An aqueous solution of methanol is to be distilled in a tray column. High pressu

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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)

Options:

A . Less number of trays are required

B . Composition of the residue remains unchanged

C . More number of trays are required but the residue composition remains unchanged

D . More number of trays are required and the residue composition is more dilute in methanol

Answer: Option A

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