Determination of mass transfer coefficients in high-pressure two-phase flows in capillaries using Raman spectroscopy - Archive ouverte HAL Access content directly
Journal Articles Chemical Engineering Science Year : 2020

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

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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.
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Dates and versions

hal-02899660 , version 1 (08-09-2020)

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Thomas Deleau, Michael Fechter, Jean‐jacques Letourneau, Séverine Camy, Joelle Aubin, et al.. Determination of mass transfer coefficients in high-pressure two-phase flows in capillaries using Raman spectroscopy. Chemical Engineering Science, 2020, 228, pp.1-15/115960. ⟨10.1016/j.ces.2020.115960⟩. ⟨hal-02899660⟩
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