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A Review on Gas-Liquid Mass Transfer Coefficients in Packed-Bed Columns
| Content Provider | MDPI |
|---|---|
| Author | Flagiello, Domenico Parisi, Arianna Lancia, Amedeo Natale, Francesco Di |
| Copyright Year | 2021 |
| Description | This review provides a thorough analysis of the most famous mass transfer models for random and structured packed-bed columns used in absorption/stripping and distillation processes, providing a detailed description of the equations to calculate the mass transfer parameters, i.e., gas-side coefficient per unit surface $k_{y}$ $[kmol·m^{−2}·s^{−1}$], liquid-side coefficient per unit surface $k_{x}$ $[kmol·m^{−2}·s^{−1}$], interfacial packing area $a_{e}$ $[m^{2}·m^{−3}$], which constitute the ingredients to assess the mass transfer rate of packed-bed columns. The models have been reported in the original form provided by the authors together with the geometric and model fitting parameters published in several papers to allow their adaptation to packings different from those covered in the original papers. Although the work is focused on a collection of carefully described and ready-to-use equations, we have tried to underline the criticalities behind these models, which mostly rely on the assessment of fluid-dynamics parameters such as liquid film thickness, liquid hold-up and interfacial area, or the real liquid paths or any mal-distributions flow. To this end, the paper reviewed novel experimental and simulation approaches aimed to better describe the gas-liquid multiphase flow dynamics in packed-bed column, e.g., by using optical technologies (tomography) or CFD simulations. While the results of these studies may not be easily extended to full-scale columns, the improved estimation of the main fluid-dynamic parameters will provide a more accurate modelling correlation of liquid-gas mass transfer phenomena in packed columns. |
| Starting Page | 43 |
| e-ISSN | 23057084 |
| DOI | 10.3390/chemengineering5030043 |
| Journal | ChemEngineering |
| Issue Number | 3 |
| Volume Number | 5 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-08-02 |
| Access Restriction | Open |
| Subject Keyword | ChemEngineering Chemengineering Analytical Chemistry Separation Technologies Unit Operations Gas-liquid Mass Transfer Mass Transfer Review Mass Transfer Coefficients for Packed Columns Structured Packing Random Packing Absorption Column Stripping Column Distillation Column Cooling Tower |
| Content Type | Text |
| Resource Type | Article |
