Mass Transfer
H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

1.56
1
0.56
2

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Mass Transfer
In case of an absorber, the operating

Velocity is more than the loading velocity
Line always lies below the equilibrium curve
Line can be either above or below the equilibrium curve
Line always lies above the equilibrium curve

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