Abstract
The results of multicomponent experiments with mass transfer at the air-water interface are analyzed using the indirect approach of fitting overall mass transfer rate constants to the two-resistance model with appropriate corrections for molecular diffusivities. We show that the ratio of mass transfer coefficients (kG/kL) is significantly smaller than the suggested value of kG/kL = 150 customarily used to model surface aeration, bubble aeration, and countercurrent packed columns. Hence the gas-phase resistance has been underestimated, which can lead to the overestimation of overall mass transfer rate constants. Also, kG/kL varies for a given process depending on the hydrodynamic conditions.
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Munz, C., Roberts, P.V. (1984). The Ratio of Gas-Phase to Liquid-Phase Mass Transfer Coefficients in Gas-Liquid Contacting Processes. In: Brutsaert, W., Jirka, G.H. (eds) Gas Transfer at Water Surfaces. Water Science and Technology Library, vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1660-4_4
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DOI: https://doi.org/10.1007/978-94-017-1660-4_4
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