MASS TRANSFER PERFORMANCE IN A PULSED SIEVE PLATE EXTRACTION COLUMN

摘要

Mass transfer experiments were carried out in a pulsed-sieve-plate extraction column (PSEC) of 150mm diameter with a working system of 30%TBP (in kerosene) - nitric acid - water. The mass transfer and axial mixing coefficients were evaluated from the measured solute concentration profiles and by the dynamic stimulus-response process. The experimental data of diffusional height of transfer unit from the two methods were correlated and a semi-empirical correlation was developed for predicting the mass transfer performance in PSEC. In this equation the influence of the column diameter was considered. The values of apparent height of transfer unit predicted by (HTU)_(OCP) = (HTU)_(OC) + (HTU)_(OCP) were compared with the experimental data, which showed they fit very well.