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

0.56
1.56
1
2

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Mass Transfer
Channelling is most severe

In towers packed randomly with crushed solids
At very high liquid flow rate
In towers packed with stacked packing
In dumped packing of regular units

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