Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1490, Issue -, Pages 133-137Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2017.02.026
Keywords
Axial dispersion coefficient; Peclet number; Empirical correlation; Mass transfer; Liquid chromatography; Adsorption
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In this work, a new correlation for the axial dispersion coefficient was obtained using experimental data in the literature for axial dispersion in fixed-bed columns packed with particles. The Chung and Wen correlation, the De Ligny correlation are two popular empirical correlations. However, the former lacks the molecular diffusion term and the latter does not consider bed voidage. The new axial dispersion coefficient correlation in this work was based on additional experimental data in the literature by considering both molecular diffusion and bed voidage. It is more comprehensive and accurate. The Peclet number correlation from the new axial dispersion coefficient correlation on the average leads to 12% lower Peclet number values compared to the values from the Chung and Wen correlation, and in many cases much smaller than those from the De Ligny correlation. (C) 2017 Elsevier B.V. All rights reserved.
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