Model for the Calculation of the Solubility of CH4, H2S and CO2 in Aqueous Solutions
详细信息
- 责任者：Duan Zhenhao (Key Laboratory of the Earth’s Deep Interior ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Wei Qing
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(7)
- 关键词：气体 ; gases ; 水溶液 ; aqueous solutions ; 溶解度 ; solubility
- 页码：p.1079-1093
- 图表：7 illus., 6 tables, 53 refs.
- 分类号：0600
- 出版序号：786
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
///Equations of state (EOS) can be used to construct solubility model of gases in aqueous solutions. A thermodynamic model is introduced to predict the solubility of methane (CH4), hydrogen sulfide (H2S), and carbon dioxide (CO2) in pure water and in aqueous salt solution over a large range of temperature, pressure and salt concentrations, with accuracy equivalent to that of reliable experiments. With the specific interaction approach, this model is not only able to predict gas solubility in NaCl solutions, but also other more complex systems. The model finds wide applications in the study of solubility of gases in nature aqueous solutions with different temperatures, pressures and salt conditions,and can also analyze the PVTX conditions of fluid inclusions, calculate the immiscibility of mineralization fluids, the minimum conditions of CH4 hydrate’s formation, and even CO2 sequestration.
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