Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

1

10

9

8

1

10

9

8

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Mass Transfer
Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C?

Both heating and humidification

Humidification only

Evaporative cooling

Heating only

Both heating and humidification

Humidification only

Evaporative cooling

Heating only

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Mass Transfer
For water-ethanol system, the minimum reflux ratio

Is computed from the intercept of the operating line

Cannot be computed

Is the optimum reflux ratio

Is computed from the slope of the upper operating line that is tangent to the equilibrium curve

Is computed from the intercept of the operating line

Cannot be computed

Is the optimum reflux ratio

Is computed from the slope of the upper operating line that is tangent to the equilibrium curve

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Mass Transfer
In liquid extraction, if the selectivity is unity, then

Amount of solvent required will be minimum

Solvent flow rate should be very low

Separation of the constituents is the most effective

No separation will occur

Amount of solvent required will be minimum

Solvent flow rate should be very low

Separation of the constituents is the most effective

No separation will occur

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Mass Transfer
Reverse osmosis is also called

Diffusion

Dialysis

Ultrafiltration

Electrodilysis

Diffusion

Dialysis

Ultrafiltration

Electrodilysis

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Mass Transfer
The most common packing used in industrial operations is __________ rings.

Lessing

Cross-partition

Raschig

Single spiral

Lessing

Cross-partition

Raschig

Single spiral

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Mass Transfer

Mass Transfer Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C?

Mass Transfer For water-ethanol system, the minimum reflux ratio

Mass Transfer In liquid extraction, if the selectivity is unity, then

Mass Transfer Reverse osmosis is also called

Mass Transfer The most common packing used in industrial operations is __________ rings.

Mass Transfer
Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C?

Mass Transfer
For water-ethanol system, the minimum reflux ratio

Mass Transfer
In liquid extraction, if the selectivity is unity, then

Mass Transfer
Reverse osmosis is also called

Mass Transfer
The most common packing used in industrial operations is __________ rings.