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Mass Transfer

Mass Transfer
CO₂ can be absorbed by

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

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Mass Transfer
Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in

Large minimum liquid to gas (L/G) ratio
All of these
Large number of trays
Decreased solute solubility

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Mass Transfer
An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is

9.21
0.001
100
4.605

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Mass Transfer
The equipment used in the extraction of highly corrosive radio active liquids is

Mixer settler
Pulse column
Spray column
Baffle tower

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Mass Transfer
The Kundsen diffusivity is proportional to (where, T = absolute temperature)

√T
T
T⁴
T²

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Mass Transfer
Large scale usage of flash distillation is practised in

Polymerisation industry
Ammonia synthesis plant
Petroleum refinning
Soap manufacturing

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