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

作　　者：LU XIaoHua JI YuanHui LIU HongLai 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China [2]State Key Laboratory of Chemical Engineering East China University of Seience and Technology, Shanghai 200237, China

出　　处：《Science China Chemistry》2011年第10期1659-1666,共8页中国科学（化学英文版）

基　　金：supported by the Chinese National Key Technology Research and Development Program (2006AA03Z455);the National Natural Science Foundation of China (NSFC);the National Natural Science Foundation of China (20976080, 20736002);the Research Grants Council(RGC) of Hong Kong Joint Research Scheme (JRS) (20731160614);Program for Changjiang Scholars and Innovative Research Team in University (IRT0732);National Basic Research Program of China (2009CB226103)

摘　　要：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 thermo-dynamics 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.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 thermo-dynamics 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.

关 键 词：chemical engineering non-equilibrium thermodynamics interface transport process rate 

分 类 号：TQ423.2[化学工程] TK123[动力工程及工程热物理—工程热物理]