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Mass Transfer

Mass Transfer
Surface renewal model of mass transfer was enunciated by

Toor and Marchello
Stefan
Danckwerts
Fick

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Mass Transfer
NSc/NPr is called the

Sherwood number
Psychrometric ratio
Lewis number
Stantan number

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Mass Transfer
Langmuir equation is associated with

Multicomponent absorption
Steam distillation
Leaching
Adsorption

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

3.97
600
0.24
1

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Mass Transfer
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as

Re0.33
Re0.53
Re0.83
Re

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Mass Transfer
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature)

P vs . log T
Log P vs . T
T vs . P
Log P vs. log T

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