Kinetic description of ion transport in the system "ionic solution -- porous environment"

Vapour-liquid critical parameters of a $2$:$1$ primitive model of ionic fluids confined in disordered porous media

We study the vapour-liquid critical parameters of an ionic fluid confined in a disordered porous medium by using the theory which combines the collective variables approach with an extension of the scaled particle theory. The ionic fluid is described as a two-component charge- and size-asymmetric primitive model, and a porous medium is modelled as a disordered matrix formed by hard-spheres obstacles. In the particular case of the fixed valencies $2$:$1$, the coexistence curves and the corresponding critical parameters are calculated for different matrix porosities as well as for different diam…

Vapour-liquid phase diagram for an ionic fluid in a random porous medium

We study the vapour-liquid phase behaviour of an ionic fluid confined in a random porous matrix formed by uncharged hard sphere particles. The ionic fluid is modelled as an equimolar binary mixture of oppositely charged equisized hard spheres, the so-called restricted primitive model (RPM). Considering the matrix-fluid system as a partly-quenched model, we develop a theoretical approach which combines the method of collective variables with the extension of the scaled-particle theory (SPT) for a hard-sphere fluid confined in a disordered hard-sphere matrix. The approach allows us to formulate …

动态多孔介质中电解质离子输运动力学过程的一致描述

A consistent description of the kinetic processes of electrolyte ion transport in a dynamic porous medium

本文将动力学与流体动力学过程的一致描述应用于离子溶液-多孔介质系统，通过分数阶微积分技术推导出Cattaneo型广义扩散方程，以描述多孔介质中粒子的亚扩散过程。

Ionic Reactions in Two Dimensions with Disorder

We analyze the dynamics of the ion-dipole pairing reaction in the two-dimensional Coulomb gas in the presence of disorder. Sufficiently singular disorder forces the critical temperature of the Kosterlitz-Thouless-Berezinskii fixed point to be non-universal. This disorder leads to anomalous ion pairing kinetics with a continuously variable decay exponent. Sufficiently strong disorder eliminates the transition altogether. For ions that are chemically reactive, anomalous kinetics with a continuously variable decay exponent also occurs in the high-temperature regime. The Coulomb interaction inhibi…

Are Room Temperature Ionic Liquids Dilute Electrolytes?

An important question in understanding the structure of ionic liquids is whether ions are truly "free" and mobile which would correspond to a concentrated ionic melt, or are rather "bound" in ion pairs, that is a liquid of ion pairs with a small concentration of free ions. Recent surface force balance experiments from different groups have given conflicting answers to this question. We propose a simple model for the thermodynamics and kinetics of ion pairing in ionic liquids. Our model takes into account screened ion-ion, dipole-dipole and dipole-ion interactions in the mean field limit. The r…

弹性异质性支配了软多孔晶体中的异常尺度行为

Elastic heterogeneity governs anomalous scaling in a soft porous crystal

研究揭示弹性异质性通过调控吸附动力学，导致软多孔晶体中出现尺寸依赖性吸收、表面褶皱及异常动态尺度等现象。