Answer Happy

In a packed absorption column, hydrogen sulphide (H2S) is removed from natural gas by dissolution in an amine solvent. At a given location in the packed column, the mole fraction of H2S in the bulk of the liquid is 5 x 10-3, the mole fraction of H2S in the bulk of the gas is 3 x 10-2, and the molar flux of H2S across the gas- liquid interface is 2 x 10-5 mol s1 m2. The system can be considered dilute and is well approximated by the equilibrium relationship, ya* = 5x *. =
5 a) Find the overall mass-transfer coefficients based on the gas-phase, Kga, and based on the liquid phase, Kla- [4 marks] = 4. kla b) It is also known that the ratio of the film mass-transfer coefficients is kGA Determine the mole fractions of H2S at the interface, both in the liquid and in the gas. [8 marks]