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

Related MCQs

• Heat sensitive materials with very high latent heat of vaporisation may be economically separated using
• When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.
• Pressure drop through plate tower as compared to that through packed tower, for the same duty will be
• At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.
• 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)
• A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.
• In a moderately sized packed absorption tower, channelling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter
• A packed tower compared to a plate tower for a particular mass transfer operation
• Can the efficiency of a plate in the distillation tower be greater than 100%?
• The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives