Previously we have suggested the concept of tuning hydrate compositions which makes it
possible to increase the gas storage capacity of binary hydrates. Herein, we report for the first
time the existence of a critical guest concentration (CGC) and establish the complete tuning
pattern that appears to exist in binary hydrates, including the water-soluble hydrate formers
(promoters) and water insoluble guests,. The first attempt to verify the new features of clathrate
hydrate compositions is executed on the binary hydrate of CH4 + THF and involves a detailed
examination of the guest distribution by spectroscopic methods. THF molecules by themselves
form sII hydrate from a completely miscible aqueous solution, and in this structure, because of
their size, THF molecules occupy only the large 51264 cages. The CGC value appears to depend
largely on the chemical nature of the liquid guest component participating in the binary hydrate
formation. The present experimental findings on the existence of critical guest concentration and
the complete tuning phenomenon can be expected to make a meaningful contribution to both
inclusion chemistry and a variety of hydrate-based fields.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:BVAU.2429/1093 |
| Date | 07 1900 |
| Creators | Lee, Jong-won, Park, Jeasung, Ripmeester, John A., Kim, Do-Youn, Lee, Huen, Cha, Jong-Ho |
| 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 | Ripmeester, John A. |
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