T. Shimada et al., MASS-TRANSFER BETWEEN GASES AND HIGH-VISCOSITY LIQUIDS ON ROTATING CYLINDER WITH SURFACE RENEWAL ACTION, Journal of Chemical Engineering of Japan, 31(2), 1998, pp. 273-276
In many polymer manufacturing processes, mass transfer operations betw
een a high viscosity liquid and gases are applied, but mass transfer r
ates have been explained only using k(L)a. We measured k(L) for molten
polystyrene and corn syrups by using a rotating cylinder with surface
renewal action in which surface area was known. As a result, it is pr
oved that (1) k(L) between gases and high viscosity liquids are expres
sed by Hibgie's penetration theory, and (2) diffusivities are obtained
from measurements of k(L) in corn syrup-CO2 and glycerine-CO2 systems
.