MODELING OF SUPERCRITICAL FLUID EXTRACTION KINETIC OF FLAXSEED OIL BY DIFFUSION CONTROL METHOD

Abstract

In this study, Flaxseed oil was extracted by Supercritical Carbondioxide Extraction, and extrac- tion kinetics was modelled using diffusion controlled method.The effect of process parameters, such as pressure (20, 35, 55 MPa), temperature (323 and 343K), and CO2 flow rate (1 and 3 L CO2 /min) on the extraction yield and effective diffusivity (De) wasinvestigated. The effective diffusion coefficient varied between 2.4 x10-12 and 10.8 x10-12 m2 s -1 for theentire range of experiments and increased with the pressure and flow rate. The model fitted well theexperimental data (ADD varied between 2.35 and 7.48%).