A new interpretation of overall extraction curves, obtained at supercritical fluid extraction of oil from ground plant material, is presented. The main idea is that a significant fraction of plant material consists of very small particles (“dust”). Their diameter is 30-70 microns. It is assumed that this fraction of dust provides high extraction rates throughout initial step of extraction. This hypothesis was validated on a wide variety of plants using shrinking core model. Estimation of mass fraction of dust is introduced.
сверхкритическая флюидная экстракция, бимодальный зернистый слой, модель сужающегося ядра, апробация модели, supercritical fluid extraction, bimodal packed bed, shrinking core model, model validation
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