Chemical Engineering :: Mass Transfer
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An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is
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__________ column is used in gas absorption process.
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Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.
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Pick out the wrong statement.
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Batch tray dryers suffers from the disadvantage of
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In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter
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__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.
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The 'shanks system' of leaching (i.e., counter-current multiple contact leaching) is used for
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Penetration model (theory) for mass transfer was enunciated by
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A.
With decrease in feed temperature, the number of plates required for binary distillation decreases for a given L/V ratio.
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B.
The extraction per unit of total height for a short packed column is more effective than for a tall column, in case of liquid-liquid extraction.
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C.
Natural draft cooling towers are made of ferro-concrete and its cross-section is wider at the bottom.
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D.
Vanderwall adsorption is also called chemisorption.
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