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Mass Transfer

Mass Transfer
When both the fluids flow concurrently in an absorber, the slope of the operating line is

- ve
+ ve
1
-1

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Mass Transfer
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a

Higher relative humidity
Higher dew point
Higher absolute (specific) humidity
Higher wet bulb temperature

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Mass Transfer
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams

Passes through a maximum
Remains unaffected
Decreases
Increases

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Mass Transfer
As the reflux ratio decreases, the

Column diameter increases
Number of plates increases
Separation becomes more efficient
None of these

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Mass Transfer
In distillation columns, the number of bubble caps per tray primarily depends upon the

Allowable gas and liquid velocities
Allowable liquid velocity
Allowable gas velocity
Feed composition

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Mass Transfer
Penetration model (theory) for mass transfer was enunciated by

Danckwerts
Kissinevskii
Higbie
Toor and Marchello

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