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

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

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii)

More number of trays are required and the residue composition is more dilute in methanol
More number of trays are required but the residue composition remains unchanged
Composition of the residue remains unchanged
Less number of trays are required

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
In case of a desorber (stripper), the

Operating line always lies below the equilibrium curve
Temperature remains unaffected
Temperature always increases
Operating line always lies above the equilibrium curve

ANSWER DOWNLOAD EXAMIANS APP