Mass Transfer
Channelling is most severe

At very high liquid flow rate
In towers packed with stacked packing
In towers packed randomly with crushed solids
In dumped packing of regular units

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Mass Transfer
For absorbing a sparingly soluble gas in a liquid

Mass transfer co-efficient must be kept constant
Gas side mass transfer co-efficient should be increased
Liquid side mass transfer co-efficient should be decreased
Liquid side mass transfer co-efficient should be increased

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