MASS-TRANSFER STUDY IN A PULSED BED ELECTRODE - APPLICATION TO THE ELECTRODEPOSITION OF A POLY(DIBENZO-18-CROWN-6) FILM

The polymerization of dibenzo-18-crown-6 has been carried out in an el ectrochemical reactor containing a granular electrode percolated by a pulsed solution. The influence of different parameters (pulse frequenc y, permanent flow velocity of the electrolytic solution, particle diam eter and bed height) on the mass transfer has been studied. A correlat ion between the reduced mass transfer coefficient and the Strouhal num ber has been established. The maximum mass transfer coefficient and th e maximum Strouhal number have been determined as a function of the Ga lilee number. The correlation predicts well the mass transfer coeffici ent over a larger range of the variables than previously achieved.