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Mass Transfer

Mass Transfer
Surface renewal model of mass transfer was enunciated by

Fick
Toor and Marchello
Danckwerts
Stefan

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Mass Transfer
Which one of the following devices is not used for both the absorption as well as the liquid-liquid extraction processes?

Spray towers
Wetted wall columns
Packed towers
Plate towers

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Mass Transfer
Design calculation for multiple component distillation is done by

Ponchon-Savarit method
Tray to tray calculations
Mccabe-Thiele method
Enthalpy concentration method

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Mass Transfer
Batch tray dryers suffers from the disadvantage of

High maintenance cost
All of the listed here
High labour cost & low heat economy
Non-uniform & low production rate

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Mass Transfer
The operating cost of a distillation column at minimum reflux ratio is

Zero
Minimum
Maximum
Infinite

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Mass Transfer
The efficiency of a plate column will be maximum, when the flow is ideal __________ the plate.

Above
Across
Both A & B
Neither A nor B

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