Thermodynamic and Dynamic Interfacial Properties of Binary Carbon Dioxide−Water Systems
Thermodynamic and Dynamic Interfacial Properties of Binary Carbon Dioxide−Water Systems
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DOI：
10.1021/jp030895c
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发表时间：
2004-01
影响因子：
3.3
通讯作者：
Frédéric Tewes and;F. Boury
中科院分区：
文献类型：
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作者：
Frédéric Tewes and;F. Boury
我们使用液滴张力计测量了 H2O 和 CO2 之间的界面张力 (γ)，这使我们能够调节液滴面积并执行弹性测量。我们观察到 γ 随着时间和 CO2 压力的变化而减小。我们首先通过绘制初始界面张力 (γ0) 与 CO2 逸度的关系图来分析 CO2 在地表水中的吸附，并应用 Gibbs 方程和 Langmuir-Freundlich 方程。我们计算了CO2分子在H2O上占据的界面面积以及吸附的平衡常数和热力学参数。这让我们了解到，CO2 通过与 H2O 形成一对一的 H 型复合物而被吸附到地表水中。其次，我们将动力学现象归因于水和 CO2 之间界面簇的形成，这给出了界面准晶体结构，如吸附动力学结束时液滴区域的压缩所示。我们通过测量应用来研究这种界面组织...
We have measured the interfacial tension (γ) between H2O and CO2 with a drop tensiometer that permitted us to regulate the drop area and to perform elasticity measurements. We observed that γ decreased with time and with the CO2 pressure. We first analyzed the adsorption of CO2 onto surface water by plotting the initial interfacial tension (γ0) versus CO2 fugacity and applied Gibbs and then Langmuir-Freundlich equations. We have calculated the interfacial area occupied by CO2 molecules onto H2O as well as the equilibrium constant and the thermodynamics parameters of adsorption. This permitted us to understand that the CO2 was adsorbed onto the surface water by formation of a one-to-one H-type complex with H2O. Second, we attributed the kinetics phenomena to the formation of interfacial clusters between water and CO2, which gave interfacial quasi-crystalline structure as shown by compression of the drop area at the end of the adsorption kinetics. We studied this interfacial organization by measuring the ap...