چكيده به لاتين
Liquid-liquid extraction process next to the distillation process is an importance process that used in petroleum, oil and gas industry. In this study, hydrodynamic and mass transfer of Rotating Disc Contactor studied. It was observed that Population Balance Model that considers breakage and coalescence of droplets, close the results of simulation to real results. Also the models that where important in simulation of this column such as multiphase models, turbulency models and Population Balance Model were discussed. In addition to this, species interphase mass transfer in extraction column, is expressed. In studied column, the dispersed phase was n-heptane and the continuous phase was mixture of water and glycerol. In first, one phase simulation was done and then two phase simulation for different turbulency models with Eulerian two-phase model and Multiple Reference Models applied. After validation of simulation results with scientific source the Population Balance Model was applied, with applied this model the relative error was decreased 5%, also the droplets diameter was in periods of 1 to 6 mm. in the end of two phase simulation mass transfer was discussed. 9% of glycerol from water was transport to n-heptane, also the simulation in two different velocities disc apllied, this shows that the rate of mass transfer increased with increase of velocity of disc. In the end of thesis hydrodynamic results of 3D simulation was presented. Near the disc, the velocity was maximum and there the rate of turbuleny was maximum. The maximum velocity was 1.3 m/s in column. Also, it was observed that the effect of rotation of disc moved well in whole of extraction column.
Keywords: liquid_liquid extraction column-Compotational Fluid Dynamic-Popolution Balance Model-break up Phenomenon-coalescence Phenomenon- mass transfer
