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A predictive theory for diffusion in mixed solvents
Author(s) -
Cullinan Harry T.,
Cusick M. R.
Publication year - 1967
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690130625
Subject(s) - limiting , thermodynamics , diffusion , chemistry , additive function , solvent , effective diffusion coefficient , activation energy , organic chemistry , mathematics , mathematical analysis , physics , mechanical engineering , medicine , radiology , magnetic resonance imaging , engineering
A relationship for the diffusion coefficient of a dilute species in a mixture of two solvents is developed. The result, based on the linear additivity of the frictional activation energy which is valid for completely miscible, nonassociated systems, predicts the diffusion coefficient of the solute in terms of the limiting values of the diffusion coefficient of the solute in each of the solvents, the limiting values of the solvent pair diffusion coefficient, and two thermodynamic factors. The equation is confirmed for some recent experimental data.