Modeling of Surface Tension and Viscosity for Non-electrolyte Systems by Means of the Equation of State for Square-well Chain Fluids with Variable Interaction Range

›› 2011, Vol. 19 ›› Issue (4): 533-543.

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Modeling of Surface Tension and Viscosity for Non-electrolyte Systems by Means of the Equation of State for Square-well Chain Fluids with Variable Interaction Range

李进龙, 何昌春, 马俊, 彭昌军, 刘洪来, 胡英

State Key Laboratory of Chemical Engineering and Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China

收稿日期:2010-11-04 修回日期:2011-05-21 出版日期:2011-08-28 发布日期:2011-08-28
通讯作者: PENG Changjun,E-mail:cjpeng@ecust.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(20776040,20876041,20736002),the National Basic Research Program of China(2009CB219902),the Program for Changjiang Scholars and Innovative Research Team in University of China(Grant IRT0721)and the 111 Project(Grant B08021)of China.

Modeling of Surface Tension and Viscosity for Non-electrolyte Systems by Means of the Equation of State for Square-well Chain Fluids with Variable Interaction Range

LI Jinlong, HE Changchun, MA Jun, PENG Changjun, LIU Honglai, HU Ying

State Key Laboratory of Chemical Engineering and Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China

Received:2010-11-04 Revised:2011-05-21 Online:2011-08-28 Published:2011-08-28
Supported by:
Supported by the National Natural Science Foundation of China(20776040,20876041,20736002),the National Basic Research Program of China(2009CB219902),the Program for Changjiang Scholars and Innovative Research Team in University of China(Grant IRT0721)and the 111 Project(Grant B08021)of China.

摘要/Abstract

摘要： The equation of state(EOS)for square-well chain fluid with variable range(SWCF-VR) developed in our previous work based on statistical mechanical theory for chemical association is employed for the correlations of surface tension and viscosity of common fluids and ionic liquids(ILs).A model of surface tension for multi-component mixtures is presented by combining the SWCF-VR EOS and the scaled particle theory and used to produce the surface tension of binary and ternary mixtures.The predicted surface tensions are in excellent agreement with the experimental data with an overall average absolute relative deviation(AAD)of 0.36%.A method for the calculation of dynamic viscosity of common fluids and ILs at high pressure is presented by combining Eyring's rate theory of viscosity and the SWCF-VR EOS.The calculated viscosities are in good agreement with the experimental data with the overall AAD of 1.44% for 14 fluids in 84 cases.The salient feature is that the molecular parameters used in these models are self-consistent and can be applied to calculate different thermodynamic properties such as pVT, vapor-liquid equilibrium, caloric properties, surface tension, and viscosity.

关键词: surface tension, viscosity, equation of state, square-well chain, scaled particle theory, Eyring's theory, ionic liquid

Abstract: The equation of state(EOS)for square-well chain fluid with variable range(SWCF-VR) developed in our previous work based on statistical mechanical theory for chemical association is employed for the correlations of surface tension and viscosity of common fluids and ionic liquids(ILs).A model of surface tension for multi-component mixtures is presented by combining the SWCF-VR EOS and the scaled particle theory and used to produce the surface tension of binary and ternary mixtures.The predicted surface tensions are in excellent agreement with the experimental data with an overall average absolute relative deviation(AAD)of 0.36%.A method for the calculation of dynamic viscosity of common fluids and ILs at high pressure is presented by combining Eyring's rate theory of viscosity and the SWCF-VR EOS.The calculated viscosities are in good agreement with the experimental data with the overall AAD of 1.44% for 14 fluids in 84 cases.The salient feature is that the molecular parameters used in these models are self-consistent and can be applied to calculate different thermodynamic properties such as pVT, vapor-liquid equilibrium, caloric properties, surface tension, and viscosity.

Key words: surface tension, viscosity, equation of state, square-well chain, scaled particle theory, Eyring's theory, ionic liquid

李进龙, 何昌春, 马俊, 彭昌军, 刘洪来, 胡英. Modeling of Surface Tension and Viscosity for Non-electrolyte Systems by Means of the Equation of State for Square-well Chain Fluids with Variable Interaction Range[J]. , 2011, 19(4): 533-543.

LI Jinlong, HE Changchun, MA Jun, PENG Changjun, LIU Honglai, HU Ying. Modeling of Surface Tension and Viscosity for Non-electrolyte Systems by Means of the Equation of State for Square-well Chain Fluids with Variable Interaction Range[J]. , 2011, 19(4): 533-543.

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Modeling of Surface Tension and Viscosity for Non-electrolyte Systems by Means of the Equation of State for Square-well Chain Fluids with Variable Interaction Range

Modeling of Surface Tension and Viscosity for Non-electrolyte Systems by Means of the Equation of State for Square-well Chain Fluids with Variable Interaction Range

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