中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
An accurate model to predict the thermodynamic stability of methane hydrate and methane solubility in marine environments

文献类型:期刊论文

作者Sun, Rui; Duan, Zhenhao
刊名CHEMICAL GEOLOGY
出版日期2007-09-30
卷号244期号:1-2页码:248-262
关键词methane hydrate model solubility marine sediments thermodynamic stability seawater
ISSN号0009-2541
DOI10.1016/j.chemgeo.2007.06.021
文献子类Article
英文摘要An accurate thermodynamic model is proposed to predict the thermodynamic stability of methane hydrate in marine environments and methane concentration needed to form hydrate in the absence of gas phase. Taking into account the effect of capillary force and salinity on chemical potential of CH4 and H2O, this study extends the Van der Waals-Platteeuw model and our approach to calculate the Langmuir constant from angle-dependent ab initio intermolecular potentials to marine environments. The Gibbs-Thomson equation with correct parameters for hydrate-water interface is used to account for the capillary effect of porous sediments. The Pitzer model is used to calculate the activity coefficients Of H2O and CH4 in methane-seawater system. Comparison with the experimental data shows that this model can predict the equilibrium P-Tcondition of CH4 hydrate in porous media and predict CH4 solubility at hydrate-water equilibrium with high accuracy. The prediction of this model shows that CH4 solubility in liquid phase at hydrate-liquid equilibrium will be reduced by increasing salinity, but it will be increased by reducing pore sizes of porous sediments. Online calculations of the P-T condition for the formation of methane hydrate and the methane solubility at a given salinity and pore sizes of sediments is made available on: www.geochem-model.org/models.htm. (C) 2007 Elsevier B.V. All rights reserved.
WOS关键词PORE-SIZE DISTRIBUTIONS ; MIXED ELECTROLYTE-SOLUTIONS ; SILICA-GEL PORES ; GAS HYDRATE ; PHASE-EQUILIBRIA ; POROUS-MEDIA ; CARBON-DIOXIDE ; MESOPOROUS SILICA ; DISSOCIATION CONDITIONS ; SURFACE-TENSION
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000250122300015
出版者ELSEVIER SCIENCE BV
源URL[http://ir.iggcas.ac.cn/handle/132A11/67872]  
专题中国科学院地质与地球物理研究所
通讯作者Duan, Zhenhao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Evolut, Beijing 100029, Peoples R China
2.Univ Henri Poincare, Fac Sci, CREGU, UMR G2R, F-54500 Vandoeuvre Les Nancy, France
推荐引用方式
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Sun, Rui,Duan, Zhenhao. An accurate model to predict the thermodynamic stability of methane hydrate and methane solubility in marine environments[J]. CHEMICAL GEOLOGY,2007,244(1-2):248-262.
APA Sun, Rui,&Duan, Zhenhao.(2007).An accurate model to predict the thermodynamic stability of methane hydrate and methane solubility in marine environments.CHEMICAL GEOLOGY,244(1-2),248-262.
MLA Sun, Rui,et al."An accurate model to predict the thermodynamic stability of methane hydrate and methane solubility in marine environments".CHEMICAL GEOLOGY 244.1-2(2007):248-262.

入库方式: OAI收割

来源:地质与地球物理研究所

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