Mass Transfer
An example of elutioh is

Recovery of vegetable oils from seeds
Dissolution of tannin out of tree barks by water
Separation of sugar from sugar beet by hot water
Separation of uranium oxide from its ore by H₂SO₄ in a Pachuca tank

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Mass Transfer
Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the

Pressure drop in the equipment will be very high
None of these
Viscosity variation of the fluids may cause channeling/flooding
Packing may be crushed due to thermal expansion/contraction of the components of the equipments

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Mass Transfer
Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10⁻³ kg mole/m².s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m² .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is

5.6 x 10⁻³
8.5 x 10⁻⁴
5.6 x 10⁻⁴
8.5 x 10⁻³

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Mass Transfer
The wetted wall tower is used to determine

Individual mass transfer co-efficient (M.T.C.) in gaseous system
M.T.C. of individual components in a liquid-liquid system
M.T.C. of liquid in liquid-gas system
The overall M.T.C. of the system

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Mass Transfer
Heat load in a cooling tower

Both A & B
Is equal to the number of kg, of water circulated times the cooling range
Neither A nor B
Means the amount of heat thrown away (KCal/hr.) by the cooling tower

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