Journal
FLUID PHASE EQUILIBRIA
Volume 228, Issue -, Pages 357-366Publisher
ELSEVIER
DOI: 10.1016/j.fluid.2004.08.017
Keywords
diffusion coefficient; spectroscopy; experimental method; inverse problem
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Diffusion in liquids can still be predicted only with high uncertainty due to the lack of sufficient experimental data. Diffusion experiments are complex and time-consuming. Furthermore, the concentration dependence of the diffusion coefficients requires usually several experiments even for binary mixtures. The possibility to extract this information from one short Raman diffusion experiment is explored here. A general identification framework is provided which does not require the a priori specification of a diffusion coefficient model structure but establishes the concentration dependence directly from the data. The methodology is used to determine the diffusion coefficient in the mixture ethyl acetate-cyclohexane in a wide concentration range. (c) 2004 Elsevier B.V. All rights reserved.
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