H2/H2O/NaCl系统的界面张力,溶解度和运输特性:一个分子模拟研究
W A van Rooijen1, P Habibi2,3, K Xu3
1Reservoir Engineering, Geoscience and Engineering Department, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628CN, Delft, The Netherlands.
Journal of chemical and engineering data
|February 14, 2024
概括
这项研究为水溶液中的 (H2) 提供了关键的热力学和运输数据,对于地下H2储存和H2O电解等技术至关重要. 模拟产生了新的数据集,用于界面张力,自我扩散性和可溶性,与高精度的实验数据进行验证.
科学领域:
- 物理化学 物理化学
- 计算化学计算化学
- 材料科学 材料科学 材料科学
背景情况:
- 对于关键应用,缺少 (H2) 的关键热力学和运输数据.
- 像地下H2储存和H2O电解等技术需要这些缺失的数据.
研究的目的:
- 为了解决水溶液中 (H2) 数据的稀缺问题.
- 提供新的数据集,用于介面张力,自我扩散率和H2.2的溶解度.
- 支持技术的发展.
主要方法:
- 使用了分子动力学 (MD) 和连续分数组件蒙特卡洛 (CFCMC) 模拟.
- 使用已建立的力场:H2O的TIP4P/2005,NaCl的马德里-2019/马德里运输,H2的Vrabec/Marx.
- 模拟了广泛的温度,压力和NaCl度.
主要成果:
- 用NaCl溶液 (298523 K,1600 bar,06 mol NaCl/kg H2O) 产生了H2界面张力的广泛数据集.
- 提供了关于NaCl溶液 (298723 K,11000 bar, 06 mol NaCl/kg H2O) 中的H2自扩散率的新数据.
- 在NaCl溶液 (298363 K,11000 bar,06 mol NaCl/kg H2O) 中计算的H2溶解度.
结论:
- 模拟结果与现有实验数据非常一致,平均偏差低于10%.
- 生成的数据填补了关键的空白,使技术的建模和设计更准确.
- 这项工作验证了选择的模拟方法和力场,用于预测水性电解质溶液中的H2特性.
相关概念视频
Intermolecular Forces and Physical Properties
20.8K
20.8K
Intermolecular Forces in Solutions
33.7K
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
33.7K
Intermolecular Forces
58.3K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
58.3K
Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility
44.3K
Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
44.3K
Aqueous Solutions and Heats of Hydration
14.7K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.7K
Entropy and Solvation
7.1K
The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
7.1K


