Open AccessThe influence of temperature, pressure, salinity and capillary force on the formation of methane hydrate
Author(s) -
Zhenhao Duan,
Ding Li,
Yali Chen,
Rui Sun
Publication year - 2011
Publication title -
geoscience frontiers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.842
H-Index - 57
eISSN - 2588-9192
pISSN - 1674-9871
DOI - 10.1016/j.gsf.2011.03.009
Subject(s) - methane , thermodynamics , hydrate , clathrate hydrate , dissociation (chemistry) , van der waals force , salinity , equation of state , chemistry , geology , organic chemistry , physics , oceanography , molecule
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
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