Non-equilibrium thermodynamics analysis and its application in interfacial mass transfer

Abstract

Interfacial transfer plays an important role in multi-phase chemical processes. However, it is difficult to describe the complex interfacial transport behavior by the traditional mass transfer model. In this paper, we describe an interfacial mass transfer model based on linear non-equilibrium thermodynamics for the analysis of the rate of interfacial transport. The interfacial transfer process rate J depends on the interface mass transfer coefficient K, interfacial area A and chemical potential gradient  at the interface. Potassium compounds were selected as model systems. A model based on linear non-equilibrium thermodynamics was established in order to describe and predict the transport rate at the solid-solution interface. Together with accurate experimental kinetic data for potassium ions obtained using ion-selective electrodes, a general model which can be used to describe the dissolution rate was established and used to analyze ways of improving the process rate. chemical engineering, non-equilibrium thermodynamics, interface transport, process rate

Modeling mass transfer of CO2 in brine at high pressures by chemical potential gradient

“…In this case, chemical potential gradient should be used as the driving force. Our previous work based on non-equilibrium thermodynamics [21][22][23] also reveals that it is necessary to consider the non-ideality of such complex systems.…”

Methodology of non-equilibrium thermodynamics for kinetics research of CO2 capture by ionic liquids

“…Based on our previous work of linear non-equilibrium thermodynamic investigations on the dissolution and crystallization kinetics of potassium inorganic compounds [31][32][33], in this paper, the kinetic process of CO 2 absorption by ionic liquids is assumed to comprise two steps: surface reaction and diffusion, which is shown in Figure 1. As shown in Figure 1, when CO 2 in the vapor phase and the ionic liquids are in contact, for the chemical absorption process of CO 2 by ionic liquids in the first step, the chemical reaction of CO 2 with ionic liquids takes place, which is called the surface reaction layer; for the physical absorption process of CO 2 by ionic liquids in the first step, CO 2 in the vapor phase will be transferred into the ionic liquid phase, which could also be called the assumed "surface reaction layer".…”

“…Non-equilibrium thermodynamic principles [33][34][35] mainly focus on the entropy production of the systems due to the irreversible process. When the system is close to the equilibrium state (or the deviation from the equilibrium state is not far), the generalized flux is linearly related to the gen- eral driving force [33][34][35], namely…”

“…When the system is close to the equilibrium state (or the deviation from the equilibrium state is not far), the generalized flux is linearly related to the gen- eral driving force [33][34][35], namely…”

“…The non-equilibrium thermodynamic model of CO 2 absorption kinetics by ionic liquids could be investigated on the basis of the schematic diagram of CO 2 absorption kinetics process by ionic liquids shown in Figure 1 and our previous linear non-equilibrium thermodynamic investigations on the dissolution and crystallization kinetics of potassium inorganic compounds [31][32][33]. In this paper, the surface reaction rate and diffusion rate will be described using the linear non-equilibrium thermodynamic theory.…”