Mechanical Model of Methane Hydrate Self-Preservation in a Gaseous Medium
| Autor: | Aleksey N. Rozhkov |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Fluid Flow and Transfer Processes Materials science Mechanical Engineering General Physics and Astronomy Thermal conduction 01 natural sciences Decomposition Methane 010305 fluids & plasmas law.invention Phase instability chemistry.chemical_compound chemistry Chemical engineering law 0103 physical sciences Fracture (geology) Hydrate decomposition Hydrate Spark plug |
| Zdroj: | Fluid Dynamics. 56:93-105 |
| ISSN: | 1573-8507 0015-4628 |
| DOI: | 10.1134/s0015462821010110 |
| Popis: | The distinctive features of methane hydrate decomposition in gaseous and water media under the conditions of thermobaric phase instability of methane hydrates are considered. In the course of preceding field observations it has been established that methane hydrate decomposes significantly more rapidly in the water medium as compared with the gaseous methane medium. The basic idea consists in the fact that methane hydrate decomposition takes place inside methane hydrate fractures in which there are decomposition nuclei. Deceleration of methane hydrate decomposition is caused by the formation of ice plugs in the local zones of methane hydrate decomposition, namely, in the fractures. An ice plug is formed as a result of local methane hydrate decomposition into gas and water and intense heat consumption. In the process of freezing, water forms the plug and thereby blocks methane hydrate decomposition in the fracture. Relatively low heat conduction of gaseous methane protects the ice plugs against rapid melting. |
| Databáze: | OpenAIRE |
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