申論題

Problem 4(12%)
Diffusion through a dialysis membrane.
A dialysis process is designed to recover solute A from a solution of 0.02 M (c). The
end product contains A at the concentration of 0.003 M (c₂). The membrane thickness
(L) is m, the distribution (partition) coefficient is 0.7 and the effective
diffusivity of A in membrane is m²/s. The mass transfer coefficients in
the solution on both sides of the membrane are m/s and
m/s.

(d) By increasing the mixing intensity of both liquid phases, we manage to increase the mass coefficients to double their current values. What will be the percent increase in NA?