About

     CH4-H2O-NaCl is one of the most important gas-water-salt systems in nature, widely found in different geospheres of the Earth. Liquid-vapor phase equilibrium, solubility of CH4, density of the fluids, formation conditions of CH4-hydrate, and the homogenization pressure and density of fluid inclusions are calculated based on the most updated models. Questions can be directed to: duanzhenhao@yahoo.com .

TP Coverage
Notes
1
Vapor-liquid equilibrium and homogenization pressure and density calculations are from Ref 1.
2
Blue curve indicates the vapor-liquid-clathrate hydrate coexistence line, Ref 2 and 3.

References

1. Duan ZH, Mao SD. (2006) A thermodynamic model for calculating methane solubility, density and gas phase composition of methane-bearing aqueous fluids from 273 to 523 K and from 1 to 2000 bar. Geochim. Cosmochim. Acta., 70 (13): 3369-3386.

2. Duan ZH, Sun R. (2006) A model to predict phase equilibrium of CH4 and CO2 clathrate hydrate in aqueous electrolyte solutions. Amer. Mineral. 91(8-9),1346-1354

3. Sun R, Duan ZH. (2005) Prediction of CH4 and CO2 hydrate phase equilibrium and cage occupancy from ab initio intermolecular potentials. Geochim. Cosmochim. Acta, 69 (18): 4411-4424.


© 2006 copyright by Zhenhao Duan Research Group, Institute of Geology and Geophysics, Chinese Academy of Sciences. All rights reserved.