Collect. Czech. Chem. Commun. 1985, 50, 1685-1698

Mass transfer accompanied by chemical reaction in a liquid dispersion

Jan Ptáček, Vladimír Rod and Vladislav Hančil

Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol


An experimental procedure has been worked out to measure mass transfer rates in the presence of a chemical reaction in a liquid dispersion in a batch mixed vessel by a dynamic method. Transfer rates have been observed of iodine between decalin and water phase containing potassium iodide. The transfer was described by the pseudohomogeneous model. Transport parameters of this model have been evaluated from the response of the system to a step concentration change in the continuous phase. The model of the experiment described distortion of the information in the sampling device for the continuous phase. Dependences have been measured of the iodine transfer coefficients in both phases on the intensity of mixing and volume hold-up of the dispersed liquid. By a suitable choice of the concentration in the continuous phase the ratio could be adjusted of the resistance against the transfer in both phases and the sensitivity could be affected of the objective function to the evaluated model parameters.