Supercritical Fluid Extraction of Oleoresin from Curcuma Xanthorrhiza : Modeling and Simulation

Supercritical Fluid Extraction have been used widely in the natural material industries ,because it produced excellent mass transfer properties, ease solubility control due to temperature and pressure. A mathematical model based on shrinking-core model of the extraction process and simulation were used. Previous worker’s have used a model including axial dispersion. They give the effect of an inverse of dimensionless residence time and Peclet number parameters on the extracted concentration. The developed model include radial dispersion and simulation were used in this work. Mechanism of the extraction process involves dissolution of solute, diffusion to the surface of a solid particle in the porous region (intraparticle diffusion), and mass transfer across stagnant-film around the solid particle. Partial differential equation involves radial dispersion and simulation were used. Steadystate, with radial dispersion method was applied in this modeling’s solution ; and Runge Kutta Method was used in this simulation’ solution. These modeling and simulation results are compared to previous worker’s and experimental data. CO2 supercritical fluid extraction of curcuma xanthorrhiza performance in a high pressure extractor cell was used to get experimental data. The temperature in the range of 318 – 338 K and pressure of 10 – 20 MPa is used in this supercritical fluid extraction The curves of Peclet number, an inverse of dimensionless residence time, Biot number on the extracted concentrations are compared to study the effects of operating conditions. The mathematical model and simulation fitted well the experimental data.