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Mass Transfer

Mass Transfer
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line)

LG/m
G/mL
ML/G
L/mG

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Mass Transfer
Low viscosity absorbent is preferred for reasons of

Improved flooding characteristics
All of these
Low pressure drop on pumping
Rapid absorption rates and good heat transfer characteristics

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Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

F/2
F
2f
1/f

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Mass Transfer
At constant pressure, with increase of temperature, the dew point will

Decrease
Increase/decrease ; depends on the temperature
Increase
Remain unchanged

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Mass Transfer
HETP is numerically equal to HTU, only when the operating line

Lies above the equilibrium line
Is far from the equilibrium line
And equilibrium lines are parallel
Lies below the equilibrium line

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Mass Transfer
Molecular seives are porous

Silica
Synthetic zeolites crystals/metal alumino-silicates
None of these
Alumina

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