Optimization and Kinetic Study of Supercritical CO2 Extraction of Volatile Oil from Fructus Amomi Rotundus

Abstract

Abstract: Objectives: To optimize the supercritical CO2 extraction (SCE) of volatile oil from Fructus amomi rotundus and propose a model to describe the extraction kinetics. Methods: An orthogonal array design was used to optimize the extraction process. A model to describe the extraction kinetics was proposed based on differential mass balance model and Fick,s first law. Results: The optimal extraction conditions were CO2 flow rate of 22 L/h, extraction temperature of 50 ℃, extraction pressure of 28 MPa and extraction time of 3.0 h. Under these extraction conditions, the extraction rate of volatile oil from Fructus amomi rotundus was 2.92%. A dynamic model that could well describe the extraction process was obtained as follows: E＝3.11× (1－e－0.8859t). Conclusion: SCE is applicable to extract volatile oil from Fructus amomi rotundus.

Key words: supercritical CO2 extraction, Fructus amomi rotundus, volatile oil, kinetic model

CLC Number:

TQ 645. 96

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