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Determination of mass transfer coefficients in high-pressure two-phase flows in capillaries using Raman spectroscopy

Deleau, Thomas and Fechter, Michael.H.H. and Letourneau, Jean-Jacques and Camy, Séverine and Aubin, Joelle and Braeuer, Andréas S. and Espitalier, Fabienne Determination of mass transfer coefficients in high-pressure two-phase flows in capillaries using Raman spectroscopy. (2020) Chemical Engineering Science, 228. 115960. ISSN 0009-2509

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Official URL: https://doi.org/10.1016/j.ces.2020.115960

Abstract

This study presents a method for the experimental determination of local volumetric mass transfer coefficients kLaL in a high-pressure two-phase flow of water (H2O) and carbon dioxide (CO2) in a micro-capillary using Raman spectroscopy. H2O and CO2 are continuously and co-currently fed at high pressure (8, 9 and 10 MPa) and moderate temperature (303 K) into a fused silica micro-capillary. A segmented two-phase flow is obtained therein and the fraction of CO2 in the water-rich phase is measured in-situ at different points along the capillary using Raman spectroscopy. A modified Henry’s law is used to compute the equilibrium compositions of the water-rich phase at the desired pressure and temperature. A mixture density model is used to convert the fraction of CO2 in the water-rich phase into a CO2 concentration. The volumetric liquid mass transfer coefficient is computed at various axial locations along the capillary, from the contacting zone to the end of the capillary. Experimentally derived kLaL values range between 2.10−3 and 5.10−3 s−1.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Technishe Universität Bergakademie Freiberg (GERMANY)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Funders:
Occitanie region (France)
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Deposited On:15 Jan 2021 08:22

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