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Abstract
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The aim of this review is to investigate a kind of process intensification equipment called
a rotating packed bed (RPB), which improves transport via centrifugal force in the gas—liquid field,
especially by absorption. Different types of RPB, and their advantages and effects on hydrodynamics,
mass transfer, and power consumption under available models, are analyzed. Moreover, different
approaches to the modeling of RPB are discussed, their mass transfer characteristics and hydrodynamic
features are compared, and all models are reviewed. A dimensional analysis showed that
suitable dimensionless numbers could make for a more realistic definition of the system, and could
be used for prototype scale-up and benchmarking purposes. Additionally, comparisons of the results
demonstrated that Re, Gr, Sc, Fr, We, and shape factors are effective. In addition, a study of
mass transfer models revealed that the contact zone was the main area of interest in previous studies,
and this zone was not evaluated in the same way as packed beds. Moreover, CFD studies revealed
that the realizable k-ε turbulence model and the VOF two-phase model, combined with experimental
reaction or mass transfer equations for analyzing hydrodynamic and mass transfer coefficients,
could help define an RPB system in a more realistic way.
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