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Mass Transfer

Mass Transfer
CO₂ can be absorbed by

Hot cupric oxide
Alumina
Heated charcoal
Cold Ca(OH)₂

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Mass Transfer
Degree of freedom for leaching and solvent extraction process is

1
2
3

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Mass Transfer
In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raf-finate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg)

6.89
10
8.25
8.89

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Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

1
600
0.24
3.97

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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)

500
1000
50
100

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Mass Transfer
Pore size of the molecular seive 5A is __________ mm.

50
0.05
5
0.5

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