1900 |
| Creators | Rovetto, Laura J., Dec, Steven F., Koh, Carolyn A., Sloan, E. Dendy |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | text |
| Rights | Sloan, E. Dendy; Koh, Carolyn A.; Dec, Steven F. |
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