Carbon dioxide, CO2 is considered as one of the causes of global warming due to increase of anthropogenic CO2 concentration in the atmosphere. Membrane separation is used to control CO2 emission for this purpose. CO2 gas enters the membrane at 0.02 atm partial pressure and the pressure on the other side of the membrane system is zero. Two different layers of membrane with different permeability value for CO2 gas separation is as per following: Permeability of CO2 in first layer = 523 GPU Permeability of COz in second layer 1300 GPU 1 GPU = 1 x 10 cm' (STP)(cm2 s cm Hg) = 3.35 x10-10 mol/m.s.Pa 1 mol of gas (STP) occupies 24466 cm' of gas volume. Note that GPU is a measurement of gas permeance expressed as ratio of the permeability with the thickness of membrane. Convert the permeability unit (GPU) of CO2 in both layers in m/m.s.atm. The thickness of each membrane during gas permeabilitylstudy is 5 um and membrane area, A 4.9 cm. a) (11 Marks) Calculate the mass flux, NA (kgmol/m.s) of CO2 gas passing through the membrane layers. Given that the thickness of layer 1 is 10 um and layer 2 is two times thicker than layer 1, b) (8 Marks) c) If the membrane has only one layer 1 with a similar total thickness and operation. conditions as above, determine the Imass flux, NA of CO: gas passing through the