A Review on Gas-Liquid Mass Transfer Coefficients in Packed-Bed Columns

This review provides a thorough analysis of the most famous mass transfer models for random and structured packed-bed columns used in absorption/stripping distillation processes, providing detailed description equations to calculate parameters, i.e., gas-side coefficient per unit surface ky [kmol·m?2·s?1], liquid-side kx interfacial packing area ae [m2·m?3], which constitute ingredients assess rate columns. The have been reported original form provided by authors together with geometric model fitting parameters published several papers allow their adaptation packings different from those covered papers. Although work is focused on collection carefully described ready-to-use equations, we tried underline criticalities behind these models, mostly rely assessment fluid-dynamics such as liquid film thickness, hold-up area, or real paths any mal-distributions flow. To this end, paper reviewed novel experimental simulation approaches aimed better describe gas-liquid multiphase flow dynamics column, e.g., using optical technologies (tomography) CFD simulations. While results studies may not be easily extended full-scale columns, improved estimation main fluid-dynamic will provide more accurate modelling correlation liquid-gas phenomena packed