Restrictions on friction coefficients for binary and ternary diffusion

James S. Vrentas, Christine M. Vrentas

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


A friction coefficient formalism provides a convenient method of relating mutual diffusion coefficients and self-diffusion coefficients. However, all of the friction coefficients cannot be eventually eliminated from the analysis unless additional equations relating the friction coefficients are proposed. Restrictions on friction coefficients are useful ways of eliminating proposed possibilities for friction coefficient relationships. In this study, we consider whether the entropy inequality and the Gibbs-Duhem equation produce useful restrictions on proposed friction coefficient relationships for binary and ternary diffusion. In addition, two practical restrictions on friction coefficients are considered, and a new set of equations is derived for the four mutual diffusion coefficients for a ternary system.

Original languageEnglish (US)
Pages (from-to)3422-3428
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Issue number10
StatePublished - May 9 2007

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering


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