CO, is being absorbed from an air stream into water in a wetted wall column. The process is carried out at 1 atm and 25C where the equilibrium relationship can be approximated by Henry's law (H=1630 atm). The tower is 2 m in height and 0.5 m in diameter. The liquid film flows down the walls of the column at a rate of 50 L/h. The gas stream is introduced from the bottom of the column at a flowrate of 500 L/h. The mass transfer coefficient on the liquid side of the gas-liquid interface at a location 50 cm below the top of the column, where the liquid film thickness is ca. 5 mm, is to be estimated using the following correlation: Sh, = 0.69Re5 Sc0.5 where Re, = umx/v is the local Reynolds number, x is the distance from the top of the column and um is the mean velocity of the liquid. For the gas side, you may choose a suitable correlation from the table on the back page. Some fluid properties that may be relevant are given below: v (m Is) Dco,loir Dco:water 0.2 x 10-8 Liquid 0.9x 10-6 Gas 16 x 10-6 0.16 x 10-4 a. Find the compositions of the liquid and the gas at the interface at a location 50 cm below the top of the column, where the bulk liquid contains 10 ppm(mol) CO, and the bulk gas contains 2.0 mol%. b. What is the flux of CO, at this point in the column? c. How would your analyses change if the operating conditions in the column were changed such that the bulk concentrations are ten times higher?