The influence of temperature, pressure, salinity and capillary force on the formation of methane hydrate
| Autor: | Rui Sun, Yali Chen, Zhenhao Duan, Ding Li |
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| Rok vydání: | 2011 |
| Předmět: |
Salinity
Materials science Capillary action lcsh:QE1-996.5 ab initio potential Ab initio Earth and Planetary Sciences(all) Thermodynamics Porous sediment Dissociation (chemistry) Methane Capillary radius lcsh:Geology Thermodynamic model chemistry.chemical_compound chemistry Methane hydrate General Earth and Planetary Sciences Phase equilibria Forming conditions Hydrate |
| Zdroj: | Geoscience Frontiers, Vol 2, Iss 2, Pp 125-135 (2011) |
| ISSN: | 1674-9871 |
| DOI: | 10.1016/j.gsf.2011.03.009 |
| Popis: | We present here a thermodynamic model for predicting multi-phase equilibrium of methane hydrate liquid and vapor phases under conditions of different temperature, pressure, salinity and pore sizes. The model is based on the 1959 van der Waals–Platteeuw model, angle-dependent ab initio intermolecular potentials, the DMW-92 equation of state and Pitzer theory. Comparison with all available experimental data shows that this model can accurately predict the effects of temperature, pressure, salinity and capillary radius on the formation and dissociation of methane hydrate. Online calculations of the p–T conditions for the formation of methane hydrate at given salinities and pore sizes of sediments are available on: www.geochem-model.org/models.htm . |
| Databáze: | OpenAIRE |
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