3273Chemical EngineeringMedium
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) ________?
AMore number of trays are required but the residue composition remains unchanged
BMore number of trays are required and the residue composition is more dilute in methanol
CComposition of the residue remains unchanged
DLess number of trays are required
Correct answer
D. Less number of trays are required
Explanation
The correct answer is Less number of trays are required.