地质学报2011，Vol.85Issue(7)：1079-1093,15.DOI:11-1951/P.20110715.0858.016
气体(CH4、H2S、CO2等)在水溶液中的溶解度模型
Model for the Calculation of the Solubility of CH4, H2S and CO2in Aqueous Solutions
摘要
Abstract
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 (CO) in pure water and in aqueous salt solution over a large range of temperature, pressure and salt concentrations (273-523K, 1-2000 bar, 0-6m for CH4; 273-500K, 0-200bar, 0-6m for H2S; 273-533K, 0-2000bar, 0-4. 5m for CO2), 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, such as seawater and geothermal brines, without fitting experimental data from these 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 CH Hydrate's formation, and even CO2 sequestration. Online calculation of the solubility of these gases is available at; www. Geochem- model.关键词
气体溶解度/地质流体/成矿流体/包裹体/CO2储藏/甲烷水合物Key words
gas solubility/ geofluids/ mineralization fluids/ fluid inclusion/ CO/ sequestration/ CH4 hydrate引用本文复制引用
段振豪,卫清..气体(CH4、H2S、CO2等)在水溶液中的溶解度模型[J].地质学报,2011,85(7):1079-1093,15.基金项目
本文为国家基金委重点项目(编号40537032),中国科学院重要方向项目(编号kzcx2-yw-124)资助的成果. （编号40537032）
