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1 INTRODUCTIONAccurate data on molecular diffusion are required for the design of chemical and physi-cal processes where mass transfer plays an important role.Expressions for estimatingtracer diffusion coefficients(i.e.binary diffusion coefficients at infinite dilution)areavailable for a number of different systems .The Akgerman and Gainer equa-tion has been known to give good predictions for the diffusion coefficients of gases inliquids.This study provides an approximation approach for predicting diffusioncoefficients of binary liquid systems from their viscosities.
1 INTRODUCTIONAccurate data on molecular diffusion are required for the design of chemical and physi-cal processes where mass transfer plays an important role. Expressions for estimatingtrace diffusion coefficients (iebinary diffusion coefficients at infinite dilution) area available for a number of different systems. Akgenman and Gainer equa- tion have been known to give good predictions for the diffusion coefficients of gases in liquids. This study provides an approximation approach for predicting diffusion coefficiencies of binary liquid systems from their viscosities.