Mass Transfer
The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m²/m³)

50
1000
500
100

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Mass Transfer
Plate efficiency

Increases due to weeping and dumping of liquid
Increases due to foaming
Is a function of the mass transfer between liquid and vapour
Increases due to liquid entrainment

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