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Main Title: Composition dependent transport diffusion in non-ideal mixtures from spatially resolved nuclear magnetic resonance spectroscopy
Author(s): Pantoja, Christian F.
Muñoz-Muñoz, Y. Mauricio
Guastar, Lorraine
Vrabec, Jadran
Wist, Julien
Type: Article
Language Code: en
Abstract: Nuclear magnetic resonance (NMR) spectroscopy is a well-established technique for the measurement of intra-diffusion coefficients. Recently, such information has been used as a basis of predictive models to extrapolate to the Fick diffusion coefficient of liquid mixtures. The present work presents a new approach to directly access the Fick diffusion coefficient by spatially resolved NMR experiments. The Fick diffusion coefficient of the binary mixture TEA/H2O was determined at two temperatures, 283.2 K and 275.2 K. The results are consistent with values previously reported either from optical experiments or predictive Darken-type models developed for this system. The proposed methodology adds high-resolution NMR to the toolbox for the study of the transport diffusion of multicomponent mixtures. It is, however, still limited to mixtures with liquid–liquid equilibrium phase separation.
Issue Date: 16-Oct-2018
Date Available: 11-Apr-2019
DDC Class: 540 Chemie und zugeordnete Wissenschaften
530 Physik
Journal Title: Physical Chemistry, Chemical Physics
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 20
Issue: 44
Publisher DOI: 10.1039/C8CP05539D
Page Start: 28185
Page End: 28192
EISSN: 1463-9084
ISSN: 1463-9076
Appears in Collections:FG Thermodynamik und Thermische Verfahrenstechnik » Publications

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