Chemical Engineering > GATE 2020 > Absorption
SO2 from air is absorbed by pure water in a counter current packed column operating at constant pressure. The compositions and the flow rates of the streams are shown in the figure.
In addition, use the following data and assumptions
• Column operates under isothermal conditions
• At the operating temperature of the column, y*=40x, where y* is the mole fraction of SO2 in the gas that is in equilibrium with water containing SO2 at a mole fraction of x
• Solution is dilute and the operating line is linear
• Negligible amount of water evaporates
The number of transfer units (NTU) for this column is
• Column operates under isothermal conditions
• At the operating temperature of the column, y*=40x, where y* is the mole fraction of SO2 in the gas that is in equilibrium with water containing SO2 at a mole fraction of x
• Solution is dilute and the operating line is linear
• Negligible amount of water evaporates
The number of transfer units (NTU) for this column is
Correct : d
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