2 An Experiment Is Carried Out To Study The Mass Transfer Of Solute A Into An Air And Water In A Wetted Wall Column Th 1 (67.95 KiB) Viewed 12 times
2) An experiment is carried out to study the mass transfer of solute A into an air and water in a wetted wall column. The experiment is conducted at room temperature of 25 °C and 1 atm abs pressure. Data was collected and tabulated in the Table Q2. Given that at one point in the wetted-wall column, the mole fraction of solute A in the bulk gas phase is 0.30 and the mole fraction of solute A in the liquid phase is 0.09. Using correlation for dilute solution in the wetted-wall tower, the film mass transfer coefficient for NH3 in the gas phase is predicted as KG = 2.651 x 104 kg mol/s-m²-atm and for the liquid phase as kx = 6.901 x 104 kg mol/s-m²-mol fraction. a. Evaluate whether this mass transfer process is a liquid stripping or gas absorption process. (10 marks) b. Assess whether this mass transfer process is operated at steady state. Support your answer with appropriate calculations and graphical evidence.. c. List any assumptions you made in Question 2b. (25 marks) (5 marks) d. Evaluate whether the major resistance to mass transfer lies in the gas phase or the liquid phase. (10 marks) [Total = 50 marks]
Table Q2 The equilibrium data at 298 K and 1 atm XA YA 0.00 0.00 0.03 0.01 0.06 0.02 0.11 0.05 0.17 0.09 0.23 0.16 0.26 0.20 0.30 0.26 0.33 0.31 0.37 0.39 0.40 0.46
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