A mathematical model for gas-liquid interphase mass transfer was established based on the visual study of fluid flow in a rotating packed bed (RPB). The effects of model parameters on liquid mass transfer coefficient kL

as well as the effect of operation parameters on overall volumetric mass transfer coefficient KLa in gas-liquid mass transfer process of water deoxygenation by a nitrogen stream were studied via numerical simulations with the mathematical model. Simulation results indicated that kL increased with decreasing liquid residence time and increasing liquid molecular diffusivity. KLa increased with increasing higee (high gravity) factor

temperature and liquid flow rate but influenced hardly by pressure

and decreased slightly with increasing gas flow rate. Additionally

the mass transfer contribution of cavity zone diminished with increasing higee factor

as well as decreasing cavity zone volume. According to numerical simulation results

the nature of process intensification for gas-liquid mass transfer process in RPB lay in transient liquid residence time. Deoxygenation efficiency E calculated from this model agreed well with experimental E extracted from literatures with deviations within ±16%

which verified the mass transfer model.