Mass Transfer
An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is

9.21
4.605
100
0.001

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Mass Transfer
Which of the following processes is not an example of adsorption applied to gaseous separations?

Removal of objectionable odour and impurities from industrial gases
Decolouration of yellow glycerene
Recovery of valuable solvent vapors from dilute mixture with air and other gases
Dehumidification of air and gas

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Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Solubility of the components of air in water is very small
Water has a high latent heat of evaporation
Lewis number is close to unity
They are always equal under all circumstances

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