Investigation of Pulsed and non-Pulsed Conditions in Disc and Doughnut Columns on the Holdup of Dispersed Phase and Slip Velocity
Volume Title: 1
1Materials and Nuclear Fuel Research School, Nuclear Science and Technology Research Institute
2Materials and Nuclear Fuel Research School, Nuclear Science and Technology Research Institute, P.O. Box 11365-8486, Tehran, Iran
Limiting energy consumption increases the requirement for employing the systems with the reduction in energy consumption. Therefore, non-pulsed conditions in pulsed extraction columns are critical in the operating state. The non-pulsed conditions in the disc and doughnut column showed that the dispersed phase holdup was very high under these conditions and the mixer-settler regime was dominant within the column. The variation in the regime and the reduction in dispersed phase holdup observed with the increment in pulse intensities. Then, the dispersed phase holdup increased by the shifting from transition region to dispersion regime. The effects of aqueous phase velocity are negligible in non-pulsed conditions. The effects of organic phase velocity in both conditions increase the holdup of the dispersed phase and the reduction in slip velocity appears in the experiments.