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A total of 11 structured packings with surface areas (a p ) from 125 to 500 m 2 /m 3 and corrugation angles (θ) from 45 to 70°were studied to explore the effects of the packing geometry on mass transfer. A new concept, the mixing point density, was proposed to represent the effects of a p and θ. A generalized method to calculate the mixing point density from a P and θ was developed. Dimensionless mass-transfer models are developed to predict the effective area, liquid-film, and gas-film mass-transfer coefficients, with the mixing and Reynolds numbers imbedded into the correlations. Compared with literature models, the models developed in this work capture the effects of the packing geometry and predict the mass-transfer properties in aqueous systems.

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