Thermodynamics

A new one parameter viscosity model for binary mixtures

  1. Sheng Fang1,2,
  2. Chao-Hong He1,*

Article first published online: 12 APR 2010

DOI: 10.1002/aic.12272

Issue

AIChE Journal

AIChE Journal

Volume 57, Issue 2, pages 517–524, February 2011

Additional Information

How to Cite

Fang, S. and He, C.-H. (2011), A new one parameter viscosity model for binary mixtures. AIChE J., 57: 517–524. doi: 10.1002/aic.12272

Author Information

  1. 1

    State Key Laboratory of Chemical Engineering, Dept. of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China

  2. 2

    College of Food Science and Biotechnology Engineering, Zhejiang Gongshang University, Hangzhou 310035, China

*State Key Laboratory of Chemical Engineering, Dept. of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China

Publication History

  1. Issue published online: 12 APR 2010
  2. Article first published online: 12 APR 2010
  3. Accepted manuscript online: 12 APR 2010 12:00AM EST
  4. Manuscript Received: 31 MAR 2010

Funded by

  • National Natural Science Foundation of the People's Republic of China. Grant Number: project-no: 20876131
  • Zhejiang Provincial Natural Science Foundation of China. Grant Number: project-no: R4090358

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Keywords:

  • one parameter viscosity model;
  • Eyring;
  • absolute reaction rate theory;
  • Flory-Huggins equation;
  • molecular surface fraction

Abstract

The Grunberg & Nissian equation with one parameter is widely recommended in the viscosity calculation. However, it is demonstrated that this equation fails to generate satisfactory results for size-asymmetric mixtures containing large and small molecules. In this work, a new one parameter viscosity model for binary mixtures has been developed on the basis of Eyring's absolute reaction rate theory and the Flory-Huggins equation. The concept of molecular surface fraction is introduced for modeling liquid mixture viscosities. The viscosity calculations of the new equation are compared with the Grunberg & Nissian equation for a broad range of chemical mixtures including 527 binary systems (containing 63 binary ionic liquid cosolvent systems) and total 17,268 viscosity points. The new equation was found to have an improved performance over the frequently employed Grunberg & Nissian equation, especially for size-asymmetric mixtures containing large and small molecules. © 2010 American Institute of Chemical Engineers AIChE J, 57: 517–524, 2011

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