BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
The theory of the Taylor dispersion technique for liquid diffusivity measurements

Participants in the publication
A. Alizadeh (Author)
IMPERIAL COLLEGE LONDON
C. A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
W. A. Wakeham (Author)
IMPERIAL COLLEGE LONDON

Summary
This paper presents a complete analysis of the theory of an instrument to measure\nthe diffusion coefficients in liquid mixtures based upon the phenomenon of Taylor\ndispersion. The analysis demonstrates that it is possible to design an instrument\nthat operates very nearly in accordance with the simplest mathematical description\nof the dispersion of a solute pulse in a fluid in laminar flow within a straight,\ncircular cross-section tube. The small departures of a practical instrument from\nthe ideal are evaluated as corrections by means of a general perturbation treatment\nthat allows them to be examined one at a time. The corrections considered include\nthe effects of the finite volume of the injection pulse, the finite volume of the\nconcentration monitor, the coiling of the tube, and the nonuniformity and noncircularity\nof the cross section, as well as the variation of the fluid properties with\ncomposition. All the equations necessary for the design of an instrument of this\ntype, and for the evaluation of experimental data free from significant systematic\nerrors, are presented.


Institution
INSTITUTO SUPERIOR TÉCNICO

Where published
International Journal of Thermophysics

Publication Identifiers

Publisher
Springer Science and Business Media LLC



Document Identifiers
DOI - https://doi.org/10.1007/bf00517126
URL - http://dx.doi.org/10.1007/bf00517126

Keywords
diffusion coefficient liquid mixtures Taylor dispersion liquid diffusion

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