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Mass Transfer

The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives___________________?

Mass Transfer /
The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives___________________?

A. Low pressure drop and high hold up
B. High pressure drop and low hold up
C. Low pressure drop and low hold up
D. High pressure drop and high hold up

The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives___________________? Read More »

Mass Transfer

It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%) ?

Mass Transfer /
It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%) ?

A. 15 min
B. 51 min
C. 71 min
D. 94 min

It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%) ? Read More »

Mass Transfer

Steam distillation is not recommended to be used, if the _____________________?

Mass Transfer /
Steam distillation is not recommended to be used, if the _____________________?

A. Azeotropic mixture is to be separated and the final product is miscible with water
B. Liquids decompose, if distilled directly at atmospheric pressure
C. Material cannot be distilled by indirect heating even under low pressure, because of the high
boiling temperature
D. Material to be distilled is thermally unstable or has the tendency to react with other
components associated with it, at the boiling temperature

Steam distillation is not recommended to be used, if the _____________________? Read More »

Mass Transfer