The solubility of CO2 + H2S mixtures in water and 2 M NaCl at 120 °C and pressures up to 35 MPa
The solubility of CO2 + H2S mixtures in water and 2 M NaCl at 120 °C and pressures up to 35 MPa
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DOI：
10.1016/j.ijggc.2012.05.021
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发表时间：
2012-09
影响因子：
3.9
通讯作者：
V. Savary;G. Berger;M. Dubois;J. Lacharpagne;A. Pages;S. Thibeau;M. Lescanne
中科院分区：
文献类型：
--
作者：
V. Savary;G. Berger;M. Dubois;J. Lacharpagne;A. Pages;S. Thibeau;M. Lescanne
石油和天然气工业产生大量酸性气体。从深层含水层酸性气体地质封存的角度出发，在典型的地质封存条件下，研究了CO2+H2S混合物在纯水和2M NaCl溶液中的溶解度。相平衡测量在 120°C 的温度和 1.7 至 35MPa 的压力范围内进行。将CO2+H2S的均质混合物（H2S体积分数为（0、1/4、1/3、1/2、2/3和1））与溶液接触，通过对溶液连续取样来测量溶解度。通过将纯气体获得的结果与文献数据进行比较来验证所使用的协议。混合物中气体之间的相互作用对其各自的溶解度有很大影响。状态方程模型重现了存在 H2S 时 CO2 溶解度的降低，但低估了 CO2 对 H2S 的排除。
The oil and gas industry produces large quantities of sour gases. In the perspective of the geological storage of acid gases in deep aquifers, the solubility of CO2+H2S mixtures in pure water and in a 2M NaCl solution was studied under conditions typical of geological storage. Phase equilibrium measurements were undertaken at a temperature of 120°C and pressures ranging from 1.7 to 35MPa. Homogeneous mixtures of CO2+H2S with H2S volume fractions of (0, 1/4, 1/3, 1/2, 2/3 and 1) were placed in contact with solution, and solubility was measured by continuous sampling of the solution. The protocol used was validated by comparison of the results obtained on pure gases with literature data. The mutual interaction between the gases in the mixture has a substantial influence on their respective solubilities. Equation-of-state models reproduce the decrease of CO2solubility in the presence of H2S, but underestimate the exclusion of H2S by CO2.