Restrictions on Friction Coefficients for Binary and Ternary Diffusion

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• 作者：James S. Vrentas ; Christine M. Vrentas
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2007
• 出版时间：May 9, 2007
• 年：2007
• 卷：46
• 期：10
• 页码：3422 - 3428
• 全文大小：56K
• 年卷期：v.46,no.10(May 9, 2007)
• ISSN：1520-5045

文摘

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