سال انتشار: ۱۳۸۶

محل انتشار: پنجمین کنگره بین المللی مهندسی شیمی

تعداد صفحات: ۱۰

نویسنده(ها):

Haleh Namdar – Iran University of Science and Technology, Tehran, Iran
Mohammad Eikani – Institute of Chemical Technologies, Iranian Research Organization for Science and Technology,Tehran, Iran
Soosan Rowshanzamir – Green Research Center, Iran University of Science and Technology, Tehran, Iran

چکیده:

A mathematical model was developed to simulate superheated water extraction of essential oils. Unsteady state mass balance of the solute in solid and superheated water phases led to two partial differential equations. The model was solved numerically using a finite difference method. Intraparticle diffusivity was selected to be the model tuning parameter. The other parameters were predicted applying existing experimental correlations. The model was verified successfully using the superheated water extraction data for coriander seeds at 20 bar and 125 oC. The results were compared to the earlier results obtained for superheated water extraction of coriander seeds. The extraction efficiencies of different temperatures (100, 125, 150 and 175 oC), mean particle sizes (0.25, 0.50 and 1 mm), and water flow rates (1, 2 and 4 ml/min) were investigated. The results showed that the optimum temperature, mean particle size, and flow rate were 125 oC, 0.5 mm, and 2 ml/min.