Variation of Liquid Diffusion Coefficients with Composition. Binary Systems

Abstract

The predictive capability of the Vignes equation is limited, with considerable deviations encountered in a number of systems. A modification of this expression is developed accounting for solution viscosity. Comparison with data for a large number of known systems shows that this modified version improves the over-all predictability. The concept of segmental diffusion is used to explain the results for mixtures of n-alkanes.

Prediction of binary diffusion coefficients in non-ideal mixtures from NMR data: Hexane–nitrobenzene near its consolute point

“…(3), there have been many attempts to validate or improve on this correction factor (Gordon, 1937;Powell et al, 1941;Darken, 1948;Hartley and Crank, 1949;Wilke, 1949;Carman and Stein, 1956;Vignes, 1966;Rathbun and Babb, 1966;Leffler and Cullinan, 1970;Gainer, 1970;Turner, 1974Turner, , 1975Cussler, 1980;Gürkan, 1987;Gulari, 1984, 1989;Cullinan, 1985;Clark and Rowley, 1986;Siddiqi et al, 1987;Wu et al, 1988;Rollins and Knaebel, 1991;Matos Lopes et al, 1992;Pertler et al, 1996;Hsu and Chen, 1998;Hsu et al, 2000;Li et al, 2001;Bosse and Bart, 2006). Pertler et al (1996) conclude that the Schreiner equation is adequate to describe a range of non-ideal mixtures which they studied, but none of those was close to its consolute point.…”

Thermodiffusion of the tetrahydronaphthalene and dodecane mixture under high pressure and in porous medium

“…From fitting experimental points we have determined the Soret and the diffusion coefficients in porous medium S T and D * . By using a Leffler-Cullinan relation [25], it is also possible to get an evaluation of the molecular diffusion coefficient in free media D as a function of the pressure:…”

Developing a feed forward neural network multilayer model for prediction of binary diffusion coefficient in liquids

“…Leffler and Cullinan [8] developed the Vignes equation [7] by incorporating the effect of viscosity of solution and each pure component. The proposed model was slightly more accurate than prior models.…”