For a system in which component A is transferring from the gas to the
liquid phase, the equilibrium relation is given
by
pA,i = 0.75cA,i
where pA,i is the equilibrium partial pressure in atm, and cA,i is the
equilibrium concentration in moles per liter.
At one point in the atmospheric mass-transfer equipment, the liquid
stream contains 0.045 mol/liter and the gas
stream contains 9.0 mol% A. The individual gas-film coefficient kG at
this point in the apparatus has a value of
2.7 mol/(s m^2 atm). Thirty percent of the overall resistance to mass
transfer is known to be encountered in the liquid
phase. Evaluate
(a) the molar flux of A
(b) the liquid interfacial concentration of A
(c) the overall mass-transfer coefficient KG. |
