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Mass Transfer

Mass Transfer
The-relative volatility for separation of a non-ideal binary mixture by distillation should be

< 1
1
> 1

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Mass Transfer
High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Very efficient operation
Thermal decomposition of bottoms
Increased relative volatility
Erosion of the tower

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Mass Transfer
Mass transfer co-efficient is defined as

Flux = Co-efficient/concentration difference
Flux=concentration difference/co-effi-cient
None of the listed here
Co-efficient = Flux/concentration difference

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Mass Transfer
__________ developed the film theory.

Higbie
Fick
Levenspeil
Ergun

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Mass Transfer
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed

q > 1
q = 1
q = 0
q < 1

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Mass Transfer
The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same sytem is

10
5
100
1

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