مشخصات پژوهش

عنوان	Near-critical carbon dioxide extraction of khoa (Satureja boliviana Benth Briq) using ethanol as a co-solvent: Experiment and modeling
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Near-critical carbon dioxide, Mathematical modeling, Khoa oil, Co-solvent
چکیده	In this work the volatile oil from khoa was extracted using pressurized CO2 with and without ethanol as co-solvent. Kinetic experiments were performed at pressures of 6.5 and 7MPa and temperatures of 294.15 K. The composition of the volatile oil was determined using gas chromatography. The volatile oil was formed predominantly by cymene, 1–8 cineole, isomenthone, pulegone, thymol and caryophyllene. Consequently, we present a mathematical modeling study of the extraction of essential oil from khoa. The overall extraction curves (OECs) obtained for khoa oil were modeled considering the mass transfer based on local equilibrium between solvent and a solid. The influence of pressure and co-solvent on the extraction kinetics was evaluated using a mathematical modeling. The model was solved numerically and validated with experimental data. A novel method for calculating the initial mass fraction of khoaextract is proposed; data of the proposed model are in excellent agreement with the experimental data. Furthermore, the influence of fluidflowrate and particle size has been studied on the extraction efficiency. Finally, a methodology has been established to estimate extraction yield curves in large scale using the data obtained in small-scale experiments.
پژوهشگران	ماریا آنجلا دی آلمید میرالس (نفر پنجم)، رائول پرتیلو پریتو (نفر چهارم)، پریسیلا وجی (نفر سوم)، مسعود رحیمی (نفر دوم)، طهماسب حتمی (نفر اول)